merge zig: upgrade from 0.11 to 0.12.0

mostly lots of language improvements and bugfixes, leading to better
code here, from the programming language point of view.

zig v0.12.0 release notes:
https://ziglang.org/download/0.12.0/release-notes.html

.clang-format

@@ -0,0 +1,15 @@
+# https://clang.llvm.org/docs/ClangFormat.html
+# https://clang.llvm.org/docs/ClangFormatStyleOptions.html
+---
+IndentWidth: 4
+ContinuationIndentWidth: 4
+UseTab: Never
+ColumnLimit: 102
+PointerAlignment: Right
+BreakBeforeBraces: Linux
+AlignAfterOpenBracket: DontAlign
+BinPackArguments: false
+BinPackParameters: false
+AllowAllArgumentsOnNextLine: true
+AllowAllParametersOfDeclarationOnNextLine: true
+AllowShortFunctionsOnASingleLine: Empty

.git-blame-ignore-revs

@@ -0,0 +1,3 @@
+# zig fmt and clang-format all lib/ and src/
+698e5b6f76f4cec712e147e86f6c373f811e28d0
+2ecd44a7dbd03645de71a76ef5763ebc2bbe707e

.woodpecker.yml

@@ -0,0 +1,35 @@
+clone:
+  git:
+    image: woodpeckerci/plugin-git
+    # https://woodpecker-ci.org/plugins/Git%20Clone
+    settings:
+      # tags are required for aarch64 release builds for semver
+      tags: true
+      lfs: false
+      recursive: false
+pipeline:
+  lint:
+    image: git.qcode.ch/nakamochi/ci-zig0.12.0:v1
+    commands:
+      - ./tools/fmt-check.sh
+  test:
+    image: git.qcode.ch/nakamochi/ci-zig0.12.0:v1
+    commands:
+      - zig build test
+  sdl2:
+    image: git.qcode.ch/nakamochi/ci-zig0.12.0:v1
+    commands:
+      - zig build -Ddriver=sdl2
+  x11:
+    image: git.qcode.ch/nakamochi/ci-zig0.12.0:v1
+    commands:
+      - zig build -Ddriver=x11
+  aarch64:
+    image: git.qcode.ch/nakamochi/ci-zig0.12.0:v1
+    commands:
+      - zig build -Ddriver=fbev -Dtarget=aarch64-linux-musl -Doptimize=ReleaseSafe -Dstrip
+      - sha256sum zig-out/bin/nd zig-out/bin/ngui
+  playground:
+    image: git.qcode.ch/nakamochi/ci-zig0.12.0:v1
+    commands:
+      - zig build guiplay btcrpc lndhc

LICENSE

@@ -1,5 +1,6 @@
 The MIT License (MIT)
 
+Copyright (c) 2023 qeles AG
 Copyright (c) 2022 alex@cloudware.io
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

README.md

@@ -1,5 +1,102 @@
-build for rpi:
+# nakamochi daemon and gui (ndg)
 
-    zig build -Dtarget=aarch64-linux-musl -Ddriver=fbev -Drelease-safe -Dstrip
+release build for linux/aarch64, a raspberry pi 4:
 
-otherwise just `zig build` on dev host
+    zig build -Dtarget=aarch64-linux-musl -Ddriver=fbev -Doptimize=ReleaseSafe -Dstrip
+
+a dev build for a native arch linux host running Xorg can be compiled simply
+with `zig build`. otherwise, for macOS or non-X11 platforms use SDL2:
+
+    zig build -Ddriver=sdl2
+
+## local development
+
+you'll need [zig v0.11.x](https://ziglang.org/download/).
+if working on the gui, also [SDL2](https://www.libsdl.org/).
+
+note that compiling the daemon on macOS is currently unsupported since
+it requires some linux primitives.
+
+compiling is expected to be as easy as
+
+    # only gui
+    zig build ngui
+    # only daemon
+    zig build nd
+    # everything at once
+    zig build
+
+the output is placed in `./zig-out/bin` directory. for example, to run the gui,
+simply execute `./zig-out/bin/ngui`.
+
+the build script has a few project-specific options. list them all with
+a `zig build --help` command. for instance, to reduce LVGL logging verbosity in
+debug build mode, one can set this extra build flag:
+
+    zig build ngui -Dlvgl_loglevel=warn
+
+run all tests with
+
+    zig build test
+
+or a filtered subset using `test-filter`:
+
+    zig build test -Dtest-filter=xxx
+
+significant contributors may find adding [.git-blame-ignore-revs](.git-blame-ignore-revs)
+file to their git config useful, to skip very likely irrelevant commits
+when browsing `git blame`:
+
+    git config blame.ignoreRevsFile .git-blame-ignore-revs
+
+see also the [contributing](#contributing) section.
+
+## CI automated checks
+
+the CI runs code format checks, tests and builds for fbdev+evdev on aarch64
+and SDL2. it requires a container image with zig and clang tools such as
+clang-format.
+
+to make a new image and switch the CI to use it, first modify the
+[ci-containerfile](tools/ci-containerfile) and produce the image locally:
+
+    podman build --rm -t ndg-ci -f ./tools/ci-containerfile \
+      --build-arg ZIGURL=https://ziglang.org/download/0.12.0/zig-linux-x86_64-0.12.0.tar.xz
+
+then tag it with the target URL, for example:
+
+    podman tag localhost/ndg-ci git.qcode.ch/nakamochi/ci-zig0.12.0:v1
+
+generate an [access token](https://git.qcode.ch/user/settings/applications),
+login to the container registry and push the image to remote:
+
+    podman login git.qcode.ch
+    podman push git.qcode.ch/nakamochi/ci-zig0.12.0:v1
+
+the image will be available at
+https://git.qcode.ch/nakamochi/-/packages/
+
+finally, delete the access token from
+https://git.qcode.ch/user/settings/applications
+
+what's left is to update the CI [build pipeline](.woodpecker.yml) and delete
+the older version of the image.
+
+## contributing
+
+to contribute, create a pull request or send a patch with
+[git send-mail](https://git-scm.com/docs/git-send-email) to alex-dot-cloudware.io.
+
+before sending a change, please make sure tests pass:
+
+    zig build test
+
+and all code is formatted: zig code with `zig fmt` and C according to the
+style described by [.clang-format](.clang-format) file. if `clang-format` tool
+is installed, all formatting can be checked with:
+
+    ./tools/fmt-check.sh
+
+note that only C files in `src/` are formatted.
+leave third party libraries as is - it is easier to update and upgrade when
+the original style is preserved, even if it doesn't match this project.

build.zig

@@ -1,123 +1,202 @@
 const std = @import("std");
-const nifbuild = @import("lib/nif/build.zig");
-
-pub fn build(b: *std.build.Builder) void {
-    b.use_stage1 = true;
 
+pub fn build(b: *std.Build) void {
     const target = b.standardTargetOptions(.{});
-    const mode = b.standardReleaseOptions();
+    const optimize = b.standardOptimizeOption(.{});
     const strip = b.option(bool, "strip", "strip output binary; default: false") orelse false;
-    const drv = b.option(DriverTarget, "driver", "display and input drivers combo; default: sdl2") orelse .sdl2;
+    const drv = b.option(DriverTarget, "driver", "display and input drivers combo; default: x11") orelse .x11;
     const disp_horiz = b.option(u32, "horiz", "display horizontal pixels count; default: 800") orelse 800;
     const disp_vert = b.option(u32, "vert", "display vertical pixels count; default: 480") orelse 480;
+    const lvgl_loglevel = b.option(LVGLLogLevel, "lvgl_loglevel", "LVGL lib logging level") orelse LVGLLogLevel.default(optimize);
+    const inver = b.option([]const u8, "version", "semantic version of the build; must match git tag when available");
+
+    const buildopts = b.addOptions();
+    const buildopts_mod = buildopts.createModule();
+    buildopts.addOption(DriverTarget, "driver", drv);
+    const semver_step = VersionStep.create(b, buildopts, inver);
+    buildopts.step.dependOn(semver_step);
+
+    // network interface (nif) standalone library used by the daemon and tests.
+    const libnif_dep = b.lazyDependency("nif", .{ .target = target, .optimize = optimize }) orelse return;
+    const libnif = libnif_dep.artifact("nif");
+    // ini file format parser
+    const libini_dep = b.lazyDependency("ini", .{ .target = target, .optimize = optimize }) orelse return;
+
+    const common_cflags = .{
+        "-Wall",
+        "-Wextra",
+        "-Wundef",
+        // strip source file paths for repro builds
+        b.fmt("-ffile-prefix-map={s}/=/", .{b.pathFromRoot("")}),
+    };
 
     // gui build
-    const ngui = b.addExecutable("ngui", "src/ngui.zig");
-    ngui.setTarget(target);
-    ngui.setBuildMode(mode);
+    const ngui = b.addExecutable(.{
+        .name = "ngui",
+        .root_source_file = b.path("src/ngui.zig"),
+        .target = target,
+        .optimize = optimize,
+        .link_libc = true,
+        .strip = strip,
+    });
     ngui.pie = true;
-    ngui.strip = strip;
-
-    ngui.addIncludePath("lib");
-    ngui.addIncludePath("src/ui/c");
-    ngui.linkLibC();
+    ngui.root_module.addImport("build_options", buildopts_mod);
+    ngui.addIncludePath(b.path("lib"));
+    ngui.addIncludePath(b.path("src/ui/c"));
 
-    const lvgl_flags = &.{
+    const lvgl_flags = .{
         "-std=c11",
         "-fstack-protector",
-        "-Wall",
-        "-Wextra",
         "-Wformat",
         "-Wformat-security",
-        "-Wundef",
-    };
-    ngui.addCSourceFiles(lvgl_generic_src, lvgl_flags);
+    } ++ common_cflags;
+    ngui.addCSourceFiles(.{ .files = lvgl_generic_src, .flags = &lvgl_flags });
 
-    const ngui_cflags: []const []const u8 = &.{
+    const ngui_cflags = .{
         "-std=c11",
-        "-Wall",
-        "-Wextra",
         "-Wshadow",
-        "-Wundef",
         "-Wunused-parameter",
         "-Werror",
-    };
-    ngui.addCSourceFiles(&.{
-        "src/ui/c/ui.c",
-        "src/ui/c/lv_font_courierprimecode_14.c",
-        "src/ui/c/lv_font_courierprimecode_16.c",
-        "src/ui/c/lv_font_courierprimecode_24.c",
-    }, ngui_cflags);
-
-    ngui.defineCMacroRaw(b.fmt("NM_DISP_HOR={}", .{disp_horiz}));
-    ngui.defineCMacroRaw(b.fmt("NM_DISP_VER={}", .{disp_vert}));
-    ngui.defineCMacro("LV_CONF_INCLUDE_SIMPLE", null);
+    } ++ common_cflags;
+    ngui.addCSourceFiles(.{
+        .root = b.path("src/ui/c"),
+        .files = &.{
+            "ui.c",
+            "lv_font_courierprimecode_14.c",
+            "lv_font_courierprimecode_16.c",
+            "lv_font_courierprimecode_24.c",
+        },
+        .flags = &ngui_cflags,
+    });
+
+    ngui.root_module.addCMacro("NM_DISP_HOR", b.fmt("{d}", .{disp_horiz}));
+    ngui.root_module.addCMacro("NM_DISP_VER", b.fmt("{d}", .{disp_vert}));
+    ngui.defineCMacro("LV_CONF_INCLUDE_SIMPLE", "1");
+    ngui.defineCMacro("LV_LOG_LEVEL", lvgl_loglevel.text());
     ngui.defineCMacro("LV_TICK_CUSTOM", "1");
-    ngui.defineCMacro("LV_TICK_CUSTOM_INCLUDE", "\"ui.h\"");
+    ngui.defineCMacro("LV_TICK_CUSTOM_INCLUDE", "\"lv_custom_tick.h\"");
     ngui.defineCMacro("LV_TICK_CUSTOM_SYS_TIME_EXPR", "(nm_get_curr_tick())");
     switch (drv) {
         .sdl2 => {
-            ngui.addCSourceFiles(lvgl_sdl2_src, lvgl_flags);
-            ngui.addCSourceFile("src/ui/c/drv_sdl2.c", ngui_cflags);
-            ngui.defineCMacro("NM_DRV_SDL2", null);
-            ngui.defineCMacro("USE_SDL", null);
+            ngui.addCSourceFiles(.{ .files = lvgl_sdl2_src, .flags = &lvgl_flags });
+            ngui.addCSourceFile(.{ .file = b.path("src/ui/c/drv_sdl2.c"), .flags = &ngui_cflags });
+            ngui.defineCMacro("USE_SDL", "1");
             ngui.linkSystemLibrary("SDL2");
         },
+        .x11 => {
+            ngui.addCSourceFiles(.{ .files = lvgl_x11_src, .flags = &lvgl_flags });
+            ngui.addCSourceFiles(.{
+                .files = &.{
+                    "src/ui/c/drv_x11.c",
+                    "src/ui/c/mouse_cursor_icon.c",
+                },
+                .flags = &ngui_cflags,
+            });
+            ngui.defineCMacro("USE_X11", "1");
+            ngui.linkSystemLibrary("X11");
+        },
         .fbev => {
-            ngui.addCSourceFiles(lvgl_fbev_src, lvgl_flags);
-            ngui.addCSourceFile("src/ui/c/drv_fbev.c", ngui_cflags);
-            ngui.defineCMacro("NM_DRV_FBEV", null);
-            ngui.defineCMacro("USE_FBDEV", null);
-            ngui.defineCMacro("USE_EVDEV", null);
+            ngui.addCSourceFiles(.{ .files = lvgl_fbev_src, .flags = &lvgl_flags });
+            ngui.addCSourceFile(.{ .file = b.path("src/ui/c/drv_fbev.c"), .flags = &ngui_cflags });
+            ngui.defineCMacro("USE_FBDEV", "1");
+            ngui.defineCMacro("USE_EVDEV", "1");
         },
     }
 
     const ngui_build_step = b.step("ngui", "build ngui (nakamochi gui)");
-    ngui_build_step.dependOn(&b.addInstallArtifact(ngui).step);
+    ngui_build_step.dependOn(&b.addInstallArtifact(ngui, .{}).step);
 
     // daemon build
-    const nd = b.addExecutable("nd", "src/nd.zig");
-    nd.setTarget(target);
-    nd.setBuildMode(mode);
+    const nd = b.addExecutable(.{
+        .name = "nd",
+        .root_source_file = b.path("src/nd.zig"),
+        .target = target,
+        .optimize = optimize,
+        .strip = strip,
+    });
     nd.pie = true;
-    nd.strip = strip;
-
-    nifbuild.addPkg(b, nd, "lib/nif");
-    const niflib = nifbuild.library(b, "lib/nif");
-    niflib.setTarget(target);
-    niflib.setBuildMode(mode);
-    nd.linkLibrary(niflib);
+    nd.root_module.addImport("build_options", buildopts_mod);
+    nd.root_module.addImport("nif", libnif_dep.module("nif"));
+    nd.root_module.addImport("ini", libini_dep.module("ini"));
+    nd.linkLibrary(libnif);
 
     const nd_build_step = b.step("nd", "build nd (nakamochi daemon)");
-    nd_build_step.dependOn(&b.addInstallArtifact(nd).step);
-
-    // default build
-    const build_all_step = b.step("all", "build everything");
-    build_all_step.dependOn(ngui_build_step);
-    build_all_step.dependOn(nd_build_step);
-    b.default_step.dependOn(build_all_step);
+    nd_build_step.dependOn(&b.addInstallArtifact(nd, .{}).step);
 
+    // automated tests
     {
-        const tests = b.addTest("src/test.zig");
-        tests.setTarget(target);
-        tests.setBuildMode(mode);
-        tests.linkLibC();
-        if (b.args) |args| {
-            for (args) |a, i| {
-                if (std.mem.eql(u8, a, "--test-filter")) {
-                    tests.setFilter(args[i + 1]); // don't care about OOB
-                    break;
-                }
-            }
-        }
+        const tests = b.addTest(.{
+            .root_source_file = b.path("src/test.zig"),
+            .target = target,
+            .optimize = optimize,
+            .link_libc = true,
+            .filter = b.option([]const u8, "test-filter", "run tests matching the filter"),
+        });
+        tests.root_module.addImport("build_options", buildopts_mod);
+        tests.root_module.addImport("nif", libnif_dep.module("nif"));
+        tests.root_module.addImport("ini", libini_dep.module("ini"));
+        tests.linkLibrary(libnif);
 
+        const run_tests = b.addRunArtifact(tests);
         const test_step = b.step("test", "run tests");
-        test_step.dependOn(&tests.step);
+        test_step.dependOn(&run_tests.step);
+    }
+
+    // GUI playground
+    {
+        const guiplay = b.addExecutable(.{
+            .name = "guiplay",
+            .root_source_file = b.path("src/test/guiplay.zig"),
+            .target = target,
+            .optimize = optimize,
+        });
+        guiplay.root_module.addImport("comm", b.createModule(.{ .root_source_file = b.path("src/comm.zig") }));
+
+        const guiplay_build_step = b.step("guiplay", "build GUI playground");
+        guiplay_build_step.dependOn(&b.addInstallArtifact(guiplay, .{}).step);
+        guiplay_build_step.dependOn(ngui_build_step);
+    }
+
+    // bitcoind RPC client playground
+    {
+        const btcrpc = b.addExecutable(.{
+            .name = "btcrpc",
+            .root_source_file = b.path("src/test/btcrpc.zig"),
+            .target = target,
+            .optimize = optimize,
+            .strip = strip,
+        });
+        btcrpc.root_module.addImport("bitcoindrpc", b.createModule(.{ .root_source_file = b.path("src/bitcoindrpc.zig") }));
+
+        const btcrpc_build_step = b.step("btcrpc", "bitcoind RPC client playground");
+        btcrpc_build_step.dependOn(&b.addInstallArtifact(btcrpc, .{}).step);
+    }
+
+    // lnd HTTP API client playground
+    {
+        const lndhc = b.addExecutable(.{
+            .name = "lndhc",
+            .root_source_file = b.path("src/test/lndhc.zig"),
+            .target = target,
+            .optimize = optimize,
+            .strip = strip,
+        });
+        lndhc.root_module.addImport("lightning", b.createModule(.{ .root_source_file = b.path("src/lightning.zig") }));
+
+        const lndhc_build_step = b.step("lndhc", "lnd HTTP API client playground");
+        lndhc_build_step.dependOn(&b.addInstallArtifact(lndhc, .{}).step);
     }
+
+    // default build step
+    const build_all_step = b.step("all", "build nd and ngui (default step)");
+    build_all_step.dependOn(ngui_build_step);
+    build_all_step.dependOn(nd_build_step);
+    b.default_step.dependOn(build_all_step);
 }
 
 const DriverTarget = enum {
     sdl2,
+    x11,
     fbev, // framebuffer + evdev
 };
 
@@ -126,6 +205,10 @@ const lvgl_sdl2_src: []const []const u8 = &.{
     "lib/lv_drivers/sdl/sdl_common.c",
 };
 
+const lvgl_x11_src: []const []const u8 = &.{
+    "lib/lv_drivers/x11/x11.c",
+};
+
 const lvgl_fbev_src: []const []const u8 = &.{
     "lib/lv_drivers/display/fbdev.c",
     "lib/lv_drivers/indev/evdev.c",
@@ -281,3 +364,112 @@ const lvgl_generic_src: []const []const u8 = &.{
     "lib/lvgl/src/widgets/lv_table.c",
     "lib/lvgl/src/widgets/lv_textarea.c",
 };
+
+/// LVGL log levels based on LV_LOG_LEVEL_xxx.
+/// note that the messages are printed from a zig fn callback, always with .info std.log.Level.
+const LVGLLogLevel = enum {
+    trace,
+    info,
+    warn,
+    err,
+    user,
+    none,
+
+    /// returns default mode based on the compiler optimization flags.
+    fn default(mode: std.builtin.Mode) @This() {
+        return switch (mode) {
+            .Debug => .warn,
+            .ReleaseSafe => .warn,
+            .ReleaseFast, .ReleaseSmall => .err,
+        };
+    }
+
+    /// returns a C #define value for LVGL config.
+    fn text(self: @This()) []const u8 {
+        return switch (self) {
+            .trace => "LV_LOG_LEVEL_TRACE",
+            .info => "LV_LOG_LEVEL_INFO",
+            .warn => "LV_LOG_LEVEL_WARN",
+            .err => "LV_LOG_LEVEL_ERROR",
+            .user => "LV_LOG_LEVEL_USER",
+            .none => "LV_LOG_LEVEL_NONE",
+        };
+    }
+};
+
+/// VersionStep injects a release build semantic version into buildopts as "semver".
+/// the make step fails if the inver input version and the one found in a git tag mismatch.
+///
+/// while git-tagged versions are expected to be in v<semver>format, input version
+/// to match against is any format supported by std.SemanticVersion.parse.
+/// input version is optional; if unset, make fn succeeds given a correctly formatted
+/// git tag is found.
+const VersionStep = struct {
+    inver: ?[]const u8, // input version in std.SemanticVersion.parse format
+    buildopts: *std.Build.Step.Options, // where to store the build version
+
+    b: *std.Build,
+    step: std.Build.Step,
+
+    fn create(b: *std.Build, o: *std.Build.Step.Options, inver: ?[]const u8) *std.Build.Step {
+        const vstep = b.allocator.create(VersionStep) catch unreachable;
+        vstep.* = VersionStep{
+            .inver = inver,
+            .buildopts = o,
+            .b = b,
+            .step = std.Build.Step.init(.{
+                .id = .custom,
+                .name = "VersionStep: ndg semver",
+                .owner = b,
+                .makeFn = make,
+            }),
+        };
+        return &vstep.step;
+    }
+
+    fn make(step: *std.Build.Step, _: *std.Progress.Node) anyerror!void {
+        const self: *@This() = @fieldParentPtr("step", step);
+        const semver = try self.eval();
+        std.log.info("build version: {any}", .{semver});
+        self.buildopts.addOption(std.SemanticVersion, "semver", semver);
+    }
+
+    fn eval(self: *VersionStep) !std.SemanticVersion {
+        const repover = try self.gitver();
+        if (self.inver) |v| {
+            const insem = std.SemanticVersion.parse(v) catch |err| {
+                std.log.err("invalid input semver '{s}': {any}", .{ v, err });
+                return err;
+            };
+            if (repover != null and insem.order(repover.?) != .eq) {
+                std.log.err("input and repo semver mismatch: {any} vs {any}", .{ insem, repover });
+                return error.VersionMismatch;
+            }
+            return insem;
+        }
+
+        if (repover == null) {
+            std.log.err("must supply build semver from command line.", .{});
+            return error.MissingVersion;
+        }
+        return repover.?;
+    }
+
+    fn gitver(self: *VersionStep) !?std.SemanticVersion {
+        if (!std.process.can_spawn) {
+            return null;
+        }
+        const git = self.b.findProgram(&[_][]const u8{"git"}, &[_][]const u8{}) catch return null;
+
+        const prefix = "v"; // git tag prefix
+        const matchTag = self.b.fmt("{s}*.*.*", .{prefix});
+        const cmd = [_][]const u8{ git, "-C", self.b.pathFromRoot("."), "describe", "--match", matchTag, "--tags", "--abbrev=8" };
+        var code: u8 = undefined;
+        const git_describe = self.b.runAllowFail(&cmd, &code, .Ignore) catch return null;
+        const repotag = std.mem.trim(u8, git_describe, " \n\r")[prefix.len..];
+        return std.SemanticVersion.parse(repotag) catch |err| ret: {
+            std.log.err("unparsable git tag semver '{s}': {any}", .{ repotag, err });
+            break :ret err;
+        };
+    }
+};

build.zig.zon

@@ -0,0 +1,17 @@
+.{
+    .name = "ndg",
+    .version = "0.8.1",
+    .dependencies = .{
+        .nif = .{
+            .path = "lib/nif",
+        },
+        .ini = .{
+            .path = "lib/ini",
+        },
+    },
+    .paths = .{
+        "build.zig",
+        "build.zig.zon",
+        "src",
+    },
+}

lib/ini/.gitattributes

@@ -0,0 +1,2 @@
+*.zig text=auto eol=lf
+*.zig text=auto eol=lf

lib/ini/.github/FUNDING.yml

@@ -0,0 +1 @@
+github: MasterQ32

lib/ini/.gitignore

@@ -0,0 +1,2 @@
+zig-cache/
+zig-out/

lib/ini/LICENCE

@@ -0,0 +1,19 @@
+Copyright (c) 2021 Felix "xq" Queißner
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
+OR OTHER DEALINGS IN THE SOFTWARE.

lib/ini/README.md

@@ -0,0 +1,81 @@
+# INI parser library
+
+This is a very simple ini-parser library that provides:
+- Raw record reading
+- Leading/trailing whitespace removal
+- comments based on `;` and `#`
+- Zig API
+- C API
+
+## Usage example
+
+### Zig 
+
+```zig
+const std = @import("std");
+const ini = @import("ini");
+
+pub fn main() !void {
+    const file = try std.fs.cwd().openFile("example.ini", .{});
+    defer file.close();
+
+    var parser = ini.parse(std.testing.allocator, file.reader());
+    defer parser.deinit();
+
+    var writer = std.io.getStdOut().writer();
+
+    while (try parser.next()) |record| {
+        switch (record) {
+            .section => |heading| try writer.print("[{s}]\n", .{heading}),
+            .property => |kv| try writer.print("{s} = {s}\n", .{ kv.key, kv.value }),
+            .enumeration => |value| try writer.print("{s}\n", .{value}),
+        }
+    }
+}
+```
+
+### C
+
+```c
+#include <ini.h>
+
+#include <stdio.h>
+#include <stdbool.h>
+
+int main() {
+  FILE * f = fopen("example.ini", "rb");
+  if(!f)
+    return 1;
+  
+  struct ini_Parser parser;
+  ini_create_file(&parser, f);
+
+  struct ini_Record record;
+  while(true)
+  {
+    enum ini_Error error = ini_next(&parser, &record);
+    if(error != INI_SUCCESS)
+      goto cleanup;
+    
+    switch(record.type) {
+      case INI_RECORD_NUL: goto done;
+      case INI_RECORD_SECTION:
+        printf("[%s]\n", record.section);
+        break;
+      case INI_RECORD_PROPERTY:
+        printf("%s = %s\n", record.property.key, record.property.value);
+        break;
+      case INI_RECORD_ENUMERATION:
+        printf("%s\n", record.enumeration);
+        break;
+    }
+
+  }
+done:
+
+cleanup:
+  ini_destroy(&parser);
+  fclose(f);
+  return 0;
+}
+```

lib/ini/build.zig

@@ -0,0 +1,73 @@
+const std = @import("std");
+
+pub fn build(b: *std.Build) void {
+    const optimize = b.standardOptimizeOption(.{});
+    const target = b.standardTargetOptions(.{});
+
+    _ = b.addModule("ini", .{
+        .root_source_file = .{
+            .path = "src/ini.zig",
+        },
+    });
+
+    const lib = b.addStaticLibrary(.{
+        .name = "ini",
+        .root_source_file = .{ .path = "src/lib.zig" },
+        .target = target,
+        .optimize = optimize,
+    });
+
+    lib.bundle_compiler_rt = true;
+    lib.addIncludePath(.{ .path = "src" });
+    lib.linkLibC();
+
+    b.installArtifact(lib);
+
+    const example_c = b.addExecutable(.{
+        .name = "example-c",
+        .optimize = optimize,
+        .target = target,
+    });
+    example_c.addCSourceFile(.{
+        .file = .{
+            .path = "example/example.c",
+        },
+        .flags = &.{
+            "-Wall",
+            "-Wextra",
+            "-pedantic",
+        },
+    });
+    example_c.addIncludePath(.{ .path = "src" });
+    example_c.linkLibrary(lib);
+    example_c.linkLibC();
+
+    b.installArtifact(example_c);
+
+    const example_zig = b.addExecutable(.{
+        .name = "example-zig",
+        .root_source_file = .{ .path = "example/example.zig" },
+        .optimize = optimize,
+        .target = target,
+    });
+    example_zig.root_module.addImport("ini", b.modules.get("ini").?);
+
+    b.installArtifact(example_zig);
+
+    var main_tests = b.addTest(.{
+        .root_source_file = .{ .path = "src/test.zig" },
+        .optimize = optimize,
+    });
+
+    var binding_tests = b.addTest(.{
+        .root_source_file = .{ .path = "src/lib-test.zig" },
+        .optimize = optimize,
+    });
+    binding_tests.addIncludePath(.{ .path = "src" });
+    binding_tests.linkLibrary(lib);
+    binding_tests.linkLibC();
+
+    const test_step = b.step("test", "Run library tests");
+    test_step.dependOn(&main_tests.step);
+    test_step.dependOn(&binding_tests.step);
+}

lib/ini/build.zig.zon

@@ -0,0 +1,10 @@
+.{
+    .name = "libini",
+    .version = "0.0.0",
+    .dependencies = .{},
+    .paths = .{
+        "build.zig",
+        "build.zig.zon",
+        "src",
+    },
+}

lib/ini/example/example.c

@@ -0,0 +1,41 @@
+#include <ini.h>
+
+#include <stdio.h>
+#include <stdbool.h>
+
+int main() {
+  FILE * f = fopen("example.ini", "rb");
+  if(!f)
+    return 1;
+  
+  struct ini_Parser parser;
+  ini_create_file(&parser, f);
+
+  struct ini_Record record;
+  while(true)
+  {
+    enum ini_Error error = ini_next(&parser, &record);
+    if(error != INI_SUCCESS)
+      goto cleanup;
+    
+    switch(record.type) {
+      case INI_RECORD_NUL: goto done;
+      case INI_RECORD_SECTION:
+        printf("[%s]\n", record.section);
+        break;
+      case INI_RECORD_PROPERTY:
+        printf("%s = %s\n", record.property.key, record.property.value);
+        break;
+      case INI_RECORD_ENUMERATION:
+        printf("%s\n", record.enumeration);
+        break;
+    }
+
+  }
+done:
+
+cleanup:
+  ini_destroy(&parser);
+  fclose(f);
+  return 0;
+}

lib/ini/example/example.ini

@@ -0,0 +1,9 @@
+[Meta]
+author = xq
+library = ini
+
+[Albums]
+Thriller
+Back in Black
+Bat Out of Hell
+The Dark Side of the Moon

lib/ini/example/example.zig

@@ -0,0 +1,22 @@
+const std = @import("std");
+const ini = @import("ini");
+
+pub fn main() !void {
+    const file = try std.fs.cwd().openFile("example.ini", .{});
+    defer file.close();
+
+    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
+    defer if (gpa.deinit() != .ok) @panic("memory leaked");
+    var parser = ini.parse(gpa.allocator(), file.reader());
+    defer parser.deinit();
+
+    var writer = std.io.getStdOut().writer();
+
+    while (try parser.next()) |record| {
+        switch (record) {
+            .section => |heading| try writer.print("[{s}]\n", .{heading}),
+            .property => |kv| try writer.print("{s} = {s}\n", .{ kv.key, kv.value }),
+            .enumeration => |value| try writer.print("{s}\n", .{value}),
+        }
+    }
+}

lib/ini/src/ini.h

@@ -0,0 +1,64 @@
+#ifndef ZIG_INI_H
+#define ZIG_INI_H
+
+#include <stddef.h>
+#include <stdio.h>
+#include <stdalign.h>
+
+/// Opaque parser type. Consider the bytes in this struct
+/// as "implementation defined".
+/// This must also be fixed memory and must not be copied
+/// after being initialized with `ini_create_*`!
+struct ini_Parser
+{
+  alignas(16) char opaque[128];
+};
+
+enum ini_RecordType : int
+{
+  INI_RECORD_NUL = 0,
+  INI_RECORD_SECTION = 1,
+  INI_RECORD_PROPERTY = 2,
+  INI_RECORD_ENUMERATION = 3,
+};
+
+struct ini_KeyValuePair
+{
+    char const * key;
+    char const * value;
+};
+
+struct ini_Record
+{
+  enum ini_RecordType type;
+  union {
+    char const * section;
+    struct ini_KeyValuePair property;
+    char const * enumeration;
+  };
+};
+
+enum ini_Error
+{
+  INI_SUCCESS = 0,
+  INI_ERR_OUT_OF_MEMORY = 1,
+  INI_ERR_IO = 2,
+  INI_ERR_INVALID_DATA = 3,
+};
+
+extern void ini_create_buffer(
+  struct ini_Parser  * parser,
+  char const * data,
+  size_t length
+);
+
+extern void ini_create_file(
+  struct ini_Parser  * parser,
+  FILE * file
+);
+
+extern void ini_destroy(struct ini_Parser  * parser);
+
+extern enum ini_Error ini_next(struct ini_Parser * parser, struct ini_Record * record);
+
+#endif

lib/ini/src/ini.zig

@@ -0,0 +1,93 @@
+const std = @import("std");
+
+/// An entry in a ini file. Each line that contains non-whitespace text can
+/// be categorized into a record type.
+pub const Record = union(enum) {
+    /// A section heading enclosed in `[` and `]`. The brackets are not included.
+    section: [:0]const u8,
+
+    /// A line that contains a key-value pair separated by `=`.
+    /// Both key and value have the excess whitespace trimmed.
+    /// Both key and value allow escaping with C string syntax.
+    property: KeyValue,
+
+    /// A line that is either escaped as a C string or contains no `=`
+    enumeration: [:0]const u8,
+};
+
+pub const KeyValue = struct {
+    key: [:0]const u8,
+    value: [:0]const u8,
+};
+
+const whitespace = " \r\t\x00";
+
+/// WARNING:
+/// This function is not a general purpose function but
+/// requires to be executed on slices of the line_buffer *after*
+/// the NUL terminator appendix.
+/// This function will override the character after the slice end,
+/// so make sure there is one available!
+fn insertNulTerminator(slice: []const u8) [:0]const u8 {
+    const mut_ptr = @as([*]u8, @ptrFromInt(@intFromPtr(slice.ptr)));
+    mut_ptr[slice.len] = 0;
+    return mut_ptr[0..slice.len :0];
+}
+
+pub fn Parser(comptime Reader: type) type {
+    return struct {
+        const Self = @This();
+
+        line_buffer: std.ArrayList(u8),
+        reader: Reader,
+
+        pub fn deinit(self: *Self) void {
+            self.line_buffer.deinit();
+            self.* = undefined;
+        }
+
+        pub fn next(self: *Self) !?Record {
+            while (true) {
+                self.reader.readUntilDelimiterArrayList(&self.line_buffer, '\n', 4096) catch |err| switch (err) {
+                    error.EndOfStream => {
+                        if (self.line_buffer.items.len == 0)
+                            return null;
+                    },
+                    else => |e| return e,
+                };
+                try self.line_buffer.append(0); // append guaranteed space for sentinel
+
+                const line = if (std.mem.indexOfAny(u8, self.line_buffer.items, ";#")) |index|
+                    std.mem.trim(u8, self.line_buffer.items[0..index], whitespace)
+                else
+                    std.mem.trim(u8, self.line_buffer.items, whitespace);
+                if (line.len == 0)
+                    continue;
+
+                if (std.mem.startsWith(u8, line, "[") and std.mem.endsWith(u8, line, "]")) {
+                    return Record{ .section = insertNulTerminator(line[1 .. line.len - 1]) };
+                }
+
+                if (std.mem.indexOfScalar(u8, line, '=')) |index| {
+                    return Record{
+                        .property = KeyValue{
+                            // note: the key *might* replace the '=' in the slice with 0!
+                            .key = insertNulTerminator(std.mem.trim(u8, line[0..index], whitespace)),
+                            .value = insertNulTerminator(std.mem.trim(u8, line[index + 1 ..], whitespace)),
+                        },
+                    };
+                }
+
+                return Record{ .enumeration = insertNulTerminator(line) };
+            }
+        }
+    };
+}
+
+/// Returns a new parser that can read the ini structure
+pub fn parse(allocator: std.mem.Allocator, reader: anytype) Parser(@TypeOf(reader)) {
+    return Parser(@TypeOf(reader)){
+        .line_buffer = std.ArrayList(u8).init(allocator),
+        .reader = reader,
+    };
+}

lib/ini/src/lib-test.zig

@@ -0,0 +1,89 @@
+const std = @import("std");
+
+const c = @cImport({
+    @cInclude("ini.h");
+});
+
+test "parser create/destroy" {
+    var buffer: c.ini_Parser = undefined;
+    c.ini_create_buffer(&buffer, "", 0);
+    c.ini_destroy(&buffer);
+}
+
+fn expectNull(record: c.ini_Record) !void {
+    try std.testing.expectEqual(c.INI_RECORD_NUL, record.type);
+}
+
+fn expectSection(heading: []const u8, record: c.ini_Record) !void {
+    try std.testing.expectEqual(c.INI_RECORD_SECTION, record.type);
+    try std.testing.expectEqualStrings(heading, std.mem.span(record.unnamed_0.section));
+}
+
+fn expectKeyValue(key: []const u8, value: []const u8, record: c.ini_Record) !void {
+    try std.testing.expectEqual(c.INI_RECORD_PROPERTY, record.type);
+    try std.testing.expectEqualStrings(key, std.mem.span(record.unnamed_0.property.key));
+    try std.testing.expectEqualStrings(value, std.mem.span(record.unnamed_0.property.value));
+}
+
+fn expectEnumeration(enumeration: []const u8, record: c.ini_Record) !void {
+    try std.testing.expectEqual(c.INI_RECORD_ENUMERATION, record.type);
+    try std.testing.expectEqualStrings(enumeration, std.mem.span(record.unnamed_0.enumeration));
+}
+
+fn parseNext(parser: *c.ini_Parser) !c.ini_Record {
+    var record: c.ini_Record = undefined;
+    const err = c.ini_next(parser, &record);
+    switch (err) {
+        c.INI_SUCCESS => return record,
+        c.INI_ERR_OUT_OF_MEMORY => return error.OutOfMemory,
+        c.INI_ERR_IO => return error.InputOutput,
+        c.INI_ERR_INVALID_DATA => return error.InvalidData,
+        else => unreachable,
+    }
+}
+
+fn commonTest(parser: *c.ini_Parser) !void {
+    try expectSection("Meta", try parseNext(parser));
+    try expectKeyValue("author", "xq", try parseNext(parser));
+    try expectKeyValue("library", "ini", try parseNext(parser));
+
+    try expectSection("Albums", try parseNext(parser));
+
+    try expectEnumeration("Thriller", try parseNext(parser));
+    try expectEnumeration("Back in Black", try parseNext(parser));
+    try expectEnumeration("Bat Out of Hell", try parseNext(parser));
+    try expectEnumeration("The Dark Side of the Moon", try parseNext(parser));
+
+    try expectNull(try parseNext(parser));
+}
+
+test "buffer parser" {
+    const slice =
+        \\[Meta]
+        \\author = xq
+        \\library = ini
+        \\
+        \\[Albums]
+        \\Thriller
+        \\Back in Black
+        \\Bat Out of Hell
+        \\The Dark Side of the Moon
+    ;
+
+    var parser: c.ini_Parser = undefined;
+    c.ini_create_buffer(&parser, slice, slice.len);
+    defer c.ini_destroy(&parser);
+
+    try commonTest(&parser);
+}
+
+test "file parser" {
+    const file = c.fopen("example/example.ini", "rb") orelse unreachable;
+    defer _ = c.fclose(file);
+
+    var parser: c.ini_Parser = undefined;
+    c.ini_create_file(&parser, file);
+    defer c.ini_destroy(&parser);
+
+    try commonTest(&parser);
+}

lib/ini/src/lib.zig

@@ -0,0 +1,158 @@
+const std = @import("std");
+const ini = @import("ini.zig");
+
+const c = @cImport({
+    @cInclude("ini.h");
+});
+
+const Record = extern struct {
+    type: Type,
+    value: Data,
+
+    const Type = enum(c.ini_RecordType) {
+        nul = 0,
+        section = 1,
+        property = 2,
+        enumeration = 3,
+    };
+
+    const Data = extern union {
+        section: [*:0]const u8,
+        property: KeyValuePair,
+        enumeration: [*:0]const u8,
+    };
+
+    const KeyValuePair = extern struct {
+        key: [*:0]const u8,
+        value: [*:0]const u8,
+    };
+};
+
+const BufferParser = struct {
+    stream: std.io.FixedBufferStream([]const u8),
+    parser: ini.Parser(std.io.FixedBufferStream([]const u8).Reader),
+};
+
+const IniParser = union(enum) {
+    buffer: BufferParser,
+    file: ini.Parser(CReader),
+};
+
+const IniError = enum(c.ini_Error) {
+    success = 0,
+    out_of_memory = 1,
+    io = 2,
+    invalid_data = 3,
+};
+
+comptime {
+    if (@sizeOf(c.ini_Parser) < @sizeOf(IniParser))
+        @compileError(std.fmt.comptimePrint("ini_Parser struct in header is too small. Please set the char array to at least {d} chars!", .{@sizeOf(IniParser)}));
+    if (@alignOf(c.ini_Parser) < @alignOf(IniParser))
+        @compileError("align mismatch: ini_Parser struct does not match IniParser");
+
+    if (@sizeOf(c.ini_Record) != @sizeOf(Record))
+        @compileError("size mismatch: ini_Record struct does not match Record!");
+    if (@alignOf(c.ini_Record) != @alignOf(Record))
+        @compileError("align mismatch: ini_Record struct does not match Record!");
+
+    if (@sizeOf(c.ini_KeyValuePair) != @sizeOf(Record.KeyValuePair))
+        @compileError("size mismatch: ini_KeyValuePair struct does not match Record.KeyValuePair!");
+    if (@alignOf(c.ini_KeyValuePair) != @alignOf(Record.KeyValuePair))
+        @compileError("align mismatch: ini_KeyValuePair struct does not match Record.KeyValuePair!");
+}
+
+export fn ini_create_buffer(parser: *IniParser, data: [*]const u8, length: usize) void {
+    parser.* = IniParser{
+        .buffer = .{
+            .stream = std.io.fixedBufferStream(data[0..length]),
+            .parser = undefined,
+        },
+    };
+    // this is required to have the parser store a pointer to the stream.
+    parser.buffer.parser = ini.parse(std.heap.c_allocator, parser.buffer.stream.reader());
+}
+
+export fn ini_create_file(parser: *IniParser, file: *std.c.FILE) void {
+    parser.* = IniParser{
+        .file = ini.parse(std.heap.c_allocator, cReader(file)),
+    };
+}
+
+export fn ini_destroy(parser: *IniParser) void {
+    switch (parser.*) {
+        .buffer => |*p| p.parser.deinit(),
+        .file => |*p| p.deinit(),
+    }
+    parser.* = undefined;
+}
+
+const ParseError = error{ OutOfMemory, StreamTooLong } || CReader.Error;
+
+fn mapError(err: ParseError) IniError {
+    return switch (err) {
+        error.OutOfMemory => IniError.out_of_memory,
+        error.StreamTooLong => IniError.invalid_data,
+        else => IniError.io,
+    };
+}
+
+export fn ini_next(parser: *IniParser, record: *Record) IniError {
+    const src_record_or_null: ?ini.Record = switch (parser.*) {
+        .buffer => |*p| p.parser.next() catch |e| return mapError(e),
+        .file => |*p| p.next() catch |e| return mapError(e),
+    };
+
+    if (src_record_or_null) |src_record| {
+        record.* = switch (src_record) {
+            .section => |heading| Record{
+                .type = .section,
+                .value = .{ .section = heading.ptr },
+            },
+            .enumeration => |enumeration| Record{
+                .type = .enumeration,
+                .value = .{ .enumeration = enumeration.ptr },
+            },
+            .property => |property| Record{
+                .type = .property,
+                .value = .{ .property = .{
+                    .key = property.key.ptr,
+                    .value = property.value.ptr,
+                } },
+            },
+        };
+    } else {
+        record.* = Record{
+            .type = .nul,
+            .value = undefined,
+        };
+    }
+
+    return .success;
+}
+
+const CReader = std.io.Reader(*std.c.FILE, std.fs.File.ReadError, cReaderRead);
+
+fn cReader(c_file: *std.c.FILE) CReader {
+    return .{ .context = c_file };
+}
+
+fn cReaderRead(c_file: *std.c.FILE, bytes: []u8) std.fs.File.ReadError!usize {
+    const amt_read = std.c.fread(bytes.ptr, 1, bytes.len, c_file);
+    if (amt_read >= 0) return amt_read;
+    switch (@as(std.os.E, @enumFromInt(std.c._errno().*))) {
+        .SUCCESS => unreachable,
+        .INVAL => unreachable,
+        .FAULT => unreachable,
+        .AGAIN => unreachable, // this is a blocking API
+        .BADF => unreachable, // always a race condition
+        .DESTADDRREQ => unreachable, // connect was never called
+        .DQUOT => return error.DiskQuota,
+        .FBIG => return error.FileTooBig,
+        .IO => return error.InputOutput,
+        .NOSPC => return error.NoSpaceLeft,
+        .PERM => return error.AccessDenied,
+        .PIPE => return error.BrokenPipe,
+        else => |err| return std.os.unexpectedErrno(err),
+    }
+}

lib/ini/src/test.zig

@@ -0,0 +1,183 @@
+const std = @import("std");
+
+const ini = @import("ini.zig");
+const parse = ini.parse;
+const Record = ini.Record;
+
+fn expectNull(record: ?Record) !void {
+    try std.testing.expectEqual(@as(?Record, null), record);
+}
+
+fn expectSection(heading: []const u8, record: ?Record) !void {
+    try std.testing.expectEqualStrings(heading, record.?.section);
+}
+
+fn expectKeyValue(key: []const u8, value: []const u8, record: ?Record) !void {
+    try std.testing.expectEqualStrings(key, record.?.property.key);
+    try std.testing.expectEqualStrings(value, record.?.property.value);
+}
+
+fn expectEnumeration(enumeration: []const u8, record: ?Record) !void {
+    try std.testing.expectEqualStrings(enumeration, record.?.enumeration);
+}
+
+test "empty file" {
+    var stream = std.io.fixedBufferStream("");
+    var parser = parse(std.testing.allocator, stream.reader());
+    defer parser.deinit();
+
+    try expectNull(try parser.next());
+    try expectNull(try parser.next());
+    try expectNull(try parser.next());
+    try expectNull(try parser.next());
+}
+
+test "section" {
+    var stream = std.io.fixedBufferStream("[Hello]");
+    var parser = parse(std.testing.allocator, stream.reader());
+    defer parser.deinit();
+
+    try expectSection("Hello", try parser.next());
+    try expectNull(try parser.next());
+}
+
+test "key-value-pair" {
+    for (&[_][]const u8{
+        "key=value",
+        "  key=value",
+        "key=value  ",
+        "  key=value  ",
+        "key  =value",
+        "  key  =value",
+        "key  =value  ",
+        "  key  =value  ",
+        "key=  value",
+        "  key=  value",
+        "key=  value  ",
+        "  key=  value  ",
+        "key  =  value",
+        "  key  =  value",
+        "key  =  value  ",
+        "  key  =  value  ",
+    }) |pattern| {
+        var stream = std.io.fixedBufferStream(pattern);
+        var parser = parse(std.testing.allocator, stream.reader());
+        defer parser.deinit();
+
+        try expectKeyValue("key", "value", try parser.next());
+        try expectNull(try parser.next());
+    }
+}
+
+test "enumeration" {
+    var stream = std.io.fixedBufferStream("enum");
+    var parser = parse(std.testing.allocator, stream.reader());
+    defer parser.deinit();
+
+    try expectEnumeration("enum", try parser.next());
+    try expectNull(try parser.next());
+}
+
+test "empty line skipping" {
+    var stream = std.io.fixedBufferStream("item a\r\n\r\n\r\nitem b");
+    var parser = parse(std.testing.allocator, stream.reader());
+    defer parser.deinit();
+
+    try expectEnumeration("item a", try parser.next());
+    try expectEnumeration("item b", try parser.next());
+    try expectNull(try parser.next());
+}
+
+test "multiple sections" {
+    var stream = std.io.fixedBufferStream("  [Hello] \r\n[Foo Bar]\n[Hello!]\n");
+    var parser = parse(std.testing.allocator, stream.reader());
+    defer parser.deinit();
+
+    try expectSection("Hello", try parser.next());
+    try expectSection("Foo Bar", try parser.next());
+    try expectSection("Hello!", try parser.next());
+    try expectNull(try parser.next());
+}
+
+test "multiple properties" {
+    var stream = std.io.fixedBufferStream("a = b\r\nc =\r\nkey value = core property");
+    var parser = parse(std.testing.allocator, stream.reader());
+    defer parser.deinit();
+
+    try expectKeyValue("a", "b", try parser.next());
+    try expectKeyValue("c", "", try parser.next());
+    try expectKeyValue("key value", "core property", try parser.next());
+    try expectNull(try parser.next());
+}
+
+test "multiple enumeration" {
+    var stream = std.io.fixedBufferStream(" a  \n b  \r\n c  ");
+    var parser = parse(std.testing.allocator, stream.reader());
+    defer parser.deinit();
+
+    try expectEnumeration("a", try parser.next());
+    try expectEnumeration("b", try parser.next());
+    try expectEnumeration("c", try parser.next());
+    try expectNull(try parser.next());
+}
+
+test "mixed data" {
+    var stream = std.io.fixedBufferStream(
+        \\[Meta]
+        \\author = xq
+        \\library = ini
+        \\
+        \\[Albums]
+        \\Thriller
+        \\Back in Black
+        \\Bat Out of Hell
+        \\The Dark Side of the Moon
+    );
+    var parser = parse(std.testing.allocator, stream.reader());
+    defer parser.deinit();
+
+    try expectSection("Meta", try parser.next());
+    try expectKeyValue("author", "xq", try parser.next());
+    try expectKeyValue("library", "ini", try parser.next());
+
+    try expectSection("Albums", try parser.next());
+
+    try expectEnumeration("Thriller", try parser.next());
+    try expectEnumeration("Back in Black", try parser.next());
+    try expectEnumeration("Bat Out of Hell", try parser.next());
+    try expectEnumeration("The Dark Side of the Moon", try parser.next());
+
+    try expectNull(try parser.next());
+}
+
+test "# comments" {
+    var stream = std.io.fixedBufferStream(
+        \\[section] # comment
+        \\key = value # comment
+        \\enum # comment
+    );
+    var parser = parse(std.testing.allocator, stream.reader());
+    defer parser.deinit();
+
+    try expectSection("section", try parser.next());
+    try expectKeyValue("key", "value", try parser.next());
+    try expectEnumeration("enum", try parser.next());
+
+    try expectNull(try parser.next());
+}
+
+test "; comments" {
+    var stream = std.io.fixedBufferStream(
+        \\[section] ; comment
+        \\key = value ; comment
+        \\enum ; comment
+    );
+    var parser = parse(std.testing.allocator, stream.reader());
+    defer parser.deinit();
+
+    try expectSection("section", try parser.next());
+    try expectKeyValue("key", "value", try parser.next());
+    try expectEnumeration("enum", try parser.next());
+
+    try expectNull(try parser.next());
+}

lib/lv_drivers/.gitignore

@@ -1,2 +1,3 @@
 **/*.o
-**/*.d
+**/*.d
+build/*

lib/lv_drivers/CMakeLists.txt

@@ -20,6 +20,7 @@ target_include_directories(lv_drivers SYSTEM PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
 
 find_package(PkgConfig)
 pkg_check_modules(PKG_WAYLAND wayland-client wayland-cursor wayland-protocols xkbcommon)
+pkg_check_modules(PKG_LVGL lvgl)
 target_link_libraries(lv_drivers PUBLIC lvgl ${PKG_WAYLAND_LIBRARIES})
 
 if("${LIB_INSTALL_DIR}" STREQUAL "")
@@ -38,7 +39,16 @@ install(
   PATTERN ".git*" EXCLUDE
   PATTERN "CMakeFiles" EXCLUDE
   PATTERN "docs" EXCLUDE
-  PATTERN "lib" EXCLUDE)
+  PATTERN "lib" EXCLUDE
+  PATTERN "*.pc.in" EXCLUDE)
+
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${PKG_LVGL_CFLAGS}")
+
+configure_file("${CMAKE_SOURCE_DIR}/lv-drivers.pc.in" lv-drivers.pc @ONLY)
+
+install(
+  FILES "${CMAKE_BINARY_DIR}/lv-drivers.pc"
+  DESTINATION "${LIB_INSTALL_DIR}/pkgconfig/")
 
 file(GLOB LV_DRIVERS_PUBLIC_HEADERS "${CMAKE_SOURCE_DIR}/lv_drv_conf.h")
 

lib/lv_drivers/README.md

@@ -1,6 +1,6 @@
 # Display and Touch pad drivers
 
-Display controller and touchpad driver to can be directly used with [LittlevGL](https://littlevgl.com).
+Display controller and touchpad driver to can be directly used with [LVGL](https://lvgl.io/).
 
 To learn more about using drivers in LittlevGL visit the [Porting guide](https://docs.lvgl.io/latest/en/html/porting/index.html).
 

lib/lv_drivers/display/drm.c

@@ -9,19 +9,14 @@
 #include "drm.h"
 #if USE_DRM
 
-#include <unistd.h>
-#include <pthread.h>
-#include <time.h>
-#include <sys/time.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <poll.h>
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <errno.h>
 #include <sys/mman.h>
-#include <inttypes.h>
+#include <unistd.h>
 
 #include <xf86drm.h>
 #include <xf86drmMode.h>
@@ -41,7 +36,7 @@ struct drm_buffer {
 	uint32_t pitch;
 	uint32_t offset;
 	unsigned long int size;
-	void * map;
+	uint8_t * map;
 	uint32_t fb_handle;
 };
 
@@ -65,8 +60,9 @@ struct drm_dev {
 	drmModePropertyPtr plane_props[128];
 	drmModePropertyPtr crtc_props[128];
 	drmModePropertyPtr conn_props[128];
-	struct drm_buffer drm_bufs[2]; /* DUMB buffers */
-	struct drm_buffer *cur_bufs[2]; /* double buffering handling */
+	struct drm_buffer drm_bufs[2]; /*DUMB buffers*/
+	uint8_t active_drm_buf_idx; /*Double buffering handling*/
+	lv_disp_draw_buf_t draw_buf;
 } drm_dev;
 
 static uint32_t get_plane_property_id(const char *name)
@@ -117,7 +113,18 @@ static uint32_t get_conn_property_id(const char *name)
 static void page_flip_handler(int fd, unsigned int sequence, unsigned int tv_sec,
 			      unsigned int tv_usec, void *user_data)
 {
+	LV_UNUSED(fd);
+	LV_UNUSED(sequence);
+	LV_UNUSED(tv_sec);
+	LV_UNUSED(tv_usec);
+	LV_UNUSED(user_data);
+
 	dbg("flip");
+
+	if(drm_dev.req) {
+		drmModeAtomicFree(drm_dev.req);
+		drm_dev.req = NULL;
+	}
 }
 
 static int drm_get_plane_props(void)
@@ -244,7 +251,7 @@ static int drm_dmabuf_set_plane(struct drm_buffer *buf)
 {
 	int ret;
 	static int first = 1;
-	uint32_t flags = DRM_MODE_PAGE_FLIP_EVENT;
+	uint32_t flags = DRM_MODE_PAGE_FLIP_EVENT | DRM_MODE_ATOMIC_NONBLOCK;
 
 	drm_dev.req = drmModeAtomicAlloc();
 
@@ -283,6 +290,7 @@ static int drm_dmabuf_set_plane(struct drm_buffer *buf)
 
 static int find_plane(unsigned int fourcc, uint32_t *plane_id, uint32_t crtc_id, uint32_t crtc_idx)
 {
+	LV_UNUSED(crtc_id);
 	drmModePlaneResPtr planes;
 	drmModePlanePtr plane;
 	unsigned int i;
@@ -393,7 +401,7 @@ static int drm_find_connector(void)
 	drm_dev.mmWidth = conn->mmWidth;
 	drm_dev.mmHeight = conn->mmHeight;
 
-	memcpy(&drm_dev.mode, &conn->modes[0], sizeof(drmModeModeInfo));
+	lv_memcpy(&drm_dev.mode, &conn->modes[0], sizeof(drmModeModeInfo));
 
 	if (drmModeCreatePropertyBlob(drm_dev.fd, &drm_dev.mode, sizeof(drm_dev.mode),
 				      &drm_dev.blob_id)) {
@@ -464,7 +472,7 @@ static int drm_find_connector(void)
 		drmModeFreeEncoder(enc);
 	}
 
-	drm_dev.crtc_idx = -1;
+	drm_dev.crtc_idx = UINT32_MAX;
 
 	for (i = 0; i < res->count_crtcs; ++i) {
 		if (drm_dev.crtc_id == res->crtcs[i]) {
@@ -473,7 +481,7 @@ static int drm_find_connector(void)
 		}
 	}
 
-	if (drm_dev.crtc_idx == -1) {
+	if (drm_dev.crtc_idx == UINT32_MAX) {
 		err("drm: CRTC not found");
 		goto free_res;
 	}
@@ -614,7 +622,7 @@ static int drm_allocate_dumb(struct drm_buffer *buf)
 	int ret;
 
 	/* create dumb buffer */
-	memset(&creq, 0, sizeof(creq));
+	lv_memset(&creq, 0, sizeof(creq));
 	creq.width = drm_dev.width;
 	creq.height = drm_dev.height;
 	creq.bpp = LV_COLOR_DEPTH;
@@ -626,12 +634,10 @@ static int drm_allocate_dumb(struct drm_buffer *buf)
 
 	buf->handle = creq.handle;
 	buf->pitch = creq.pitch;
-	dbg("pitch %d", buf->pitch);
 	buf->size = creq.size;
-	dbg("size %d", buf->size);
 
 	/* prepare buffer for memory mapping */
-	memset(&mreq, 0, sizeof(mreq));
+	lv_memset(&mreq, 0, sizeof(mreq));
 	mreq.handle = creq.handle;
 	ret = drmIoctl(drm_dev.fd, DRM_IOCTL_MODE_MAP_DUMB, &mreq);
 	if (ret) {
@@ -640,6 +646,7 @@ static int drm_allocate_dumb(struct drm_buffer *buf)
 	}
 
 	buf->offset = mreq.offset;
+	info("size %lu pitch %u offset %u", buf->size, buf->pitch, buf->offset);
 
 	/* perform actual memory mapping */
 	buf->map = mmap(0, creq.size, PROT_READ | PROT_WRITE, MAP_SHARED, drm_dev.fd, mreq.offset);
@@ -649,7 +656,7 @@ static int drm_allocate_dumb(struct drm_buffer *buf)
 	}
 
 	/* clear the framebuffer to 0 (= full transparency in ARGB8888) */
-	memset(buf->map, 0, creq.size);
+	lv_memset(buf->map, 0, creq.size);
 
 	/* create framebuffer object for the dumb-buffer */
 	handles[0] = creq.handle;
@@ -669,7 +676,7 @@ static int drm_setup_buffers(void)
 {
 	int ret;
 
-	/* Allocate DUMB buffers */
+	/*Allocate DUMB buffers*/
 	ret = drm_allocate_dumb(&drm_dev.drm_bufs[0]);
 	if (ret)
 		return ret;
@@ -678,80 +685,61 @@ static int drm_setup_buffers(void)
 	if (ret)
 		return ret;
 
-	/* Set buffering handling */
-	drm_dev.cur_bufs[0] = NULL;
-	drm_dev.cur_bufs[1] = &drm_dev.drm_bufs[0];
-
 	return 0;
 }
 
-void drm_wait_vsync(lv_disp_drv_t *disp_drv)
+void drm_wait_vsync(lv_disp_drv_t * disp_drv)
 {
-	int ret;
-	fd_set fds;
-	FD_ZERO(&fds);
-	FD_SET(drm_dev.fd, &fds);
-
-	do {
-		ret = select(drm_dev.fd + 1, &fds, NULL, NULL, NULL);
-	} while (ret == -1 && errno == EINTR);
-
-	if (ret < 0) {
-		err("select failed: %s", strerror(errno));
-		drmModeAtomicFree(drm_dev.req);
-		drm_dev.req = NULL;
-		return;
+	while(drm_dev.req) {
+		struct pollfd pfd;
+		pfd.fd = drm_dev.fd;
+		pfd.events = POLLIN;
+
+		int ret;
+		do {
+			ret = poll(&pfd, 1, -1);
+		} while (ret == -1 && errno == EINTR);
+
+		if(ret > 0)
+			drmHandleEvent(drm_dev.fd, &drm_dev.drm_event_ctx);
+		else {
+			err("poll failed: %s", strerror(errno));
+			return;
+		}
 	}
 
-	if (FD_ISSET(drm_dev.fd, &fds))
-		drmHandleEvent(drm_dev.fd, &drm_dev.drm_event_ctx);
-
-	drmModeAtomicFree(drm_dev.req);
-	drm_dev.req = NULL;
+	lv_disp_flush_ready(disp_drv);
 }
 
-void drm_flush(lv_disp_drv_t *disp_drv, const lv_area_t *area, lv_color_t *color_p)
+void drm_flush(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_color_t * color_p)
 {
-	struct drm_buffer *fbuf = drm_dev.cur_bufs[1];
-	lv_coord_t w = (area->x2 - area->x1 + 1);
-	lv_coord_t h = (area->y2 - area->y1 + 1);
-	int i, y;
-
-	dbg("x %d:%d y %d:%d w %d h %d", area->x1, area->x2, area->y1, area->y2, w, h);
-
-	/* Partial update */
-	if ((w != drm_dev.width || h != drm_dev.height) && drm_dev.cur_bufs[0])
-		memcpy(fbuf->map, drm_dev.cur_bufs[0]->map, fbuf->size);
-
-	for (y = 0, i = area->y1 ; i <= area->y2 ; ++i, ++y) {
-                memcpy((uint8_t *)fbuf->map + (area->x1 * (LV_COLOR_SIZE/8)) + (fbuf->pitch * i),
-                       (uint8_t *)color_p + (w * (LV_COLOR_SIZE/8) * y),
-		       w * (LV_COLOR_SIZE/8));
+	struct drm_buffer *fbuf = &drm_dev.drm_bufs[drm_dev.active_drm_buf_idx ^ 1];
+
+	if(!disp_drv->direct_mode) {
+		/*Backwards compatibility: Non-direct flush */
+		uint32_t w = (area->x2 - area->x1) + 1;
+		for (int y = 0, i = area->y1; i <= area->y2 ; ++i, ++y) {
+			lv_memcpy(fbuf->map + (area->x1 * (LV_COLOR_SIZE / 8)) + (fbuf->pitch * i),
+			          (uint8_t *)color_p + (w * (LV_COLOR_SIZE / 8) * y),
+			          w * (LV_COLOR_SIZE / 8));
+		}
 	}
 
-	if (drm_dev.req)
-		drm_wait_vsync(disp_drv);
+	if(lv_disp_flush_is_last(disp_drv)) {
+		/*Request buffer swap*/
+		if(drm_dmabuf_set_plane(fbuf)) {
+			err("Flush fail");
+			return;
+		}
+		else
+			dbg("Flush done");
 
-	/* show fbuf plane */
-	if (drm_dmabuf_set_plane(fbuf)) {
-		err("Flush fail");
-		return;
+		drm_dev.active_drm_buf_idx ^= 1;
 	}
-	else
-		dbg("Flush done");
-
-	if (!drm_dev.cur_bufs[0])
-		drm_dev.cur_bufs[1] = &drm_dev.drm_bufs[1];
-	else
-		drm_dev.cur_bufs[1] = drm_dev.cur_bufs[0];
-
-	drm_dev.cur_bufs[0] = fbuf;
-
-	lv_disp_flush_ready(disp_drv);
 }
 
 #if LV_COLOR_DEPTH == 32
-#define DRM_FOURCC DRM_FORMAT_ARGB8888
+#define DRM_FOURCC DRM_FORMAT_XRGB8888
 #elif LV_COLOR_DEPTH == 16
 #define DRM_FOURCC DRM_FORMAT_RGB565
 #else
@@ -770,7 +758,7 @@ void drm_get_sizes(lv_coord_t *width, lv_coord_t *height, uint32_t *dpi)
 		*dpi = DIV_ROUND_UP(drm_dev.width * 25400, drm_dev.mmWidth * 1000);
 }
 
-void drm_init(void)
+int drm_init(void)
 {
 	int ret;
 
@@ -778,7 +766,7 @@ void drm_init(void)
 	if (ret) {
 		close(drm_dev.fd);
 		drm_dev.fd = -1;
-		return;
+		return -1;
 	}
 
 	ret = drm_setup_buffers();
@@ -786,10 +774,28 @@ void drm_init(void)
 		err("DRM buffer allocation failed");
 		close(drm_dev.fd);
 		drm_dev.fd = -1;
-		return;
+		return -1;
 	}
 
 	info("DRM subsystem and buffer mapped successfully");
+	return 0;
+}
+
+int drm_disp_drv_init(lv_disp_drv_t * disp_drv)
+{
+	lv_disp_drv_init(disp_drv);
+
+	int ret = drm_init();
+	if(ret) return ret;
+
+	lv_disp_draw_buf_init(&drm_dev.draw_buf, drm_dev.drm_bufs[1].map, drm_dev.drm_bufs[0].map, drm_dev.width * drm_dev.height);
+	disp_drv->draw_buf = &drm_dev.draw_buf;
+	disp_drv->direct_mode = true;
+	disp_drv->hor_res = drm_dev.width;
+	disp_drv->ver_res = drm_dev.height;
+	disp_drv->flush_cb = drm_flush;
+	disp_drv->wait_cb = drm_wait_vsync;
+	return 0;
 }
 
 void drm_exit(void)

lib/lv_drivers/display/drm.h

@@ -40,13 +40,14 @@ extern "C" {
 /**********************
  * GLOBAL PROTOTYPES
  **********************/
-void drm_init(void);
-void drm_get_sizes(lv_coord_t *width, lv_coord_t *height, uint32_t *dpi);
+
+int drm_init(void); /*Deprecated: Use drm_disp_drv_init instead*/
+int drm_disp_drv_init(lv_disp_drv_t * disp_drv);
+void drm_get_sizes(lv_coord_t * width, lv_coord_t * height, uint32_t * dpi);
 void drm_exit(void);
 void drm_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * color_p);
 void drm_wait_vsync(lv_disp_drv_t * drv);
 
-
 /**********************
  *      MACROS
  **********************/

lib/lv_drivers/display/fbdev.c

@@ -101,7 +101,7 @@ void fbdev_init(void)
     // Make sure that the display is on.
     if (ioctl(fbfd, FBIOBLANK, FB_BLANK_UNBLANK) != 0) {
         perror("ioctl(FBIOBLANK)");
-        return;
+        // Don't return. Some framebuffer drivers like efifb or simplefb don't implement FBIOBLANK.
     }
 
 #if USE_BSD_FBDEV
@@ -195,8 +195,8 @@ void fbdev_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * color
     long int byte_location = 0;
     unsigned char bit_location = 0;
 
-    /*32 or 24 bit per pixel*/
-    if(vinfo.bits_per_pixel == 32 || vinfo.bits_per_pixel == 24) {
+    /*32 bit per pixel*/
+    if(vinfo.bits_per_pixel == 32) {
         uint32_t * fbp32 = (uint32_t *)fbp;
         int32_t y;
         for(y = act_y1; y <= act_y2; y++) {
@@ -205,6 +205,23 @@ void fbdev_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * color
             color_p += w;
         }
     }
+    /*24 bit per pixel*/
+    else if(vinfo.bits_per_pixel == 24 && LV_COLOR_DEPTH == 32) {
+        uint8_t * fbp8 = (uint8_t *)fbp;
+        lv_coord_t x;
+        int32_t y;
+        uint8_t *pixel;
+        for(y = act_y1; y <= act_y2; y++) {
+            location = (act_x1 + vinfo.xoffset) + (y + vinfo.yoffset) * finfo.line_length / 3;
+            for (x = 0; x < w; ++x) {
+                pixel = (uint8_t *)(&color_p[x]);
+                fbp8[3 * (location + x)] = pixel[0];
+                fbp8[3 * (location + x) + 1] = pixel[1];
+                fbp8[3 * (location + x) + 2] = pixel[2];
+            }
+            color_p += w;
+        }
+    }
     /*16 bit per pixel*/
     else if(vinfo.bits_per_pixel == 16) {
         uint16_t * fbp16 = (uint16_t *)fbp;

lib/lv_drivers/indev/XPT2046.c

@@ -55,9 +55,9 @@ void xpt2046_init(void)
 /**
  * Get the current position and state of the touchpad
  * @param data store the read data here
- * @return false: because no ore data to be read
+ * @return void
  */
-bool xpt2046_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data)
+void xpt2046_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data)
 {
     static int16_t last_x = 0;
     static int16_t last_y = 0;
@@ -105,7 +105,7 @@ bool xpt2046_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data)
     data->point.x = x;
     data->point.y = y;
 
-    return false;
+    data->continue_reading = false;    /* No more data to be read */
 }
 
 /**********************

lib/lv_drivers/indev/XPT2046.h

@@ -41,7 +41,7 @@ extern "C" {
  * GLOBAL PROTOTYPES
  **********************/
 void xpt2046_init(void);
-bool xpt2046_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data);
+void xpt2046_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data);
 
 /**********************
  *      MACROS

lib/lv_drivers/indev/evdev.c

@@ -12,6 +12,7 @@
 #include <stdio.h>
 #include <unistd.h>
 #include <fcntl.h>
+#include <errno.h>
 #if USE_BSD_EVDEV
 #include <dev/evdev/input.h>
 #else
@@ -22,230 +23,202 @@
 #include "xkb.h"
 #endif /* USE_XKB */
 
-/*********************
- *      DEFINES
- *********************/
-
 /**********************
- *      TYPEDEFS
+ *  STATIC VARIABLES
  **********************/
 
-/**********************
- *  STATIC PROTOTYPES
- **********************/
-int map(int x, int in_min, int in_max, int out_min, int out_max);
+evdev_device_t global_dsc;
 
 /**********************
- *  STATIC VARIABLES
+ *  STATIC FUNCTIONS
  **********************/
-int evdev_fd = -1;
-int evdev_root_x;
-int evdev_root_y;
-int evdev_button;
 
-int evdev_key_val;
+static int _evdev_process_key(uint16_t code, bool pressed)
+{
+#if USE_XKB
+    return xkb_process_key(code, pressed);
+#else
+    LV_UNUSED(pressed);
+    switch(code) {
+        case KEY_UP:
+            return LV_KEY_UP;
+        case KEY_DOWN:
+            return LV_KEY_DOWN;
+        case KEY_RIGHT:
+            return LV_KEY_RIGHT;
+        case KEY_LEFT:
+            return LV_KEY_LEFT;
+        case KEY_ESC:
+            return LV_KEY_ESC;
+        case KEY_DELETE:
+            return LV_KEY_DEL;
+        case KEY_BACKSPACE:
+            return LV_KEY_BACKSPACE;
+        case KEY_ENTER:
+            return LV_KEY_ENTER;
+        case KEY_NEXT:
+        case KEY_TAB:
+            return LV_KEY_NEXT;
+        case KEY_PREVIOUS:
+            return LV_KEY_PREV;
+        case KEY_HOME:
+            return LV_KEY_HOME;
+        case KEY_END:
+            return LV_KEY_END;
+        default:
+            return 0;
+    }
+#endif /*USE_XKB*/
+}
 
-/**********************
- *      MACROS
- **********************/
+static int _evdev_calibrate(int v, int in_min, int in_max, int out_min, int out_max)
+{
+    if(in_min != in_max) v = (v - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
+    return LV_CLAMP(out_min, v, out_max);
+}
+
+static lv_point_t _evdev_process_pointer(lv_indev_drv_t * drv, int x, int y)
+{
+    evdev_device_t * dsc = drv->user_data ? drv->user_data : &global_dsc;
+
+    int swapped_x = dsc->swap_axes ? y : x;
+    int swapped_y = dsc->swap_axes ? x : y;
+
+    int offset_x = 0; /*Not lv_disp_get_offset_x(drv->disp) for bc*/
+    int offset_y = 0; /*Not lv_disp_get_offset_y(drv->disp) for bc*/
+    int width = lv_disp_get_hor_res(drv->disp);
+    int height = lv_disp_get_ver_res(drv->disp);
+
+    lv_point_t p;
+    p.x = _evdev_calibrate(swapped_x, dsc->hor_min, dsc->hor_max, offset_x, offset_x + width - 1);
+    p.y = _evdev_calibrate(swapped_y, dsc->ver_min, dsc->ver_max, offset_y, offset_y + height - 1);
+    return p;
+}
 
 /**********************
  *   GLOBAL FUNCTIONS
  **********************/
 
-/**
- * Initialize the evdev interface
- */
-void evdev_init(void)
+void evdev_init()
 {
-    if (!evdev_set_file(EVDEV_NAME)) {
-        return;
-    }
+    evdev_device_init(&global_dsc);
+#ifdef EVDEV_SWAP_AXES
+    evdev_device_set_swap_axes(&global_dsc, EVDEV_SWAP_AXES);
+#endif
+#if EVDEV_CALIBRATE
+    evdev_device_set_calibration(&global_dsc, EVDEV_HOR_MIN, EVDEV_VER_MIN, EVDEV_HOR_MAX, EVDEV_VER_MAX);
+#endif
+    evdev_device_set_file(&global_dsc, EVDEV_NAME);
+}
+
+void evdev_device_init(evdev_device_t * dsc)
+{
+    lv_memset(dsc, 0, sizeof(evdev_device_t));
+    dsc->fd = -1;
 
 #if USE_XKB
     xkb_init();
 #endif
 }
-/**
- * reconfigure the device file for evdev
- * @param dev_name set the evdev device filename
- * @return true: the device file set complete
- *         false: the device file doesn't exist current system
- */
-bool evdev_set_file(char* dev_name)
-{ 
-     if(evdev_fd != -1) {
-        close(evdev_fd);
-     }
-#if USE_BSD_EVDEV
-     evdev_fd = open(dev_name, O_RDWR | O_NOCTTY);
-#else
-     evdev_fd = open(dev_name, O_RDWR | O_NOCTTY | O_NDELAY);
-#endif
 
-     if(evdev_fd == -1) {
-        perror("unable to open evdev interface:");
+bool evdev_set_file(const char * dev_path)
+{
+    return evdev_device_set_file(&global_dsc, dev_path);
+}
+
+bool evdev_device_set_file(evdev_device_t * dsc, const char * dev_path)
+{
+    /*Reset state*/
+    dsc->root_x = 0;
+    dsc->root_y = 0;
+    dsc->key = 0;
+    dsc->state = LV_INDEV_STATE_RELEASED;
+
+    /*Close previous*/
+    if(dsc->fd >= 0) {
+        close(dsc->fd);
+        dsc->fd = -1;
+    }
+    if(!dev_path) return false;
+
+    /*Open new*/
+    dsc->fd = open(dev_path, O_RDONLY | O_NOCTTY | O_CLOEXEC);
+    if(dsc->fd < 0) {
+        LV_LOG_ERROR("open failed: %s", strerror(errno));
+        return false;
+    }
+    if(fcntl(dsc->fd, F_SETFL, O_NONBLOCK) < 0) {
+        LV_LOG_ERROR("fcntl failed: %s", strerror(errno));
+        close(dsc->fd);
+        dsc->fd = -1;
         return false;
-     }
+    }
 
-#if USE_BSD_EVDEV
-     fcntl(evdev_fd, F_SETFL, O_NONBLOCK);
-#else
-     fcntl(evdev_fd, F_SETFL, O_ASYNC | O_NONBLOCK);
-#endif
+    return true;
+}
 
-     evdev_root_x = 0;
-     evdev_root_y = 0;
-     evdev_key_val = 0;
-     evdev_button = LV_INDEV_STATE_REL;
+void evdev_device_set_swap_axes(evdev_device_t * dsc, bool swap_axes)
+{
+    dsc->swap_axes = swap_axes;
+}
 
-     return true;
+void evdev_device_set_calibration(evdev_device_t * dsc, int ver_min, int hor_min, int ver_max, int hor_max)
+{
+    dsc->ver_min = ver_min;
+    dsc->hor_min = hor_min;
+    dsc->ver_max = ver_max;
+    dsc->hor_max = hor_max;
 }
-/**
- * Get the current position and state of the evdev
- * @param data store the evdev data here
- */
+
 void evdev_read(lv_indev_drv_t * drv, lv_indev_data_t * data)
 {
-    struct input_event in;
+    evdev_device_t * dsc = drv->user_data ? drv->user_data : &global_dsc;
+    if(dsc->fd < 0) return;
 
-    while(read(evdev_fd, &in, sizeof(struct input_event)) > 0) {
+    /*Update dsc with buffered events*/
+    struct input_event in = { 0 };
+    while(read(dsc->fd, &in, sizeof(in)) > 0) {
         if(in.type == EV_REL) {
-            if(in.code == REL_X)
-				#if EVDEV_SWAP_AXES
-					evdev_root_y += in.value;
-				#else
-					evdev_root_x += in.value;
-				#endif
-            else if(in.code == REL_Y)
-				#if EVDEV_SWAP_AXES
-					evdev_root_x += in.value;
-				#else
-					evdev_root_y += in.value;
-				#endif
-        } else if(in.type == EV_ABS) {
-            if(in.code == ABS_X)
-				#if EVDEV_SWAP_AXES
-					evdev_root_y = in.value;
-				#else
-					evdev_root_x = in.value;
-				#endif
-            else if(in.code == ABS_Y)
-				#if EVDEV_SWAP_AXES
-					evdev_root_x = in.value;
-				#else
-					evdev_root_y = in.value;
-				#endif
-            else if(in.code == ABS_MT_POSITION_X)
-                                #if EVDEV_SWAP_AXES
-                                        evdev_root_y = in.value;
-                                #else
-                                        evdev_root_x = in.value;
-                                #endif
-            else if(in.code == ABS_MT_POSITION_Y)
-                                #if EVDEV_SWAP_AXES
-                                        evdev_root_x = in.value;
-                                #else
-                                        evdev_root_y = in.value;
-                                #endif
+            if(in.code == REL_X) dsc->root_x += in.value;
+            else if(in.code == REL_Y) dsc->root_y += in.value;
+        }
+        else if(in.type == EV_ABS) {
+            if(in.code == ABS_X || in.code == ABS_MT_POSITION_X) dsc->root_x = in.value;
+            else if(in.code == ABS_Y || in.code == ABS_MT_POSITION_Y) dsc->root_y = in.value;
             else if(in.code == ABS_MT_TRACKING_ID) {
-                                if(in.value == -1)
-                                    evdev_button = LV_INDEV_STATE_REL;
-                                else if(in.value == 0)
-                                    evdev_button = LV_INDEV_STATE_PR;
+                if(in.value == -1) dsc->state = LV_INDEV_STATE_RELEASED;
+                else if(in.value == 0) dsc->state = LV_INDEV_STATE_PRESSED;
             }
-        } else if(in.type == EV_KEY) {
+        }
+        else if(in.type == EV_KEY) {
             if(in.code == BTN_MOUSE || in.code == BTN_TOUCH) {
-                if(in.value == 0)
-                    evdev_button = LV_INDEV_STATE_REL;
-                else if(in.value == 1)
-                    evdev_button = LV_INDEV_STATE_PR;
-            } else if(drv->type == LV_INDEV_TYPE_KEYPAD) {
-#if USE_XKB
-                data->key = xkb_process_key(in.code, in.value != 0);
-#else
-                switch(in.code) {
-                    case KEY_BACKSPACE:
-                        data->key = LV_KEY_BACKSPACE;
-                        break;
-                    case KEY_ENTER:
-                        data->key = LV_KEY_ENTER;
-                        break;
-                    case KEY_PREVIOUS:
-                        data->key = LV_KEY_PREV;
-                        break;
-                    case KEY_NEXT:
-                        data->key = LV_KEY_NEXT;
-                        break;
-                    case KEY_UP:
-                        data->key = LV_KEY_UP;
-                        break;
-                    case KEY_LEFT:
-                        data->key = LV_KEY_LEFT;
-                        break;
-                    case KEY_RIGHT:
-                        data->key = LV_KEY_RIGHT;
-                        break;
-                    case KEY_DOWN:
-                        data->key = LV_KEY_DOWN;
-                        break;
-                    case KEY_TAB:
-                        data->key = LV_KEY_NEXT;
-                        break;
-                    default:
-                        data->key = 0;
-                        break;
-                }
-#endif /* USE_XKB */
-                if (data->key != 0) {
-                    /* Only record button state when actual output is produced to prevent widgets from refreshing */
-                    data->state = (in.value) ? LV_INDEV_STATE_PR : LV_INDEV_STATE_REL;
+                if(in.value == 0) dsc->state = LV_INDEV_STATE_RELEASED;
+                else if(in.value == 1) dsc->state = LV_INDEV_STATE_PRESSED;
+            }
+            else {
+                dsc->key = _evdev_process_key(in.code, in.value != 0);
+                if(dsc->key) {
+                    dsc->state = in.value ? LV_INDEV_STATE_PRESSED : LV_INDEV_STATE_RELEASED;
+                    data->continue_reading = true; /*Keep following events in buffer for now*/
+                    break;
                 }
-                evdev_key_val = data->key;
-                evdev_button = data->state;
-                return;
             }
         }
     }
 
-    if(drv->type == LV_INDEV_TYPE_KEYPAD) {
-        /* No data retrieved */
-        data->key = evdev_key_val;
-        data->state = evdev_button;
-        return;
+    /*Process and store in data*/
+    switch(drv->type) {
+        case LV_INDEV_TYPE_KEYPAD:
+            data->state = dsc->state;
+            data->key = dsc->key;
+            break;
+        case LV_INDEV_TYPE_POINTER:
+            data->state = dsc->state;
+            data->point = _evdev_process_pointer(drv, dsc->root_x, dsc->root_y);
+            break;
+        default:
+            break;
     }
-    if(drv->type != LV_INDEV_TYPE_POINTER)
-        return ;
-    /*Store the collected data*/
-
-#if EVDEV_CALIBRATE
-    data->point.x = map(evdev_root_x, EVDEV_HOR_MIN, EVDEV_HOR_MAX, 0, drv->disp->driver->hor_res);
-    data->point.y = map(evdev_root_y, EVDEV_VER_MIN, EVDEV_VER_MAX, 0, drv->disp->driver->ver_res);
-#else
-    data->point.x = evdev_root_x;
-    data->point.y = evdev_root_y;
-#endif
-
-    data->state = evdev_button;
-
-    if(data->point.x < 0)
-      data->point.x = 0;
-    if(data->point.y < 0)
-      data->point.y = 0;
-    if(data->point.x >= drv->disp->driver->hor_res)
-      data->point.x = drv->disp->driver->hor_res - 1;
-    if(data->point.y >= drv->disp->driver->ver_res)
-      data->point.y = drv->disp->driver->ver_res - 1;
-
-    return ;
 }
 
-/**********************
- *   STATIC FUNCTIONS
- **********************/
-int map(int x, int in_min, int in_max, int out_min, int out_max)
-{
-  return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
-}
-
-#endif
+#endif /*USE_EVDEV*/

lib/lv_drivers/indev/evdev.h

@@ -29,39 +29,81 @@ extern "C" {
 #include "lvgl/lvgl.h"
 #endif
 
-/*********************
- *      DEFINES
- *********************/
-
 /**********************
  *      TYPEDEFS
  **********************/
 
+typedef struct {
+    /*Device*/
+    int fd;
+    /*Config*/
+    bool swap_axes;
+    int ver_min;
+    int hor_min;
+    int ver_max;
+    int hor_max;
+    /*State*/
+    int root_x;
+    int root_y;
+    int key;
+    lv_indev_state_t state;
+} evdev_device_t;
+
 /**********************
  * GLOBAL PROTOTYPES
  **********************/
 
 /**
- * Initialize the evdev
+ * Initialize the global evdev device, as configured with EVDEV_NAME,
+ * EVDEV_SWAP_AXES, and EVDEV_CALIBRATE.
  */
-void evdev_init(void);
+void evdev_init();
 /**
- * reconfigure the device file for evdev
- * @param dev_name set the evdev device filename
- * @return true: the device file set complete
- *         false: the device file doesn't exist current system
+ * Initialize an evdev device.
+ * @param dsc evdev device
  */
-bool evdev_set_file(char* dev_name);
+void evdev_device_init(evdev_device_t * dsc);
+
 /**
- * Get the current position and state of the evdev
- * @param data store the evdev data here
+ * Reconfigure the path for the global evdev device.
+ * @param dev_path device path, e.g., /dev/input/event0, or NULL to close
+ * @return whether the device was successfully opened
  */
-void evdev_read(lv_indev_drv_t * drv, lv_indev_data_t * data);
+bool evdev_set_file(const char * dev_path);
+/**
+ * Configure or reconfigure the path for an evdev device.
+ * @param dsc evdev device
+ * @param dev_path device path, e.g., /dev/input/event0, or NULL to close
+ * @return whether the device was successfully opened
+ */
+bool evdev_device_set_file(evdev_device_t * dsc, const char * dev_path);
+
+/**
+ * Configure whether pointer coordinates of an evdev device sould be swapped.
+ * Default to false.
+ * @param dsc evdev device
+ * @param swap_axes whether to swap x and y axes
+ */
+void evdev_device_set_swap_axes(evdev_device_t * dsc, bool swap_axes);
 
+/**
+ * Configure a coordinate transformation for an evdev device. Applied after
+ * axis swap, if any. Defaults to no transformation.
+ * @param dsc evdev device
+ * @param hor_min horizontal pointer coordinate mapped to 0
+ * @param ver_min vertical pointer coordinate mapped to 0
+ * @param ver_min pointer coordinate mapped to horizontal max of display
+ * @param ver_max pointer coordinate mapped to vertical max of display
+ */
+void evdev_device_set_calibration(evdev_device_t * dsc, int hor_min, int ver_min, int hor_max, int ver_max);
 
-/**********************
- *      MACROS
- **********************/
+/**
+ * Read callback for the input driver.
+ * @param drv input driver where drv->user_data is NULL for the global evdev
+ *            device or an evdev_device_t pointer.
+ * @param data destination for input events
+ */
+void evdev_read(lv_indev_drv_t * drv, lv_indev_data_t * data);
 
 #endif /* USE_EVDEV */
 

lib/lv_drivers/indev/libinput.c

@@ -74,7 +74,28 @@ static const struct libinput_interface interface = {
  **********************/
 
 /**
- * find connected input device with specific capabilities
+ * Determine the capabilities of a specific libinput device.
+ * @param device the libinput device to query
+ * @return the supported input capabilities
+ */
+libinput_capability libinput_query_capability(struct libinput_device *device) {
+  libinput_capability capability = LIBINPUT_CAPABILITY_NONE;
+  if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_KEYBOARD)
+      && (libinput_device_keyboard_has_key(device, KEY_ENTER) || libinput_device_keyboard_has_key(device, KEY_KPENTER)))
+  {
+    capability |= LIBINPUT_CAPABILITY_KEYBOARD;
+  }
+  if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_POINTER)) {
+    capability |= LIBINPUT_CAPABILITY_POINTER;
+  }
+  if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_TOUCH)) {
+    capability |= LIBINPUT_CAPABILITY_TOUCH;
+  }
+  return capability;
+}
+
+/**
+ * Find connected input device with specific capabilities
  * @param capabilities required device capabilities
  * @param force_rescan erase the device cache (if any) and rescan the file system for available devices
  * @return device node path (e.g. /dev/input/event0) for the first matching device or NULL if no device was found.
@@ -87,7 +108,7 @@ char *libinput_find_dev(libinput_capability capabilities, bool force_rescan) {
 }
 
 /**
- * find connected input devices with specific capabilities
+ * Find connected input devices with specific capabilities
  * @param capabilities required device capabilities
  * @param devices pre-allocated array to store the found device node paths (e.g. /dev/input/event0). The pointers are
  *                safe to use until the next forceful device search.
@@ -138,8 +159,8 @@ bool libinput_set_file_state(libinput_drv_state_t *state, char* dev_name)
   // citing libinput.h:libinput_path_remove_device:
   // > If no matching device exists, this function does nothing.
   if (state->libinput_device) {
-    state->libinput_device = libinput_device_unref(state->libinput_device);
     libinput_path_remove_device(state->libinput_device);
+    state->libinput_device = libinput_device_unref(state->libinput_device);
   }
 
   state->libinput_device = libinput_path_add_device(state->libinput_context, dev_name);
@@ -195,6 +216,29 @@ void libinput_init_state(libinput_drv_state_t *state, char* path)
 #endif
 }
 
+/**
+ * De-initialise a previously initialised driver state and free any dynamically allocated memory. Use this function if you want to
+ * reuse an existing driver state.
+ * @param state driver state to de-initialize
+ */
+void libinput_deinit_state(libinput_drv_state_t *state)
+{
+  if (state->libinput_device) {
+    libinput_path_remove_device(state->libinput_device);
+    libinput_device_unref(state->libinput_device);
+  }
+
+  if (state->libinput_context) {
+    libinput_unref(state->libinput_context);
+  }
+
+#if USE_XKB
+  xkb_deinit_state(&(state->xkb_state));
+#endif
+
+  lv_memzero(state, sizeof(libinput_drv_state_t));
+}
+
 /**
  * Read available input events via libinput using the default driver state. Use this function if you only want
  * to connect a single device.
@@ -296,18 +340,7 @@ static bool rescan_devices(void) {
      * as part of this function, we don't have to increase its reference count to keep it alive.
      * https://wayland.freedesktop.org/libinput/doc/latest/api/group__base.html#gaa797496f0150b482a4e01376bd33a47b */
 
-    libinput_capability capabilities = LIBINPUT_CAPABILITY_NONE;
-    if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_KEYBOARD)
-        && (libinput_device_keyboard_has_key(device, KEY_ENTER) || libinput_device_keyboard_has_key(device, KEY_KPENTER)))
-    {
-      capabilities |= LIBINPUT_CAPABILITY_KEYBOARD;
-    }
-    if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_POINTER)) {
-      capabilities |= LIBINPUT_CAPABILITY_POINTER;
-    }
-    if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_TOUCH)) {
-      capabilities |= LIBINPUT_CAPABILITY_TOUCH;
-    }
+    libinput_capability capabilities = libinput_query_capability(device);
 
     libinput_path_remove_device(device);
 
@@ -387,13 +420,13 @@ static void read_pointer(libinput_drv_state_t *state, struct libinput_event *eve
     case LIBINPUT_EVENT_TOUCH_MOTION:
     case LIBINPUT_EVENT_TOUCH_DOWN:
       touch_event = libinput_event_get_touch_event(event);
-      lv_coord_t x = libinput_event_touch_get_x_transformed(touch_event, drv->physical_hor_res > 0 ? drv->physical_hor_res : drv->hor_res) - drv->offset_x;
-      lv_coord_t y = libinput_event_touch_get_y_transformed(touch_event, drv->physical_ver_res > 0 ? drv->physical_ver_res : drv->ver_res) - drv->offset_y;
-      if (x < 0 || x > drv->hor_res || y < 0 || y > drv->ver_res) {
+      lv_coord_t x_touch = libinput_event_touch_get_x_transformed(touch_event, drv->physical_hor_res > 0 ? drv->physical_hor_res : drv->hor_res) - drv->offset_x;
+      lv_coord_t y_touch = libinput_event_touch_get_y_transformed(touch_event, drv->physical_ver_res > 0 ? drv->physical_ver_res : drv->ver_res) - drv->offset_y;
+      if (x_touch < 0 || x_touch > drv->hor_res || y_touch < 0 || y_touch > drv->ver_res) {
         break; /* ignore touches that are out of bounds */
       }
-      state->most_recent_touch_point.x = x;
-      state->most_recent_touch_point.y = y;
+      state->most_recent_touch_point.x = x_touch;
+      state->most_recent_touch_point.y = y_touch;
       state->button = LV_INDEV_STATE_PR;
       break;
     case LIBINPUT_EVENT_TOUCH_UP:
@@ -406,6 +439,16 @@ static void read_pointer(libinput_drv_state_t *state, struct libinput_event *eve
       state->most_recent_touch_point.x = LV_CLAMP(0, state->most_recent_touch_point.x, drv->hor_res - 1);
       state->most_recent_touch_point.y = LV_CLAMP(0, state->most_recent_touch_point.y, drv->ver_res - 1);
       break;
+    case LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE:
+      pointer_event = libinput_event_get_pointer_event(event);
+      lv_coord_t x_pointer = libinput_event_pointer_get_absolute_x_transformed(pointer_event, drv->physical_hor_res > 0 ? drv->physical_hor_res : drv->hor_res) - drv->offset_x;
+      lv_coord_t y_pointer = libinput_event_pointer_get_absolute_y_transformed(pointer_event, drv->physical_ver_res > 0 ? drv->physical_ver_res : drv->ver_res) - drv->offset_y;
+      if (x_pointer < 0 || x_pointer > drv->hor_res || y_pointer < 0 || y_pointer > drv->ver_res) {
+        break; /* ignore pointer events that are out of bounds */
+      }
+      state->most_recent_touch_point.x = x_pointer;
+      state->most_recent_touch_point.y = y_pointer;
+      break;
     case LIBINPUT_EVENT_POINTER_BUTTON:
       pointer_event = libinput_event_get_pointer_event(event);
       enum libinput_button_state button_state = libinput_event_pointer_get_button_state(pointer_event); 

lib/lv_drivers/indev/libinput_drv.h

@@ -70,7 +70,13 @@ typedef struct {
  **********************/
 
 /**
- * find connected input device with specific capabilities
+ * Determine the capabilities of a specific libinput device.
+ * @param device the libinput device to query
+ * @return the supported input capabilities
+ */
+libinput_capability libinput_query_capability(struct libinput_device *device);
+/**
+ * Find connected input device with specific capabilities
  * @param capabilities required device capabilities
  * @param force_rescan erase the device cache (if any) and rescan the file system for available devices
  * @return device node path (e.g. /dev/input/event0) for the first matching device or NULL if no device was found.
@@ -78,7 +84,7 @@ typedef struct {
  */
 char *libinput_find_dev(libinput_capability capabilities, bool force_rescan);
 /**
- * find connected input devices with specific capabilities
+ * Find connected input devices with specific capabilities
  * @param capabilities required device capabilities
  * @param devices pre-allocated array to store the found device node paths (e.g. /dev/input/event0). The pointers are
  *                safe to use until the next forceful device search.
@@ -99,6 +105,12 @@ void libinput_init(void);
  * @param path input device node path (e.g. /dev/input/event0)
  */
 void libinput_init_state(libinput_drv_state_t *state, char* path);
+/**
+ * De-initialise a previously initialised driver state and free any dynamically allocated memory. Use this function if you want to
+ * reuse an existing driver state.
+ * @param state driver state to de-initialize
+ */
+void libinput_deinit_state(libinput_drv_state_t *state);
 /**
  * Reconfigure the device file for libinput using the default driver state. Use this function if you only want
  * to connect a single device.

lib/lv_drivers/indev/xkb.c

@@ -73,6 +73,23 @@ bool xkb_init_state(xkb_drv_state_t *state) {
 #endif
 }
 
+/**
+ * De-initialise a previously initialised driver state and free any dynamically allocated memory. Use this function if you want to
+ * reuse an existing driver state.
+ * @param state XKB driver state to use
+ */
+void xkb_deinit_state(xkb_drv_state_t *state) {
+  if (state->state) {
+    xkb_state_unref(state->state);
+    state->state = NULL;
+  }
+
+  if (state->keymap) {
+    xkb_keymap_unref(state->keymap);
+    state->keymap = NULL;
+  }
+}
+
 /**
  * Set a new keymap to be used for processing future key events using the default driver state. Use
  * this function if you only want to connect a single device.
@@ -95,19 +112,13 @@ bool xkb_set_keymap_state(xkb_drv_state_t *state, struct xkb_rule_names names) {
     xkb_keymap_unref(state->keymap);
     state->keymap = NULL;
   }
- 
+
   state->keymap = xkb_keymap_new_from_names(context, &names, XKB_KEYMAP_COMPILE_NO_FLAGS);
   if (!state->keymap) {
     perror("could not create XKB keymap");
     return false;
   }
 
-  state->keymap = xkb_keymap_ref(state->keymap);
-  if (!state->keymap) {
-    perror("could not reference XKB keymap");
-    return false;
-  }
-
   if (state->state) {
     xkb_state_unref(state->state);
     state->state = NULL;
@@ -119,12 +130,6 @@ bool xkb_set_keymap_state(xkb_drv_state_t *state, struct xkb_rule_names names) {
     return false;
   }
 
-  state->state = xkb_state_ref(state->state);
-  if (!state->state) {
-    perror("could not reference XKB state");
-    return false;
-  }
-
   return true;
 }
 

lib/lv_drivers/indev/xkb.h

@@ -60,6 +60,12 @@ bool xkb_init(void);
  * @return true if the initialisation was successful
  */
 bool xkb_init_state(xkb_drv_state_t *state);
+/**
+ * De-initialise a previously initialised driver state and free any dynamically allocated memory. Use this function if you want to
+ * reuse an existing driver state.
+ * @param state XKB driver state to use
+ */
+void xkb_deinit_state(xkb_drv_state_t *state);
 /**
  * Set a new keymap to be used for processing future key events using the default driver state. Use
  * this function if you only want to connect a single device.

lib/lv_drivers/library.json

@@ -1,6 +1,6 @@
 {
     "name": "lv_drivers",
-    "version": "8.3.0",
+    "version": "9.0.0-dev",
     "keywords": "littlevgl, lvgl, driver, display, touchpad",
     "description": "Drivers for LittlevGL graphics library.",
     "repository": {

lib/lv_drivers/lv-drivers.pc.in

@@ -0,0 +1,11 @@
+prefix="@CMAKE_INSTALL_PREFIX@"
+includedir="${prefix}/@INC_INSTALL_DIR@"
+libdir=${prefix}/lib
+
+Name: lv-drivers
+Description: Display controller and touchpad driver that can be directly used with LVGL
+URL: https://lvgl.io/
+Version: 9.0.0
+Cflags: -I${includedir}
+Libs: -L${libdir} -llv_drivers
+Requires: lvgl

lib/lv_drivers/lv_drivers.mk

@@ -1,10 +1,5 @@
-LV_DRIVERS_DIR_NAME ?= lv_drivers
+LV_DRIVERS_PATH ?= ${shell pwd}/lv_drivers
 
-override CFLAGS := -I$(LVGL_DIR) $(CFLAGS)
+CSRCS += $(shell find $(LV_DRIVERS_PATH) -type f -name '*.c')
+CFLAGS += "-I$(LV_DRIVERS_PATH)"
 
-CSRCS += $(wildcard $(LVGL_DIR)/$(LV_DRIVERS_DIR_NAME)/*.c)
-CSRCS += $(wildcard $(LVGL_DIR)/$(LV_DRIVERS_DIR_NAME)/wayland/*.c)
-CSRCS += $(wildcard $(LVGL_DIR)/$(LV_DRIVERS_DIR_NAME)/indev/*.c)
-CSRCS += $(wildcard $(LVGL_DIR)/$(LV_DRIVERS_DIR_NAME)/gtkdrv/*.c)
-CSRCS += $(wildcard $(LVGL_DIR)/$(LV_DRIVERS_DIR_NAME)/display/*.c)
-CSRCS += $(wildcard $(LVGL_DIR)/$(LV_DRIVERS_DIR_NAME)/sdl/*.c)

lib/lv_drivers/lv_drv_conf_template.h

@@ -1,6 +1,6 @@
 /**
  * @file lv_drv_conf.h
- * Configuration file for v8.3.0
+ * Configuration file for v9.0.0-dev
  */
 
 /*
@@ -110,6 +110,9 @@
 
 /*Open two windows to test multi display support*/
 #  define SDL_DUAL_DISPLAY            0
+
+/* Window Title  */
+#  define SDL_WINDOW_TITLE "TFT Simulator"
 #endif
 
 /*-------------------
@@ -192,6 +195,13 @@
 #  endif
 #endif
 
+/*----------------------------------------
+ *  X11 drivers (monitor, mouse, keyboard)
+ *---------------------------------------*/
+#ifndef USE_X11
+#  define USE_X11       0
+#endif
+
 /*----------------
  *    SSD1963
  *--------------*/

lib/lv_drivers/sdl/sdl.c

@@ -9,8 +9,8 @@
 #include "sdl.h"
 #if USE_MONITOR || USE_SDL
 
-#if LV_USE_GPU_SDL
-# error "LV_USE_GPU_SDL must not be enabled"
+#if LV_USE_DRAW_SDL 
+# error "LV_USE_DRAW_SDL must not be enabled"
 #endif
 
 #if USE_MONITOR
@@ -47,6 +47,7 @@
 # define SDL_FULLSCREEN        0
 #endif
 
+#include "sdl_common_internal.h"
 #include <stdlib.h>
 #include <stdbool.h>
 #include <string.h>
@@ -59,6 +60,9 @@
 #define KEYBOARD_BUFFER_SIZE SDL_TEXTINPUTEVENT_TEXT_SIZE
 #endif
 
+#ifndef SDL_WINDOW_TITLE
+#define SDL_WINDOW_TITLE "TFT Simulator"
+#endif
 /**********************
  *      TYPEDEFS
  **********************/
@@ -96,17 +100,6 @@ monitor_t monitor;
 monitor_t monitor2;
 #endif
 
-static volatile bool sdl_inited = false;
-
-static bool left_button_down = false;
-static int16_t last_x = 0;
-static int16_t last_y = 0;
-
-static int16_t wheel_diff = 0;
-static lv_indev_state_t wheel_state = LV_INDEV_STATE_RELEASED;
-
-static char buf[KEYBOARD_BUFFER_SIZE];
-
 /**********************
  *      MACROS
  **********************/
@@ -344,7 +337,7 @@ static void window_create(monitor_t * m)
     flag |= SDL_WINDOW_FULLSCREEN;
 #endif
 
-    m->window = SDL_CreateWindow("TFT Simulator",
+    m->window = SDL_CreateWindow(SDL_WINDOW_TITLE,
                               SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
                               SDL_HOR_RES * SDL_ZOOM, SDL_VER_RES * SDL_ZOOM, flag);       /*last param. SDL_WINDOW_BORDERLESS to hide borders*/
 
@@ -375,7 +368,7 @@ static void window_update(monitor_t * m)
 #endif
     SDL_RenderClear(m->renderer);
     lv_disp_t * d = _lv_refr_get_disp_refreshing();
-    if(d->driver->screen_transp) {
+    if(d && d->driver->screen_transp) {
         SDL_SetRenderDrawColor(m->renderer, 0xff, 0, 0, 0xff);
         SDL_Rect r;
         r.x = 0; r.y = 0; r.w = SDL_HOR_RES; r.h = SDL_VER_RES;

lib/lv_drivers/sdl/sdl_common.c

@@ -5,6 +5,8 @@
 #include "sdl_common.h"
 
 #if USE_SDL || USE_SDL_GPU
+#include "sdl_common_internal.h"
+
 /*********************
  *      DEFINES
  *********************/
@@ -130,17 +132,17 @@ void mouse_handler(SDL_Event * event)
 
         case SDL_FINGERUP:
             left_button_down = false;
-            last_x = LV_HOR_RES * event->tfinger.x / SDL_ZOOM;
-            last_y = LV_VER_RES * event->tfinger.y / SDL_ZOOM;
+            last_x = SDL_HOR_RES * event->tfinger.x / SDL_ZOOM;
+            last_y = SDL_VER_RES * event->tfinger.y / SDL_ZOOM;
             break;
         case SDL_FINGERDOWN:
             left_button_down = true;
-            last_x = LV_HOR_RES * event->tfinger.x / SDL_ZOOM;
-            last_y = LV_VER_RES * event->tfinger.y / SDL_ZOOM;
+            last_x = SDL_HOR_RES * event->tfinger.x / SDL_ZOOM;
+            last_y = SDL_VER_RES * event->tfinger.y / SDL_ZOOM;
             break;
         case SDL_FINGERMOTION:
-            last_x = LV_HOR_RES * event->tfinger.x / SDL_ZOOM;
-            last_y = LV_VER_RES * event->tfinger.y / SDL_ZOOM;
+            last_x = SDL_HOR_RES * event->tfinger.x / SDL_ZOOM;
+            last_y = SDL_VER_RES * event->tfinger.y / SDL_ZOOM;
             break;
     }
 

lib/lv_drivers/sdl/sdl_common.h

@@ -32,7 +32,6 @@ extern "C" {
 #ifndef SDL_INCLUDE_PATH
 #define SDL_INCLUDE_PATH MONITOR_SDL_INCLUDE_PATH
 #endif
-#include SDL_INCLUDE_PATH
 
 #ifndef SDL_ZOOM
 #define SDL_ZOOM MONITOR_ZOOM
@@ -85,16 +84,6 @@ void sdl_mousewheel_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data);
  */
 void sdl_keyboard_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data);
 
-int quit_filter(void * userdata, SDL_Event * event);
-
-void mouse_handler(SDL_Event * event);
-void mousewheel_handler(SDL_Event * event);
-uint32_t keycode_to_ctrl_key(SDL_Keycode sdl_key);
-void keyboard_handler(SDL_Event * event);
-
-/**********************
- *      MACROS
- **********************/
 #endif /* USE_SDL || USE_SDL_GPU */
 
 #ifdef __cplusplus

lib/lv_drivers/sdl/sdl_common_internal.h

@@ -0,0 +1,39 @@
+/**
+ * @file sdl_common_internal.h
+ * Provides SDL related functions which are only used internal.
+ *
+ */
+
+#ifndef SDL_COMMON_INTERNAL_H
+#define SDL_COMMON_INTERNAL_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*********************
+ *      INCLUDES
+ *********************/
+#include "sdl_common.h"
+
+#if USE_SDL || USE_SDL_GPU
+
+#include SDL_INCLUDE_PATH
+
+/**********************
+ * GLOBAL PROTOTYPES
+ **********************/
+int quit_filter(void * userdata, SDL_Event * event);
+
+void mouse_handler(SDL_Event * event);
+void mousewheel_handler(SDL_Event * event);
+uint32_t keycode_to_ctrl_key(SDL_Keycode sdl_key);
+void keyboard_handler(SDL_Event * event);
+
+#endif /* USE_SDL || USE_SDL_GPU */
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* SDL_COMMON_INTERNAL_H */

lib/lv_drivers/sdl/sdl_gpu.c

@@ -9,7 +9,7 @@
 #include "sdl_gpu.h"
 #if USE_SDL_GPU
 
-#if LV_USE_GPU_SDL == 0
+#if LV_USE_DRAW_SDL == 0
 # error "LV_USE_DRAW_SDL must be enabled"
 #endif
 
@@ -29,6 +29,7 @@
 # error "Cannot enable both MONITOR and SDL at the same time. "
 #endif
 
+#include "sdl_common_internal.h"
 #include <stdlib.h>
 #include <stdbool.h>
 #include <string.h>
@@ -90,14 +91,14 @@ void sdl_init(void)
 
 void sdl_disp_drv_init(lv_disp_drv_t * disp_drv, lv_coord_t hor_res, lv_coord_t ver_res)
 {
-    monitor_t *m = lv_mem_alloc(sizeof(monitor_t));
+    monitor_t *m = lv_malloc(sizeof(monitor_t));
     window_create(m);
     lv_disp_drv_init(disp_drv);
     disp_drv->direct_mode = 1;
     disp_drv->flush_cb = monitor_flush;
     disp_drv->hor_res = hor_res;
     disp_drv->ver_res = ver_res;
-    lv_disp_draw_buf_t *disp_buf = lv_mem_alloc(sizeof(lv_disp_draw_buf_t));
+    lv_disp_draw_buf_t *disp_buf = lv_malloc(sizeof(lv_disp_draw_buf_t));
     lv_disp_draw_buf_init(disp_buf, m->texture, NULL, hor_res * ver_res);
     disp_drv->draw_buf = disp_buf;
     disp_drv->antialiasing = 1;

lib/lv_drivers/wayland/CMakeLists.txt

@@ -8,7 +8,7 @@ pkg_check_modules(xkbcommon REQUIRED xkbcommon)
 
 # Wayland protocols
 find_program(WAYLAND_SCANNER_EXECUTABLE NAMES wayland-scanner)
-pkg_check_modules(WAYLAND_PROTOCOLS REQUIRED wayland-protocols>=1.15)
+pkg_check_modules(WAYLAND_PROTOCOLS REQUIRED wayland-protocols>=1.25)
 pkg_get_variable(WAYLAND_PROTOCOLS_BASE wayland-protocols pkgdatadir)
 
 macro(wayland_generate protocol_xml_file output_dir target)

lib/lv_drivers/wayland/smm.c

@@ -0,0 +1,652 @@
+/**
+ * @file smm.c
+ *
+ */
+#if USE_WAYLAND
+
+#include <stddef.h>
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include "smm.h"
+
+#define MAX_NAME_ATTEMPTS (5)
+#define PREFER_NUM_BUFFERS (3)
+
+#define ROUND_UP(n, b) (((((n) ? (n) : 1) + (b) - 1) / (b)) * (b))
+#define LLHEAD(type) \
+struct { \
+   struct type *first; \
+   struct type *last; \
+}
+
+#define LLLINK(type) \
+struct { \
+   struct type *next; \
+   struct type *prev; \
+}
+
+#define LL_FIRST(head) ((head)->first)
+#define LL_LAST(head) ((head)->last)
+#define LL_IS_EMPTY(head) (LL_FIRST(head) == NULL)
+#define LL_NEXT(src, member) ((src)->member.next)
+#define LL_PREV(src, member) ((src)->member.prev)
+
+#define LL_INIT(head) do { \
+   (head)->first = NULL; \
+   (head)->last = NULL; \
+} while (0)
+
+#define LL_ENQUEUE(head, src, member) do { \
+   (src)->member.next = NULL; \
+   (src)->member.prev = (head)->last; \
+   if ((head)->last == NULL) { \
+      (head)->first = (src); \
+   } else { \
+      (head)->last->member.next = (src); \
+   } \
+   (head)->last = (src); \
+} while (0)
+
+#define LL_DEQUEUE(entry, head, member) do { \
+   (entry) = LL_FIRST(head); \
+   LL_REMOVE(head, entry, member); \
+} while (0)
+
+#define LL_INSERT_AFTER(head, dest, src, member) do { \
+   (src)->member.prev = (dest); \
+   (src)->member.next = (dest)->member.next; \
+   if ((dest)->member.next != NULL) { \
+      (dest)->member.next->member.prev = (src); \
+   } else { \
+      (head)->last = (src); \
+   } \
+   (dest)->member.next = (src); \
+} while (0)
+
+#define LL_REMOVE(head, src, member) do { \
+   if ((src)->member.prev != NULL) { \
+      (src)->member.prev->member.next = (src)->member.next; \
+   } else { \
+      (head)->first = (src)->member.next; \
+   } \
+   if ((src)->member.next != NULL) { \
+      (src)->member.next->member.prev = (src)->member.prev; \
+   } else { \
+      (head)->last = (src)->member.prev; \
+   } \
+} while (0)
+
+#define LL_FOREACH(entry, head, member) \
+   for ((entry) = LL_FIRST(head); \
+        (entry) != NULL; \
+        (entry) = LL_NEXT(entry, member))
+
+struct smm_pool {
+   struct smm_pool_properties props;
+   LLHEAD(smm_buffer) allocd;
+   void *map;
+   size_t map_size;
+   bool map_outdated;
+};
+
+struct smm_buffer {
+   struct smm_buffer_properties props;
+   bool group_resized;
+   LLLINK(smm_buffer) pool;
+   LLLINK(smm_buffer) use;
+   LLLINK(smm_buffer) age;
+};
+
+struct smm_group {
+   struct smm_group_properties props;
+   size_t size;
+   unsigned char num_buffers;
+   LLHEAD(smm_buffer) unused;
+   LLHEAD(smm_buffer) inuse;
+   LLHEAD(smm_buffer) history;
+   LLLINK(smm_group) link;
+};
+
+static size_t calc_buffer_size(struct smm_buffer *buf);
+static void purge_history(struct smm_buffer *buf);
+static struct smm_buffer *get_from_pool(struct smm_group *grp);
+static void return_to_pool(struct smm_buffer *buf);
+static struct smm_pool *alloc_pool(void);
+static void free_pool(struct smm_pool *pool);
+static struct smm_buffer *alloc_buffer(struct smm_buffer *last, size_t offset);
+static void free_buffer(struct smm_buffer *buf);
+
+static struct {
+   unsigned long page_sz;
+   struct smm_events cbs;
+   struct smm_pool *active;
+   LLHEAD(smm_group) groups;
+   struct {
+      size_t active_used;
+   } statistics;
+} smm_instance;
+
+
+void smm_init(struct smm_events *evs)
+{
+   memcpy(&smm_instance.cbs, evs, sizeof(struct smm_events));
+   srand((unsigned int)clock());
+   smm_instance.page_sz = (unsigned long)sysconf(_SC_PAGESIZE);
+   LL_INIT(&smm_instance.groups);
+}
+
+
+void smm_deinit(void)
+{
+   struct smm_group *grp;
+
+   /* Destroy all buffer groups */
+   while (!LL_IS_EMPTY(&smm_instance.groups)) {
+      LL_DEQUEUE(grp, &smm_instance.groups, link);
+      smm_destroy(grp);
+   }
+}
+
+
+void smm_setctx(void *ctx)
+{
+   smm_instance.cbs.ctx = ctx;
+}
+
+
+smm_group_t *smm_create(void)
+{
+   struct smm_group *grp;
+
+   /* Allocate and intialize a new buffer group */
+   grp = malloc(sizeof(struct smm_group));
+   if (grp != NULL) {
+      grp->size = smm_instance.page_sz;
+      grp->num_buffers = 0;
+      LL_INIT(&grp->unused);
+      LL_INIT(&grp->inuse);
+      LL_INIT(&grp->history);
+
+      /* Add to instance groups queue */
+      LL_ENQUEUE(&smm_instance.groups, grp, link);
+   }
+
+   return grp;
+}
+
+
+void smm_resize(smm_group_t *grp, size_t sz)
+{
+   struct smm_buffer *buf;
+   struct smm_group *rgrp = grp;
+
+   /* Round allocation size up to a sysconf(_SC_PAGE_SIZE) boundary */
+   rgrp->size = ROUND_UP(sz, smm_instance.page_sz);
+
+   /* Return all unused buffers to pool (to be re-allocated at the new size) */
+   while (!LL_IS_EMPTY(&rgrp->unused)) {
+      LL_DEQUEUE(buf, &rgrp->unused, use);
+      return_to_pool(buf);
+   }
+
+   /* Mark all buffers in use to be freed to pool when possible */
+   LL_FOREACH(buf, &rgrp->inuse, use) {
+      buf->group_resized = true;
+      purge_history(buf);
+   }
+}
+
+
+void smm_destroy(smm_group_t *grp)
+{
+   struct smm_buffer *buf;
+   struct smm_group *dgrp = grp;
+
+   /* Return unused buffers */
+   while (!LL_IS_EMPTY(&dgrp->unused)) {
+      LL_DEQUEUE(buf, &dgrp->unused, use);
+      return_to_pool(buf);
+   }
+
+   /* Return buffers that are still in use (ideally this queue should be empty
+    * at this time)
+    */
+   while (!LL_IS_EMPTY(&dgrp->inuse)) {
+      LL_DEQUEUE(buf, &dgrp->inuse, use);
+      return_to_pool(buf);
+   }
+
+   /* Remove from instance groups queue */
+   LL_REMOVE(&smm_instance.groups, dgrp, link);
+   free(dgrp);
+}
+
+
+smm_buffer_t *smm_acquire(smm_group_t *grp)
+{
+   struct smm_buffer *buf;
+   struct smm_group *agrp = grp;
+
+   if (LL_IS_EMPTY(&agrp->unused)) {
+      /* No unused buffer available, so get a new one from pool */
+      buf = get_from_pool(agrp);
+   } else {
+      /* Otherwise, reuse an unused buffer */
+      LL_DEQUEUE(buf, &agrp->unused, use);
+   }
+
+   if (buf != NULL) {
+      /* Add buffer to in-use queue */
+      LL_ENQUEUE(&agrp->inuse, buf, use);
+
+      /* Emit 'init buffer' event */
+      if (smm_instance.cbs.init_buffer != NULL) {
+         if (smm_instance.cbs.init_buffer(smm_instance.cbs.ctx, &buf->props)) {
+            smm_release(buf);
+            buf = NULL;
+         }
+      }
+
+      if (buf != NULL) {
+         /* Remove from history */
+         purge_history(buf);
+
+         /* Add to history a-new */
+         LL_ENQUEUE(&agrp->history, buf, age);
+      }
+   }
+
+   return buf;
+}
+
+
+void *smm_map(smm_buffer_t *buf)
+{
+   struct smm_buffer *mbuf = buf;
+   struct smm_pool *pool = mbuf->props.pool;
+   void *map = pool->map;
+
+   if (pool->map_outdated) {
+      /* Update mapping to current pool size */
+      if (pool->map != NULL) {
+         munmap(pool->map, pool->map_size);
+      }
+
+      map = mmap(NULL,
+                 pool->props.size,
+                 PROT_READ | PROT_WRITE,
+                 MAP_SHARED,
+                 pool->props.fd,
+                 0);
+
+      if (map == MAP_FAILED) {
+         map = NULL;
+         pool->map = NULL;
+      } else {
+         pool->map = map;
+         pool->map_size = pool->props.size;
+         pool->map_outdated = false;
+      }
+   }
+
+   /* Calculate buffer mapping (from offset in pool) */
+   if (map != NULL) {
+      map = (((char *)map) + mbuf->props.offset);
+   }
+
+   return map;
+}
+
+
+void smm_release(smm_buffer_t *buf)
+{
+   struct smm_buffer *rbuf = buf;
+   struct smm_group *grp = rbuf->props.group;
+
+   /* Remove from in-use queue */
+   LL_REMOVE(&grp->inuse, rbuf, use);
+
+   if (rbuf->group_resized) {
+      /* Buffer group was resized while this buffer was in-use, thus it must be
+       * returned to it's pool
+       */
+      rbuf->group_resized = false;
+      return_to_pool(rbuf);
+   } else {
+      /* Move to unused queue */
+      LL_ENQUEUE(&grp->unused, rbuf, use);
+
+      /* Try to limit total number of buffers to preferred number */
+      while ((grp->num_buffers > PREFER_NUM_BUFFERS) &&
+             (!LL_IS_EMPTY(&grp->unused))) {
+         LL_DEQUEUE(rbuf, &grp->unused, use);
+         return_to_pool(rbuf);
+      }
+   }
+}
+
+
+smm_buffer_t *smm_latest(smm_group_t *grp)
+{
+   struct smm_group *lgrp = grp;
+
+   return LL_LAST(&lgrp->history);
+}
+
+
+smm_buffer_t *smm_next(smm_buffer_t *buf)
+{
+   struct smm_buffer *ibuf;
+   struct smm_buffer *nbuf = buf;
+   struct smm_group *grp = nbuf->props.group;
+
+   LL_FOREACH(ibuf, &grp->history, age) {
+      if (ibuf == nbuf) {
+         ibuf = LL_NEXT(ibuf, age);
+         break;
+      }
+   }
+
+   return ibuf;
+}
+
+void purge_history(struct smm_buffer *buf)
+{
+   struct smm_buffer *ibuf;
+   struct smm_group *grp = buf->props.group;
+
+   /* Remove from history (and any older) */
+   LL_FOREACH(ibuf, &grp->history, age) {
+      if (ibuf == buf) {
+         do {
+            LL_DEQUEUE(ibuf, &grp->history, age);
+         } while (ibuf != buf);
+         break;
+      }
+   }
+}
+
+
+size_t calc_buffer_size(struct smm_buffer *buf)
+{
+   size_t buf_sz;
+   struct smm_pool *buf_pool = buf->props.pool;
+
+   if (buf == LL_LAST(&buf_pool->allocd)) {
+      buf_sz = (buf_pool->props.size - buf->props.offset);
+   } else {
+      buf_sz = (LL_NEXT(buf, pool)->props.offset - buf->props.offset);
+   }
+
+   return buf_sz;
+}
+
+
+struct smm_buffer *get_from_pool(struct smm_group *grp)
+{
+   int ret;
+   size_t buf_sz;
+   struct smm_buffer *buf;
+   struct smm_buffer *last = NULL;
+
+   /* TODO: Determine when to allocate a new active pool (i.e. memory shrink) */
+
+   if (smm_instance.active == NULL) {
+      /* Allocate a new active pool */
+      smm_instance.active = alloc_pool();
+      smm_instance.statistics.active_used = 0;
+   }
+
+   if (smm_instance.active == NULL) {
+      buf = NULL;
+   } else {
+      /* Search for a free buffer large enough for allocation */
+      LL_FOREACH(buf, &smm_instance.active->allocd, pool) {
+         last = buf;
+         if (buf->props.group == NULL) {
+            buf_sz = calc_buffer_size(buf);
+            if (buf_sz == grp->size) {
+               break;
+            } else if (buf_sz > grp->size) {
+               if ((buf != LL_LAST(&smm_instance.active->allocd)) &&
+                   (LL_NEXT(buf, pool)->props.group == NULL)) {
+                  /* Pull back next buffer to use unallocated size */
+                  LL_NEXT(buf, pool)->props.offset -= (buf_sz - grp->size);
+               } else {
+                  /* Allocate another buffer to hold unallocated size */
+                  alloc_buffer(buf, buf->props.offset + grp->size);
+               }
+
+               break;
+            }
+         }
+      }
+
+      if (buf == NULL) {
+         /* No buffer found to meet allocation size, expand pool */
+         if ((last != NULL) &&
+             (last->props.group == NULL)) {
+            /* Use last free buffer */
+            buf_sz = (grp->size - buf_sz);
+         } else {
+            /* Allocate new buffer */
+            buf_sz = grp->size;
+            if (last == NULL) {
+               buf = alloc_buffer(NULL, 0);
+            } else {
+               buf = alloc_buffer(last, smm_instance.active->props.size);
+            }
+            last = buf;
+         }
+
+         if (last != NULL) {
+            /* Expand pool backing memory */
+            ret = ftruncate(smm_instance.active->props.fd,
+                            smm_instance.active->props.size + buf_sz);
+            if (ret) {
+               if (buf != NULL) {
+                  free_buffer(buf);
+                  buf = NULL;
+               }
+            } else {
+               smm_instance.active->props.size += buf_sz;
+               smm_instance.active->map_outdated = true;
+               buf = last;
+
+               if (!(smm_instance.active->props.size - buf_sz)) {
+                  /* Emit 'new pool' event */
+                  if ((smm_instance.cbs.new_pool != NULL) &&
+                      (smm_instance.cbs.new_pool(smm_instance.cbs.ctx,
+                                                &smm_instance.active->props))) {
+                     free_buffer(buf);
+                     free_pool(smm_instance.active);
+                     smm_instance.active = NULL;
+                     buf = NULL;
+                  }
+               } else {
+                  /* Emit 'expand pool' event */
+                  if (smm_instance.cbs.expand_pool != NULL) {
+                     smm_instance.cbs.expand_pool(smm_instance.cbs.ctx,
+                                                  &smm_instance.active->props);
+                  }
+               }
+            }
+         }
+      }
+   }
+
+   if (buf != NULL) {
+      /* Set buffer group */
+      memcpy((void *)&buf->props.group, &grp, sizeof(struct smm_group *));
+
+      /* Emit 'new buffer' event */
+      if (smm_instance.cbs.new_buffer != NULL) {
+         if (smm_instance.cbs.new_buffer(smm_instance.cbs.ctx, &buf->props)) {
+            grp = NULL;
+            memcpy((void *)&buf->props.group, &grp, sizeof(struct smm_group *));
+            buf = NULL;
+         }
+      }
+
+      if (buf != NULL) {
+         /* Update active pool usage statistic */
+         smm_instance.statistics.active_used += grp->size;
+         grp->num_buffers++;
+      }
+   }
+
+   return buf;
+}
+
+
+void return_to_pool(struct smm_buffer *buf)
+{
+   struct smm_group *grp = buf->props.group;
+   struct smm_pool *pool = buf->props.pool;
+
+   /* Emit 'free buffer' event */
+   if (smm_instance.cbs.free_buffer != NULL) {
+      smm_instance.cbs.free_buffer(smm_instance.cbs.ctx, &buf->props);
+   }
+
+   /* Buffer is no longer part of history */
+   purge_history(buf);
+
+   /* Buffer is no longer part of group */
+   grp->num_buffers--;
+   grp = NULL;
+   memcpy((void *)&buf->props.group, &grp, sizeof(struct smm_group *));
+
+   /* Update active pool usage statistic */
+   if (smm_instance.active == pool) {
+      smm_instance.statistics.active_used -= calc_buffer_size(buf);
+   }
+
+   /* Coalesce with ungrouped buffers beside this one */
+   if ((buf != LL_LAST(&pool->allocd)) &&
+       (LL_NEXT(buf, pool)->props.group == NULL)) {
+      free_buffer(LL_NEXT(buf, pool));
+   }
+   if ((buf != LL_FIRST(&pool->allocd)) &&
+       (LL_PREV(buf, pool)->props.group == NULL)) {
+      buf = LL_PREV(buf, pool);
+      pool = buf->props.pool;
+      free_buffer(LL_NEXT(buf, pool));
+   }
+
+   /* Free buffer (and pool), if only remaining buffer in pool */
+   if ((buf == LL_FIRST(&pool->allocd)) &&
+       (buf == LL_LAST(&pool->allocd))) {
+      free_buffer(buf);
+
+      /* Emit 'free pool' event */
+      if (smm_instance.cbs.free_pool != NULL) {
+         smm_instance.cbs.free_pool(smm_instance.cbs.ctx, &pool->props);
+      }
+
+      free_pool(pool);
+      if (smm_instance.active == pool) {
+         smm_instance.active = NULL;
+      }
+   }
+}
+
+
+struct smm_pool *alloc_pool(void)
+{
+   struct smm_pool *pool;
+   char name[] = ("/" SMM_FD_NAME "-XXXXX");
+   unsigned char attempts = 0;
+   bool opened = false;
+
+   pool = malloc(sizeof(struct smm_pool));
+   if (pool != NULL) {
+      do {
+         /* A randomized pool name should help reduce collisions */
+         sprintf(name + sizeof(SMM_FD_NAME) + 1, "%05X", rand() & 0xFFFF);
+         pool->props.fd = shm_open(name,
+                                   O_RDWR | O_CREAT | O_EXCL,
+                                   S_IRUSR | S_IWUSR);
+         if (pool->props.fd >= 0) {
+            shm_unlink(name);
+            pool->props.size = 0;
+            pool->map = NULL;
+            pool->map_size = 0;
+            pool->map_outdated = false;
+            LL_INIT(&pool->allocd);
+            opened = true;
+            break;
+         } else {
+            if (errno != EEXIST) {
+               break;
+            }
+            attempts++;
+         }
+      } while (attempts < MAX_NAME_ATTEMPTS);
+
+      if (!opened) {
+         free(pool);
+         pool = NULL;
+      }
+   }
+
+   return pool;
+}
+
+
+void free_pool(struct smm_pool *pool)
+{
+   if (pool->map != NULL) {
+      munmap(pool->map, pool->map_size);
+   }
+
+   close(pool->props.fd);
+   free(pool);
+}
+
+
+struct smm_buffer *alloc_buffer(struct smm_buffer *last, size_t offset)
+{
+   struct smm_buffer *buf;
+   struct smm_buffer_properties initial_props = {
+      {NULL},
+      NULL,
+      smm_instance.active,
+      offset
+   };
+
+   /* Allocate and intialize a new buffer (including linking in to pool) */
+   buf = malloc(sizeof(struct smm_buffer));
+   if (buf != NULL) {
+      memcpy(&buf->props, &initial_props, sizeof(struct smm_buffer_properties));
+      buf->group_resized = false;
+
+      if (last == NULL) {
+         LL_ENQUEUE(&smm_instance.active->allocd, buf, pool);
+      } else {
+         LL_INSERT_AFTER(&smm_instance.active->allocd, last, buf, pool);
+      }
+   }
+
+   return buf;
+}
+
+
+void free_buffer(struct smm_buffer *buf)
+{
+   struct smm_pool *buf_pool = buf->props.pool;
+
+   /* Remove from pool */
+   LL_REMOVE(&buf_pool->allocd, buf, pool);
+   free(buf);
+}
+
+#endif

lib/lv_drivers/wayland/smm.h

@@ -0,0 +1,67 @@
+/**
+ * @file smm.h
+ *
+ */
+#ifndef SMM_H
+#define SMM_H
+#include <stddef.h>
+#include <stdbool.h>
+
+#define SMM_FD_NAME  "lvgl-wayland"
+#define SMM_POOL_TAGS   (1)
+#define SMM_BUFFER_TAGS (2)
+#define SMM_GROUP_TAGS  (1)
+
+#define SMM_POOL_PROPERTIES(p) ((const struct smm_pool_properties *)(p))
+#define SMM_BUFFER_PROPERTIES(b) ((const struct smm_buffer_properties *)(b))
+#define SMM_GROUP_PROPERTIES(g) ((const struct smm_group_properties *)(g))
+#define SMM_TAG(o, n, v) \
+   do { \
+      void **smm_tag = (void **)((char *)o + (n * sizeof(void *))); \
+      *smm_tag = (v); \
+   } while(0)
+
+typedef void smm_pool_t;
+typedef void smm_buffer_t;
+typedef void smm_group_t;
+
+struct smm_events {
+   void *ctx;
+   bool (*new_pool)(void *ctx, smm_pool_t *pool);
+   void (*expand_pool)(void *ctx, smm_pool_t *pool);
+   void (*free_pool)(void *ctx, smm_pool_t *pool);
+   bool (*new_buffer)(void *ctx, smm_buffer_t *buf);
+   bool (*init_buffer)(void *ctx, smm_buffer_t *buf);
+   void (*free_buffer)(void *ctx, smm_buffer_t *buf);
+};
+
+struct smm_pool_properties {
+   void *tag[SMM_POOL_TAGS];
+   size_t size;
+   int fd;
+};
+
+struct smm_buffer_properties {
+   void *tag[SMM_BUFFER_TAGS];
+   smm_group_t *const group;
+   smm_pool_t *const pool;
+   size_t offset;
+};
+
+struct smm_group_properties {
+   void *tag[SMM_GROUP_TAGS];
+};
+
+void smm_init(struct smm_events *evs);
+void smm_setctx(void *ctx);
+void smm_deinit(void);
+smm_group_t *smm_create(void);
+void smm_resize(smm_group_t *grp, size_t sz);
+void smm_destroy(smm_group_t *grp);
+smm_buffer_t *smm_acquire(smm_group_t *grp);
+void *smm_map(smm_buffer_t *buf);
+void smm_release(smm_buffer_t *buf);
+smm_buffer_t *smm_latest(smm_group_t *grp);
+smm_buffer_t *smm_next(smm_buffer_t *buf);
+
+#endif

lib/lv_drivers/wayland/wayland.h

@@ -54,7 +54,6 @@ lv_disp_t * lv_wayland_create_window(lv_coord_t hor_res, lv_coord_t ver_res, cha
                                      lv_wayland_display_close_f_t close_cb);
 void lv_wayland_close_window(lv_disp_t * disp);
 bool lv_wayland_window_is_open(lv_disp_t * disp);
-bool lv_wayland_window_is_flush_pending(lv_disp_t * disp);
 void lv_wayland_window_set_fullscreen(lv_disp_t * disp, bool fullscreen);
 lv_indev_t * lv_wayland_get_pointer(lv_disp_t * disp);
 lv_indev_t * lv_wayland_get_pointeraxis(lv_disp_t * disp);

lib/lv_drivers/win32drv/win32drv.h

@@ -20,7 +20,11 @@
 
 #if USE_WIN32DRV
 
-#include <Windows.h>
+#if LV_USE_USER_DATA == 0
+#error "Support for user data is required by new Win32 driver. Set LV_USE_USER_DATA to 1 in lv_conf.h"
+#endif
+
+#include <windows.h>
 
 #if _MSC_VER >= 1200
  // Disable compilation warnings.
@@ -46,10 +50,50 @@
  *      DEFINES
  *********************/
 
+#define LVGL_SIMULATOR_WINDOW_CLASS L"LVGL.SimulatorWindow"
+
 /**********************
  *      TYPEDEFS
  **********************/
 
+typedef struct _lv_win32_keyboard_queue_item_t
+{
+    SLIST_ENTRY ItemEntry;
+    uint32_t key;
+    lv_indev_state_t state;
+} lv_win32_keyboard_queue_item_t;
+
+typedef struct _lv_win32_window_context_t
+{
+    lv_disp_t* display_device_object;
+    lv_indev_t* mouse_device_object;
+    lv_indev_t* mousewheel_device_object;
+    lv_indev_t* keyboard_device_object;
+
+    lv_coord_t display_hor_res;
+    lv_coord_t display_ver_res;
+    uint32_t display_dpi;
+    HDC display_framebuffer_context_handle;
+    uint32_t* display_framebuffer_base;
+    size_t display_framebuffer_size;
+    lv_disp_draw_buf_t display_buffer;
+    lv_disp_drv_t display_driver;
+
+    lv_indev_state_t mouse_state;
+    lv_point_t mouse_point;
+    lv_indev_drv_t mouse_driver;
+
+    lv_indev_state_t mousewheel_state;
+    int16_t mousewheel_enc_diff;
+    lv_indev_drv_t mousewheel_driver;
+
+    CRITICAL_SECTION keyboard_mutex;
+    PSLIST_HEADER keyboard_queue;
+    uint16_t keyboard_utf16_high_surrogate;
+    uint16_t keyboard_utf16_low_surrogate;
+    lv_indev_drv_t keyboard_driver;
+} lv_win32_window_context_t;
+
 /**********************
  * GLOBAL PROTOTYPES
  **********************/
@@ -63,6 +107,19 @@ EXTERN_C lv_indev_t* lv_win32_encoder_device_object;
 EXTERN_C void lv_win32_add_all_input_devices_to_group(
     lv_group_t* group);
 
+EXTERN_C lv_win32_window_context_t* lv_win32_get_window_context(
+    HWND window_handle);
+
+EXTERN_C bool lv_win32_init_window_class();
+
+EXTERN_C HWND lv_win32_create_display_window(
+    const wchar_t* window_title,
+    lv_coord_t hor_res,
+    lv_coord_t ver_res,
+    HINSTANCE instance_handle,
+    HICON icon_handle,
+    int show_window_mode);
+
 EXTERN_C bool lv_win32_init(
     HINSTANCE instance_handle,
     int show_window_mode,

lib/lv_drivers/x11/x11.c

@@ -0,0 +1,284 @@
+/**
+ * @file x11.c
+ *
+ */
+
+/*********************
+ *      INCLUDES
+ *********************/
+#include "x11.h"
+#if USE_X11
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+
+/*********************
+ *      DEFINES
+ *********************/
+#ifndef KEYBOARD_BUFFER_SIZE
+  #define KEYBOARD_BUFFER_SIZE 64
+#endif
+
+#define MIN(A, B) ((A) < (B) ? (A) : (B))
+#define MAX(A, B) ((A) > (B) ? (A) : (B))
+
+#ifndef X11_OPTIMIZED_SCREEN_UPDATE
+  #define X11_OPTIMIZED_SCREEN_UPDATE 1
+#endif
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ *  STATIC VARIABLES
+ **********************/
+static Display*    display = NULL;
+static Window      window = (XID)-1;
+static GC          gc = NULL;
+static XImage*     ximage = NULL;
+static lv_timer_t* timer = NULL;
+
+static char        kb_buffer[KEYBOARD_BUFFER_SIZE];
+static lv_point_t  mouse_pos = { 0, 0 };
+static bool        left_mouse_btn = false;
+static bool        right_mouse_btn = false;
+static bool        wheel_mouse_btn = false;
+static int16_t     wheel_cnt = 0;
+
+/**********************
+ *      MACROS
+ **********************/
+
+/**********************
+ *   STATIC FUNCTIONS
+ **********************/
+static int predicate(Display* disp, XEvent* evt, XPointer arg) { return 1; }
+
+static void x11_event_handler(lv_timer_t * t)
+{
+    XEvent myevent;
+    KeySym mykey;
+    int n;
+
+    /* handle all outstanding X events */
+    while (XCheckIfEvent(display, &myevent, predicate, NULL)) {
+        switch(myevent.type)
+        {
+        case Expose:
+            if(myevent.xexpose.count==0)
+            {
+                XPutImage(display, window, gc, ximage, 0, 0, 0, 0, LV_HOR_RES, LV_VER_RES);
+            }
+            break;
+        case MotionNotify:
+            mouse_pos.x = myevent.xmotion.x;
+            mouse_pos.y = myevent.xmotion.y;
+            break;
+        case ButtonPress:
+            switch (myevent.xbutton.button)
+            {
+            case Button1:
+                left_mouse_btn = true;
+                break;
+            case Button2:
+                wheel_mouse_btn = true;
+                break;
+            case Button3:
+                right_mouse_btn = true;
+                break;
+            case Button4:
+                wheel_cnt--; // Scrolled up
+                break;
+            case Button5:
+                wheel_cnt++; // Scrolled down
+                break;
+            default:
+                LV_LOG_WARN("unhandled button press : %d", myevent.xbutton.button);
+            }
+            break;
+        case ButtonRelease:
+            switch (myevent.xbutton.button)
+            {
+            case Button1:
+                left_mouse_btn = false;
+                break;
+            case Button2:
+                wheel_mouse_btn = false;
+                break;
+            case Button3:
+                right_mouse_btn = false;
+                break;
+            }
+            break;
+        case KeyPress:
+            n = XLookupString(&myevent.xkey, &kb_buffer[0], sizeof(kb_buffer), &mykey, NULL);
+            kb_buffer[n] = '\0';
+            break;
+        case KeyRelease:
+            break;
+        default:
+            LV_LOG_WARN("unhandled x11 event: %d", myevent.type);
+        }
+    }
+}
+
+static void lv_x11_hide_cursor()
+{
+    XColor black = { .red = 0, .green = 0, .blue = 0 };
+    char empty_data[] = { 0 };
+
+    Pixmap empty_bitmap = XCreateBitmapFromData(display, window, empty_data, 1, 1);
+    Cursor inv_cursor = XCreatePixmapCursor(display, empty_bitmap, empty_bitmap, &black, &black, 0, 0);
+    XDefineCursor(display, window, inv_cursor);
+    XFreeCursor(display, inv_cursor);
+    XFreePixmap(display, empty_bitmap);
+}
+
+
+/**********************
+ *   GLOBAL FUNCTIONS
+ **********************/
+
+void lv_x11_flush(lv_disp_drv_t *disp_drv, const lv_area_t *area, lv_color_t *color_p)
+{
+#if X11_OPTIMIZED_SCREEN_UPDATE
+    static lv_area_t upd_area = {
+        .x1 = 0xFFFF,
+        .x2 = 0,
+        .y1 = 0xFFFF,
+        .y2 = 0
+    };
+
+    /* build display update area until lv_disp_flush_is_last */
+    upd_area.x1 = MIN(upd_area.x1, area->x1);
+    upd_area.x2 = MAX(upd_area.x2, area->x2);
+    upd_area.y1 = MIN(upd_area.y1, area->y1);
+    upd_area.y2 = MAX(upd_area.y2, area->y2);
+#endif // X11_OPTIMIZED_SCREEN_UPDATE
+
+    for (lv_coord_t y = area->y1; y <= area->y2; y++)
+    {
+        uint32_t  dst_offs = area->x1 + y * LV_HOR_RES;
+        uint32_t* dst_data = &((uint32_t*)ximage->data)[dst_offs];
+        for (lv_coord_t x = area->x1; x <= area->x2; x++, color_p++, dst_data++)
+        {
+            *dst_data = lv_color_to32(*color_p);
+        }
+    }
+
+    if (lv_disp_flush_is_last(disp_drv))
+    {
+#if X11_OPTIMIZED_SCREEN_UPDATE
+        /* refresh collected display update area only */
+        lv_coord_t upd_w = upd_area.x2 - upd_area.x1 + 1;
+        lv_coord_t upd_h = upd_area.y2 - upd_area.y1 + 1;
+        XPutImage(display, window, gc, ximage, upd_area.x1, upd_area.y1, upd_area.x1, upd_area.y1, upd_w, upd_h);
+        /* invalidate collected area */
+        upd_area.x1 = 0xFFFF;
+        upd_area.x2 = 0;
+        upd_area.y1 = 0xFFFF;
+        upd_area.y2 = 0;
+#else
+        /* refresh full display */
+        XPutImage(display, window, gc, ximage, 0, 0, 0, 0, LV_HOR_RES, LV_VER_RES);
+#endif
+    }
+    lv_disp_flush_ready(disp_drv);
+}
+
+void lv_x11_get_pointer(lv_indev_drv_t *indev_drv, lv_indev_data_t *data)
+{
+    (void) indev_drv; // Unused
+
+    data->point = mouse_pos;
+    data->state = left_mouse_btn ? LV_INDEV_STATE_PRESSED : LV_INDEV_STATE_RELEASED;
+
+}
+
+void lv_x11_get_mousewheel(lv_indev_drv_t *indev_drv, lv_indev_data_t *data)
+{
+    (void) indev_drv; // Unused
+
+    data->state = wheel_mouse_btn ? LV_INDEV_STATE_PRESSED : LV_INDEV_STATE_RELEASED;
+    data->enc_diff = wheel_cnt;
+    wheel_cnt = 0;
+}
+
+void lv_x11_get_keyboard(lv_indev_drv_t *indev_drv, lv_indev_data_t *data)
+{
+    (void) indev_drv; // Unused
+
+    size_t len = strlen(kb_buffer);
+    if (len > 0)
+    {
+        data->state = LV_INDEV_STATE_PRESSED;
+        data->key = kb_buffer[0];
+        memmove(kb_buffer, kb_buffer + 1, len);
+        data->continue_reading = (len > 0);
+    }
+    else
+    {
+        data->state = LV_INDEV_STATE_RELEASED;
+    }
+}
+
+void lv_x11_init(char const* title, lv_coord_t width, lv_coord_t height)
+{
+    /* setup display/screen */
+    display = XOpenDisplay(NULL);
+    int screen = DefaultScreen(display);
+
+    /* drawing contexts for an window */
+    unsigned long myforeground = BlackPixel(display, screen);
+    unsigned long mybackground = WhitePixel(display, screen);
+
+    /* create window */
+    window = XCreateSimpleWindow(display, DefaultRootWindow(display),
+                                   0, 0, width, height,
+                                   0, myforeground, mybackground);
+
+    /* window manager properties (yes, use of StdProp is obsolete) */
+	XSetStandardProperties(display, window, title, NULL, None, NULL, 0, NULL);
+
+    /* allow receiving mouse and keyboard events */
+    XSelectInput(display, window, PointerMotionMask|ButtonPressMask|ButtonReleaseMask|KeyPressMask|KeyReleaseMask|ExposureMask);
+
+    /* graphics context */
+    gc = XCreateGC(display, window, 0, 0);
+
+    lv_x11_hide_cursor();
+
+    /* create cache XImage */
+    Visual* visual = XDefaultVisual(display, screen);
+    int dplanes = DisplayPlanes(display, screen);
+    ximage = XCreateImage(display, visual, dplanes, ZPixmap, 0,
+                          malloc(width * height * sizeof(uint32_t)), width, height, 32, 0);
+
+    timer = lv_timer_create(x11_event_handler, 10, NULL);
+
+	/* finally bring window on top of the other windows */
+    XMapRaised(display, window);
+}
+
+void lv_x11_deinit(void)
+{
+    lv_timer_del(timer);
+
+    free(ximage->data);
+
+    XDestroyImage(ximage);
+    ximage = NULL;
+
+    XFreeGC(display, gc);
+    gc = NULL;
+    XDestroyWindow(display, window);
+    window = (XID)-1;
+
+    XCloseDisplay(display);
+    display = NULL;
+}
+
+#endif // USE_X11

lib/lv_drivers/x11/x11.h

@@ -0,0 +1,60 @@
+/**
+ * @file x11.h
+ *
+ */
+
+#ifndef X11_H
+#define X11_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*********************
+ *      INCLUDES
+ *********************/
+#ifndef LV_DRV_NO_CONF
+  #ifdef LV_CONF_INCLUDE_SIMPLE
+    #include "lv_drv_conf.h"
+  #else
+    #include "../../lv_drv_conf.h"
+  #endif
+#endif
+
+#if USE_X11
+
+#ifdef LV_LVGL_H_INCLUDE_SIMPLE
+  #include "lvgl.h"
+#else
+  #include "lvgl/lvgl.h"
+#endif
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ * GLOBAL PROTOTYPES
+ **********************/
+void lv_x11_init(char const* title, lv_coord_t width, lv_coord_t height);
+void lv_x11_deinit(void);
+void lv_x11_flush(lv_disp_drv_t *disp_drv, const lv_area_t *area, lv_color_t *color_p);
+void lv_x11_get_pointer(lv_indev_drv_t *indev_drv, lv_indev_data_t *data);
+void lv_x11_get_mousewheel(lv_indev_drv_t *indev_drv, lv_indev_data_t *data);
+void lv_x11_get_keyboard(lv_indev_drv_t *indev_drv, lv_indev_data_t *data);
+
+/**********************
+ *      MACROS
+ **********************/
+
+#endif /* USE_X11 */
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* X11_H */

lib/lvgl/.github/workflows/build_micropython.yml

@@ -8,7 +8,7 @@ jobs:
   build:
     if: ${{ github.event_name != 'pull_request' || github.repository != github.event.pull_request.head.repo.full_name }}
     name: Build ${{ matrix.port }} port
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     continue-on-error: true
     strategy:
       matrix:
@@ -23,7 +23,7 @@ jobs:
     - name: Clone lv_micropython
       run: |
         git clone https://github.com/lvgl/lv_micropython.git .
-        git checkout master
+        git checkout release/v8
     - name: Initialize lv_bindings submodule
       run: git submodule update --init --recursive lib/lv_bindings
     - name: Update ${{ matrix.port }} port submodules

lib/lvgl/.github/workflows/esp_upload_component.yml

@@ -1,23 +1,23 @@
-name: Push LVGL release to Espressif Component Service
-
-# If the commit is tagged, it will be uploaded. Other scenario silently fail.
-on:
-  push:
-    branches:
-      - master
-
-jobs:
-  upload_components:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@master
-        with:
-          submodules: "recursive"
-
-      - name: Upload component to component registry
-        uses: espressif/github-actions/upload_components@master
-        with:
-          name: "lvgl"
-          version: "git"
-          namespace: "lvgl"
-          api_token: ${{ secrets.ESP_IDF_COMPONENT_API_TOKEN }}
+name: Push LVGL release to Espressif Component Service
+
+# If the commit is tagged, it will be uploaded. Other scenario silently fail.
+on:
+  push:
+    tags:
+      - v*
+
+jobs:
+  upload_components:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: "recursive"
+
+      - name: Upload component to component registry
+        uses: espressif/upload-components-ci-action@v1
+        with:
+          name: "lvgl"
+          version: ${{ github.ref_name }}
+          namespace: "lvgl"
+          api_token: ${{ secrets.ESP_IDF_COMPONENT_API_TOKEN }}

lib/lvgl/Kconfig

@@ -42,11 +42,9 @@ menu "LVGL configuration"
 
         config LV_COLOR_SCREEN_TRANSP
             bool "Enable more complex drawing routines to manage screens transparency."
-            depends on LV_COLOR_DEPTH_32
             help
                 Can be used if the UI is above another layer, e.g. an OSD menu or video player.
-                Requires `LV_COLOR_DEPTH = 32` colors and the screen's `bg_opa` should be set to
-                non LV_OPA_COVER value
+                The screen's `bg_opa` should be set to non LV_OPA_COVER value
 
         config LV_COLOR_MIX_ROUND_OFS
             int "Adjust color mix functions rounding"
@@ -230,6 +228,16 @@ menu "LVGL configuration"
                     Must be defined to include path of CMSIS header of target processor
                     e.g. "stm32f769xx.h" or "stm32f429xx.h"
 
+            config LV_USE_GPU_RA6M3_G2D
+                bool "Enable RA6M3 G2D GPU."
+            config LV_GPU_RA6M3_G2D_INCLUDE
+                string "include path of target processor"
+                depends on LV_USE_GPU_RA6M3_G2D
+                default "hal_data.h"
+                help
+                    Must be defined to include path of target processor
+                    e.g. "hal_data.h"
+
             config LV_USE_GPU_SWM341_DMA2D
                 bool "Enable SWM341 DMA2D GPU."
             config LV_GPU_SWM341_DMA2D_INCLUDE
@@ -913,7 +921,8 @@ menu "LVGL configuration"
             string "Set the working directory"
             depends on LV_USE_FS_STDIO
         config LV_FS_STDIO_CACHE_SIZE
-            string ">0 to cache this number of bytes in lv_fs_read()"
+            int ">0 to cache this number of bytes in lv_fs_read()"
+            default 0
             depends on LV_USE_FS_STDIO
 
         config LV_USE_FS_POSIX
@@ -955,6 +964,17 @@ menu "LVGL configuration"
             default 0
             depends on LV_USE_FS_FATFS
 
+        config LV_USE_FS_LITTLEFS
+            bool "File system on top of LittleFS"
+        config LV_FS_LITTLEFS_LETTER
+            int "Set an upper cased letter on which the drive will accessible (e.g. 'A' i.e. 65)"
+            default 0
+            depends on LV_USE_FS_LITTLEFS
+        config LV_FS_LITTLEFS_CACHE_SIZE
+            int ">0 to cache this number of bytes in lv_fs_read()"
+            default 0
+            depends on LV_USE_FS_LITTLEFS
+
         config LV_USE_PNG
             bool "PNG decoder library"
 
@@ -991,6 +1011,13 @@ menu "LVGL configuration"
             endmenu
         endif
 
+        config LV_USE_TINY_TTF
+            bool "Tiny TTF library"
+        config LV_TINY_TTF_FILE_SUPPORT
+            bool "Load TTF data from files"
+            depends on LV_USE_TINY_TTF
+            default n
+
         config LV_USE_RLOTTIE
             bool "Lottie library"
 

lib/lvgl/demos/benchmark/assets/img_benchmark_cogwheel_rgb565a8.c

@@ -1,9 +1,4 @@
-#if defined(LV_LVGL_H_INCLUDE_SIMPLE)
-#include "lvgl.h"
-#else
-#include "lvgl/lvgl.h"
-#endif
-
+#include "../../../lvgl.h"
 
 #ifndef LV_ATTRIBUTE_MEM_ALIGN
 #define LV_ATTRIBUTE_MEM_ALIGN

lib/lvgl/demos/benchmark/lv_demo_benchmark.c

@@ -89,7 +89,7 @@ LV_FONT_DECLARE(lv_font_benchmark_montserrat_16_compr_az);
 LV_FONT_DECLARE(lv_font_benchmark_montserrat_28_compr_az);
 
 static void monitor_cb(lv_disp_drv_t * drv, uint32_t time, uint32_t px);
-static void scene_next_task_cb(lv_timer_t * timer);
+static void next_scene_timer_cb(lv_timer_t * timer);
 static void rect_create(lv_style_t * style);
 static void img_create(lv_style_t * style, const void * src, bool rotate, bool zoom, bool aa);
 static void txt_create(lv_style_t * style);
@@ -636,7 +636,7 @@ static lv_obj_t * scene_bg;
 static lv_obj_t * title;
 static lv_obj_t * subtitle;
 static uint32_t rnd_act;
-
+static lv_timer_t * next_scene_timer;
 
 static const uint32_t rnd_map[] = {
     0xbd13204f, 0x67d8167f, 0x20211c99, 0xb0a7cc05,
@@ -708,9 +708,21 @@ void lv_demo_benchmark(void)
     benchmark_init();
 
     /*Manually start scenes*/
-    scene_next_task_cb(NULL);
+    next_scene_timer_cb(NULL);
 }
 
+void lv_demo_benchmark_close(void)
+{
+    if(next_scene_timer) lv_timer_del(next_scene_timer);
+    next_scene_timer = NULL;
+
+    lv_anim_del(NULL, NULL);
+
+    lv_style_reset(&style_common);
+
+    lv_obj_clean(lv_scr_act());
+
+}
 
 void lv_demo_benchmark_run_scene(int_fast16_t scene_no)
 {
@@ -725,7 +737,8 @@ void lv_demo_benchmark_run_scene(int_fast16_t scene_no)
     scene_act = scene_no >> 1;
 
     if(scenes[scene_act].create_cb) {
-        lv_label_set_text_fmt(title, "%"LV_PRId32"/%d: %s%s", scene_act * 2 + (opa_mode ? 1 : 0), (int)(dimof(scenes) * 2) - 2,
+        lv_label_set_text_fmt(title, "%"LV_PRId32"/%"LV_PRId32": %s%s", scene_act * 2 + (opa_mode ? 1 : 0),
+                              (int32_t)(dimof(scenes) * 2) - 2,
                               scenes[scene_act].name, opa_mode ? " + opa" : "");
         lv_label_set_text(subtitle, "");
 
@@ -972,11 +985,13 @@ static void report_cb(lv_timer_t * timer)
     }
 }
 
-static void scene_next_task_cb(lv_timer_t * timer)
+static void next_scene_timer_cb(lv_timer_t * timer)
 {
     LV_UNUSED(timer);
     lv_obj_clean(scene_bg);
 
+    next_scene_timer = NULL;
+
     if(opa_mode) {
         if(scene_act >= 0) {
             if(scenes[scene_act].time_sum_opa == 0) scenes[scene_act].time_sum_opa = 1;
@@ -995,8 +1010,8 @@ static void scene_next_task_cb(lv_timer_t * timer)
     }
 
     if(scenes[scene_act].create_cb) {
-        lv_label_set_text_fmt(title, "%"LV_PRId32"/%d: %s%s", scene_act * 2 + (opa_mode ? 1 : 0),
-                              (int)(dimof(scenes) * 2) - 2,  scenes[scene_act].name, opa_mode ? " + opa" : "");
+        lv_label_set_text_fmt(title, "%"LV_PRId32"/%"LV_PRId32": %s%s", scene_act * 2 + (opa_mode ? 1 : 0),
+                              (int32_t)(dimof(scenes) * 2) - 2,  scenes[scene_act].name, opa_mode ? " + opa" : "");
         if(opa_mode) {
             lv_label_set_text_fmt(subtitle, "Result of \"%s\": %"LV_PRId32" FPS", scenes[scene_act].name,
                                   scenes[scene_act].fps_normal);
@@ -1013,8 +1028,8 @@ static void scene_next_task_cb(lv_timer_t * timer)
 
         rnd_reset();
         scenes[scene_act].create_cb();
-        lv_timer_t * t = lv_timer_create(scene_next_task_cb, SCENE_TIME, NULL);
-        lv_timer_set_repeat_count(t, 1);
+        next_scene_timer = lv_timer_create(next_scene_timer_cb, SCENE_TIME, NULL);
+        lv_timer_set_repeat_count(next_scene_timer, 1);
 
     }
     /*Ready*/

lib/lvgl/demos/benchmark/lv_demo_benchmark.h

@@ -30,6 +30,8 @@ typedef void finished_cb_t(void);
  **********************/
 void lv_demo_benchmark(void);
 
+void lv_demo_benchmark_close(void);
+
 void lv_demo_benchmark_run_scene(int_fast16_t scene_no);
 
 void lv_demo_benchmark_set_finished_cb(finished_cb_t * finished_cb);

lib/lvgl/demos/keypad_encoder/lv_demo_keypad_encoder.c

@@ -46,8 +46,11 @@ static lv_obj_t * t2;
 
 void lv_demo_keypad_encoder(void)
 {
-    g = lv_group_create();
-    lv_group_set_default(g);
+    g = lv_group_get_default();
+    if(g == NULL) {
+        g = lv_group_create();
+        lv_group_set_default(g);
+    }
 
     lv_indev_t * cur_drv = NULL;
     for(;;) {
@@ -76,6 +79,12 @@ void lv_demo_keypad_encoder(void)
     msgbox_create();
 }
 
+void lv_demo_keypad_encoder_close(void)
+{
+    lv_obj_clean(lv_scr_act());
+    lv_obj_clean(lv_layer_top());
+}
+
 /**********************
  *   STATIC FUNCTIONS
  **********************/

lib/lvgl/demos/keypad_encoder/lv_demo_keypad_encoder.h

@@ -27,6 +27,7 @@ extern "C" {
  * GLOBAL PROTOTYPES
  **********************/
 void lv_demo_keypad_encoder(void);
+void lv_demo_keypad_encoder_close(void);
 
 /**********************
  *      MACROS

lib/lvgl/demos/music/lv_demo_music.c

@@ -103,6 +103,12 @@ static const uint32_t time_list[] = {
     2 * 60 + 19,
 };
 
+#if LV_DEMO_MUSIC_AUTO_PLAY
+    static lv_timer_t * auto_step_timer;
+#endif
+
+static lv_color_t original_screen_bg_color;
+
 /**********************
  *      MACROS
  **********************/
@@ -113,14 +119,31 @@ static const uint32_t time_list[] = {
 
 void lv_demo_music(void)
 {
+    original_screen_bg_color = lv_obj_get_style_bg_color(lv_scr_act(), 0);
     lv_obj_set_style_bg_color(lv_scr_act(), lv_color_hex(0x343247), 0);
 
     list = _lv_demo_music_list_create(lv_scr_act());
     ctrl = _lv_demo_music_main_create(lv_scr_act());
 
 #if LV_DEMO_MUSIC_AUTO_PLAY
-    lv_timer_create(auto_step_cb, 1000, NULL);
+    auto_step_timer = lv_timer_create(auto_step_cb, 1000, NULL);
+#endif
+}
+
+void lv_demo_music_close(void)
+{
+    /*Delete all aniamtions*/
+    lv_anim_del(NULL, NULL);
+
+#if LV_DEMO_MUSIC_AUTO_PLAY
+    lv_timer_del(auto_step_timer);
 #endif
+    _lv_demo_music_list_close();
+    _lv_demo_music_main_close();
+
+    lv_obj_clean(lv_scr_act());
+
+    lv_obj_set_style_bg_color(lv_scr_act(), original_screen_bg_color, 0);
 }
 
 const char * _lv_demo_music_get_title(uint32_t track_id)

lib/lvgl/demos/music/lv_demo_music.h

@@ -36,6 +36,8 @@ extern "C" {
  **********************/
 
 void lv_demo_music(void);
+void lv_demo_music_close(void);
+
 const char * _lv_demo_music_get_title(uint32_t track_id);
 const char * _lv_demo_music_get_artist(uint32_t track_id);
 const char * _lv_demo_music_get_genre(uint32_t track_id);

lib/lvgl/demos/music/lv_demo_music_list.c

@@ -130,6 +130,19 @@ lv_obj_t * _lv_demo_music_list_create(lv_obj_t * parent)
     return list;
 }
 
+
+void _lv_demo_music_list_close(void)
+{
+    lv_style_reset(&style_scrollbar);
+    lv_style_reset(&style_btn);
+    lv_style_reset(&style_btn_pr);
+    lv_style_reset(&style_btn_chk);
+    lv_style_reset(&style_btn_dis);
+    lv_style_reset(&style_title);
+    lv_style_reset(&style_artist);
+    lv_style_reset(&style_time);
+}
+
 void _lv_demo_music_list_btn_check(uint32_t track_id, bool state)
 {
     lv_obj_t * btn = lv_obj_get_child(list, track_id);

lib/lvgl/demos/music/lv_demo_music_list.h

@@ -28,6 +28,8 @@ extern "C" {
  * GLOBAL PROTOTYPES
  **********************/
 lv_obj_t * _lv_demo_music_list_create(lv_obj_t * parent);
+void _lv_demo_music_list_close(void);
+
 void _lv_demo_music_list_btn_check(uint32_t track_id, bool state);
 
 /**********************

lib/lvgl/demos/music/lv_demo_music_main.c

@@ -60,7 +60,7 @@ static void prev_click_event_cb(lv_event_t * e);
 static void next_click_event_cb(lv_event_t * e);
 static void timer_cb(lv_timer_t * t);
 static void track_load(uint32_t id);
-static void stop_start_anim(lv_timer_t * t);
+static void stop_start_anim_timer_cb(lv_timer_t * t);
 static void spectrum_end_cb(lv_anim_t * a);
 static void album_fade_anim_cb(void * var, int32_t v);
 static int32_t get_cos(int32_t deg, int32_t a);
@@ -84,6 +84,7 @@ static uint32_t spectrum_lane_ofs_start = 0;
 static uint32_t bar_rot = 0;
 static uint32_t time_act;
 static lv_timer_t  * sec_counter_timer;
+static lv_timer_t * stop_start_anim_timer;
 static const lv_font_t * font_small;
 static const lv_font_t * font_large;
 static uint32_t track_id;
@@ -232,8 +233,8 @@ lv_obj_t * _lv_demo_music_main_create(lv_obj_t * parent)
 
     start_anim = true;
 
-    lv_timer_t * timer = lv_timer_create(stop_start_anim, INTRO_TIME + 6000, NULL);
-    lv_timer_set_repeat_count(timer, 1);
+    stop_start_anim_timer = lv_timer_create(stop_start_anim_timer_cb, INTRO_TIME + 6000, NULL);
+    lv_timer_set_repeat_count(stop_start_anim_timer, 1);
 
     lv_anim_init(&a);
     lv_anim_set_path_cb(&a, lv_anim_path_bounce);
@@ -292,6 +293,12 @@ lv_obj_t * _lv_demo_music_main_create(lv_obj_t * parent)
     return main_cont;
 }
 
+void _lv_demo_music_main_close(void)
+{
+    if(stop_start_anim_timer) lv_timer_del(stop_start_anim_timer);
+    lv_timer_del(sec_counter_timer);
+}
+
 void _lv_demo_music_album_next(bool next)
 {
     uint32_t id = track_id;
@@ -762,7 +769,7 @@ static void spectrum_draw_event_cb(lv_event_t * e)
         lv_obj_t * obj = lv_event_get_target(e);
         lv_draw_ctx_t * draw_ctx = lv_event_get_draw_ctx(e);
 
-        lv_opa_t opa = lv_obj_get_style_opa(obj, LV_PART_MAIN);
+        lv_opa_t opa = lv_obj_get_style_opa_recursive(obj, LV_PART_MAIN);
         if(opa < LV_OPA_MIN) return;
 
         lv_point_t poly[4];
@@ -990,10 +997,11 @@ static void spectrum_end_cb(lv_anim_t * a)
 }
 
 
-static void stop_start_anim(lv_timer_t * t)
+static void stop_start_anim_timer_cb(lv_timer_t * t)
 {
     LV_UNUSED(t);
     start_anim = false;
+    stop_start_anim_timer = NULL;
     lv_obj_refresh_ext_draw_size(spectrum_obj);
 }
 

lib/lvgl/demos/music/lv_demo_music_main.h

@@ -28,6 +28,8 @@ extern "C" {
  * GLOBAL PROTOTYPES
  **********************/
 lv_obj_t * _lv_demo_music_main_create(lv_obj_t * parent);
+void _lv_demo_music_main_close(void);
+
 void _lv_demo_music_play(uint32_t id);
 void _lv_demo_music_resume(void);
 void _lv_demo_music_pause(void);

lib/lvgl/demos/stress/lv_demo_stress.c

@@ -25,7 +25,7 @@ static void msgbox_del(lv_timer_t * tmr);
 static void set_y_anim(void * obj, int32_t v);
 static void set_width_anim(void * obj, int32_t v);
 static void arc_set_end_angle_anim(void * obj, int32_t v);
-static void obj_test_task_cb(lv_timer_t * tmr);
+static void obj_test_timer_cb(lv_timer_t * tmr);
 
 /**********************
  *  STATIC VARIABLES
@@ -34,6 +34,10 @@ static lv_obj_t * main_page;
 static lv_obj_t * ta;
 static const char * mbox_btns[] = {"Ok", "Cancel", ""};
 static uint32_t mem_free_start = 0;
+static lv_timer_t * obj_test_timer;
+static int16_t state;
+static lv_timer_t * msgbox_tmr;
+
 /**********************
  *      MACROS
  **********************/
@@ -45,23 +49,34 @@ static uint32_t mem_free_start = 0;
 void lv_demo_stress(void)
 {
     LV_LOG_USER("Starting stress test. (< 100 bytes permanent memory leak is normal due to fragmentation)");
-    lv_timer_create(obj_test_task_cb, LV_DEMO_STRESS_TIME_STEP, NULL);
+    obj_test_timer = lv_timer_create(obj_test_timer_cb, LV_DEMO_STRESS_TIME_STEP, NULL);
+    state = -1;
+}
+
+void lv_demo_stress_close(void)
+{
+    lv_timer_del(obj_test_timer);
+    obj_test_timer = NULL;
+    if(msgbox_tmr) {
+        lv_timer_del(msgbox_tmr);
+        msgbox_tmr = NULL;
+    }
+
+    lv_obj_clean(lv_scr_act());
+    lv_obj_clean(lv_layer_top());
 }
 
 /**********************
  *   STATIC FUNCTIONS
  **********************/
 
-static void obj_test_task_cb(lv_timer_t * tmr)
+static void obj_test_timer_cb(lv_timer_t * tmr)
 {
     (void) tmr;    /*Unused*/
-    static int16_t state = -1;
 
     lv_anim_t a;
     lv_obj_t * obj;
 
-    //    printf("step start: %d\n", state);
-
     switch(state) {
         case -1: {
                 lv_res_t res = lv_mem_test();
@@ -246,8 +261,7 @@ static void obj_test_task_cb(lv_timer_t * tmr)
 
         case 14:
             obj = lv_msgbox_create(NULL, "Title", "Some text on the message box with average length", mbox_btns, true);
-
-            lv_timer_t * msgbox_tmr = lv_timer_create(msgbox_del, LV_DEMO_STRESS_TIME_STEP * 5 + 30, obj);
+            msgbox_tmr = lv_timer_create(msgbox_del, LV_DEMO_STRESS_TIME_STEP * 5 + 30, obj);
             lv_timer_set_repeat_count(msgbox_tmr, 1);
             lv_obj_align(obj, LV_ALIGN_RIGHT_MID, -10, 0);
             break;
@@ -439,6 +453,7 @@ static void auto_del(lv_obj_t * obj, uint32_t delay)
 
 static void msgbox_del(lv_timer_t * tmr)
 {
+    msgbox_tmr = NULL;
     lv_msgbox_close(tmr->user_data);
 }
 

lib/lvgl/demos/stress/lv_demo_stress.h

@@ -30,6 +30,8 @@ extern "C" {
  **********************/
 void lv_demo_stress(void);
 
+void lv_demo_stress_close(void);
+
 /**********************
  *      MACROS
  **********************/

lib/lvgl/demos/widgets/lv_demo_widgets.c

@@ -86,6 +86,8 @@ static uint32_t session_desktop = 1000;
 static uint32_t session_tablet = 1000;
 static uint32_t session_mobile = 1000;
 
+static lv_timer_t * meter2_timer;
+
 /**********************
  *      MACROS
  **********************/
@@ -196,6 +198,22 @@ void lv_demo_widgets(void)
     color_changer_create(tv);
 }
 
+void lv_demo_widgets_close(void)
+{
+    /*Delete all animation*/
+    lv_anim_del(NULL, NULL);
+
+    lv_timer_del(meter2_timer);
+    meter2_timer = NULL;
+
+    lv_obj_clean(lv_scr_act());
+
+    lv_style_reset(&style_text_muted);
+    lv_style_reset(&style_title);
+    lv_style_reset(&style_icon);
+    lv_style_reset(&style_bullet);
+}
+
 /**********************
  *   STATIC FUNCTIONS
  **********************/
@@ -205,6 +223,7 @@ static void profile_create(lv_obj_t * parent)
     lv_obj_t * panel1 = lv_obj_create(parent);
     lv_obj_set_height(panel1, LV_SIZE_CONTENT);
 
+
     LV_IMG_DECLARE(img_demo_widgets_avatar);
     lv_obj_t * avatar = lv_img_create(panel1);
     lv_img_set_src(avatar, &img_demo_widgets_avatar);
@@ -698,7 +717,7 @@ static void analytics_create(lv_obj_t * parent)
     lv_meter_set_indicator_start_value(meter2, meter2_indic[2], 70);
     lv_meter_set_indicator_end_value(meter2, meter2_indic[2], 99);
 
-    lv_timer_create(meter2_timer_cb, 100, meter2_indic);
+    meter2_timer = lv_timer_create(meter2_timer_cb, 100, meter2_indic);
 
     meter3 = create_meter_box(parent, "Network Speed", "Low speed", "Normal Speed", "High Speed");
     if(disp_size < DISP_LARGE) lv_obj_add_flag(lv_obj_get_parent(meter3), LV_OBJ_FLAG_FLEX_IN_NEW_TRACK);

lib/lvgl/demos/widgets/lv_demo_widgets.h

@@ -27,6 +27,7 @@ extern "C" {
  * GLOBAL PROTOTYPES
  **********************/
 void lv_demo_widgets(void);
+void lv_demo_widgets_close(void);
 
 /**********************
  *      MACROS

lib/lvgl/docs/CHANGELOG.md

@@ -1,5 +1,328 @@
 # Changelog
 
+## [v8.3.11](https://github.com/lvgl/lvgl/compare/v8.3.11...v8.3.10) 6 December 2023
+
+### New Features
+
+- feat(table): add user_data to table cells [`4767`](https://github.com/lvgl/lvgl/pull/4767)
+- feat(tiny_ttf): backport Tiny TTF to lvgl 8 [`4727`](https://github.com/lvgl/lvgl/pull/4727)
+- feat(littlefs): add lv_fs_littlefs system as a driver [`4677`](https://github.com/lvgl/lvgl/pull/4677)
+
+### Fixes
+
+- fix(obj): readjust scroll after layout when child removed [`4921`](https://github.com/lvgl/lvgl/pull/4921)
+- fix(rt-thread): fix create lvgl thread problem [`4862`](https://github.com/lvgl/lvgl/pull/4862)
+- fix(obj): fix arduino compile warnings [`4807`](https://github.com/lvgl/lvgl/pull/4807)
+- fix(table):fix issue with abnormal string output of 'lv_table_set_cell_value_fmt' [`4804`](https://github.com/lvgl/lvgl/pull/4804)
+- fix(table) user data API functions renamed [`4769`](https://github.com/lvgl/lvgl/pull/4769)
+- fix(ime_pinyin): keep cursor in the textarea when a candidate is pressed [`4731`](https://github.com/lvgl/lvgl/pull/4731)
+- fix(draw_needles): changed needle line draw start point from scale ce… [`4682`](https://github.com/lvgl/lvgl/pull/4682)
+- fix(arc): handle click outside background angle range (#4586) [`4667`](https://github.com/lvgl/lvgl/pull/4667)
+- fix(meter):  fix minor issues [`4657`](https://github.com/lvgl/lvgl/pull/4657)
+- fix(draw): fix compiler error in lv_draw_sw_transform.c #2 [`4612`](https://github.com/lvgl/lvgl/pull/4612)
+- fix(dropdown): avoid partial match in lv_dropdown_get_option_index [`4598`](https://github.com/lvgl/lvgl/pull/4598)
+- fix(dropdown): reset char_i = 0, avoid access overflow [`4589`](https://github.com/lvgl/lvgl/pull/4589)
+- fix(btnmatrix): set LV_BTNMATRIX_BTN_NONE when clicking of disabled button (#4571) [`4578`](https://github.com/lvgl/lvgl/pull/4578)
+- fix(qrcode): use LV_ASSERT instead of assert [`1840dec`](https://github.com/lvgl/lvgl/commit/1840decb4136ba01552fcb7cedb0ff759824e2fd)
+- fix: fix warning in lv_draw_sw_letter.c [`d22cda3`](https://github.com/lvgl/lvgl/commit/d22cda3cdb15cee95763491db95753980846d9f9)
+- fix(arc): fix setting value by click [`20b6199`](https://github.com/lvgl/lvgl/commit/20b6199ba90319942c3cd91f2c727da6cd40cd2d)
+- fix(disp): fix infinite recursive SCREEN_LOADED events [`ef76206`](https://github.com/lvgl/lvgl/commit/ef76206c75ea9de26407534a9ce1079dc8e750e3)
+- fix(keyboard): add '&' character [`d20bd1c`](https://github.com/lvgl/lvgl/commit/d20bd1ca397ff954167dd496cf1a78da8814f602)
+- fix(draw): fix scaling rectangle parts with opa [`7a8fcbf`](https://github.com/lvgl/lvgl/commit/7a8fcbfd3458739cbe64b29767a969ece9542039)
+
+### Docs
+
+- docs(obj): fix wording [`4625`](https://github.com/lvgl/lvgl/pull/4625)
+- docs(label): update text for recoloring [`4606`](https://github.com/lvgl/lvgl/pull/4606)
+- docs: fix typo [`9fbac75`](https://github.com/lvgl/lvgl/commit/9fbac7570bdec18ddbb157b59f5e26a2ebdf5daf)
+
+### Others
+
+- chore(cmsis-pack): prepare for v8.3.11 [`4936`](https://github.com/lvgl/lvgl/pull/4936)
+- chore(cmake): add support for user-specified lv_conf.h path [`4689`](https://github.com/lvgl/lvgl/pull/4689)
+- STM32U5 DMA2D support (8.3) [`4643`](https://github.com/lvgl/lvgl/pull/4643)
+- backport: fix(lv_disp): fix lv_scr_load_anim being called twice quickly [`4629`](https://github.com/lvgl/lvgl/pull/4629)
+- chore(lv_draw_sw_letter.c): Fix print format [`4615`](https://github.com/lvgl/lvgl/pull/4615)
+- chore: fix compile error [`7568df7`](https://github.com/lvgl/lvgl/commit/7568df77d16ecbf2242b2bc290dc8fc0eb29cf5a)
+
+## [v8.3.10](https://github.com/lvgl/lvgl/compare/v8.3.10...v8.3.9) 20 September 2023
+
+### New Features
+
+- feat(disp): add double buffered direct-mode efficient sync algorithm (v8.3) [`4497`](https://github.com/lvgl/lvgl/pull/4497)
+- feat(style): backport opa_layered [`6548ea0`](https://github.com/lvgl/lvgl/commit/6548ea0f291be8a97afb3c4d7dcabbe465ae5a04)
+
+
+### Fixes
+
+- fix: build on Windows (MinGW environment) [`4538`](https://github.com/lvgl/lvgl/pull/4538)
+- fix(docs): dropdown: fix function name in description of static options [`4535`](https://github.com/lvgl/lvgl/pull/4535)
+- fix: do not copy invalid areas if not double buffered mode [`4526`](https://github.com/lvgl/lvgl/pull/4526)
+- fix(sdl): add missing parameter in lv_draw_sdl_composite_texture_obtain [`4490`](https://github.com/lvgl/lvgl/pull/4490)
+- fix(dropdown): position to the selected item in lv_dropdown_set_selected [`f174589`](https://github.com/lvgl/lvgl/commit/f174589240b099a349e54ba09aa9b39c2b347341)
+- fix(vglite): be sure end_angle > start_angle in arc drawing [`01cd1fe`](https://github.com/lvgl/lvgl/commit/01cd1fed9db974aa616a6289a29171b7a971cd89)
+- fix(btnmatrix): fix tapping just outside a button in a buttonmatrix [`8063fac`](https://github.com/lvgl/lvgl/commit/8063fac793b0a09add1e57c1115b734659274e6f)
+
+
+### Docs
+
+- docs(calendar): update according to v8.2 changes [`a296456`](https://github.com/lvgl/lvgl/commit/a296456591f6ff0e3b3ae6cdcdd9ec5b1711c357)
+- docs(simulator): remove SDL support from the Visual Studio project [`bcebafe`](https://github.com/lvgl/lvgl/commit/bcebafe4fb72e336b7dedca89c07e334427eef8d)
+
+### CI and tests
+
+- ci: update screenshot compare from v9 to automatically create missing reference images [`fd21ed0`](https://github.com/lvgl/lvgl/commit/fd21ed0eb82bacb1e482180ab0aaed6a667f000d)
+- ci(dropdown): fix test [`5fc488a`](https://github.com/lvgl/lvgl/commit/5fc488a088639dbfb5eb44f65b05e13b6ba881bf)
+
+### Others
+
+- chore(cmsis-pack): create cmsis-pack for v8.3.10 [`4572`](https://github.com/lvgl/lvgl/pull/4572)
+- Update screen object opacity function documentation [`4505`](https://github.com/lvgl/lvgl/pull/4505)
+- demo(sress): fix issues when the stress test is opened/clsoed multiple times [`1c5df6c`](https://github.com/lvgl/lvgl/commit/1c5df6c665b0d5f6f346d45b13109ff1f6ea78a6)
+- chore: code formatting [`eb87767`](https://github.com/lvgl/lvgl/commit/eb87767cc65fec93f9cc4f87a1f8fb5b32f7e41d)
+
+
+## [v8.3.9](https://github.com/lvgl/lvgl/compare/v8.3.9...v8.3.8) 6 August 2023
+
+
+### Fixes
+
+- fix(decoder): fix LV_IMG_CF_ALPHA_8BIT bin file decoder [`4406`](https://github.com/lvgl/lvgl/pull/4406)
+- fix(config): fix typo in LV_USE_PERF_MONITOR and LV_USE_MEM_MONITOR [`4403`](https://github.com/lvgl/lvgl/pull/4403)
+- fix(attr): refactor LV_ATTRIBUTE_* for function attributes [`4404`](https://github.com/lvgl/lvgl/pull/4404)
+- fix(font): fix optimizer issue in  lv_font_fmt_txt.c [`4385`](https://github.com/lvgl/lvgl/pull/4385)
+- fix(btnmatrix): Hide button matrix when all buttons hidden [`65f1c93`](https://github.com/lvgl/lvgl/commit/65f1c9305e1b13356010524da4764fe20fe93030)
+- fix(obj) prevent hidden objects keeping focus [`375b3b5`](https://github.com/lvgl/lvgl/commit/375b3b5d3ef2ea8c52f971a1bf20998be7940d5e)
+- fix(btnmatrix): Fix typo in previous commit! [`29ed7c5`](https://github.com/lvgl/lvgl/commit/29ed7c5717f6cfbca5ce888bf4497221525aae85)
+- fix(tabview): fix warning [`223dc1c`](https://github.com/lvgl/lvgl/commit/223dc1cf9d1cad0f40caf244eb435af0871f4153)
+- fix(indev): fix warnings when loggin coordinates is enabled [`645006e`](https://github.com/lvgl/lvgl/commit/645006e35195cab3354f34a1a8cbc8c5ed0fdfad)
+- fix: use const lv_img_dsc_t * dsc function parameter in lv_img_buf.h/ [`4f102d7`](https://github.com/lvgl/lvgl/commit/4f102d7b6b2e9f9fa68ab7b976d93762107549a4)
+- fix(chart): fix lv_chart_get_point_pos_by_id [`f9ffcc9`](https://github.com/lvgl/lvgl/commit/f9ffcc9d8e11beb369dcbab0945ca85eab8f77b2)
+- fix(imgbtn): support LV_OBJ_FLAG_CHECKABLE [`385d999`](https://github.com/lvgl/lvgl/commit/385d999a4a8164fcde6ae05f6a5daa5d5c209dd3)
+
+
+### Docs
+
+- docs(disp): metined that rotation rotates the touch coordinates too [`810852b`](https://github.com/lvgl/lvgl/commit/810852b41be5df66fd7b80f8af69f8b579d142ea)
+
+
+### Others
+
+- demos: add lv_demo_..._close() functions for each demo [`91038a9`](https://github.com/lvgl/lvgl/commit/91038a99e82a2522f693c7cdc77e9e7a672ee9ed)
+
+
+## [v8.3.8](https://github.com/lvgl/lvgl/compare/v8.3.8...v8.3.7) 5 July 2023
+
+### New Features
+
+- feat(rt-thread): make the rt-thread env recursively glob the UI files [`8b83fe7`](https://github.com/lvgl/lvgl/commit/8b83fe7ea53a597cdbae8204d0aa9be8ad3d2b89)
+
+### Performance
+
+- perf(pxp, vglite): improve performance and add more features [`4222`](https://github.com/lvgl/lvgl/pull/4222)
+
+### Fixes
+
+- fix(stm32): static function prototypes moved from .h to .c [`4276`](https://github.com/lvgl/lvgl/pull/4276)
+- fix(png): fix decode image size and some warnings [`4248`](https://github.com/lvgl/lvgl/pull/4248)
+- fix(bidi): add more Hebrew checks to RTL characters set (#4171) [`4239`](https://github.com/lvgl/lvgl/pull/4239)
+- fix(img): fix getting the image type on big endian systems [`4215`](https://github.com/lvgl/lvgl/pull/4215)
+- fix(sdl): destroy texture after use if not stored in cache [`4173`](https://github.com/lvgl/lvgl/pull/4173)
+
+- fix:(BtnMatrix) Backport https://github.com/lvgl/lvgl/pull/4185 [`cb602ea`](https://github.com/lvgl/lvgl/commit/cb602ea7785de21a187ef5ee5f7de4e3aa3f7e0e)
+- fix(arduino): fix messed up variable types [`e3659c4`](https://github.com/lvgl/lvgl/commit/e3659c46b128b2b715b196c3ccfb94b3de4c89f8)
+- fix:(BtnMatrix) Backport https://github.com/lvgl/lvgl/pull/4185 [`07bce74`](https://github.com/lvgl/lvgl/commit/07bce7466d471a15ba241a9db3239f7a116b0b46)
+- fix(chart): fix division by zero if there are no ticks [`67b3011`](https://github.com/lvgl/lvgl/commit/67b3011f835b08c77ff60ae2d1e6592a710ca2b1)
+- fix(msgbox): fix typo [`6a89bd2`](https://github.com/lvgl/lvgl/commit/6a89bd2d7409ac4d49ad32da73ba50a84f7c8990)
+- fix(tabview): remove the animation if the tab is selected by clicking the button on the header [`3de61c7`](https://github.com/lvgl/lvgl/commit/3de61c76af0aed1665e9d61e47b4dd50b9e8bdf1)
+- fix(btnmatrix): fix array out of bounds addressing with groups and no buttons [`edd5ad2`](https://github.com/lvgl/lvgl/commit/edd5ad28ad74d1025db0b442cfa390d8c01ae006)
+- fix(btnmatrix): fix using > 7 as button width [`75e6ef4`](https://github.com/lvgl/lvgl/commit/75e6ef4e1d66a85d68160b97ef931b0717e77212)
+- fix(draw): typo with LV_COLOR_DEPTH 8 [`45b13c3`](https://github.com/lvgl/lvgl/commit/45b13c378f6fc1728ddf1547c25daa61d62c9f76)
+- fix(disp): fix memory leak lv_scr_load_anim with auto_del and time=0 [`1caafc5`](https://github.com/lvgl/lvgl/commit/1caafc55dde46e1b7e3d17d8c5349fbf7cccba9f)
+
+- fix(msgbox): add missing lv_obj_class_init_obj [`6843c19`](https://github.com/lvgl/lvgl/commit/6843c191b792f66829477827279adbbc763541c1)
+- fix(flex): register LV_STYLE_FLEX_GROW [`5ba90a5`](https://github.com/lvgl/lvgl/commit/5ba90a5c41f584a8eb3a4fc8e2f466729652ddb3)
+
+### Examples
+
+- example(tabview): fix tabview disable scrollig example [`9491c3f`](https://github.com/lvgl/lvgl/commit/9491c3ff6d2f8e56b13d8fb493d4b3ee98ef1a4b)
+
+### Docs
+
+- docs: mention incompatibility between software rotation and `direct_mode` or `full_refresh` [`4308`](https://github.com/lvgl/lvgl/pull/4308)
+- docs(faq): don't say 24 bit is support as LVGL can't render in RGB888 directly [`227ac02`](https://github.com/lvgl/lvgl/commit/227ac023419eeb253892b1c36113059f12b1f9f2)
+
+### CI and tests
+
+### Others
+
+- chore(cmsis-pack): update cmsis-pack for v8.3.8 [`4340`](https://github.com/lvgl/lvgl/pull/4340)
+- add(docs): add renesas-ra6m3 get-started document [`4278`](https://github.com/lvgl/lvgl/pull/4278)
+- add(gpu): add renesas-ra6m3 gpu adaptation [`4270`](https://github.com/lvgl/lvgl/pull/4270)
+
+- Revert "fix:(BtnMatrix) Backport https://github.com/lvgl/lvgl/pull/4185" [`1713cd3`](https://github.com/lvgl/lvgl/commit/1713cd3fd8f93aa575fbcf0e34b8626b6ee69ded)
+
+
+
+
+## [v8.3.7](https://github.com/lvgl/lvgl/compare/v8.3.7...v8.3.6) 3 May 2023
+
+### New Features
+
+- feat(btnmatrix): review ctrl map and allow width values to be max 15 [`a150b15`](https://github.com/lvgl/lvgl/commit/a150b15e45a922eb5497fe5a31a480e1cd689246)
+
+### Fixes
+
+- fix (spinbox):  doubling characters entered from the keyboard [`4190`](https://github.com/lvgl/lvgl/pull/4190)
+- fix(arm-2d): fix transform-chrome-keying issue [`4178`](https://github.com/lvgl/lvgl/pull/4178)
+- fix(menu): prevent setting the current page again [`4136`](https://github.com/lvgl/lvgl/pull/4136)
+- fix(esp): fix ESP-IDF pedantic builds (backport v8.3) [`4135`](https://github.com/lvgl/lvgl/pull/4135)
+- fix: color mixing with LV_COLOR_SWAP == 1 [`4101`](https://github.com/lvgl/lvgl/pull/4101)
+
+- fix(indev): fix integer overflow in recursive zoom calculation [`a0795b4`](https://github.com/lvgl/lvgl/commit/a0795b49e82102ad68a27c86c36c37fffbe66d3c)
+- fix(style): fix trasition on bg_grad color [`48d7878`](https://github.com/lvgl/lvgl/commit/48d7878bac3f607322957ed6f710d6615d5e72e0)
+
+
+## [v8.3.6](https://github.com/lvgl/lvgl/compare/v8.3.6...v8.3.5) 3 April 2023
+
+### New Features
+
+- feat(msg): add lv_msg_unsubcribe_obj [`6af0179`](https://github.com/lvgl/lvgl/commit/6af01798d82f90f0c2ba6a9da39c4f10fb427df7)
+
+### Performance
+
+### Fixes
+
+- fix(group): fix default_group becomes wild pointer when deleted [`4076`](https://github.com/lvgl/lvgl/pull/4076)
+- fix(fs_posix): allow creating new file and set permission. [`3976`](https://github.com/lvgl/lvgl/pull/3976)
+- fix(img): support negative angles [`3846`](https://github.com/lvgl/lvgl/pull/3846)
+- fix(gif): synchronize with master [`4003`](https://github.com/lvgl/lvgl/pull/4003)
+- fix(gpu): fix STM GPU drivers for some variants [`4004`](https://github.com/lvgl/lvgl/pull/4004)
+- fix(img): possible divide by 0 exception (lvgl#3988) [`3990`](https://github.com/lvgl/lvgl/pull/3990)
+- fix(arc): fix knob area invalidation [`d0e19eb`](https://github.com/lvgl/lvgl/commit/d0e19eb2d38ba8a500399b0496d7a8363be4003e)
+- fix(slider): consider animations on pressing [`0b7777f`](https://github.com/lvgl/lvgl/commit/0b7777f27a7932efe3d594be426e1beb59d80ae3)
+- fix(bar): delete running animations when a new value is set without animation [`aa31380`](https://github.com/lvgl/lvgl/commit/aa313806d0ebde475fc2bc360a15172cc1b658a7)
+- docs: use a fixed commit of lv_web_emscripten [`501230e`](https://github.com/lvgl/lvgl/commit/501230e0fc95936199b3187d350873c3bb4a94e4)
+
+### Examples
+
+### Docs
+
+- docs(arduino): add note to not use lv_examles library [`2f294aa`](https://github.com/lvgl/lvgl/commit/2f294aa76c8fece98a4fa72304bc6f267ed2a228)
+- docs: use a fixed commit of lv_web_emscripten [`501230e`](https://github.com/lvgl/lvgl/commit/501230e0fc95936199b3187d350873c3bb4a94e4)
+
+### CI and tests
+
+### Others
+
+- chore(cmsis-pack): update cmsis-pack for v8.3.6 [`4108`](https://github.com/lvgl/lvgl/pull/4108)
+- chore: update the version numbers to v8.3.5-dev [`77670fb`](https://github.com/lvgl/lvgl/commit/77670fb1a55e0f2012ff7a057e535830e7253e22)
+- Update build_html_examples.sh [`399069b`](https://github.com/lvgl/lvgl/commit/399069b4a2423c11823581668fe71ce9a7c88e7d)
+
+
+## [v8.3.5](https://github.com/lvgl/lvgl/compare/v8.3.4...v8.3.5) 7 February 2023
+
+### Performance
+
+- perf(gpu): improve NXP's PXP and VGLite accelerators [`3952`](https://github.com/lvgl/lvgl/pull/3952)
+- perf(dam2d): rework stm32 dma2d  [`3904`](https://github.com/lvgl/lvgl/pull/3904)
+
+### Fixes
+
+- fix(monkey): remove executable permissions from source files [`3971`](https://github.com/lvgl/lvgl/pull/3971)
+- fix(ci): set Ubuntu version for MicroPython test [`3865`](https://github.com/lvgl/lvgl/pull/3865)
+- fix(Kconfig): fix wrong type of LV_FS_STDIO_CACHE_SIZE (v8.3) [`3906`](https://github.com/lvgl/lvgl/pull/3906)
+- docs(indev): fix the name of long_press_repeat_time (was long_press_rep_time) [`34c545e`](https://github.com/lvgl/lvgl/commit/34c545ef19dc97c8952a412e533a4cd3924b9fbc)
+- fix(roller): consider the recolor setting of the label [`39f4247`](https://github.com/lvgl/lvgl/commit/39f424767fa57376c4cb08cf22951fd56d854fd6)
+
+### Examples
+
+### Docs
+
+- docs(indev): fix the name of long_press_repeat_time (was long_press_rep_time) [`34c545e`](https://github.com/lvgl/lvgl/commit/34c545ef19dc97c8952a412e533a4cd3924b9fbc)
+
+### CI and tests
+
+- ci(esp): fix push to the component registry on tag [`e529230`](https://github.com/lvgl/lvgl/commit/e529230f4bb97b4506c430aac96d5ddaef685dc4)
+
+### Others
+
+- chore(cmsis-pack): update cmsis-pack for v8.3.5 [`3972`](https://github.com/lvgl/lvgl/pull/3972)
+- chore: add an option to "LV_TICK_CUSTOM" [`3879`](https://github.com/lvgl/lvgl/pull/3879)
+
+- bump version numbers to v8.3.5-dev [`47c8f8f`](https://github.com/lvgl/lvgl/commit/47c8f8f9822f4c0c0ffbe2f12b380bddefcec475)
+- Update layer.md [`9faca8a`](https://github.com/lvgl/lvgl/commit/9faca8a8d4125e21dedbf6e46aa1586a6b57e5b8)
+
+## [v8.3.4](https://github.com/lvgl/lvgl/compare/v8.3.4...v8.3.3) 15 December 2022
+
+### New Features
+
+- feat(keyboard): ported arabic keyboard from release 7.10.0 [`3728`](https://github.com/lvgl/lvgl/pull/3728)
+- feat(table): scroll to the selected cell with key navigation [`39d03a8`](https://github.com/lvgl/lvgl/commit/39d03a80f45847a1977cfe9cc6a509b1613d0aca)
+
+### Fixes
+
+- fix(rt-thread): sync rt-thread v5.0.0 rt_align [`3864`](https://github.com/lvgl/lvgl/pull/3864)
+- fix(draw): SDL2 gradient support  #3848 [`3856`](https://github.com/lvgl/lvgl/pull/3856)
+- fix(esp.cmake): add demos and examples [`3784`](https://github.com/lvgl/lvgl/pull/3784)
+- fix(indev): fix scrolling on transformed obejcts [`84cf05d`](https://github.com/lvgl/lvgl/commit/84cf05d8b23b31e000db757a278545e58fcbcbe8)
+- fix(style): add the missing support for pct pivot in tranasform style properties [`c8e584f`](https://github.com/lvgl/lvgl/commit/c8e584f879a1e1427e7a8f5ff496af39f17df41d)
+- fix(flex): be sure obj->w_layout and h_layout can't be set at the same time [`c4c4007`](https://github.com/lvgl/lvgl/commit/c4c400716e80a279e7b3d43b8992915fe94441eb)
+- fix(chart): fix very dense bar charts [`bb2c2ac`](https://github.com/lvgl/lvgl/commit/bb2c2ac34ac943978513c7ed51885078979b1c10)
+- fix(draw): handle LV_COLOR_DEPTH == 1 too in lv_draw_sw_transform [`bd11ad8`](https://github.com/lvgl/lvgl/commit/bd11ad8542eac9ff51420e5afb80f7e6fcf36a5c)
+- fix(example): fix warnings [`1e3ca25`](https://github.com/lvgl/lvgl/commit/1e3ca25fed13bbf85c32a60d4b7041cf8bd525ab)
+- fix(benchmark): fix warnings [`1ed026c`](https://github.com/lvgl/lvgl/commit/1ed026ca7307957568fe419f1ff39a15b2535b3e)
+- fix(draw): fix text color with sub pixel rendering and BGR order [`e050f5c`](https://github.com/lvgl/lvgl/commit/e050f5ca156f79d752894f38f0a437c946205cb4)
+- fix(meter): fix setting part_draw_dsc.id in needle img drawing [`716e5e2`](https://github.com/lvgl/lvgl/commit/716e5e2c8bd2a22e7d56e8d7ca33054a11a1f4ed)
+- fix(gridnav): fix stucking in pressed state with encoder [`ad56dfa`](https://github.com/lvgl/lvgl/commit/ad56dfaf7046a9bb8c05e877a8c8852cd14a59af)
+- fix(darw): add back the disappeared antialising=0 support [`2c17b28`](https://github.com/lvgl/lvgl/commit/2c17b28ac476c95a4153ab6cabb77b1c7208bb74)
+- fix(msg): fix typos in API by adding wrappers [`41fa416`](https://github.com/lvgl/lvgl/commit/41fa41613455260ccdeb87ecb890ce026ff0a435)
+- fix(draw): fix transformation accuracy [`e06f03d`](https://github.com/lvgl/lvgl/commit/e06f03db72f98439078118518158f52439dd7bf8)
+- fix(style): remove the reduntant define of LV_GRADIENT_MAX_STOPS [`903e94b`](https://github.com/lvgl/lvgl/commit/903e94b716ca1b32cdb51de11df679953699e53b)
+- demo(benchmark): fix lv_label_set_text_fmt format strings [`ae38258`](https://github.com/lvgl/lvgl/commit/ae3825871e31cd42cad2f310bdfc605150670511)
+- demo(benchmark): fix warning [`1173dcb`](https://github.com/lvgl/lvgl/commit/1173dcba96621e20c9a7240c8572bd6573bce6a0)
+
+## [v8.3.3](https://github.com/lvgl/lvgl/compare/v8.3.2...v8.3.3) 06 October 2022
+
+v8.3.3 is the same as v8.3.2. It was released only because the version number was set incorrectly in lvgl.h.
+
+## [v8.3.2](https://github.com/lvgl/lvgl/compare/v8.3.1...v8.3.2) 27 September 2022
+
+### Fixes
+
+- fix(fragment): fixed child fragment event dispatch [`3683`](https://github.com/lvgl/lvgl/pull/3683)
+- fix(sdl): clear streaming/target texture with FillRect [`3682`](https://github.com/lvgl/lvgl/pull/3682)
+- fix(sdl): transformation with alpha (#3576) [`3678`](https://github.com/lvgl/lvgl/pull/3678)
+- fix(draw_sw): fix image cache to access the freed stack space [`3584`](https://github.com/lvgl/lvgl/pull/3584)
+- fix(style): use compile time prop_cnt for const styles [`3609`](https://github.com/lvgl/lvgl/pull/3609)
+- fix(demo): can not found lvgl.h file [`3477`](https://github.com/lvgl/lvgl/pull/3477)
+- fix(ci) checkout lv_micropython release/v8 branch [`3524`](https://github.com/lvgl/lvgl/pull/3524)
+- fix(canvas): fix clipéping on transformation [`b884aba`](https://github.com/lvgl/lvgl/commit/b884abae26f3824b27783a85d18ed51e550347c1)
+- fix(draw): allow drawing outline with LV_DRAW_COMPLEX == 0 too [`ece3495`](https://github.com/lvgl/lvgl/commit/ece34950040e218fc73605a4e88f1060c2a274f8)
+- fix(colorwheel): fix updating color when using lv_colorwheel_set_hsv [`d59bba1`](https://github.com/lvgl/lvgl/commit/d59bba12db115afb4b6aa53eed2625221dfff2fd)
+- fix(slider): find the nearest value on click instead of floor [`dfd14fa`](https://github.com/lvgl/lvgl/commit/dfd14fa778aef25d0db61748a58aa9989ce5e2c8)
+- fix(draw): fix border drawing with thick borders [`d5b2a9b`](https://github.com/lvgl/lvgl/commit/d5b2a9b2562cbfa327bf0ec03c11d28576037a14)
+- fix(refr): fix true double double buffering logic with transparent screens [`8b605cc`](https://github.com/lvgl/lvgl/commit/8b605cc48224d0497cdd936fa77229e0c3d606d2)
+- fix(group): be sure obj is removed from its current group in lv_group_add_obj [`5156ee0`](https://github.com/lvgl/lvgl/commit/5156ee058d5de674a00ffd84d15d460de7f0e53b)
+- fix(style): add missing invalidation in lv_obj_remove_local_style_prop [`a0515ba`](https://github.com/lvgl/lvgl/commit/a0515ba30dd74b8b22a6709d334eb03782ee1a4d)
+
+### Docs
+
+- docs(draw) remove reference to old lv_fs_add_drv function [`3564`](https://github.com/lvgl/lvgl/pull/3564)
+- docs(disp): LV_COLOR_SCREEN_TRANSP remove dependency on LV_COLOR_DEPTH_32 as transparency is supported across all color depths [`3556`](https://github.com/lvgl/lvgl/pull/3556)
+
+### CI and tests
+
+- ci: protect test.c with #if LV_BUILD_TEST [`be485d7`](https://github.com/lvgl/lvgl/commit/be485d7605136d2a5d6a633c7cb5b7c525cae7ee)
+
+### Others
+
+- chore(rt-thread) backport fixes from v9 [`3604`](https://github.com/lvgl/lvgl/pull/3604)
+
+- chore: fix warnings [`7640950`](https://github.com/lvgl/lvgl/commit/76409502163ffe67cfbab9c7f24f2226cc8a5941)
+- remove accidentally added code [`5022476`](https://github.com/lvgl/lvgl/commit/5022476edc8676f2a6ef7b919d3578159edeef7c)
+
+
 ## [v8.3.1](https://github.com/lvgl/lvgl/compare/v8.3.0...v8.3.1) 25 July 2022
 
 ### Fixes

lib/lvgl/docs/get-started/platforms/arduino.md

@@ -52,9 +52,14 @@ In the INO file you can see how to register a display and a touchpad for LVGL an
 
 Note that, there is no dedicated INO file for every example. Instead, you can load an example by calling an `lv_example_...` function. For example `lv_example_btn_1()`.
 
-**IMPORTANT**
+**IMPORTANT NOTE 1**
 Due to some the limitations of Arduino's build system you need to copy `lvgl/examples` to `lvgl/src/examples`. Similarly for the demos `lvgl/demos` to `lvgl/src/demos`.
 
+
+**IMPORTANT NOTE 2**
+Note that the `lv_examples` library is for LVGL v7 and you shouldn't install it for this version (since LVGL v8)
+as the examples and demos are now part of the main LVGL library.
+
 ## Debugging and logging
 
 LVGL can display debug information in case of trouble.

lib/lvgl/docs/get-started/platforms/index.md

@@ -9,6 +9,7 @@
    nxp
    stm32
    espressif
+   renesas
    arduino
    tasmota-berry
    cmake

lib/lvgl/docs/get-started/platforms/nxp.md

@@ -1,6 +1,6 @@
 # NXP
-NXP has integrated LVGL into the MCUXpresso SDK packages for several of their general purpose and crossover
-microcontrollers, allowing easy evaluation and migration into your product design.
+NXP has integrated LVGL into the MCUXpresso SDK packages for general purpose and crossover microcontrollers, allowing
+easy evaluation and migration into your product design.
 [Download an SDK for a supported board](https://www.nxp.com/design/software/embedded-software/littlevgl-open-source-graphics-library:LITTLEVGL-OPEN-SOURCE-GRAPHICS-LIBRARY?&tid=vanLITTLEVGL-OPEN-SOURCE-GRAPHICS-LIBRARY)
 today and get started with your next GUI application.
 
@@ -10,42 +10,40 @@ with PXP/VGLite support if the modules are present), no additional integration w
 
 ## HW acceleration for NXP iMX RT platforms
 Depending on the RT platform used, the acceleration can be done by NXP PXP (PiXel Pipeline) and/or the Verisilicon GPU
-through an API named VGLite. There is a single NXP draw context that covers both GPUs allowing to have enabled either
-one or even both at the same time. While enableing both 2D accelerators, the VGLite can be used to accelerate widget
-drawing while the PXP accelerated blit and fill operations.
+through an API named VGLite. Each accelerator has its own context that allows them to be used individually as well
+simultaneously (in LVGL multithreading mode).
 
-Supported draw callbacks are available in "src/draw/nxp/lv_gpu_nxp.c":
+### PXP accelerator
+Several drawing features in LVGL can be offloaded to the PXP engine. The CPU is available for other operations while the
+PXP is running. RTOS is required to block the LVGL drawing thread and switch to another task or suspend the CPU for
+power savings.
+
+Supported draw callbacks are available in "src/draw/nxp/pxp/lv_draw_pxp.c":
 ```c
-    nxp_draw_ctx->base_draw.draw_arc = lv_draw_nxp_arc;
-    nxp_draw_ctx->base_draw.draw_rect = lv_draw_nxp_rect;
-    nxp_draw_ctx->base_draw.draw_img_decoded = lv_draw_nxp_img_decoded;
-    nxp_draw_ctx->blend = lv_draw_nxp_blend;
+    pxp_draw_ctx->base_draw.draw_img_decoded = lv_draw_pxp_img_decoded;
+    pxp_draw_ctx->blend = lv_draw_pxp_blend;
+    pxp_draw_ctx->base_draw.wait_for_finish = lv_draw_pxp_wait_for_finish;
+    pxp_draw_ctx->base_draw.buffer_copy = lv_draw_pxp_buffer_copy;
 ```
 
-If enabled both GPUs, the PXP is the preffered one to be used for drawing operation. A fallback mechanism is
-implemented so that if the feature is not supported by PXP (or if PXP fails), the VGLite will take over to handle the
-task. At the end, the CPU will assure that every widget drawing is fully covered (if not already done by GPU).
-
-### PXP accelerator
-Several drawing features in LVGL can be offloaded to the PXP engine. The VGLite (if supported) and CPU are available for
-other operations while the PXP is running. An RTOS is required to block the LVGL drawing thread and switch to another
-task or suspend the CPU for power savings.
-
 #### Features supported:
+    All operations can be used in conjunction with optional transparency.
+
   - RGB565 and ARGB8888 color formats
-  - Area fill + optional transparency
-  - BLIT (BLock Image Transfer) + optional transparency
-  - Color keying + optional transparency
-  - Recoloring (color tint) + optional transparency
-  - Image Rotation (90, 180, 270 degree) + optional transparency
-  - Recoloring (color tint) + Image Rotation (90, 180, 270 degree) + optional transparency
+  - Area fill with color
+  - BLIT (BLock Image Transfer)
   - Screen Rotation (90, 180, 270 degree)
+  - Color keying
+  - Recoloring (color tint)
+  - Image Rotation (90, 180, 270 degree)
+  - Buffer copy
   - RTOS integration layer
   - Default FreeRTOS and bare metal code provided
 
-  - Combination of recolor and/or rotation + color key/alpha blend/transparency is supported but PXP needs two steps.
-  First step is to recolor/rotate the image to a temporarly buffer (please check LV_MEM_SIZE value for allocation limit)
-  and another step is required to handle color keying, alpha chanel or to apply transparency.
+  - Combination of recolor and/or rotation + color key/alpha blend/transparency is supported.
+  That is achieved by PXP in two steps:
+    - First step is to recolor/rotate the image to a temporary buffer (statically allocated)
+    - Second step is required to handle color keying, alpha channel or to apply transparency
 
 #### Known limitations:
   - Rotation is not supported for images unaligned to blocks of 16x16 pixels.
@@ -78,51 +76,71 @@ and the final output image can look shifted.
 
 #### Project setup:
   - Add PXP related files to project:
-    - src/draw/nxp/pxp/lv_gpu_nxp_pxp.c, src/draw/nxp/pxp/lv_gpu_nxp_pxp.h: init, uninit, run/wait PXP device, log/trace
-    - src/draw/nxp/pxp/lv_draw_pxp_blend.c, src/draw/nxp/pxp/lv_draw_pxp_blend.h: fill and blit (w/o transformation)
-    - src/draw/nxp/pxp/lv_gpu_nxp_osa.c, src/draw/nxp/pxp/lv_gpu_osa.h: default implementation of OS-specific functions
-    (bare metal and FreeRTOS only)
+    - src/draw/nxp/pxp/lv_draw_pxp.c[.h]: draw context callbacks
+    - src/draw/nxp/pxp/lv_draw_pxp_blend.c[.h]: fill and blit (with optional transformation)
+    - src/draw/nxp/pxp/lv_gpu_nxp_pxp.c[.h]: init, uninit, run/wait PXP device
+    - src/draw/nxp/pxp/lv_gpu_nxp_pxp_osa.c[.h]: OS abstraction (FreeRTOS or bare metal)
         - optional, required only if `LV_USE_GPU_NXP_PXP_AUTO_INIT` is set to 1
   - PXP related code depends on two drivers provided by MCU SDK. These drivers need to be added to project:
-      - fsl_pxp.c, fsl_pxp.h: PXP driver
-      - fsl_cache.c, fsl_cache.h: CPU cache handling functions
+      - fsl_pxp.c[.h]: PXP driver
+      - fsl_cache.c[.h]: CPU cache handling functions
 
 #### Logging:
-  - By default, LV_GPU_NXP_PXP_LOG_ERRORS is enabled so that any PXP error will be seen on LVGL output
-  - For tracing logs about the PXP limitations or size thresholds, the user can enable LV_GPU_NXP_PXP_LOG_TRACES
+  - By default, `LV_GPU_NXP_PXP_LOG_ERRORS` is enabled so that any PXP error will be seen on SDK debug console
+  - By default, `LV_GPU_NXP_PXP_LOG_TRACES` is disabled. Enable it for tracing logs (like PXP limitations)
 
 #### Advanced configuration:
   - Implementation depends on multiple OS-specific functions. The struct `lv_nxp_pxp_cfg_t` with callback pointers is
-  used as a parameter for the `lv_gpu_nxp_pxp_init()` function. Default implementation for FreeRTOS and baremetal is
-  provided in lv_gpu_nxp_osa.c
+  used as a parameter for the `lv_gpu_nxp_pxp_init()` function. Default implementation for FreeRTOS and bare metal is
+  provided in lv_gpu_nxp_pxp_osa.c
       - `pxp_interrupt_init()`: Initialize PXP interrupt (HW setup, OS setup)
       - `pxp_interrupt_deinit()`: Deinitialize PXP interrupt (HW setup, OS setup)
       - `pxp_run()`: Start PXP job. Use OS-specific mechanism to block drawing thread. PXP must finish drawing before
       leaving this function.
-  - There are configurable area thresholds which are used to decide whether the area will be processed by CPU or by PXP.
-  Areas smaller than a defined value will be processed by CPU and those bigger than the threshold will be processed by
-  PXP. These thresholds may be defined as preprocessor variables. Default values are defined in lv_draw_pxp_blend.h
-      - `LV_GPU_NXP_PXP_BLIT_SIZE_LIMIT`: size threshold for image BLIT, BLIT with color keying, BLIT with recolor and
-      BLIT with rotation (OPA >= LV_OPA_MAX)
-      - `LV_GPU_NXP_PXP_BLIT_OPA_SIZE_LIMIT`: size threshold for image BLIT, BLIT with color keying, BLIT with recolor
-      and BLIT with rotation and transparency (OPA < LV_OPA_MAX)
-      - `LV_GPU_NXP_PXP_FILL_SIZE_LIMIT`: size threshold for fill operation (OPA >= LV_OPA_MAX)
-      - `LV_GPU_NXP_PXP_FILL_OPA_SIZE_LIMIT`: size threshold for fill operation with transparency (OPA < LV_OPA_MAX)
+  - Area threshold (size limit) is configurable and used to decide whether the area will be processed by PXP or not.
+  Areas smaller than the defined value will be processed by CPU and those bigger than the threshold will be processed by
+  PXP. The threshold is defined as a macro in lv_draw_pxp.c
+      - `LV_GPU_NXP_PXP_SIZE_LIMIT`: size threshold for fill/blit (with optional transformation)
 
 ### VGLite accelerator
-Extra drawing features in LVGL can be handled by the VGLite engine. The PXP (if supported) and CPU are available for
-other operations while the VGLite is running. An RTOS is required to block the LVGL drawing thread and switch to another
-task or suspend the CPU for power savings.
+Extra drawing features in LVGL can be handled by the VGLite engine. The CPU is available for other operations while the
+VGLite is running. An RTOS is required to block the LVGL drawing thread and switch to another task or suspend the CPU
+for power savings.
+
+Supported draw callbacks are available in "src/draw/nxp/vglite/lv_draw_vglite.c":
+```c
+    vglite_draw_ctx->base_draw.init_buf = lv_draw_vglite_init_buf;
+    vglite_draw_ctx->base_draw.draw_line = lv_draw_vglite_line;
+    vglite_draw_ctx->base_draw.draw_arc = lv_draw_vglite_arc;
+    vglite_draw_ctx->base_draw.draw_rect = lv_draw_vglite_rect;
+    vglite_draw_ctx->base_draw.draw_img_decoded = lv_draw_vglite_img_decoded;
+    vglite_draw_ctx->blend = lv_draw_vglite_blend;
+    vglite_draw_ctx->base_draw.wait_for_finish = lv_draw_vglite_wait_for_finish;
+    vglite_draw_ctx->base_draw.buffer_copy = lv_draw_vglite_buffer_copy;
+```
 
 #### Features supported:
+    All operations can be used in conjunction with optional transparency.
+
   - RGB565 and ARGB8888 color formats
-  - Area fill + optional transparency
-  - BLIT (BLock Image Transfer) + optional transparency
-  - Image Rotation (any degree with decimal) + optional transparency
-  - Image Scale + optional transparency
-  - Draw background rectangle with radius or gradient
-  - Draw arc
-  - RTOS integration layer
+  - Area fill with color
+  - BLIT (BLock Image Transfer)
+  - Image Rotation (any degree with decimal)
+  - Image Scale
+  - Draw rectangle background with optional radius or gradient
+  - Blit rectangle background image
+  - Draw rectangle border/outline with optional rounded corners
+  - Draw arc with optional rounded ending
+  - Draw line or dashed line with optional rounded ending
+  - Buffer copy
+
+#### Known limitations:
+  - Source image alignment:
+  The byte alignment requirement for a pixel depends on the specific pixel format. Both buffer address and buffer stride
+  must be aligned. As general rule, the alignment is set to 16 pixels. This makes the buffer address alignment to be
+  32 bytes for RGB565 and 64 bytes for ARGB8888.
+  - For pixel engine (PE) destination, the alignment should be 64 bytes for all tiled (4x4) buffer layouts.
+  The pixel engine has no additional alignment requirement for linear buffer layouts (`VG_LITE_LINEAR`).
 
 #### Basic configuration:
   - Select NXP VGLite engine in lv_conf.h: Set `LV_USE_GPU_NXP_VG_LITE` to 1
@@ -130,8 +148,8 @@ task or suspend the CPU for power savings.
 
 #### Basic initialization:
   - Initialize VGLite before calling `lv_init()` by specifying the width/height of tessellation window. Value should be
-  a multiple of 16; minimum value is 16 pixels, maximum cannot be greater than frame width. If less than or equal to 0,
-  then no tessellation buffer is created, in which case the function is used for a blit init.
+  a multiple of 16; minimum value is 16 pixels, maximum cannot be greater than the frame width. If less than or equal
+  to 0, then no tessellation buffer is created, in which case VGLite is initialized only for blitting.
 ```c
       #if LV_USE_GPU_NXP_VG_LITE
         #include "vg_lite.h"
@@ -144,25 +162,21 @@ task or suspend the CPU for power savings.
 
 #### Project setup:
   - Add VGLite related files to project:
-    - src/draw/nxp/vglite/lv_gpu_nxp_vglite.c, src/draw/nxp/vglite/lv_gpu_nxp_vglite.h: buffer init, log/trace
-    - src/draw/nxp/vglite/lv_draw_vglite_blend.c, src/draw/nxp/vglite/lv_draw_vglite_blend.h: fill and blit
-    (w/o transformation)
-    - src/draw/nxp/vglite/lv_draw_vglite_rect.c, src/draw/nxp/vglite/lv_draw_vglite_rect.h: rectangle draw
-    - src/draw/nxp/vglite/lv_draw_vglite_arc.c, src/draw/nxp/vglite/lv_draw_vglite_arc.h: arc draw
+    - src/draw/nxp/vglite/lv_draw_vglite.c[.h]: draw context callbacks
+    - src/draw/nxp/vglite/lv_draw_vglite_blend.c[.h]: fill and blit (with optional transformation)
+    - src/draw/nxp/vglite/lv_draw_vglite_rect.c[.h]: draw rectangle
+    - src/draw/nxp/vglite/lv_draw_vglite_arc.c[.h]: draw arc
+    - src/draw/nxp/vglite/lv_draw_vglite_line.c[.h]: draw line
+    - src/draw/nxp/vglite/lv_vglite_buf.c[.h]: init/get vglite buffer
+    - src/draw/nxp/vglite/lv_vglite_utils.c[.h]: function helpers
 
 #### Logging:
-  - By default, LV_GPU_NXP_VG_LITE_LOG_ERRORS is enabled so that any VGLite error will be seen on LVGL output
-  - For tracing logs about the VGLite limitations, size thresholds or stride alignment, the user can enable
-  LV_GPU_NXP_VG_LITE_LOG_TRACES
+  - By default, `LV_GPU_NXP_VG_LITE_LOG_ERRORS` is enabled so that any VGLite error will be seen on SDK debug console
+  - By default, `LV_GPU_NXP_VG_LITE_LOG_TRACES` is disabled. Enable it for tracing logs (like blit split workaround or
+  VGLite fallback to CPU due to any error on the driver)
 
 #### Advanced configuration:
-  - There are configurable area thresholds which are used to decide whether the area will be processed by CPU or by
-  VGLite. Areas smaller than a defined value will be processed by CPU and those bigger than the threshold will be
-  processed by VGLite. These thresholds may be defined as preprocessor variables. Default values are defined in
-  lv_draw_vglite_blend.h
-      - `LV_GPU_NXP_VG_LITE_BLIT_SIZE_LIMIT`: size threshold for image BLIT, BLIT with scale and BLIT with rotation
-      (OPA >= LV_OPA_MAX)
-      - `LV_GPU_NXP_VG_LITE_BLIT_OPA_SIZE_LIMIT`: size threshold for image BLIT, BLIT with scale and BLIT with rotation
-      and transparency (OPA < LV_OPA_MAX)
-      - `LV_GPU_NXP_VG_LITE_FILL_SIZE_LIMIT`: size threshold for fill operation (OPA >= LV_OPA_MAX)
-      - `LV_GPU_NXP_VG_LITE_FILL_OPA_SIZE_LIMIT`: size threshold for fill operation with transparency (OPA < LV_OPA_MAX)
+  - Area threshold (size limit) is configurable and used to decide whether the area will be processed by VGLite or not.
+  Areas smaller than the defined value will be processed by CPU and those bigger than the threshold will be processed by
+  VGLite. The threshold is defined as a macro in lv_draw_vglite.c
+      - `LV_GPU_NXP_VG_LITE_SIZE_LIMIT`: size threshold for fill/blit (with optional transformation)

lib/lvgl/docs/get-started/platforms/pc-simulator.md

@@ -15,7 +15,7 @@ The simulator is ported to various IDEs (Integrated Development Environments). C
 
 - [Eclipse with SDL driver](https://github.com/lvgl/lv_sim_eclipse_sdl): Recommended on Linux and Mac
 - [CodeBlocks](https://github.com/lvgl/lv_sim_codeblocks_win): Recommended on Windows
-- [VisualStudio with SDL driver](https://github.com/lvgl/lv_sim_visual_studio_sdl): For Windows
+- [VisualStudio](https://github.com/lvgl/lv_sim_visual_studio_sdl): For Windows
 - [VSCode with SDL driver](https://github.com/lvgl/lv_sim_vscode_sdl): Recommended on Linux and Mac
 - [PlatformIO with SDL driver](https://github.com/lvgl/lv_platformio): Recommended on Linux and Mac
 - [MDK with FastModel](https://github.com/lvgl/lv_port_an547_cm55_sim): For Windows

lib/lvgl/docs/get-started/platforms/renesas.md

@@ -0,0 +1,129 @@
+# Renesas
+The [HMI-Board](https://bit.ly/3I9nfUo) development board SDK now comes with LVGL integration for quick evaluation. Simply download the [SDK](https://github.com/RT-Thread-Studio/sdk-bsp-ra6m3-hmi-board/tree/main/projects/hmi-board-lvgl) for the supported motherboard and you’ll be on your way to creating your next GUI application in no time. For more information, check out the [Software design description](https://github.com/RT-Thread-Studio/sdk-bsp-ra6m3-hmi-board/blob/main/projects/hmi-board-lvgl/README.md).
+
+## Creating new project with LVGL
+It is recommended to start your project by downloading the HMI-Board SDK example project. It comes fully equipped with LVGL and dave-2d support (if the modules are present), so you won’t need to do any additional integration work.
+
+## HW acceleration for Renesas RA6M3 platforms
+For RA6M3 platforms, hardware acceleration can be achieved using the dave-2d GPU, depending on the platform used. Each accelerator has its own context, allowing them to be used individually or simultaneously in LVGL’s multithreading mode.
+
+### Dave-2d accelerator
+LVGL can offload several drawing features to the dave-2d engine, freeing up the CPU for other operations while dave-2d runs. An RTOS is required to block the LVGL drawing thread and switch to another task or suspend the CPU for power savings. Supported draw callbacks can be found in “src/draw/renesas/lv_gpu_d2_ra6m3.c”.
+
+LVGL can offload several drawing features to the dave-2d engine, freeing up the CPU for other operations while dave-2d runs. An RTOS is required to block the LVGL drawing thread and switch to another task or suspend the CPU for power savings. Supported draw callbacks can be found in “src/draw/renesas/lv_gpu_d2_ra6m3.c”.
+
+```c
+	ra_2d_draw_ctx->blend = lv_draw_ra6m3_2d_blend;
+    ra_2d_draw_ctx->base_draw.draw_img_decoded = lv_port_gpu_img_decoded;
+    ra_2d_draw_ctx->base_draw.wait_for_finish = lv_port_gpu_wait;
+    ra_2d_draw_ctx->base_draw.draw_letter = lv_draw_gpu_letter;
+```
+
+### Features supported:
+    All operations can be used in conjunction with optional transparency.
+
+  - RGB565 and ARGB8888 color formats
+  - Area fill with color
+  - BLIT (BLock Image Transfer)
+  - Color conversion
+  - Rotate and scale
+  - Alpha blending
+  - Bilinear filtering
+  - RTOS integration layer
+  - Default RT-Thread code provided
+  - Subpixel exact placement
+
+### Basic configuration:
+  - Select Renesas dave-2d engine in lv_conf.h: Set `LV_USE_GPU_RA6M3_G2D` to 1
+  - Set referenced header file in lv_conf.h: `#define LV_GPU_RA6M3_G2D_INCLUDE "hal_data.h"`
+
+### RT-Thread Example:
+
+```c
+#define COLOR_BUFFER  (LV_HOR_RES_MAX * LV_VER_RES_MAX)
+
+static lv_disp_drv_t disp_drv;
+
+/*A static or global variable to store the buffers*/
+static lv_color_t buf_1[COLOR_BUFFER];
+```
+
+- After initializing your peripherals (such as SPI, GPIOs, and LCD) in the `lv_port_disp_init()` function, you can initialize LVGL using [`lv_init()`.](https://docs.lvgl.io/master/API/core/lv_obj.html#_CPPv47lv_initv) Next, register the frame buffers using `lv_disp_draw_buf_init()` and create a new display driver using `lv_disp_drv_init()`.
+
+```c
+/*Initialize `disp_buf` with the buffer(s). With only one buffer use NULL instead buf_2 */
+lv_disp_draw_buf_init(&disp_buf, buf_1, RT_NULL, COLOR_BUFFER);
+lv_disp_drv_init(&disp_drv); /*Basic initialization*/
+
+/*Set the resolution of the display*/
+disp_drv.hor_res = LV_HOR_RES_MAX;
+disp_drv.ver_res = LV_VER_RES_MAX;
+
+/*Set a display buffer*/
+disp_drv.draw_buf = &disp_buf;
+
+/*Used to copy the buffer's content to the display*/
+disp_drv.flush_cb = disp_flush;
+
+/* Initialize GPU module */
+lv_port_gpu_hw_init();
+
+/*Finally register the driver*/
+lv_disp_drv_register(&disp_drv);
+```
+
+* To run LVGL, you’ll need to create a thread. You can find examples of how to do this using RT-Thread in the `env_support/rt-thread/lv_rt_thread_port.c` file.
+
+```c
+static void lvgl_thread_entry(void *parameter)
+{
+#if LV_USE_LOG
+    lv_log_register_print_cb(lv_rt_log);
+#endif /* LV_USE_LOG */
+    lv_init();
+    lv_port_disp_init();
+    lv_port_indev_init();
+    lv_user_gui_init();
+
+    /* handle the tasks of LVGL */
+    while(1)
+    {
+        lv_task_handler();
+        rt_thread_mdelay(LV_DISP_DEF_REFR_PERIOD);
+    }
+}
+
+static int lvgl_thread_init(void)
+{
+    rt_err_t err;
+	
+    /* create lvgl thread */
+    err = rt_thread_init(&lvgl_thread, "LVGL", lvgl_thread_entry, RT_NULL,
+           &lvgl_thread_stack[0], sizeof(lvgl_thread_stack), PKG_LVGL_THREAD_PRIO, 10);
+    if(err != RT_EOK)
+    {
+        LOG_E("Failed to create LVGL thread");
+        return -1;
+    }
+    rt_thread_startup(&lvgl_thread);
+
+    return 0;
+}
+INIT_ENV_EXPORT(lvgl_thread_init);
+```
+
+- The last step is to create a function to output the frame buffer to your LCD. The specifics of this function will depend on the features of your MCU. Here’s an example for a typical MCU interface: `my_flush_cb`.
+
+```c
+static void my_flush_cb(lv_disp_drv_t *disp_drv, const lv_area_t *area, lv_color_t *color_p)
+{
+#ifdef PKG_USING_ILI9341
+    lcd_fill_array_spi(area->x1, area->y1, area->x2, area->y2, color_p);
+#elif LV_USE_GPU_RA6M3_G2D
+    lv_port_gpu_blit(area->x1, area->y1, color_p, area);
+#else
+    ......
+#endif
+    lv_disp_flush_ready(disp_drv);
+}
+```

lib/lvgl/docs/intro/index.md

@@ -132,7 +132,7 @@ LVGL needs just one simple driver function to copy an array of pixels into a giv
 If you can do this with your display then you can use it with LVGL.
 
 Some examples of the supported display types:
-- TFTs with 16 or 24 bit color depth
+- TFTs with 16 or 32 bit color depth
 - Monitors with an HDMI port
 - Small monochrome displays
 - Gray-scale displays

lib/lvgl/docs/libs/fsdrv.md

@@ -2,14 +2,38 @@
 # File System Interfaces
 
 LVGL has a [File system](https://docs.lvgl.io/master/overview/file-system.html) module to provide an abstraction layer for various file system drivers.
+You still need to provide the drivers and libraries, this extension provides only the bridge between FATFS, LittleFS, STDIO, POSIX, WIN32 and LVGL.
 
-LVG has built in support for:
-- [FATFS](http://elm-chan.org/fsw/ff/00index_e.html)
-- STDIO (Linux and Windows using C standard function .e.g fopen, fread)
-- POSIX (Linux and Windows using POSIX function .e.g open, read)
-- WIN32 (Windows using Win32 API function .e.g CreateFileA, ReadFile)
+## Built in wrappers
 
-You still need to provide the drivers and libraries, this extension provides only the bridge between FATFS, STDIO, POSIX, WIN32 and LVGL.
+### FATFS
+
+Bridge for [FatFS](http://elm-chan.org/fsw/ff/00index_e.html). FatFS itself is not part of LVGL, but can be added and initialized externally.
+
+
+### LittleFS
+
+Though `lv_fs_littlefs` uses [LittleFS]((https://github.com/littlefs-project/littlefs)) API, the LittleFS library needs other external libraries that handle the mounting of partitions and low-level accesses, according to the given architecture. The functions for the latter are given to the lfs_t structure as pointers by an external low-level library.
+
+There's a convenience function called `lv_fs_littlefs_set_driver(LV_FS_LITTLEFS_LETTER, my_lfs)`, specific to `lv_fs_littlefs`, to attach a `lfs_t` object's pointer to a registered driver-letter. See its comments for more info.
+
+
+[esp_littlefs](https://components.espressif.com/components/joltwallet/littlefs) is a wrapper for LittleFS to be used in Espressif ESP-devices. It handles the mounting and has the low-level `littlefs_api` functions to read/write/erase blocks that LittleFS library needs. On mounting by `esp_littlefs` the `lfs_t` structures are created. You need to get a handle to these to use ESP with `lv_fs_littlefs`, as all functions use that `lfs_t` in LittleFS to identify the mounted partition. 
+
+
+In case you don't find a special function in the `lv_fs_littlefs` wrapper, you can look for it in the `esp_littlefs` API and use it directly, as `lv_fs_littlefs` and the `esp_littlefs` APIs can be used side-by-side. 
+
+### STDIO
+
+Bride to C standard functions on Linux and Windows. For example `fopen`, `fread`, etc.
+
+### POSIX 
+
+Bride to POSIX functions on Linux and Windows. For example `open`, `read`, etc.
+
+### WIN32 
+
+Bride to Win32 API function. For example `CreateFileA`, `ReadFile`, etc.
 
 ## Usage
 

lib/lvgl/docs/libs/index.md

@@ -12,6 +12,7 @@
    png
    gif
    freetype
+   tiny_ttf
    qrcode
    rlottie
    ffmpeg

lib/lvgl/docs/libs/tiny_ttf.md

@@ -0,0 +1,35 @@
+# Tiny TTF font engine
+
+## Usage
+
+Use https://github.com/nothings/stb to render TrueType fonts in LVGL.
+
+When enabled in `lv_conf.h` with `LV_USE_TINY_TTF`
+`lv_tiny_ttf_create_data(data, data_size, font_size)` can be used to
+create a TTF font instance at the specified font size. You can then
+use that font anywhere `lv_font_t` is accepted.
+
+By default, the TTF or OTF file must be embedded as an array, either in
+a header, or loaded into RAM in order to function.
+
+However, if `LV_TINY_TTF_FILE_SUPPORT` is enabled,
+`lv_tiny_ttf_create_file(path, font_size)` will also be available,
+allowing tiny_ttf to stream from a file. The file must remain open the
+entire time the font is being used, and streaming on demand may be
+considerably slower.
+
+After a font is created, you can change the font size in pixels by using
+`lv_tiny_ttf_set_size(font, font_size)`.
+
+By default, a font will use up to 4KB of cache to speed up rendering
+glyphs. This maximum can be changed by using
+`lv_tiny_ttf_create_data_ex(data, data_size, font_size, cache_size)`
+or `lv_tiny_ttf_create_file_ex(path, font_size, cache_size)` (when
+available). The cache size is indicated in bytes.
+
+## API
+
+```eval_rst
+.. doxygenfile:: lv_tiny_ttf.h
+  :project: lvgl
+```

lib/lvgl/docs/overview/display.md

@@ -63,12 +63,11 @@ See the [Display background](#display-background) section for more details. If t
 This configuration (transparent screen and display) could be used to create for example OSD menus where a video is played on a lower layer, and a menu is overlayed on an upper layer.
 
 To handle transparent displays, special (slower) color mixing algorithms need to be used by LVGL so this feature needs to enabled with `LV_COLOR_SCREEN_TRANSP` in `lv_conf.h`.
-As this mode operates on the Alpha channel of the pixels `LV_COLOR_DEPTH = 32` is also required. The Alpha channel of 32-bit colors will be 0 where there are no objects and 255 where there are solid objects.
+The Alpha channel of 32-bit colors will be 0 where there are no objects and 255 where there are solid objects.
 
 In summary, to enable transparent screens and displays for OSD menu-like UIs:
 - Enable `LV_COLOR_SCREEN_TRANSP` in `lv_conf.h`
-- Be sure to use `LV_COLOR_DEPTH 32`
-- Set the screen's opacity to `LV_OPA_TRANSP` e.g. with `lv_obj_set_style_local_bg_opa(lv_scr_act(), LV_OBJMASK_PART_MAIN, LV_STATE_DEFAULT, LV_OPA_TRANSP)`
+- Set the screen's opacity to `LV_OPA_TRANSP` e.g. with `lv_obj_set_style_bg_opa(lv_scr_act(), LV_OPA_TRANSP, LV_PART_MAIN)`
 - Set the display opacity to `LV_OPA_TRANSP` with `lv_disp_set_bg_opa(NULL, LV_OPA_TRANSP);`
 
 ## Features of displays

lib/lvgl/docs/overview/layer.md

@@ -34,11 +34,11 @@ lv_label_set_text(label2, "Button 2");            	/*Set the text of the label*/
 lv_obj_del(label2);
 ```
 
-## Bring to the foreground
+## Change order
 
 There are four explicit ways to bring an object to the foreground:
 - Use `lv_obj_move_foreground(obj)` to bring an object to the foreground. Similarly, use `lv_obj_move_background(obj)` to move it to the background.
-- Use `lv_obj_move_up(obj)` to move an object one position up in the hierarchy, Similarly, use `lv_obj_move_down(obj)` to move an object one position down in the hierarchy.
+- Use `lv_obj_move_to_index(obj, idx)` to move an object to a given index in the order of children. (0: backgroud, child_num - 1: foreground, <0: count from the top, to move forward (up): `lv_obj_move_to_index(obj, lv_obj_get_index(obj) - 1)`)
 - Use `lv_obj_swap(obj1, obj2)` to swap the relative layer position of two objects.
 - When `lv_obj_set_parent(obj, new_parent)` is used, `obj` will be on the foreground of the `new_parent`.
 

lib/lvgl/docs/overview/object.md

@@ -173,7 +173,7 @@ All inputs are disabled during the screen animation.
 Screens are created on the currently selected *default display*.
 The *default display* is the last registered display with `lv_disp_drv_register`. You can also explicitly select a new default display using `lv_disp_set_default(disp)`.
 
-`lv_scr_act()`, `lv_scr_load()` and `lv_scr_load_anim()` operate on the default screen.
+`lv_scr_act()`, `lv_scr_load()` and `lv_scr_load_anim()` operate on the default display.
 
 Visit [Multi-display support](/overview/display) to learn more.
 

lib/lvgl/docs/overview/renderers/arm-2d.md

@@ -1,4 +1,32 @@
-# ARM-2D GPU
+# Arm-2D GPU
 
-TODO
+Arm-2D is not a GPU but **an abstraction layer for 2D GPUs dedicated to Microcontrollers**. It supports all Cortex-M processors ranging from Cortex-M0 to the latest Cortex-M85. 
 
+Arm-2D is an open-source project on Github. For more, please refer to: https://github.com/ARM-software/Arm-2D.
+
+
+
+## How to Use
+
+In general, you can set the macro `LV_USE_GPU_ARM2D` to `1`in `lv_conf.h` to enable Arm-2D acceleration for LVGL.
+
+If you are using **[CMSIS-Pack](https://github.com/lvgl/lvgl/tree/master/env_support/cmsis-pack)** to deploy the LVGL. You don't have to define the macro `LV_USE_GPU_ARM2D` manually, instead, please select the component `GPU Arm-2D` in the **RTE** dialog. This step will define the macro for us. 
+
+
+
+## Design Considerations
+
+As mentioned before, Arm-2D is an abstraction layer for 2D GPU; hence if there is no accelerator or dedicated instruction set (such as Helium or ACI) available for Arm-2D, it provides negligible performance boost for LVGL (sometimes worse) for regular Cortex-M processors. 
+
+**We highly recommend you enable Arm-2D acceleration for LVGL** when:
+
+- The target processors are **Cortex-M55** and/or **Cortex-M85**
+- The target processors support **[Helium](https://developer.arm.com/documentation/102102/0103/?lang=en)**.
+- The device vendor provides an arm-2d compliant driver for their propriotory 2D accelerators and/or customized instruction set.
+- The target device contains [DMA-350](https://community.arm.com/arm-community-blogs/b/internet-of-things-blog/posts/arm-corelink-dma-350-next-generation-direct-memory-access-for-endpoint-ai)
+
+
+
+## Examples
+
+- [A Cortex-M55 (supports Helium) based MDK Project, PC emulation is available.](https://github.com/lvgl/lv_port_an547_cm55_sim)

lib/lvgl/docs/overview/style-props.md

@@ -355,7 +355,7 @@ Set the opacity of the border. Value 0, `LV_OPA_0` or `LV_OPA_TRANSP` means full
 </ul>
 
 ### border_width
-Set hte width of the border. Only pixel values can be used.
+Set the width of the border. Only pixel values can be used.
 <ul>
 <li style='display:inline; margin-right: 20px; margin-left: 0px'><strong>Default</strong> 0</li>
 <li style='display:inline; margin-right: 20px; margin-left: 0px'><strong>Inherited</strong> No</li>
@@ -708,6 +708,15 @@ Scale down all opacity values of the object by this factor. Value 0, `LV_OPA_0`
 <li style='display:inline; margin-right: 20px; margin-left: 0px'><strong>Ext. draw</strong> No</li>
 </ul>
 
+### opa_layered
+First draw the object on the layer, then scale down layer opacity factor. Value 0, `LV_OPA_0` or `LV_OPA_TRANSP` means fully transparent, 255, `LV_OPA_100` or `LV_OPA_COVER` means fully covering, other values or LV_OPA_10, LV_OPA_20, etc means semi transparency.
+<ul>
+<li style='display:inline; margin-right: 20px; margin-left: 0px'><strong>Default</strong> `LV_OPA_COVER`</li>
+<li style='display:inline; margin-right: 20px; margin-left: 0px'><strong>Inherited</strong> Yes</li>
+<li style='display:inline; margin-right: 20px; margin-left: 0px'><strong>Layout</strong> No</li>
+<li style='display:inline; margin-right: 20px; margin-left: 0px'><strong>Ext. draw</strong> No</li>
+</ul>
+
 ### color_filter_dsc
 Mix a color to all colors of the object.
 <ul>
@@ -772,7 +781,7 @@ Describes how to blend the colors to the background. The possible values are `LV
 </ul>
 
 ### layout
-Set the layout if the object. The children will be repositioned and resized according to the policies set for the layout. For the possible values see the documentation of the layouts.
+Set the layout of the object. The children will be repositioned and resized according to the policies set for the layout. For the possible values see the documentation of the layouts.
 <ul>
 <li style='display:inline; margin-right: 20px; margin-left: 0px'><strong>Default</strong> 0</li>
 <li style='display:inline; margin-right: 20px; margin-left: 0px'><strong>Inherited</strong> No</li>

lib/lvgl/docs/porting/display.md

@@ -204,6 +204,10 @@ The default rotation of your display when it is initialized can be set using the
 
 Display rotation can also be changed at runtime using the `lv_disp_set_rotation(disp, rot)` API.
 
+If you enable rotation the coordinates of the pointer input devices (e.g. touchpad) will be rotated too.
+
+Note that when using software rotation, you cannot use neither `direct_mode` nor `full_refresh` in the driver. When using either of these, you will have to rotate the pixels yourself e.g. in the `flush_cb`.
+
 Support for software rotation is a new feature, so there may be some glitches/bugs depending on your configuration. If you encounter a problem please open an issue on [GitHub](https://github.com/lvgl/lvgl/issues).
 
 ### Decoupling the display refresh timer

lib/lvgl/docs/porting/indev.md

@@ -114,7 +114,7 @@ You need to have 3 buttons available:
 - `LV_KEY_RIGHT` will simulate turning encoder right
 - other keys will be passed to the focused widget
 
-If you hold the keys it will simulate an encoder advance with period specified in `indev_drv.long_press_rep_time`.
+If you hold the keys it will simulate an encoder advance with period specified in `indev_drv.long_press_repeat_time`.
 
 ```c
 indev_drv.type = LV_INDEV_TYPE_ENCODER;
@@ -172,7 +172,7 @@ The default value of the following parameters can be changed in `lv_indev_drv_t`
 - `scroll_limit` Number of pixels to slide before actually scrolling the object.
 - `scroll_throw`  Scroll throw (momentum) slow-down in [%]. Greater value means faster slow-down.
 - `long_press_time` Press time to send `LV_EVENT_LONG_PRESSED` (in milliseconds)
-- `long_press_rep_time` Interval of sending `LV_EVENT_LONG_PRESSED_REPEAT` (in milliseconds)
+- `long_press_repeat_time` Interval of sending `LV_EVENT_LONG_PRESSED_REPEAT` (in milliseconds)
 - `read_timer` pointer to the `lv_timer` which reads the input device. Its parameters can be changed by `lv_timer_...()` functions. `LV_INDEV_DEF_READ_PERIOD` in `lv_conf.h` sets the default read period.
 
 ### Feedback

lib/lvgl/docs/widgets/core/btnmatrix.md

@@ -25,7 +25,7 @@ So in the example the first row will have 2 buttons each with 50% width and a se
 The buttons' width can be set relative to the other button in the same row with `lv_btnmatrix_set_btn_width(btnm, btn_id, width)`
 E.g. in a line with two buttons: *btnA, width = 1* and *btnB, width = 2*, *btnA* will have 33 % width and *btnB* will have 66 % width.
 It's similar to how the [`flex-grow`](https://developer.mozilla.org/en-US/docs/Web/CSS/flex-grow) property works in CSS.
-The width must be in the \[1..7\] range and the default width is 1.
+The width must be in the \[1..15\] range and the default width is 1.
 
 In addition to the width, each button can be customized with the following parameters:
 - `LV_BTNMATRIX_CTRL_HIDDEN` Makes a button hidden (hidden buttons still take up space in the layout, they are just not visible or clickable)

lib/lvgl/docs/widgets/core/dropdown.md

@@ -43,7 +43,7 @@ Options are passed to the drop-down list as a string with `lv_dropdown_set_optio
 
 The `lv_dropdown_add_option(dropdown, "New option", pos)` function inserts a new option to `pos` index.
 
-To save memory the options can set from a static(constant) string too with `lv_dropdown_set_static_options(dropdown, options)`.
+To save memory the options can set from a static(constant) string too with `lv_dropdown_set_options_static(dropdown, options)`.
 In this case the options string should be alive while the drop-down list exists and `lv_dropdown_add_option` can't be used
 
 You can select an option manually with `lv_dropdown_set_selected(dropdown, id)`, where `id` is the index of an option.

lib/lvgl/docs/widgets/core/label.md

@@ -44,7 +44,9 @@ This is not the case with `lv_label_set_text_static`. The buffer you pass to `lv
 
 ### Text recolor
 In the text, you can use commands to recolor parts of the text. For example: `"Write a #ff0000 red# word"`.
-This feature can be enabled individually for each label by `lv_label_set_recolor()` function.
+This feature can be enabled individually for each label by `lv_label_set_recolor()` function,
+recoloring is only supported when the text wrapped with `##ff0000 ... #`sintax is in one line,
+it is not supported in wrapped text, see example `Line wrap, recoloring and scrolling`.
 
 ### Text selection
 If enabled by `LV_LABEL_TEXT_SELECTION` part of the text can be selected. It's similar to when you use your mouse on a PC to select a text.

lib/lvgl/docs/widgets/extra/calendar.md

@@ -1,5 +1,7 @@
 # Calendar (lv_calendar)
 
+**From v8.1 the header is added directly into the Calendar widget and the API of the headers has been changed.**
+
 ## Overview
 
 The Calendar object is a classic calendar which can:
@@ -13,13 +15,16 @@ The Calendar is added to the default group (if it is set). Calendar is an editab
 To make the Calendar flexible, by default it doesn't show the current year or month. Instead, there are optional "headers" that can be attached to the calendar.
 
 ## Parts and Styles
-The calendar object uses the [Button matrix](/widgets/core/btnmatrix) object under the hood to arrange the days into a matrix.
-- `LV_PART_MAIN` The background of the calendar. Uses all the background related style properties.
-- `LV_PART_ITEMS` Refers to the dates and day names. Button matrix control flags are set to differentiate the buttons and a custom drawer event is added modify the properties of the buttons as follows:
-   - day names have no border, no background and drawn with a gray color
-   - days of the previous and next month have `LV_BTNMATRIX_CTRL_DISABLED` flag
-   - today has a thicker border with the theme's primary color
-   - highlighted days have some opacity with the theme's primary color.
+The Calendar is composed of 3 widegets
+- Container: A rectangle which is a container for the *Header* and the *Days*. Uses only `LV_PART_MAIN` where all the background related style properties are working.
+- Days: It's a [Button matrix](/widgets/core/btnmatrix) object under the hood to arrange the days into a matrix. `lv_calendar_get_btnmatrix(calendar)` can be used to get it.
+    - `LV_PART_MAIN` The background of the calendar. Uses all the background related style properties.
+    - `LV_PART_ITEMS` Refers to the dates and day names. Button matrix control flags are set to differentiate the buttons and a custom drawer event is added modify the properties of the buttons as follows:
+       - day names have no border, no background and drawn with a gray color
+       - days of the previous and next month have `LV_BTNMATRIX_CTRL_DISABLED` flag
+       - today has a thicker border with the theme's primary color
+       - highlighted days have some opacity with the theme's primary color.
+- Header: Not created by default, the details are up to the given header.
 
 ## Usage
 
@@ -53,8 +58,6 @@ Learn more about [Keys](/overview/indev).
 
 ## Headers
 
-**From v8.1 the header is added directly into the Calendar widget and the API of the headers has been changed.**
-
 ### Arrow buttons
 
 `lv_calendar_header_arrow_create(calendar)` creates a header that contains a left and right arrow on the sides and a text with the current year and month between them.

lib/lvgl/env_support/cmake/custom.cmake

@@ -63,6 +63,12 @@ install(
   FILES_MATCHING
   PATTERN "*.h")
 
+install(
+  FILES "${LV_CONF_PATH}"
+  DESTINATION "${CMAKE_INSTALL_PREFIX}/${INC_INSTALL_DIR}/../"
+  RENAME "lv_conf.h"
+  OPTIONAL)
+
 set_target_properties(
   lvgl
   PROPERTIES OUTPUT_NAME lvgl

lib/lvgl/env_support/cmake/esp.cmake

@@ -12,22 +12,43 @@ if(LV_MICROPYTHON)
     ${LVGL_ROOT_DIR}/../
     REQUIRES
     main)
+else()
+  if(CONFIG_LV_BUILD_EXAMPLES)
+    file(GLOB_RECURSE EXAMPLE_SOURCES ${LVGL_ROOT_DIR}/examples/*.c)
+    set_source_files_properties(${EXAMPLE_SOURCES} COMPILE_FLAGS "-Wno-unused-variable -Wno-format")
+  endif()
 
-  target_compile_definitions(${COMPONENT_LIB}
-                             INTERFACE "-DLV_CONF_INCLUDE_SIMPLE")
-
-  if(CONFIG_LV_ATTRIBUTE_FAST_MEM_USE_IRAM)
-    target_compile_definitions(${COMPONENT_LIB}
-                               INTERFACE "-DLV_ATTRIBUTE_FAST_MEM=IRAM_ATTR")
+  if(CONFIG_LV_USE_DEMO_WIDGETS)
+    file(GLOB_RECURSE DEMO_WIDGETS_SOURCES ${LVGL_ROOT_DIR}/demos/widgets/*.c)
+    list(APPEND DEMO_SOURCES ${DEMO_WIDGETS_SOURCES})
   endif()
-else()
-  idf_component_register(SRCS ${SOURCES} INCLUDE_DIRS ${LVGL_ROOT_DIR}
-                         ${LVGL_ROOT_DIR}/src ${LVGL_ROOT_DIR}/../)
+  if(CONFIG_LV_USE_DEMO_KEYPAD_AND_ENCODER)
+    file(GLOB_RECURSE DEMO_KEYPAD_AND_ENCODER_SOURCES ${LVGL_ROOT_DIR}/demos/keypad_encoder/*.c)
+    list(APPEND DEMO_SOURCES ${DEMO_KEYPAD_AND_ENCODER_SOURCES})
+  endif()
+  if(CONFIG_LV_USE_DEMO_BENCHMARK)
+    file(GLOB_RECURSE DEMO_BENCHMARK_SOURCES ${LVGL_ROOT_DIR}/demos/benchmark/*.c)
+    list(APPEND DEMO_SOURCES ${DEMO_BENCHMARK_SOURCES})
+  endif()
+  if(CONFIG_LV_USE_DEMO_STRESS)
+    file(GLOB_RECURSE DEMO_STRESS_SOURCES ${LVGL_ROOT_DIR}/demos/stress/*.c)
+    list(APPEND DEMO_SOURCES ${DEMO_STRESS_SOURCES})
+  endif()
+  if(CONFIG_LV_USE_DEMO_MUSIC)
+    file(GLOB_RECURSE DEMO_MUSIC_SOURCES ${LVGL_ROOT_DIR}/demos/music/*.c)
+    list(APPEND DEMO_SOURCES ${DEMO_MUSIC_SOURCES})
+    set_source_files_properties(${DEMO_MUSIC_SOURCES} COMPILE_FLAGS "-Wno-format")
+  endif()
+
+  idf_component_register(SRCS ${SOURCES} ${EXAMPLE_SOURCES} ${DEMO_SOURCES}
+      INCLUDE_DIRS ${LVGL_ROOT_DIR} ${LVGL_ROOT_DIR}/src ${LVGL_ROOT_DIR}/../
+                   ${LVGL_ROOT_DIR}/examples ${LVGL_ROOT_DIR}/demos
+      REQUIRES esp_timer)
+endif()
 
-  target_compile_definitions(${COMPONENT_LIB} PUBLIC "-DLV_CONF_INCLUDE_SIMPLE")
+target_compile_definitions(${COMPONENT_LIB} PUBLIC "-DLV_CONF_INCLUDE_SIMPLE")
 
-  if(CONFIG_LV_ATTRIBUTE_FAST_MEM_USE_IRAM)
-    target_compile_definitions(${COMPONENT_LIB}
-                               PUBLIC "-DLV_ATTRIBUTE_FAST_MEM=IRAM_ATTR")
-  endif()
+if(CONFIG_LV_ATTRIBUTE_FAST_MEM_USE_IRAM)
+  target_compile_definitions(${COMPONENT_LIB}
+                             PUBLIC "-DLV_ATTRIBUTE_FAST_MEM=IRAM_ATTR")
 endif()

lib/lvgl/env_support/cmsis-pack/LVGL.lvgl.pdsc

@@ -20,7 +20,7 @@
 -->
 
 
-<package schemaVersion="1.4" xmlns:xs="http://www.w3.org/2001/XMLSchema-instance" xs:noNamespaceSchemaLocation="PACK.xsd">
+<package schemaVersion="1.4" xmlns:xs="http://www.w3.org/2001/XMLSchema-instance" xs:noNamespaceSchemaLocation="https://raw.githubusercontent.com/Open-CMSIS-Pack/Open-CMSIS-Pack-Spec/v1.7.7/schema/PACK.xsd">
   <vendor>LVGL</vendor>
   <name>lvgl</name>
   <description>LVGL (Light and Versatile Graphics Library) is a free and open-source graphics library providing everything you need to create an embedded GUI with easy-to-use graphical elements, beautiful visual effects and a low memory footprint.</description>
@@ -36,12 +36,47 @@
   <repository type="git">https://github.com/lvgl/lvgl.git</repository>
 
   <releases>
-    <release date="2022-07-06" version="1.0.6" url="https://raw.githubusercontent.com/lvgl/lvgl/master/env_support/cmsis-pack/LVGL.lvgl.1.0.6.pack">
-      - LVGL 8.3.0 release
-      - Apply patch for memory leaking issue
-      - Apply patch to speed up non normal blend mode
-      - Add 9-key input mode to pinyin
-      - Other minor changes
+    <release date="2023-12-05" version="8.3.11" url="https://raw.githubusercontent.com/lvgl/lvgl/master/env_support/cmsis-pack/LVGL.lvgl.8.3.11.pack">
+      - LVGL 8.3.11
+      - Add LittleFS Library to LVGL8
+      - Backport Tiny TTF to LVGL8
+      - Some minor fixes
+    </release>
+    <release date="2023-09-19" version="8.3.10" url="https://github.com/lvgl/lvgl/raw/9e388055ec0bcad5179461e66d6dac6823129eee/env_support/cmsis-pack/LVGL.lvgl.8.3.10.pack">
+      - LVGL 8.3.10
+      - Some minor fixes
+    </release>
+    
+    <release date="2023-08-04" version="8.3.9" url="https://github.com/lvgl/lvgl/raw/bdf5bfb88ce107f16cf9128cf75e61394b3219d0/env_support/cmsis-pack/LVGL.lvgl.8.3.9.pack">
+      - LVGL 8.3.10
+      - Add snapshot, fragment, imgfont, gridnav, msg and monkey
+      - Other minor fixes
+    </release>
+    <release date="2023-07-04" version="8.3.8" url="https://github.com/lvgl/lvgl/raw/15433d69b9d8ae6aa74f49946874af81a0cc5921/env_support/cmsis-pack/LVGL.lvgl.8.3.8.pack">
+      - LVGL 8.3.8
+      - Add renesas-ra6m3 gpu adaptation
+      - Improve performance and add more features for PXP and VGLite
+      - Minor updates
+    </release>
+    <release date="2023-04-28" version="8.3.7" url="https://github.com/lvgl/lvgl/raw/2b56e04205481daa6575bd5f7ab5df59d11676eb/env_support/cmsis-pack/LVGL.lvgl.8.3.7.pack">
+      - LVGL 8.3.7
+      - Minor updates
+    </release>
+    <release date="2023-04-02" version="8.3.6" url="https://github.com/lvgl/lvgl/raw/6b0092c0d91b2c7bfded48e04cc7b486ed3a72bd/env_support/cmsis-pack/LVGL.lvgl.8.3.6.pack">
+      - LVGL 8.3.6 release
+      - Various fixes, See CHANGELOG.md
+    </release>
+    <release date="2023-02-06" version="8.3.5" url="https://github.com/lvgl/lvgl/raw/e7e8cf846dce96f7542e27b5c9655bab680c31a1/env_support/cmsis-pack/LVGL.lvgl.8.3.5.pack">
+      - LVGL 8.3.5 release
+      - Use LVGL version as the cmsis-pack version
+      - Fix GPU support for NXP PXP and NXP VGLite
+      - Rework stm32 DMA2D support
+      - Various fixes
+    </release>
+    <release date="2022-12-31" version="1.0.6-p1" url="https://github.com/lvgl/lvgl/raw/dbb15bb3ea0365373bc1ba8b182556f937e61e7d/env_support/cmsis-pack/LVGL.lvgl.1.0.6-p1.pack">
+      - LVGL 8.3.4 release
+      - Update GPU Arm-2D support
+      - Various fixes
     </release>
     <release date="2022-06-29" version="1.0.5" url="https://github.com/GorgonMeducer/lvgl/raw/922108dbbe6d1c0be1069c342ca8693afee8c169/env_support/cmsis-pack/LVGL.lvgl.1.0.5.pack">
       - LVGL 8.3.0-dev
@@ -159,6 +194,90 @@
             <require Cclass="Acceleration" Cgroup="Arm-2D"/>
         </condition>
 
+        <condition id="LVGL-GPU-Arm-2D">
+            <description>Enable LVGL Arm-2D GPU Support</description>
+            <require Cclass="LVGL" Cgroup="lvgl" Csub="Essential"/>
+            <!--<deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU Arm-2D"/>-->
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU STM32-DMA2D"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU SWM341-DMA2D"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-PXP"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-VGLite"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU GD32-IPA"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="LVGL-GPU-RA6M3-G2D"/>
+        </condition>
+        
+        <condition id="LVGL-GPU-STM32-DMA2D">
+            <description>Enable LVGL Arm-2D GPU Support</description>
+            <require Cclass="LVGL" Cgroup="lvgl" Csub="Essential"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU Arm-2D"/>
+            <!--<deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU STM32-DMA2D"/>-->
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU SWM341-DMA2D"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-PXP"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-VGLite"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU GD32-IPA"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="LVGL-GPU-RA6M3-G2D"/>
+        </condition>
+        
+        <condition id="LVGL-GPU-SWM341-DMA2D">
+            <description>Enable LVGL Arm-2D GPU Support</description>
+            <require Cclass="LVGL" Cgroup="lvgl" Csub="Essential"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU Arm-2D"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU STM32-DMA2D"/>
+            <!--<deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU SWM341-DMA2D"/>-->
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-PXP"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-VGLite"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU GD32-IPA"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="LVGL-GPU-RA6M3-G2D"/>
+        </condition>
+        
+        <condition id="LVGL-GPU-NXP-PXP">
+            <description>Enable LVGL Arm-2D GPU Support</description>
+            <require Cclass="LVGL" Cgroup="lvgl" Csub="Essential"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU Arm-2D"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU STM32-DMA2D"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU SWM341-DMA2D"/>
+            <!--<deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-PXP"/>-->
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-VGLite"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU GD32-IPA"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="LVGL-GPU-RA6M3-G2D"/>
+        </condition>
+        
+        <condition id="LVGL-GPU-NXP-VGLite">
+            <description>Enable LVGL Arm-2D GPU Support</description>
+            <require Cclass="LVGL" Cgroup="lvgl" Csub="Essential"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU Arm-2D"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU STM32-DMA2D"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU SWM341-DMA2D"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-PXP"/>
+            <!--<deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-VGLite"/>-->
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU GD32-IPA"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="LVGL-GPU-RA6M3-G2D"/>
+        </condition>
+        
+        <condition id="LVGL-GPU-GD32-IPA">
+            <description>Enable LVGL Arm-2D GPU Support</description>
+            <require Cclass="LVGL" Cgroup="lvgl" Csub="Essential"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU Arm-2D"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU STM32-DMA2D"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU SWM341-DMA2D"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-PXP"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-VGLite"/>
+            <!--<deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU GD32-IPA"/>-->
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="LVGL-GPU-RA6M3-G2D"/>
+        </condition>
+
+        <condition id="LVGL-GPU-RA6M3-G2D">
+            <description>Enable LVGL Arm-2D GPU Support</description>
+            <require Cclass="LVGL" Cgroup="lvgl" Csub="Essential"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU Arm-2D"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU STM32-DMA2D"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU SWM341-DMA2D"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-PXP"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-VGLite"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU GD32-IPA"/>
+            <!--<deny Cclass="LVGL" Cgroup="lvgl" Csub="LVGL-GPU-RA6M3-G2D"/>-->
+        </condition>
+
     </conditions>
   <!-- apis section (optional - for Application Programming Interface descriptions) -->
   <!--
@@ -191,7 +310,7 @@
   -->
 
     <components>
-        <bundle Cbundle="LVGL" Cclass="LVGL" Cversion="8.3.0">
+        <bundle Cbundle="LVGL" Cclass="LVGL" Cversion="8.3.11">
             <description>LVGL (Light and Versatile Graphics Library) is a free and open-source graphics library providing everything you need to create an embedded GUI with easy-to-use graphical elements, beautiful visual effects and a low memory footprint.</description>
             <doc></doc>
             <component Cgroup="lvgl" Csub="Essential" >
@@ -324,10 +443,18 @@
                 <file category="sourceC"            name="src/widgets/lv_textarea.c" />
 
                 <!-- general -->
-                <file category="preIncludeGlobal"   name="lv_conf_cmsis.h" attr="config" version="1.0.2" />
+                <file category="preIncludeGlobal"   name="lv_conf_cmsis.h" attr="config" version="1.0.4" />
                 <file category="sourceC"            name="lv_cmsis_pack.c" attr="config" version="1.0.0" />
                 <file category="header"             name="lvgl.h" />
                 <file category="doc"                name="README.md"/>
+                
+                <!-- code template -->
+                <file category="header"       name="examples/porting/lv_port_disp_template.h"   attr="template" select="Display port template"          version="2.0.0"/>
+                <file category="sourceC"      name="examples/porting/lv_port_disp_template.c"   attr="template" select="Display port template"          version="2.0.0"/>
+                <file category="header"       name="examples/porting/lv_port_indev_template.h"  attr="template" select="Input devices port template"    version="2.0.0"/>
+                <file category="sourceC"      name="examples/porting/lv_port_indev_template.c"  attr="template" select="Input devices port template"    version="2.0.0"/>
+                <file category="header"       name="examples/porting/lv_port_fs_template.h"     attr="template" select="File system port template"      version="2.0.0"/>
+                <file category="sourceC"      name="examples/porting/lv_port_fs_template.c"     attr="template" select="File system port template"      version="2.0.0"/>
 
               </files>
 
@@ -360,7 +487,7 @@
               </files>
             </component>
 
-            <component Cgroup="lvgl" Csub="GPU Arm-2D"  condition="LVGL-Essential" Cversion="1.0.3">
+            <component Cgroup="lvgl" Csub="GPU Arm-2D"  condition="LVGL-GPU-Arm-2D" Cversion="1.2.2">
               <description>A 2D image processing library from Arm (i.e. Arm-2D) for All Cortex-M processors including Cortex-M0</description>
               <files>
               <file category="sourceC"      name="src/draw/arm2d/lv_gpu_arm2d.c" condition="Arm-2D"/>
@@ -375,7 +502,7 @@
 
             </component>
 
-            <component Cgroup="lvgl" Csub="GPU STM32-DMA2D"  condition="LVGL-Essential">
+            <component Cgroup="lvgl" Csub="GPU STM32-DMA2D"  condition="LVGL-GPU-STM32-DMA2D">
               <description>An hardware acceleration from STM32-DMA2D</description>
               <files>
               <file category="sourceC"            name="src/draw/stm32_dma2d/lv_gpu_stm32_dma2d.c" />
@@ -389,7 +516,7 @@
 
             </component>
 
-            <component Cgroup="lvgl" Csub="GPU SWM341-DMA2D"  condition="LVGL-Essential">
+            <component Cgroup="lvgl" Csub="GPU SWM341-DMA2D"  condition="LVGL-GPU-SWM341-DMA2D">
               <description>An hardware acceleration from SWM341-DMA2D</description>
               <files>
               <file category="sourceC"            name="src/draw/swm341_dma2d/lv_gpu_swm341_dma2d.c" />
@@ -403,13 +530,13 @@
               
             </component>
             
-            <component Cgroup="lvgl" Csub="GPU NXP-PXP"  condition="LVGL-Essential">
+            <component Cgroup="lvgl" Csub="GPU NXP-PXP"  condition="LVGL-GPU-NXP-PXP">
               <description>An hardware acceleration from NXP-PXP</description>
               <files>
-              <file category="sourceC"            name="src/draw/nxp/lv_gpu_nxp.c" />
-              <file category="sourceC"            name="src/draw/nxp/pxp/lv_draw_pxp_blend.c" />
-              <file category="sourceC"            name="src/draw/nxp/pxp/lv_gpu_nxp_pxp.c" />
-              <file category="sourceC"            name="src/draw/nxp/pxp/lv_gpu_nxp_pxp_osa.c" />
+                <file category="sourceC"            name="src/draw/nxp/pxp/lv_draw_pxp.c" />
+                <file category="sourceC"            name="src/draw/nxp/pxp/lv_draw_pxp_blend.c" />
+                <file category="sourceC"            name="src/draw/nxp/pxp/lv_gpu_nxp_pxp.c" />
+                <file category="sourceC"            name="src/draw/nxp/pxp/lv_gpu_nxp_pxp_osa.c" />
               </files>
 
               <RTE_Components_h>
@@ -420,14 +547,16 @@
 
             </component>
 
-            <component Cgroup="lvgl" Csub="GPU NXP-VGLite"  condition="LVGL-Essential">
+            <component Cgroup="lvgl" Csub="GPU NXP-VGLite"  condition="LVGL-GPU-NXP-VGLite">
               <description>An hardware acceleration from NXP-VGLite</description>
               <files>
-              <file category="sourceC"            name="src/draw/nxp/lv_gpu_nxp.c" />
-              <file category="sourceC"            name="src/draw/nxp/vglite/lv_draw_vglite_arc.c" />
-              <file category="sourceC"            name="src/draw/nxp/vglite/lv_draw_vglite_blend.c" />
-              <file category="sourceC"            name="src/draw/nxp/vglite/lv_draw_vglite_rect.c" />
-              <file category="sourceC"            name="src/draw/nxp/vglite/lv_gpu_nxp_vglite.c" />
+                <file category="sourceC"            name="src/draw/nxp/vglite/lv_draw_vglite.c" />
+                <file category="sourceC"            name="src/draw/nxp/vglite/lv_draw_vglite_arc.c" />
+                <file category="sourceC"            name="src/draw/nxp/vglite/lv_draw_vglite_blend.c" />
+                <file category="sourceC"            name="src/draw/nxp/vglite/lv_draw_vglite_line.c" />
+                <file category="sourceC"            name="src/draw/nxp/vglite/lv_draw_vglite_rect.c" />
+                <file category="sourceC"            name="src/draw/nxp/vglite/lv_vglite_buf.c" />
+                <file category="sourceC"            name="src/draw/nxp/vglite/lv_vglite_utils.c" />
               </files>
 
               <RTE_Components_h>
@@ -438,6 +567,22 @@
 
             </component>
 
+
+            <component Cgroup="lvgl" Csub="GPU RA6M3-G2D"  condition="LVGL-GPU-RA6M3-G2D">
+              <description>An hardware acceleration from Renesas RA6M3-G2D</description>
+              <files>
+                <file category="sourceC"            name="src/draw/renesas/lv_gpu_d2_draw_label.c" />
+                <file category="sourceC"            name="src/draw/renesas/lv_gpu_d2_ra6m3.c" />
+              </files>
+              
+              <RTE_Components_h>
+              
+/*! \brief enable RA6M3-G2D */
+#define LV_USE_GPU_RA6M3_G2D      1
+              </RTE_Components_h>
+              
+            </component>
+
             <component Cgroup="lvgl" Csub="Extra Themes"  condition="LVGL-Essential">
               <description>Extra Themes, Widgets and Layouts</description>
               <files>
@@ -583,10 +728,27 @@
                 <file category="sourceC"            name="src/extra/libs/fsdrv/lv_fs_fatfs.c" />
                 <file category="sourceC"            name="src/extra/libs/fsdrv/lv_fs_posix.c" />
                 <file category="sourceC"            name="src/extra/libs/fsdrv/lv_fs_stdio.c" />
+                <file category="sourceC"            name="src/extra/libs/fsdrv/lv_fs_littlefs.c" />
+              </files>
+
+            </component>
+            
+            <component Cgroup="lvgl" Csub="Libs Tiny TTF"  condition="LVGL-Essential">
+              <description>Add Tiny TTF Library</description>
+              <files>
+                <!-- src/extra/libs/tiny_ttf -->
+                <file category="sourceC"            name="src/extra/libs/tiny_ttf/lv_tiny_ttf.c" />
               </files>
+              
+              <RTE_Components_h>
 
+/*! \brief enable Tiny TTF Library */
+#define LV_USE_TINY_TTF         1
+              </RTE_Components_h>
+              
             </component>
 
+
             <component Cgroup="lvgl" Csub="Libs RLOTTIE"  condition="LVGL-Essential">
               <description>Add RLOTTIE support, an extra librbary is required.</description>
               <files>
@@ -597,7 +759,7 @@
               <RTE_Components_h>
 
 /*! \brief enable RLOTTIE support */
-#define LV_USE_RLOTTIE         1
+#define LV_USE_RLOTTIE          1
               </RTE_Components_h>
 
             </component>
@@ -612,7 +774,7 @@
               <RTE_Components_h>
 
 /*! \brief enable ffmpeg support */
-#define LV_USE_FFMPEG         1
+#define LV_USE_FFMPEG           1
               </RTE_Components_h>
 
             </component>
@@ -627,7 +789,98 @@
               <RTE_Components_h>
 
 /*! \brief enable ffmpeg support */
-#define LV_USE_IME_PINYIN         1
+#define LV_USE_IME_PINYIN       1
+              </RTE_Components_h>
+
+            </component>
+
+            <component Cgroup="lvgl" Csub="Snapshot"  condition="LVGL-Essential">
+              <description>Add the Snapshot service</description>
+              <files>
+                <!-- src/extra/others/snapshot -->
+                <file category="sourceC"            name="src/extra/others/snapshot/lv_snapshot.c" />
+              </files>
+
+              <RTE_Components_h>
+
+/*! \brief enable snapshot support */
+#define LV_USE_SNAPSHOT         1
+              </RTE_Components_h>
+
+            </component>
+
+            <component Cgroup="lvgl" Csub="Fragment"  condition="LVGL-Essential">
+              <description>Add the Fragment service</description>
+              <files>
+                <!-- src/extra/others/fragment -->
+                <file category="sourceC"            name="src/extra/others/fragment/lv_fragment.c" />
+                <file category="sourceC"            name="src/extra/others/fragment/lv_fragment_manager.c" />
+              </files>
+
+              <RTE_Components_h>
+
+/*! \brief enable fragment support */
+#define LV_USE_FRAGMENT         1
+              </RTE_Components_h>
+
+            </component>
+
+            <component Cgroup="lvgl" Csub="Grid Navigation"  condition="LVGL-Essential">
+              <description>Add the Grid Navigation service</description>
+              <files>
+                <!-- src/extra/others/gridnav -->
+                <file category="sourceC"            name="src/extra/others/gridnav/lv_gridnav.c" />
+              </files>
+
+              <RTE_Components_h>
+
+/*! \brief enable the Grid Navigation support*/
+#define LV_USE_GRIDNAV          1
+              </RTE_Components_h>
+
+            </component>
+
+            <component Cgroup="lvgl" Csub="Image Font"  condition="LVGL-Essential">
+              <description>Add the Image Font service</description>
+              <files>
+                <!-- src/extra/others/imgfont -->
+                <file category="sourceC"            name="src/extra/others/imgfont/lv_imgfont.c" />
+              </files>
+
+              <RTE_Components_h>
+
+/*! \brief enable the image font support*/
+#define LV_USE_IMGFONT          1
+              </RTE_Components_h>
+
+            </component>
+
+            <component Cgroup="lvgl" Csub="Monkey"  condition="LVGL-Essential">
+              <description>Add the Monkey service</description>
+              <files>
+                <!-- src/extra/others/monkey -->
+                <file category="sourceC"            name="src/extra/others/monkey/lv_monkey.c" />
+              </files>
+
+              <RTE_Components_h>
+
+/*! \brief enable the monkey service support*/
+#define LV_USE_MONKEY           1
+              </RTE_Components_h>
+
+            </component>
+
+            <component Cgroup="lvgl" Csub="Message"  condition="LVGL-Essential">
+              <description>Add the Message service</description>
+              <files>
+                <!-- src/extra/others/msg -->
+                <file category="sourceC"            name="src/extra/others/msg/lv_msg.c" />
+              </files>
+
+              <RTE_Components_h>
+
+/*! \brief enable the message service support*/
+#define LV_USE_MSG              1
               </RTE_Components_h>
 
             </component>
@@ -656,7 +909,7 @@
               <RTE_Components_h>
 
 /*! \brief enable demo:bencharmk */
-#define LV_USE_DEMO_BENCHMARK         1
+#define LV_USE_DEMO_BENCHMARK    1
               </RTE_Components_h>
 
             </component>
@@ -676,7 +929,7 @@
               <RTE_Components_h>
 
 /*! \brief enable demo:widgets support */
-#define LV_USE_DEMO_WIDGETS         1
+#define LV_USE_DEMO_WIDGETS     1
               </RTE_Components_h>
 
             </component>

lib/lvgl/env_support/cmsis-pack/LVGL.pidx

@@ -2,8 +2,8 @@
 <index schemaVersion="1.0.0" xs:noNamespaceSchemaLocation="PackIndex.xsd" xmlns:xs="http://www.w3.org/2001/XMLSchema-instance">
   <vendor>LVGL</vendor>
   <url>https://raw.githubusercontent.com/lvgl/lvgl/master/env_support/cmsis-pack/</url>
-  <timestamp>2022-07-06T00:09:27</timestamp>
+  <timestamp>2023-12-09</timestamp>
   <pindex>
-    <pdsc url="https://raw.githubusercontent.com/lvgl/lvgl/master/env_support/cmsis-pack/" vendor="LVGL" name="lvgl" version="1.0.6"/>
+    <pdsc url="https://raw.githubusercontent.com/lvgl/lvgl/release/v8.3/env_support/cmsis-pack/" vendor="LVGL" name="lvgl" version="8.3.11"/>
   </pindex>
 </index>

lib/lvgl/env_support/cmsis-pack/README.md

@@ -46,12 +46,33 @@ remove the misleading guide above this code segment.
    - LV_USE_GPU_SWM341_DMA2D
    - LV_USE_GPU_ARM2D
    - LV_USE_IME_PINYIN
+   - LV_USE_PNG
+   - LV_USE_BMP
+   - LV_USE_SJPG
+   - LV_USE_GIF
+   - LV_USE_QRCODE
+   - LV_USE_FREETYPE
+   - LV_USE_TINY_TTF
+   - LV_USE_RLOTTIE
+   - LV_USE_FFMPEG
+   - LV_USE_SNAPSHOT
+   - LV_USE_MONKEY
+   - LV_USE_GRIDNAV
+   - LV_USE_FRAGMENT
+   - LV_USE_IMGFONT
+   - LV_USE_MSG
+   - LV_USE_IME_PINYIN
 5. Update macro `LV_ATTRIBUTE_MEM_ALIGN` and `LV_ATTRIBUTE_MEM_ALIGN_SIZE`  to force a WORD alignment.
 ```c
 #define LV_ATTRIBUTE_MEM_ALIGN_SIZE     4
 #define LV_ATTRIBUTE_MEM_ALIGN          __attribute__((aligned(4)))
 ```
 Update macro `LV_MEM_SIZE` to `(64*1024U)`.
+
+Update macro `LV_FONT_MONTSERRAT_12` to `1`.
+
+Update macro `LV_FONT_MONTSERRAT_12` to `1`.
+
 6. Update Theme related macros:
 
 ```c
@@ -89,25 +110,41 @@ Update macro `LV_MEM_SIZE` to `(64*1024U)`.
     #define LV_TICK_CUSTOM 1
     #if LV_TICK_CUSTOM
         extern uint32_t SystemCoreClock;
-        #define LV_TICK_CUSTOM_INCLUDE             "perf_counter.h"
-
-        #if __PER_COUNTER_VER__ < 10902ul
-            #define LV_TICK_CUSTOM_SYS_TIME_EXPR    ((uint32_t)get_system_ticks() / (SystemCoreClock / 1000ul))
-        #else
-            #define LV_TICK_CUSTOM_SYS_TIME_EXPR    get_system_ms()
-        #endif
+        #define LV_TICK_CUSTOM_INCLUDE          "perf_counter.h"
+        #define LV_TICK_CUSTOM_SYS_TIME_EXPR    get_system_ms()
     #endif   /*LV_TICK_CUSTOM*/
 #else
     #define LV_TICK_CUSTOM 0
     #if LV_TICK_CUSTOM
         #define LV_TICK_CUSTOM_INCLUDE "Arduino.h"         /*Header for the system time function*/
         #define LV_TICK_CUSTOM_SYS_TIME_EXPR (millis())    /*Expression evaluating to current system time in ms*/
+    /*If using lvgl as ESP32 component*/
+    // #define LV_TICK_CUSTOM_INCLUDE "esp_timer.h"
+    // #define LV_TICK_CUSTOM_SYS_TIME_EXPR ((esp_timer_get_time() / 1000LL))
     #endif   /*LV_TICK_CUSTOM*/
 #endif       /*__PERF_COUNTER__*/
 ```
-9. Thoroughly remove the `DEMO USAGE` section.
-10. Thoroughly remove the '3rd party libraries' section.
-10. rename '**lv_conf_template.h**' to '**lv_conf_cmsis.h**'.
+
+
+9. Remove all content in `DEMO USAGE` section but keep the following:
+
+```c
+/*Show some widget. It might be required to increase `LV_MEM_SIZE` */
+#if LV_USE_DEMO_WIDGETS
+	#define LV_DEMO_WIDGETS_SLIDESHOW 0
+#endif
+
+/*Benchmark your system*/
+#if LV_USE_DEMO_BENCHMARK
+/*Use RGB565A8 images with 16 bit color depth instead of ARGB8565*/
+	#define LV_DEMO_BENCHMARK_RGB565A8 1
+#endif
+```
+
+
+
+10. Thoroughly remove the `3rd party libraries` section.
+11. rename '**lv_conf_template.h**' to '**lv_conf_cmsis.h**'.
 
 
 

lib/lvgl/env_support/cmsis-pack/gen_pack.sh

@@ -21,8 +21,8 @@ if [ `uname -s` = "Linux" ]
   CMSIS_PACK_PATH="/home/$USER/.arm/Packs/ARM/CMSIS/5.7.0/"
   PATH_TO_ADD="$CMSIS_PACK_PATH/CMSIS/Utilities/Linux64/"
 else
-  CMSIS_PACK_PATH="/C/Users/gabriel/AppData/Local/Arm/Packs/ARM/CMSIS/5.7.0"
-  PATH_TO_ADD="/C/Program Files (x86)/7-Zip/:$CMSIS_PACK_PATH/CMSIS/Utilities/Win32/:/C/xmllint/"
+  CMSIS_PACK_PATH="/C/Users/$USER/AppData/Local/Arm/Packs/ARM/CMSIS/5.7.0"
+  PATH_TO_ADD="/C/Program Files (x86)/7-Zip/:/C/Program Files/7-Zip/:$CMSIS_PACK_PATH/CMSIS/Utilities/Win32/:/C/xmllint/"
 fi
 [[ ":$PATH:" != *":$PATH_TO_ADD}:"* ]] && PATH="${PATH}:${PATH_TO_ADD}"
 echo $PATH_TO_ADD appended to PATH