You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
28 lines
936 B
Markdown
28 lines
936 B
Markdown
2 years ago
|
|
||
|
|
# PNG decoder
|
||
|
|
|
||
|
|
Allow the use of PNG images in LVGL. This implementation uses [lodepng](https://github.com/lvandeve/lodepng) library.
|
||
|
|
|
||
|
|
If enabled in `lv_conf.h` by `LV_USE_PNG` LVGL will register a new image decoder automatically so PNG files can be directly used as any other image sources.
|
||
|
|
|
||
|
|
Note that, a file system driver needs to registered to open images from files. Read more about it [here](https://docs.lvgl.io/master/overview/file-system.html) or just enable one in `lv_conf.h` with `LV_USE_FS_...`
|
||
|
|
|
||
|
|
The whole PNG image is decoded so during decoding RAM equals to `image width x image height x 4` bytes are required.
|
||
|
|
|
||
|
|
As it might take significant time to decode PNG images LVGL's [images caching](https://docs.lvgl.io/master/overview/image.html#image-caching) feature can be useful.
|
||
|
|
|
||
|
|
## Example
|
||
|
|
```eval_rst
|
||
|
|
|
||
|
|
.. include:: ../../examples/libs/png/index.rst
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
## API
|
||
|
|
|
||
|
|
```eval_rst
|
||
|
|
|
||
|
|
.. doxygenfile:: lv_png.h
|
||
|
|
:project: lvgl
|
||
|
|
|