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Gabor Kiss-Vamosi 18f61c5f77 arch add small 3rd party libs to lvgl (#2569 )

* move png, sjpg, bmp, gif, fs_if to extra/libs

* reorganize the examples

* update lv_conf_internal.h

* fix warnings

* add freetype

* remove unused assets

* add the new libs to build tests

* update the docs

2021-10-04 14:34:11 +02:00

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.. include:: /header.rst 
:github_url: |github_link_base|/libs/png.md

PNG decoder

Allow the use of PNG images in LVGL. This implementation uses 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 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 feature can be useful.

Example


.. include:: ../../../examples/libs/png/index.rst

API


.. doxygenfile:: lv_png.h
  :project: lvgl

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PNG decoder

Example

API

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