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32 lines
835 B
ReStructuredText
32 lines
835 B
ReStructuredText
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===========
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PNG decoder
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===========
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Allow the use of PNG images in LVGL. This implementation uses
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`lodepng <https://github.com/lvandeve/lodepng>`__ library.
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If enabled in ``lv_conf.h`` by :c:macro:`LV_USE_PNG` LVGL will register a new
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image decoder automatically so PNG files can be directly used as any
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other image sources.
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Note that, a file system driver needs to registered to open images from
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files. Read more about it :ref:`file-system` or just
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enable one in ``lv_conf.h`` with ``LV_USE_FS_...``
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The whole PNG image is decoded so during decoding RAM equals to
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``image width x image height x 4`` bytes are required.
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As it might take significant time to decode PNG images LVGL’s :ref:`image-caching` feature can be useful.
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Example
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-------
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.. include:: ../examples/libs/png/index.rst
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API
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---
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:ref:`lv_png`
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:ref:`lodepng`
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