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53 lines
1.1 KiB
53 lines
1.1 KiB
11 months ago
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.. _libpng:
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==============
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libpng decoder
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==============
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libpng is the official PNG reference library. It supports almost all PNG features, is extensible, and has been extensively tested for over 28 years.
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Detailed introduction: http://www.libpng.org/pub/png/libpng.html
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Install
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-------
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.. code:: bash
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sudo apt install libpng-dev
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Add libpng to your project
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--------------------------
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.. code:: cmake
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find_package(PNG REQUIRED)
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include_directories(${PNG_INCLUDE_DIR})
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target_link_libraries(${PROJECT_NAME} PRIVATE ${PNG_LIBRARIES})
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.. _libpng_usage:
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Usage
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-----
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Enable :c:macro:`LV_USE_LIBPNG` in ``lv_conf.h``.
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See the examples below.
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It should be noted that each image of this decoder needs to consume ``width x height x 4`` bytes of RAM,
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and it needs to be combined with the :ref:`overview_image_caching` feature to ensure that the memory usage is within a reasonable range.
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The decoded image is stored in RGBA pixel format.
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.. _libpng_example:
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Example
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-------
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.. include:: ../examples/libs/libpng/index.rst
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.. _libpng_api:
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API
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---
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:ref:`libpng`
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