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28 lines
1.2 KiB
ReStructuredText
28 lines
1.2 KiB
ReStructuredText
.. _vg_lite_tvg:
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=================
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VG-Lite Simulator
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=================
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LVGL integrates a VG-Lite simulator based on ThorVG.
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Its purpose is to simplify the debugging of VG-Lite adaptation and reduce the time of debugging and locating problems on hardware devices.
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It has been integrated into the CI automated compilation and testing process to ensure that the VG-Lite rendering backend can be fully tested after each PR modification.
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How It Works
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************
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Sort out the APIs in the ``vg_lite.h`` header file provided by the vendor, re-implement the APIs using `ThorVG <https://github.com/thorvg/thorvg>`_,
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and simulate the same rendering images as the real hardware on the simulator.
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Configuration
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*************
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1. Enable VG-Lite rendering backend, see :ref:`vglite`.
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2. Enable ThorVG and turn on the configuration :c:macro:`LV_USE_THORVG_INTERNAL` or :c:macro:`LV_USE_THORVG_EXTERNAL`.
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It is recommended to use the internal ThorVG library to ensure uniform rendering results.
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3. Enable :c:macro:`LV_USE_VG_LITE_THORVG` and set :c:macro:`LV_DRAW_BUF_ALIGN` to 64. The rest of the options can remain default.
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Make sure :c:macro:`LV_VG_LITE_USE_GPU_INIT` is enabled, because the thorvg drawing context needs to be initialized before it can be used.
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