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docs(image): document the fact that indexed data is stored as argb8888 (#8620)
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Co-authored-by: Gabor Kiss-Vamosi <kisvegabor@gmail.com> Co-authored-by: Liam Howatt <30486941+liamHowatt@users.noreply.github.com>
This commit is contained in:
André Costa
GitHub
@@ -65,6 +65,11 @@ Various built-in color formats are supported:
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- :cpp:enumerator:`LV_COLOR_FORMAT_NATIVE_WITH_ALPHA`: Like :cpp:enumerator:`LV_COLOR_FORMAT_NATIVE` but it also adds an alpha (transparency) byte for every pixel.
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- :cpp:enumerator:`LV_COLOR_FORMAT_I1`, :cpp:enumerator:`LV_COLOR_FORMAT_I2`, :cpp:enumerator:`LV_COLOR_FORMAT_I4`, :cpp:enumerator:`LV_COLOR_FORMAT_I8`:
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Uses a palette with 2, 4, 16 or 256 colors and stores each pixel in 1, 2, 4 or 8 bits.
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Since the colors in the palette can be anything, the pixel data for these formats is stored as ``ARGB8888``.
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When using LVGL's SW render, make sure ``LV_DRAW_SW_SUPPORT_ARGB8888`` is set to ``1``
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in your LVGL config.
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- :cpp:enumerator:`LV_COLOR_FORMAT_A1`, :cpp:enumerator:`LV_COLOR_FORMAT_A2`, :cpp:enumerator:`LV_COLOR_FORMAT_A4`, :cpp:enumerator:`LV_COLOR_FORMAT_A8`:
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**Only stores the Alpha value with 1, 2, 4 or 8 bits.** The pixels take the color of ``style.img_recolor`` and
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the set opacity. The source image has to be an alpha channel. This is
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