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sw_engine: Correct the color conversion condition.

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The color conversion is supposed to take into account the differences between
straight alpha premultiplied color and pre-multiplied alpha color.

The previous logic does not perfectly cover these conditions.

The problem was occured in the thorvg viewer with a jpeg bgra format.
This commit is contained in:
Hermet Park 2023-09-26 18:38:00 +09:00 • committed by Hermet Park
parent e8fd7e2b85
commit 5ecd3fb479
1 changed files with 2 additions and 2 deletions
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4
src/renderer/sw_engine/tvgSwRaster.cpp
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@ -2024,11 +2024,11 @@ bool rasterConvertCS(Surface* surface, ColorSpace to)
//TOOD: Support SIMD accelerations //TOOD: Support SIMD accelerations
auto from = surface->cs; auto from = surface->cs;
if ((from == ColorSpace::ABGR8888 && to == ColorSpace::ARGB8888) || (from == ColorSpace::ABGR8888S && to == ColorSpace::ARGB8888S)) { if (((from == ColorSpace::ABGR8888) || (from == ColorSpace::ABGR8888S)) && ((to == ColorSpace::ARGB8888) || (to == ColorSpace::ARGB8888S))) {
surface->cs = to; surface->cs = to;
return cRasterABGRtoARGB(surface); return cRasterABGRtoARGB(surface);
} }
if ((from == ColorSpace::ARGB8888 && to == ColorSpace::ABGR8888) || (from == ColorSpace::ARGB8888S && to == ColorSpace::ABGR8888S)) { if (((from == ColorSpace::ARGB8888) || (from == ColorSpace::ARGB8888S)) && ((to == ColorSpace::ABGR8888) || (to == ColorSpace::ABGR8888S))) {
surface->cs = to; surface->cs = to;
return cRasterARGBtoABGR(surface); return cRasterARGBtoABGR(surface);
} }