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sw_engine raster: fixed a wrong composition instruction.

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it's a regression bug.

@Issue: https://github.com/thorvg/thorvg/issues/1540
This commit is contained in:
Hermet Park 2023-07-28 18:25:34 +09:00 • committed by Hermet Park
parent 68b8fce501
commit 1b7c882be4
1 changed files with 2 additions and 1 deletions
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3
src/lib/sw_engine/tvgSwRaster.cpp
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@ -561,7 +561,8 @@ static bool _rasterMattedRle(SwSurface* surface, SwRleData* rle, uint8_t r, uint
if (span->coverage == 255) src = color;
else src = ALPHA_BLEND(color, span->coverage);
for (uint32_t x = 0; x < span->len; ++x, ++dst, cmp += csize) {
*dst = INTERPOLATE(src, *dst, alpha(cmp));
auto tmp = ALPHA_BLEND(src, alpha(cmp));
*dst = tmp + ALPHA_BLEND(*dst, IA(tmp));
}
}
return true;