git_clone/thorvg
1
0
Fork 0
mirror of https://github.com/thorvg/thorvg.git synced 2025-06-14 12:04:29 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 5

sw_engine: corrected a wrong blending equation at 8 bits grayscale rle.

Browse source
This commit is contained in:
Hermet Park 2023-09-13 14:36:09 +09:00 • committed by Hermet Park
parent 3a0f3536ad
commit e9490e375c
1 changed files with 9 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
src/renderer/sw_engine/tvgSwRaster.cpp
View file

@ -620,7 +620,15 @@ static bool _rasterSolidRle(SwSurface* surface, const SwRleData* rle, uint8_t r,
//8bit grayscale //8bit grayscale
} else if (surface->channelSize == sizeof(uint8_t)) { } else if (surface->channelSize == sizeof(uint8_t)) {
for (uint32_t i = 0; i < rle->size; ++i, ++span) { for (uint32_t i = 0; i < rle->size; ++i, ++span) {
rasterGrayscale8(surface->buf8, span->coverage, span->y * surface->stride + span->x, span->len); if (span->coverage == 255) {
rasterGrayscale8(surface->buf8, span->coverage, span->y * surface->stride + span->x, span->len);
} else {
auto dst = &surface->buf8[span->y * surface->stride + span->x];
auto ialpha = 255 - span->coverage;
for (uint32_t x = 0; x < span->len; ++x, ++dst) {
*dst = span->coverage + MULTIPLY(*dst, ialpha);
}
}
} }
} }
return true; return true;