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sw_engine: Added missing matting and blending for direct images

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issue: https://github.com/thorvg/thorvg/issues/1767
This commit is contained in:
Hermet Park 2024-09-11 00:23:46 +09:00
parent cfc3c26e90
commit 1aa5742feb
1 changed files with 42 additions and 2 deletions
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44
src/renderer/sw_engine/tvgSwRaster.cpp
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@ -1431,12 +1431,52 @@ static bool _rasterDirectImage(SwSurface* surface, const SwImage* image, const S
}
static bool _rasterDirectMattedBlendingImage(SwSurface* surface, const SwImage* image, const SwBBox& region, uint8_t opacity)
{
if (surface->channelSize == sizeof(uint8_t)) {
TVGERR("SW_ENGINE", "Not supported grayscale image!");
return false;
}
auto h = static_cast<uint32_t>(region.max.y - region.min.y);
auto w = static_cast<uint32_t>(region.max.x - region.min.x);
auto csize = surface->compositor->image.channelSize;
auto alpha = surface->alpha(surface->compositor->method);
auto sbuffer = image->buf32 + (region.min.y + image->oy) * image->stride + (region.min.x + image->ox);
auto cbuffer = surface->compositor->image.buf8 + (region.min.y * surface->compositor->image.stride + region.min.x) * csize; //compositor buffer
auto buffer = surface->buf32 + (region.min.y * surface->stride) + region.min.x;
for (uint32_t y = 0; y < h; ++y) {
auto dst = buffer;
auto cmp = cbuffer;
auto src = sbuffer;
if (opacity == 255) {
for (uint32_t x = 0; x < w; ++x, ++dst, ++src, cmp += csize) {
auto tmp = ALPHA_BLEND(*src, alpha(cmp));
*dst = INTERPOLATE(surface->blender(tmp, *dst, 255), *dst, A(tmp));
}
} else {
for (uint32_t x = 0; x < w; ++x, ++dst, ++src, cmp += csize) {
auto tmp = ALPHA_BLEND(*src, alpha(cmp));
*dst = INTERPOLATE(surface->blender(tmp, *dst, 255), *dst, MULTIPLY(opacity, A(tmp)));
}
}
buffer += surface->stride;
cbuffer += surface->compositor->image.stride * csize;
sbuffer += image->stride;
}
return true;
}
//Blenders for the following scenarios: [Composition / Non-Composition] * [Opaque / Translucent]
static bool _directImage(SwSurface* surface, const SwImage* image, const SwBBox& region, uint8_t opacity)
{
if (_compositing(surface)) {
if (_matting(surface)) return _rasterDirectMattedImage(surface, image, region, opacity);
else return _rasterDirectMaskedImage(surface, image, region, opacity);
if (_matting(surface)) {
if (_blending(surface)) return _rasterDirectMattedBlendingImage(surface, image, region, opacity);
else return _rasterDirectMattedImage(surface, image, region, opacity);
} else return _rasterDirectMaskedImage(surface, image, region, opacity);
} else if (_blending(surface)) {
return _rasterDirectBlendingImage(surface, image, region, opacity);
} else {