static SkColor4f xferColor(const SkColor4f& src, const SkColor4f& dst, SkBlendMode mode) {
switch (mode) {
case SkBlendMode::kSrc:
return src;
case SkBlendMode::kDst:
return dst;
default: {
SkPMColor4f pmS = src.premul();
SkPMColor4f pmD = dst.premul();
return SkBlendMode_Apply(mode, pmS, pmD).unpremul();
}
}
}
bool SkPixmap::erase(const SkColor4f& origColor, const SkIRect* subset) const {
SkPixmap pm;
if (subset) {
if (!this->extractSubset(&pm, *subset)) {
return false;
}
} else {
pm = *this;
}
const SkColor4f color = origColor.pin();
if (kRGBA_F16_SkColorType != pm.colorType()) {
Sk4f c4 = Sk4f::Load(color.vec());
SkColor c;
(c4 * Sk4f(255) + Sk4f(0.5f)).store(&c);
return pm.erase(c);
}
const uint64_t half4 = color.premul().toF16();
for (int y = 0; y < pm.height(); ++y) {
sk_memset64(pm.writable_addr64(0, y), half4, pm.width());
}
return true;
}
SkColor4f SkColorFilter::filterColor4f(const SkColor4f& c, SkColorSpace* colorSpace) const {
SkPMColor4f dst, src = c.premul();
// determined experimentally, seems to cover compose+colormatrix
constexpr size_t kEnoughForCommonFilters = 512;
SkSTArenaAlloc<kEnoughForCommonFilters> alloc;
SkRasterPipeline pipeline(&alloc);
pipeline.append_constant_color(&alloc, src.vec());
SkPaint dummyPaint;
SkStageRec rec = {
&pipeline, &alloc, kRGBA_F32_SkColorType, colorSpace, dummyPaint, nullptr, SkMatrix::I()
};
this->onAppendStages(rec, c.fA == 1);
SkRasterPipeline_MemoryCtx dstPtr = { &dst, 0 };
pipeline.append(SkRasterPipeline::store_f32, &dstPtr);
pipeline.run(0,0, 1,1);
return dst.unpremul();
}
SkColor4f SkColorFilter::filterColor4f(const SkColor4f& c) const {
SkPM4f dst, src = c.premul();
this->filterSpan4f(&src, 1, &dst);
return dst.unpremul();
}