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();
        }
    }
}
Esempio n. 2
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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;
}
Esempio n. 3
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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();
}
Esempio n. 4
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SkColor4f SkColorFilter::filterColor4f(const SkColor4f& c) const {
    SkPM4f dst, src = c.premul();
    this->filterSpan4f(&src, 1, &dst);
    return dst.unpremul();
}