Ejemplo n.º 1
0
static bool choose_blitprocs(const SkPM4f* pm4, const SkImageInfo& info,
                             SkShader::Context::BlitState* state) {
    uint32_t flags = SkXfermode::kSrcIsSingle_D32Flag;
    if (pm4->a() == 1) {
        flags |= SkXfermode::kSrcIsOpaque_D32Flag;
    }
    switch (info.colorType()) {
        case kN32_SkColorType:
            if (info.gammaCloseToSRGB()) {
                flags |= SkXfermode::kDstIsSRGB_D32Flag;
            }
            state->fStorage[0] = (void*)SkXfermode::GetD32Proc(state->fXfer, flags);
            state->fStorage[1] = (void*)pm4;
            state->fBlitBW = D32_BlitBW;
            state->fBlitAA = D32_BlitAA;
            return true;
        case kRGBA_F16_SkColorType:
            state->fStorage[0] = (void*)SkXfermode::GetF16Proc(state->fXfer, flags);
            state->fStorage[1] = (void*)pm4;
            state->fBlitBW = F16_BlitBW;
            state->fBlitAA = F16_BlitAA;
            return true;
        default:
            return false;
    }
}
Ejemplo n.º 2
0
bool SkLinearBitmapPipeline::ClonePipelineForBlitting(
    SkEmbeddableLinearPipeline* pipelineStorage,
    const SkLinearBitmapPipeline& pipeline,
    SkMatrix::TypeMask matrixMask,
    SkShader::TileMode xTileMode,
    SkShader::TileMode yTileMode,
    SkFilterQuality filterQuality,
    const SkPixmap& srcPixmap,
    float finalAlpha,
    SkXfermode::Mode xferMode,
    const SkImageInfo& dstInfo)
{
    if (xferMode == SkXfermode::kSrcOver_Mode
        && srcPixmap.info().alphaType() == kOpaque_SkAlphaType) {
        xferMode = SkXfermode::kSrc_Mode;
    }

    if (matrixMask & ~SkMatrix::kTranslate_Mask ) { return false; }
    if (filterQuality != SkFilterQuality::kNone_SkFilterQuality) { return false; }
    if (finalAlpha != 1.0f) { return false; }
    if (srcPixmap.info().colorType() != kRGBA_8888_SkColorType
        || dstInfo.colorType() != kRGBA_8888_SkColorType) { return false; }

    if (!srcPixmap.info().gammaCloseToSRGB() || !dstInfo.gammaCloseToSRGB()) {
        return false;
    }

    if (xferMode != SkXfermode::kSrc_Mode && xferMode != SkXfermode::kSrcOver_Mode) {
        return false;
    }

    pipelineStorage->init(pipeline, srcPixmap, xferMode, dstInfo);

    return true;
}
static bool supported(const SkImageInfo& info) {
    switch (info.colorType()) {
        case kAlpha_8_SkColorType:  return true;
        case kRGB_565_SkColorType:  return true;
        case kN32_SkColorType:      return info.gammaCloseToSRGB();
        case kRGBA_F16_SkColorType: return true;
        default:                    return false;
    }
}
Ejemplo n.º 4
0
 State32(const SkImageInfo& info, const SkPaint& paint, const SkShader::Context* shaderContext)
     : State4f(info, paint, shaderContext)
 {
     if (is_opaque(paint, shaderContext)) {
         fFlags |= SkXfermode::kSrcIsOpaque_D32Flag;
     }
     if (info.gammaCloseToSRGB()) {
         fFlags |= SkXfermode::kDstIsSRGB_D32Flag;
     }
     fProc1 = SkXfermode::GetD32Proc(fXfer, fFlags | SkXfermode::kSrcIsSingle_D32Flag);
     fProcN = SkXfermode::GetD32Proc(fXfer, fFlags);
 }
Ejemplo n.º 5
0
bool SkJpegEncoderMgr::setParams(const SkImageInfo& srcInfo, const SkJpegEncoder::Options& options)
{
    auto chooseProc8888 = [&]() {
        if (kUnpremul_SkAlphaType != srcInfo.alphaType() ||
            SkJpegEncoder::AlphaOption::kIgnore == options.fAlphaOption)
        {
            return (transform_scanline_proc) nullptr;
        }

        // Note that kRespect mode is only supported with sRGB or linear transfer functions.
        // The legacy code path is incidentally correct when the transfer function is linear.
        const bool isSRGBTransferFn = srcInfo.gammaCloseToSRGB() &&
                (SkTransferFunctionBehavior::kRespect == options.fBlendBehavior);
        if (isSRGBTransferFn) {
            return transform_scanline_to_premul_linear;
        } else {
            return transform_scanline_to_premul_legacy;
        }
    };

    J_COLOR_SPACE jpegColorType = JCS_EXT_RGBA;
    int numComponents = 0;
    switch (srcInfo.colorType()) {
        case kRGBA_8888_SkColorType:
            fProc = chooseProc8888();
            jpegColorType = JCS_EXT_RGBA;
            numComponents = 4;
            break;
        case kBGRA_8888_SkColorType:
            fProc = chooseProc8888();
            jpegColorType = JCS_EXT_BGRA;
            numComponents = 4;
            break;
        case kRGB_565_SkColorType:
            fProc = transform_scanline_565;
            jpegColorType = JCS_RGB;
            numComponents = 3;
            break;
        case kARGB_4444_SkColorType:
            if (SkJpegEncoder::AlphaOption::kBlendOnBlack == options.fAlphaOption) {
                return false;
            }

            fProc = transform_scanline_444;
            jpegColorType = JCS_RGB;
            numComponents = 3;
            break;
        case kGray_8_SkColorType:
            SkASSERT(srcInfo.isOpaque());
            jpegColorType = JCS_GRAYSCALE;
            numComponents = 1;
            break;
        case kRGBA_F16_SkColorType:
            if (!srcInfo.colorSpace() || !srcInfo.colorSpace()->gammaIsLinear() ||
                    SkTransferFunctionBehavior::kRespect != options.fBlendBehavior) {
                return false;
            }

            if (kUnpremul_SkAlphaType != srcInfo.alphaType() ||
                SkJpegEncoder::AlphaOption::kIgnore == options.fAlphaOption)
            {
                fProc = transform_scanline_F16_to_8888;
            } else {
                fProc = transform_scanline_F16_to_premul_8888;
            }
            jpegColorType = JCS_EXT_RGBA;
            numComponents = 4;
            break;
        default:
            return false;
    }

    fCInfo.image_width = srcInfo.width();
    fCInfo.image_height = srcInfo.height();
    fCInfo.in_color_space = jpegColorType;
    fCInfo.input_components = numComponents;
    jpeg_set_defaults(&fCInfo);

    if (kGray_8_SkColorType != srcInfo.colorType()) {
        switch (options.fDownsample) {
            case SkJpegEncoder::Downsample::k420:
                SkASSERT(2 == fCInfo.comp_info[0].h_samp_factor);
                SkASSERT(2 == fCInfo.comp_info[0].v_samp_factor);
                SkASSERT(1 == fCInfo.comp_info[1].h_samp_factor);
                SkASSERT(1 == fCInfo.comp_info[1].v_samp_factor);
                SkASSERT(1 == fCInfo.comp_info[2].h_samp_factor);
                SkASSERT(1 == fCInfo.comp_info[2].v_samp_factor);
                break;
            case SkJpegEncoder::Downsample::k422:
                fCInfo.comp_info[0].h_samp_factor = 2;
                fCInfo.comp_info[0].v_samp_factor = 1;
                fCInfo.comp_info[1].h_samp_factor = 1;
                fCInfo.comp_info[1].v_samp_factor = 1;
                fCInfo.comp_info[2].h_samp_factor = 1;
                fCInfo.comp_info[2].v_samp_factor = 1;
                break;
            case SkJpegEncoder::Downsample::k444:
                fCInfo.comp_info[0].h_samp_factor = 1;
                fCInfo.comp_info[0].v_samp_factor = 1;
                fCInfo.comp_info[1].h_samp_factor = 1;
                fCInfo.comp_info[1].v_samp_factor = 1;
                fCInfo.comp_info[2].h_samp_factor = 1;
                fCInfo.comp_info[2].v_samp_factor = 1;
                break;
        }
    }

    // Tells libjpeg-turbo to compute optimal Huffman coding tables
    // for the image.  This improves compression at the cost of
    // slower encode performance.
    fCInfo.optimize_coding = TRUE;
    return true;
}