Example #1
0
FilterOutsets FilterOperations::outsets() const
{
    FilterOutsets totalOutsets;
    for (size_t i = 0; i < m_operations.size(); ++i) {
        FilterOperation* filterOperation = m_operations.at(i).get();
        switch (filterOperation->type()) {
        case FilterOperation::BLUR: {
            BlurFilterOperation* blurOperation = toBlurFilterOperation(filterOperation);
            float stdDeviation = floatValueForLength(blurOperation->stdDeviation(), 0);
            IntSize outsetSize = outsetSizeForBlur(stdDeviation);
            FilterOutsets outsets(outsetSize.height(), outsetSize.width(), outsetSize.height(), outsetSize.width());
            totalOutsets += outsets;
            break;
        }
        case FilterOperation::DROP_SHADOW: {
            DropShadowFilterOperation* dropShadowOperation = toDropShadowFilterOperation(filterOperation);
            IntSize outsetSize = outsetSizeForBlur(dropShadowOperation->stdDeviation());
            FilterOutsets outsets(
                std::max(0, outsetSize.height() - dropShadowOperation->y()),
                std::max(0, outsetSize.width() + dropShadowOperation->x()),
                std::max(0, outsetSize.height() + dropShadowOperation->y()),
                std::max(0, outsetSize.width() - dropShadowOperation->x())
            );
            totalOutsets += outsets;
            break;
        }
        case FilterOperation::REFERENCE: {
            ReferenceFilterOperation* referenceOperation = toReferenceFilterOperation(filterOperation);
            if (referenceOperation->filter() && referenceOperation->filter()->lastEffect()) {
                FloatRect outsetRect(0, 0, 1, 1);
                outsetRect = referenceOperation->filter()->lastEffect()->mapRectRecursive(outsetRect);
                FilterOutsets outsets(
                    std::max(0.0f, -outsetRect.y()),
                    std::max(0.0f, outsetRect.x() + outsetRect.width() - 1),
                    std::max(0.0f, outsetRect.y() + outsetRect.height() - 1),
                    std::max(0.0f, -outsetRect.x())
                );
                totalOutsets += outsets;
            }
            break;
        }
        default:
            break;
        }
    }
    return totalOutsets;
}
Example #2
0
void FilterOperations::getOutsets(LayoutUnit& top, LayoutUnit& right, LayoutUnit& bottom, LayoutUnit& left) const
{
    top = 0;
    right = 0;
    bottom = 0;
    left = 0;
    for (size_t i = 0; i < m_operations.size(); ++i) {
        FilterOperation* filterOperation = m_operations.at(i).get();
        switch (filterOperation->getOperationType()) {
        case FilterOperation::BLUR: {
            BlurFilterOperation* blurOperation = static_cast<BlurFilterOperation*>(filterOperation);
            float stdDeviation = blurOperation->stdDeviation().calcFloatValue(0);
            IntSize outset = outsetSizeForBlur(stdDeviation);
            top += outset.height();
            right += outset.width();
            bottom += outset.height();
            left += outset.width();
            break;
        }
        case FilterOperation::DROP_SHADOW: {
            DropShadowFilterOperation* dropShadowOperation = static_cast<DropShadowFilterOperation*>(filterOperation);
            IntSize outset = outsetSizeForBlur(dropShadowOperation->stdDeviation());
            top += outset.height() - dropShadowOperation->y();
            right += outset.width() + dropShadowOperation->x();
            bottom += outset.height() + dropShadowOperation->y();
            left += outset.width() - dropShadowOperation->x();
            break;
        }
#if ENABLE(CSS_SHADERS)
        case FilterOperation::CUSTOM: {
            // Need to include the filter margins here.
            break;
        }
#endif
        default:
            break;
        }
    }
}
Example #3
0
void FilterEffectRenderer::build(Document* document, const FilterOperations& operations)
{
#if !ENABLE(CSS_SHADERS) || !ENABLE(WEBGL)
    UNUSED_PARAM(document);
#else
    CustomFilterProgramList cachedCustomFilterPrograms;
#endif

    m_effects.clear();

    RefPtr<FilterEffect> previousEffect;
    for (size_t i = 0; i < operations.operations().size(); ++i) {
        RefPtr<FilterEffect> effect;
        FilterOperation* filterOperation = operations.operations().at(i).get();
        switch (filterOperation->getOperationType()) {
        case FilterOperation::REFERENCE: {
            // FIXME: Not yet implemented.
            // https://bugs.webkit.org/show_bug.cgi?id=72443
            break;
        }
        case FilterOperation::GRAYSCALE: {
            BasicColorMatrixFilterOperation* colorMatrixOperation = static_cast<BasicColorMatrixFilterOperation*>(filterOperation);
            Vector<float> inputParameters;
            double oneMinusAmount = clampTo(1 - colorMatrixOperation->amount(), 0.0, 1.0);

            // See https://dvcs.w3.org/hg/FXTF/raw-file/tip/filters/index.html#grayscaleEquivalent
            // for information on parameters.

            inputParameters.append(narrowPrecisionToFloat(0.2126 + 0.7874 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.7152 - 0.7152 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.0722 - 0.0722 * oneMinusAmount));
            endMatrixRow(inputParameters);

            inputParameters.append(narrowPrecisionToFloat(0.2126 - 0.2126 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.7152 + 0.2848 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.0722 - 0.0722 * oneMinusAmount));
            endMatrixRow(inputParameters);

            inputParameters.append(narrowPrecisionToFloat(0.2126 - 0.2126 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.7152 - 0.7152 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.0722 + 0.9278 * oneMinusAmount));
            endMatrixRow(inputParameters);

            lastMatrixRow(inputParameters);

            effect = FEColorMatrix::create(this, FECOLORMATRIX_TYPE_MATRIX, inputParameters);
            break;
        }
        case FilterOperation::SEPIA: {
            BasicColorMatrixFilterOperation* colorMatrixOperation = static_cast<BasicColorMatrixFilterOperation*>(filterOperation);
            Vector<float> inputParameters;
            double oneMinusAmount = clampTo(1 - colorMatrixOperation->amount(), 0.0, 1.0);

            // See https://dvcs.w3.org/hg/FXTF/raw-file/tip/filters/index.html#sepiaEquivalent
            // for information on parameters.

            inputParameters.append(narrowPrecisionToFloat(0.393 + 0.607 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.769 - 0.769 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.189 - 0.189 * oneMinusAmount));
            endMatrixRow(inputParameters);

            inputParameters.append(narrowPrecisionToFloat(0.349 - 0.349 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.686 + 0.314 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.168 - 0.168 * oneMinusAmount));
            endMatrixRow(inputParameters);

            inputParameters.append(narrowPrecisionToFloat(0.272 - 0.272 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.534 - 0.534 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.131 + 0.869 * oneMinusAmount));
            endMatrixRow(inputParameters);

            lastMatrixRow(inputParameters);

            effect = FEColorMatrix::create(this, FECOLORMATRIX_TYPE_MATRIX, inputParameters);
            break;
        }
        case FilterOperation::SATURATE: {
            BasicColorMatrixFilterOperation* colorMatrixOperation = static_cast<BasicColorMatrixFilterOperation*>(filterOperation);
            Vector<float> inputParameters;
            inputParameters.append(narrowPrecisionToFloat(colorMatrixOperation->amount()));
            effect = FEColorMatrix::create(this, FECOLORMATRIX_TYPE_SATURATE, inputParameters);
            break;
        }
        case FilterOperation::HUE_ROTATE: {
            BasicColorMatrixFilterOperation* colorMatrixOperation = static_cast<BasicColorMatrixFilterOperation*>(filterOperation);
            Vector<float> inputParameters;
            inputParameters.append(narrowPrecisionToFloat(colorMatrixOperation->amount()));
            effect = FEColorMatrix::create(this, FECOLORMATRIX_TYPE_HUEROTATE, inputParameters);
            break;
        }
        case FilterOperation::INVERT: {
            BasicComponentTransferFilterOperation* componentTransferOperation = static_cast<BasicComponentTransferFilterOperation*>(filterOperation);
            ComponentTransferFunction transferFunction;
            transferFunction.type = FECOMPONENTTRANSFER_TYPE_TABLE;
            Vector<float> transferParameters;
            transferParameters.append(narrowPrecisionToFloat(componentTransferOperation->amount()));
            transferParameters.append(narrowPrecisionToFloat(1 - componentTransferOperation->amount()));
            transferFunction.tableValues = transferParameters;

            ComponentTransferFunction nullFunction;
            effect = FEComponentTransfer::create(this, transferFunction, transferFunction, transferFunction, nullFunction);
            break;
        }
        case FilterOperation::OPACITY: {
            BasicComponentTransferFilterOperation* componentTransferOperation = static_cast<BasicComponentTransferFilterOperation*>(filterOperation);
            ComponentTransferFunction transferFunction;
            transferFunction.type = FECOMPONENTTRANSFER_TYPE_TABLE;
            Vector<float> transferParameters;
            transferParameters.append(0);
            transferParameters.append(narrowPrecisionToFloat(componentTransferOperation->amount()));
            transferFunction.tableValues = transferParameters;

            ComponentTransferFunction nullFunction;
            effect = FEComponentTransfer::create(this, nullFunction, nullFunction, nullFunction, transferFunction);
            break;
        }
        case FilterOperation::BRIGHTNESS: {
            BasicComponentTransferFilterOperation* componentTransferOperation = static_cast<BasicComponentTransferFilterOperation*>(filterOperation);
            ComponentTransferFunction transferFunction;
            transferFunction.type = FECOMPONENTTRANSFER_TYPE_LINEAR;
            transferFunction.slope = 1;
            transferFunction.intercept = narrowPrecisionToFloat(componentTransferOperation->amount());

            ComponentTransferFunction nullFunction;
            effect = FEComponentTransfer::create(this, transferFunction, transferFunction, transferFunction, nullFunction);
            break;
        }
        case FilterOperation::CONTRAST: {
            BasicComponentTransferFilterOperation* componentTransferOperation = static_cast<BasicComponentTransferFilterOperation*>(filterOperation);
            ComponentTransferFunction transferFunction;
            transferFunction.type = FECOMPONENTTRANSFER_TYPE_LINEAR;
            float amount = narrowPrecisionToFloat(componentTransferOperation->amount());
            transferFunction.slope = amount;
            transferFunction.intercept = -0.5 * amount + 0.5;
            
            ComponentTransferFunction nullFunction;
            effect = FEComponentTransfer::create(this, transferFunction, transferFunction, transferFunction, nullFunction);
            break;
        }
        case FilterOperation::BLUR: {
            BlurFilterOperation* blurOperation = static_cast<BlurFilterOperation*>(filterOperation);
            float stdDeviation = blurOperation->stdDeviation().calcFloatValue(0);
            effect = FEGaussianBlur::create(this, stdDeviation, stdDeviation);
            break;
        }
        case FilterOperation::DROP_SHADOW: {
            DropShadowFilterOperation* dropShadowOperation = static_cast<DropShadowFilterOperation*>(filterOperation);
            effect = FEDropShadow::create(this, dropShadowOperation->stdDeviation(), dropShadowOperation->stdDeviation(),
                                                dropShadowOperation->x(), dropShadowOperation->y(), dropShadowOperation->color(), 1);
            break;
        }
#if ENABLE(CSS_SHADERS)
        case FilterOperation::CUSTOM: {
#if ENABLE(WEBGL)
            if (!isCSSCustomFilterEnabled(document))
                continue;
            
            CustomFilterOperation* customFilterOperation = static_cast<CustomFilterOperation*>(filterOperation);
            RefPtr<CustomFilterProgram> program = customFilterOperation->program();
            cachedCustomFilterPrograms.append(program);
            program->addClient(this);
            if (program->isLoaded()) {
                effect = FECustomFilter::create(this, document, program, customFilterOperation->parameters(),
                                                customFilterOperation->meshRows(), customFilterOperation->meshColumns(),
                                                customFilterOperation->meshBoxType(), customFilterOperation->meshType());
            }
#endif
            break;
        }
#endif
        default:
            break;
        }

        if (effect) {
            // Unlike SVG, filters applied here should not clip to their primitive subregions.
            effect->setClipsToBounds(false);
            
            if (previousEffect)
                effect->inputEffects().append(previousEffect);
            m_effects.append(effect);
            previousEffect = effect.release();
        }
    }

    // If we didn't make a real filter, create a null-op (FEMerge with one input).
    if (!previousEffect)
        m_effects.append(FEMerge::create(this));

    m_effects.first()->inputEffects().append(m_sourceGraphic);
    setMaxEffectRects(m_sourceDrawingRegion);
    
#if ENABLE(CSS_SHADERS) && ENABLE(WEBGL)
    removeCustomFilterClients();
    m_cachedCustomFilterPrograms.swap(cachedCustomFilterPrograms);
#endif
}
Example #4
0
bool FilterEffectRenderer::build(Document* document, const FilterOperations& operations)
{
#if !ENABLE(CSS_SHADERS) || !USE(3D_GRAPHICS)
    UNUSED_PARAM(document);
#endif

#if ENABLE(CSS_SHADERS)
    m_hasCustomShaderFilter = false;
#endif
    m_hasFilterThatMovesPixels = operations.hasFilterThatMovesPixels();
    if (m_hasFilterThatMovesPixels)
        operations.getOutsets(m_topOutset, m_rightOutset, m_bottomOutset, m_leftOutset);
    
    // Keep the old effects on the stack until we've created the new effects.
    // New FECustomFilters can reuse cached resources from old FECustomFilters.
    FilterEffectList oldEffects;
    m_effects.swap(oldEffects);

    RefPtr<FilterEffect> previousEffect = m_sourceGraphic;
    for (size_t i = 0; i < operations.operations().size(); ++i) {
        RefPtr<FilterEffect> effect;
        FilterOperation* filterOperation = operations.operations().at(i).get();
        switch (filterOperation->getOperationType()) {
        case FilterOperation::REFERENCE: {
            ReferenceFilterOperation* referenceOperation = static_cast<ReferenceFilterOperation*>(filterOperation);
            effect = buildReferenceFilter(document, previousEffect, referenceOperation);
            referenceOperation->setFilterEffect(effect);
            break;
        }
        case FilterOperation::GRAYSCALE: {
            BasicColorMatrixFilterOperation* colorMatrixOperation = static_cast<BasicColorMatrixFilterOperation*>(filterOperation);
            Vector<float> inputParameters;
            double oneMinusAmount = clampTo(1 - colorMatrixOperation->amount(), 0.0, 1.0);

            // See https://dvcs.w3.org/hg/FXTF/raw-file/tip/filters/index.html#grayscaleEquivalent
            // for information on parameters.

            inputParameters.append(narrowPrecisionToFloat(0.2126 + 0.7874 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.7152 - 0.7152 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.0722 - 0.0722 * oneMinusAmount));
            endMatrixRow(inputParameters);

            inputParameters.append(narrowPrecisionToFloat(0.2126 - 0.2126 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.7152 + 0.2848 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.0722 - 0.0722 * oneMinusAmount));
            endMatrixRow(inputParameters);

            inputParameters.append(narrowPrecisionToFloat(0.2126 - 0.2126 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.7152 - 0.7152 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.0722 + 0.9278 * oneMinusAmount));
            endMatrixRow(inputParameters);

            lastMatrixRow(inputParameters);

            effect = FEColorMatrix::create(this, FECOLORMATRIX_TYPE_MATRIX, inputParameters);
            break;
        }
        case FilterOperation::SEPIA: {
            BasicColorMatrixFilterOperation* colorMatrixOperation = static_cast<BasicColorMatrixFilterOperation*>(filterOperation);
            Vector<float> inputParameters;
            double oneMinusAmount = clampTo(1 - colorMatrixOperation->amount(), 0.0, 1.0);

            // See https://dvcs.w3.org/hg/FXTF/raw-file/tip/filters/index.html#sepiaEquivalent
            // for information on parameters.

            inputParameters.append(narrowPrecisionToFloat(0.393 + 0.607 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.769 - 0.769 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.189 - 0.189 * oneMinusAmount));
            endMatrixRow(inputParameters);

            inputParameters.append(narrowPrecisionToFloat(0.349 - 0.349 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.686 + 0.314 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.168 - 0.168 * oneMinusAmount));
            endMatrixRow(inputParameters);

            inputParameters.append(narrowPrecisionToFloat(0.272 - 0.272 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.534 - 0.534 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.131 + 0.869 * oneMinusAmount));
            endMatrixRow(inputParameters);

            lastMatrixRow(inputParameters);

            effect = FEColorMatrix::create(this, FECOLORMATRIX_TYPE_MATRIX, inputParameters);
            break;
        }
        case FilterOperation::SATURATE: {
            BasicColorMatrixFilterOperation* colorMatrixOperation = static_cast<BasicColorMatrixFilterOperation*>(filterOperation);
            Vector<float> inputParameters;
            inputParameters.append(narrowPrecisionToFloat(colorMatrixOperation->amount()));
            effect = FEColorMatrix::create(this, FECOLORMATRIX_TYPE_SATURATE, inputParameters);
            break;
        }
        case FilterOperation::HUE_ROTATE: {
            BasicColorMatrixFilterOperation* colorMatrixOperation = static_cast<BasicColorMatrixFilterOperation*>(filterOperation);
            Vector<float> inputParameters;
            inputParameters.append(narrowPrecisionToFloat(colorMatrixOperation->amount()));
            effect = FEColorMatrix::create(this, FECOLORMATRIX_TYPE_HUEROTATE, inputParameters);
            break;
        }
        case FilterOperation::INVERT: {
            BasicComponentTransferFilterOperation* componentTransferOperation = static_cast<BasicComponentTransferFilterOperation*>(filterOperation);
            ComponentTransferFunction transferFunction;
            transferFunction.type = FECOMPONENTTRANSFER_TYPE_TABLE;
            Vector<float> transferParameters;
            transferParameters.append(narrowPrecisionToFloat(componentTransferOperation->amount()));
            transferParameters.append(narrowPrecisionToFloat(1 - componentTransferOperation->amount()));
            transferFunction.tableValues = transferParameters;

            ComponentTransferFunction nullFunction;
            effect = FEComponentTransfer::create(this, transferFunction, transferFunction, transferFunction, nullFunction);
            break;
        }
        case FilterOperation::OPACITY: {
            BasicComponentTransferFilterOperation* componentTransferOperation = static_cast<BasicComponentTransferFilterOperation*>(filterOperation);
            ComponentTransferFunction transferFunction;
            transferFunction.type = FECOMPONENTTRANSFER_TYPE_TABLE;
            Vector<float> transferParameters;
            transferParameters.append(0);
            transferParameters.append(narrowPrecisionToFloat(componentTransferOperation->amount()));
            transferFunction.tableValues = transferParameters;

            ComponentTransferFunction nullFunction;
            effect = FEComponentTransfer::create(this, nullFunction, nullFunction, nullFunction, transferFunction);
            break;
        }
        case FilterOperation::BRIGHTNESS: {
            BasicComponentTransferFilterOperation* componentTransferOperation = static_cast<BasicComponentTransferFilterOperation*>(filterOperation);
            ComponentTransferFunction transferFunction;
            transferFunction.type = FECOMPONENTTRANSFER_TYPE_LINEAR;
            transferFunction.slope = 1;
            transferFunction.intercept = narrowPrecisionToFloat(componentTransferOperation->amount());

            ComponentTransferFunction nullFunction;
            effect = FEComponentTransfer::create(this, transferFunction, transferFunction, transferFunction, nullFunction);
            break;
        }
        case FilterOperation::CONTRAST: {
            BasicComponentTransferFilterOperation* componentTransferOperation = static_cast<BasicComponentTransferFilterOperation*>(filterOperation);
            ComponentTransferFunction transferFunction;
            transferFunction.type = FECOMPONENTTRANSFER_TYPE_LINEAR;
            float amount = narrowPrecisionToFloat(componentTransferOperation->amount());
            transferFunction.slope = amount;
            transferFunction.intercept = -0.5 * amount + 0.5;
            
            ComponentTransferFunction nullFunction;
            effect = FEComponentTransfer::create(this, transferFunction, transferFunction, transferFunction, nullFunction);
            break;
        }
        case FilterOperation::BLUR: {
            BlurFilterOperation* blurOperation = static_cast<BlurFilterOperation*>(filterOperation);
            float stdDeviation = floatValueForLength(blurOperation->stdDeviation(), 0);
            effect = FEGaussianBlur::create(this, stdDeviation, stdDeviation);
            break;
        }
        case FilterOperation::DROP_SHADOW: {
            DropShadowFilterOperation* dropShadowOperation = static_cast<DropShadowFilterOperation*>(filterOperation);
            effect = FEDropShadow::create(this, dropShadowOperation->stdDeviation(), dropShadowOperation->stdDeviation(),
                                                dropShadowOperation->x(), dropShadowOperation->y(), dropShadowOperation->color(), 1);
            break;
        }
#if ENABLE(CSS_SHADERS) && USE(3D_GRAPHICS)
        case FilterOperation::CUSTOM:
            // CUSTOM operations are always converted to VALIDATED_CUSTOM before getting here.
            // The conversion happens in RenderLayer::computeFilterOperations.
            ASSERT_NOT_REACHED();
            break;
        case FilterOperation::VALIDATED_CUSTOM: {
            ValidatedCustomFilterOperation* customFilterOperation = static_cast<ValidatedCustomFilterOperation*>(filterOperation);
            effect = createCustomFilterEffect(this, document, customFilterOperation);
            if (effect)
                m_hasCustomShaderFilter = true;
            break;
        }
#endif
        default:
            break;
        }

        if (effect) {
            // Unlike SVG, filters applied here should not clip to their primitive subregions.
            effect->setClipsToBounds(false);
            effect->setColorSpace(ColorSpaceDeviceRGB);
            
            if (filterOperation->getOperationType() != FilterOperation::REFERENCE) {
                effect->inputEffects().append(previousEffect);
                m_effects.append(effect);
            }
            previousEffect = effect.release();
        }
    }

    // If we didn't make any effects, tell our caller we are not valid
    if (!m_effects.size())
        return false;

    setMaxEffectRects(m_sourceDrawingRegion);
    
    return true;
}
bool FilterEffectRenderer::build(RenderObject* renderer, const FilterOperations& operations)
{
    m_hasCustomShaderFilter = false;
    m_hasFilterThatMovesPixels = operations.hasFilterThatMovesPixels();

    // Inverse zoom the pre-zoomed CSS shorthand filters, so that they are in the same zoom as the unzoomed reference filters.
    const RenderStyle* style = renderer->style();
    // FIXME: The effects now contain high dpi information, but the software path doesn't (yet) scale its backing.
    //        When the proper dpi dependant backing size is allocated, we should remove deviceScaleFactor(...) here.
    float invZoom = 1.0f / ((style ? style->effectiveZoom() : 1.0f) * deviceScaleFactor(renderer->frame()));

    RefPtr<FilterEffect> previousEffect = m_sourceGraphic;
    for (size_t i = 0; i < operations.operations().size(); ++i) {
        RefPtr<FilterEffect> effect;
        FilterOperation* filterOperation = operations.operations().at(i).get();
        switch (filterOperation->getOperationType()) {
        case FilterOperation::REFERENCE: {
            ReferenceFilterOperation* referenceOperation = static_cast<ReferenceFilterOperation*>(filterOperation);
            effect = ReferenceFilterBuilder::build(this, renderer, previousEffect.get(), referenceOperation);
            break;
        }
        case FilterOperation::GRAYSCALE: {
            BasicColorMatrixFilterOperation* colorMatrixOperation = static_cast<BasicColorMatrixFilterOperation*>(filterOperation);
            Vector<float> inputParameters;
            double oneMinusAmount = clampTo(1 - colorMatrixOperation->amount(), 0.0, 1.0);

            // See https://dvcs.w3.org/hg/FXTF/raw-file/tip/filters/index.html#grayscaleEquivalent
            // for information on parameters.

            inputParameters.append(narrowPrecisionToFloat(0.2126 + 0.7874 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.7152 - 0.7152 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.0722 - 0.0722 * oneMinusAmount));
            endMatrixRow(inputParameters);

            inputParameters.append(narrowPrecisionToFloat(0.2126 - 0.2126 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.7152 + 0.2848 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.0722 - 0.0722 * oneMinusAmount));
            endMatrixRow(inputParameters);

            inputParameters.append(narrowPrecisionToFloat(0.2126 - 0.2126 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.7152 - 0.7152 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.0722 + 0.9278 * oneMinusAmount));
            endMatrixRow(inputParameters);

            lastMatrixRow(inputParameters);

            effect = FEColorMatrix::create(this, FECOLORMATRIX_TYPE_MATRIX, inputParameters);
            break;
        }
        case FilterOperation::SEPIA: {
            BasicColorMatrixFilterOperation* colorMatrixOperation = static_cast<BasicColorMatrixFilterOperation*>(filterOperation);
            Vector<float> inputParameters;
            double oneMinusAmount = clampTo(1 - colorMatrixOperation->amount(), 0.0, 1.0);

            // See https://dvcs.w3.org/hg/FXTF/raw-file/tip/filters/index.html#sepiaEquivalent
            // for information on parameters.

            inputParameters.append(narrowPrecisionToFloat(0.393 + 0.607 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.769 - 0.769 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.189 - 0.189 * oneMinusAmount));
            endMatrixRow(inputParameters);

            inputParameters.append(narrowPrecisionToFloat(0.349 - 0.349 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.686 + 0.314 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.168 - 0.168 * oneMinusAmount));
            endMatrixRow(inputParameters);

            inputParameters.append(narrowPrecisionToFloat(0.272 - 0.272 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.534 - 0.534 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.131 + 0.869 * oneMinusAmount));
            endMatrixRow(inputParameters);

            lastMatrixRow(inputParameters);

            effect = FEColorMatrix::create(this, FECOLORMATRIX_TYPE_MATRIX, inputParameters);
            break;
        }
        case FilterOperation::SATURATE: {
            BasicColorMatrixFilterOperation* colorMatrixOperation = static_cast<BasicColorMatrixFilterOperation*>(filterOperation);
            Vector<float> inputParameters;
            inputParameters.append(narrowPrecisionToFloat(colorMatrixOperation->amount()));
            effect = FEColorMatrix::create(this, FECOLORMATRIX_TYPE_SATURATE, inputParameters);
            break;
        }
        case FilterOperation::HUE_ROTATE: {
            BasicColorMatrixFilterOperation* colorMatrixOperation = static_cast<BasicColorMatrixFilterOperation*>(filterOperation);
            Vector<float> inputParameters;
            inputParameters.append(narrowPrecisionToFloat(colorMatrixOperation->amount()));
            effect = FEColorMatrix::create(this, FECOLORMATRIX_TYPE_HUEROTATE, inputParameters);
            break;
        }
        case FilterOperation::INVERT: {
            BasicComponentTransferFilterOperation* componentTransferOperation = static_cast<BasicComponentTransferFilterOperation*>(filterOperation);
            ComponentTransferFunction transferFunction;
            transferFunction.type = FECOMPONENTTRANSFER_TYPE_TABLE;
            Vector<float> transferParameters;
            transferParameters.append(narrowPrecisionToFloat(componentTransferOperation->amount()));
            transferParameters.append(narrowPrecisionToFloat(1 - componentTransferOperation->amount()));
            transferFunction.tableValues = transferParameters;

            ComponentTransferFunction nullFunction;
            effect = FEComponentTransfer::create(this, transferFunction, transferFunction, transferFunction, nullFunction);
            break;
        }
        case FilterOperation::OPACITY: {
            BasicComponentTransferFilterOperation* componentTransferOperation = static_cast<BasicComponentTransferFilterOperation*>(filterOperation);
            ComponentTransferFunction transferFunction;
            transferFunction.type = FECOMPONENTTRANSFER_TYPE_TABLE;
            Vector<float> transferParameters;
            transferParameters.append(0);
            transferParameters.append(narrowPrecisionToFloat(componentTransferOperation->amount()));
            transferFunction.tableValues = transferParameters;

            ComponentTransferFunction nullFunction;
            effect = FEComponentTransfer::create(this, nullFunction, nullFunction, nullFunction, transferFunction);
            break;
        }
        case FilterOperation::BRIGHTNESS: {
            BasicComponentTransferFilterOperation* componentTransferOperation = static_cast<BasicComponentTransferFilterOperation*>(filterOperation);
            ComponentTransferFunction transferFunction;
            transferFunction.type = FECOMPONENTTRANSFER_TYPE_LINEAR;
            transferFunction.slope = narrowPrecisionToFloat(componentTransferOperation->amount());
            transferFunction.intercept = 0;

            ComponentTransferFunction nullFunction;
            effect = FEComponentTransfer::create(this, transferFunction, transferFunction, transferFunction, nullFunction);
            break;
        }
        case FilterOperation::CONTRAST: {
            BasicComponentTransferFilterOperation* componentTransferOperation = static_cast<BasicComponentTransferFilterOperation*>(filterOperation);
            ComponentTransferFunction transferFunction;
            transferFunction.type = FECOMPONENTTRANSFER_TYPE_LINEAR;
            float amount = narrowPrecisionToFloat(componentTransferOperation->amount());
            transferFunction.slope = amount;
            transferFunction.intercept = -0.5 * amount + 0.5;

            ComponentTransferFunction nullFunction;
            effect = FEComponentTransfer::create(this, transferFunction, transferFunction, transferFunction, nullFunction);
            break;
        }
        case FilterOperation::BLUR: {
            BlurFilterOperation* blurOperation = static_cast<BlurFilterOperation*>(filterOperation);
            float stdDeviation = floatValueForLength(blurOperation->stdDeviation(), 0) * invZoom;
            effect = FEGaussianBlur::create(this, stdDeviation, stdDeviation);
            break;
        }
        case FilterOperation::DROP_SHADOW: {
            DropShadowFilterOperation* dropShadowOperation = static_cast<DropShadowFilterOperation*>(filterOperation);
            float stdDeviation = dropShadowOperation->stdDeviation() * invZoom;
            float x = dropShadowOperation->x() * invZoom;
            float y = dropShadowOperation->y() * invZoom;
            effect = FEDropShadow::create(this, stdDeviation, stdDeviation, x, y, dropShadowOperation->color(), 1);
            break;
        }
        case FilterOperation::CUSTOM:
            // CUSTOM operations are always converted to VALIDATED_CUSTOM before getting here.
            // The conversion happens in RenderLayer::computeFilterOperations.
            ASSERT_NOT_REACHED();
            break;
        case FilterOperation::VALIDATED_CUSTOM: {
            ValidatedCustomFilterOperation* customFilterOperation = static_cast<ValidatedCustomFilterOperation*>(filterOperation);
            Document* document = renderer ? &renderer->document() : 0;
            effect = createCustomFilterEffect(this, document, customFilterOperation);
            if (effect)
                m_hasCustomShaderFilter = true;
            break;
        }
        default:
            break;
        }

        if (effect) {
            if (filterOperation->getOperationType() != FilterOperation::REFERENCE) {
                // Unlike SVG, filters applied here should not clip to their primitive subregions.
                effect->setClipsToBounds(false);
                effect->setOperatingColorSpace(ColorSpaceDeviceRGB);
                effect->inputEffects().append(previousEffect);
            }
            previousEffect = effect.release();
        }
    }

    // We need to keep the old effects alive until this point, so that filters like FECustomFilter
    // can share cached resources across frames.
    m_lastEffect = previousEffect;

    // If we didn't make any effects, tell our caller we are not valid
    if (!m_lastEffect.get())
        return false;

    return true;
}
Example #6
0
bool FilterEffectRenderer::build(RenderElement* renderer, const FilterOperations& operations, FilterConsumer consumer)
{
    m_hasFilterThatMovesPixels = operations.hasFilterThatMovesPixels();
    if (m_hasFilterThatMovesPixels)
        m_outsets = operations.outsets();

    m_effects.clear();

    RefPtr<FilterEffect> previousEffect = m_sourceGraphic;
    for (size_t i = 0; i < operations.operations().size(); ++i) {
        RefPtr<FilterEffect> effect;
        FilterOperation* filterOperation = operations.operations().at(i).get();
        switch (filterOperation->type()) {
        case FilterOperation::REFERENCE: {
            ReferenceFilterOperation* referenceOperation = toReferenceFilterOperation(filterOperation);
            effect = buildReferenceFilter(renderer, previousEffect, referenceOperation);
            referenceOperation->setFilterEffect(effect);
            break;
        }
        case FilterOperation::GRAYSCALE: {
            BasicColorMatrixFilterOperation* colorMatrixOperation = toBasicColorMatrixFilterOperation(filterOperation);
            Vector<float> inputParameters;
            double oneMinusAmount = clampTo(1 - colorMatrixOperation->amount(), 0.0, 1.0);

            // See https://dvcs.w3.org/hg/FXTF/raw-file/tip/filters/index.html#grayscaleEquivalent
            // for information on parameters.

            inputParameters.append(narrowPrecisionToFloat(0.2126 + 0.7874 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.7152 - 0.7152 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.0722 - 0.0722 * oneMinusAmount));
            endMatrixRow(inputParameters);

            inputParameters.append(narrowPrecisionToFloat(0.2126 - 0.2126 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.7152 + 0.2848 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.0722 - 0.0722 * oneMinusAmount));
            endMatrixRow(inputParameters);

            inputParameters.append(narrowPrecisionToFloat(0.2126 - 0.2126 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.7152 - 0.7152 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.0722 + 0.9278 * oneMinusAmount));
            endMatrixRow(inputParameters);

            lastMatrixRow(inputParameters);

            effect = FEColorMatrix::create(this, FECOLORMATRIX_TYPE_MATRIX, inputParameters);
            break;
        }
        case FilterOperation::SEPIA: {
            BasicColorMatrixFilterOperation* colorMatrixOperation = toBasicColorMatrixFilterOperation(filterOperation);
            Vector<float> inputParameters;
            double oneMinusAmount = clampTo(1 - colorMatrixOperation->amount(), 0.0, 1.0);

            // See https://dvcs.w3.org/hg/FXTF/raw-file/tip/filters/index.html#sepiaEquivalent
            // for information on parameters.

            inputParameters.append(narrowPrecisionToFloat(0.393 + 0.607 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.769 - 0.769 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.189 - 0.189 * oneMinusAmount));
            endMatrixRow(inputParameters);

            inputParameters.append(narrowPrecisionToFloat(0.349 - 0.349 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.686 + 0.314 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.168 - 0.168 * oneMinusAmount));
            endMatrixRow(inputParameters);

            inputParameters.append(narrowPrecisionToFloat(0.272 - 0.272 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.534 - 0.534 * oneMinusAmount));
            inputParameters.append(narrowPrecisionToFloat(0.131 + 0.869 * oneMinusAmount));
            endMatrixRow(inputParameters);

            lastMatrixRow(inputParameters);

            effect = FEColorMatrix::create(this, FECOLORMATRIX_TYPE_MATRIX, inputParameters);
            break;
        }
        case FilterOperation::SATURATE: {
            BasicColorMatrixFilterOperation* colorMatrixOperation = toBasicColorMatrixFilterOperation(filterOperation);
            Vector<float> inputParameters;
            inputParameters.append(narrowPrecisionToFloat(colorMatrixOperation->amount()));
            effect = FEColorMatrix::create(this, FECOLORMATRIX_TYPE_SATURATE, inputParameters);
            break;
        }
        case FilterOperation::HUE_ROTATE: {
            BasicColorMatrixFilterOperation* colorMatrixOperation = toBasicColorMatrixFilterOperation(filterOperation);
            Vector<float> inputParameters;
            inputParameters.append(narrowPrecisionToFloat(colorMatrixOperation->amount()));
            effect = FEColorMatrix::create(this, FECOLORMATRIX_TYPE_HUEROTATE, inputParameters);
            break;
        }
        case FilterOperation::INVERT: {
            BasicComponentTransferFilterOperation* componentTransferOperation = toBasicComponentTransferFilterOperation(filterOperation);
            ComponentTransferFunction transferFunction;
            transferFunction.type = FECOMPONENTTRANSFER_TYPE_TABLE;
            Vector<float> transferParameters;
            transferParameters.append(narrowPrecisionToFloat(componentTransferOperation->amount()));
            transferParameters.append(narrowPrecisionToFloat(1 - componentTransferOperation->amount()));
            transferFunction.tableValues = transferParameters;

            ComponentTransferFunction nullFunction;
            effect = FEComponentTransfer::create(this, transferFunction, transferFunction, transferFunction, nullFunction);
            break;
        }
        case FilterOperation::OPACITY: {
            BasicComponentTransferFilterOperation* componentTransferOperation = toBasicComponentTransferFilterOperation(filterOperation);
            ComponentTransferFunction transferFunction;
            transferFunction.type = FECOMPONENTTRANSFER_TYPE_TABLE;
            Vector<float> transferParameters;
            transferParameters.append(0);
            transferParameters.append(narrowPrecisionToFloat(componentTransferOperation->amount()));
            transferFunction.tableValues = transferParameters;

            ComponentTransferFunction nullFunction;
            effect = FEComponentTransfer::create(this, nullFunction, nullFunction, nullFunction, transferFunction);
            break;
        }
        case FilterOperation::BRIGHTNESS: {
            BasicComponentTransferFilterOperation* componentTransferOperation = toBasicComponentTransferFilterOperation(filterOperation);
            ComponentTransferFunction transferFunction;
            transferFunction.type = FECOMPONENTTRANSFER_TYPE_LINEAR;
            transferFunction.slope = narrowPrecisionToFloat(componentTransferOperation->amount());
            transferFunction.intercept = 0;

            ComponentTransferFunction nullFunction;
            effect = FEComponentTransfer::create(this, transferFunction, transferFunction, transferFunction, nullFunction);
            break;
        }
        case FilterOperation::CONTRAST: {
            BasicComponentTransferFilterOperation* componentTransferOperation = toBasicComponentTransferFilterOperation(filterOperation);
            ComponentTransferFunction transferFunction;
            transferFunction.type = FECOMPONENTTRANSFER_TYPE_LINEAR;
            float amount = narrowPrecisionToFloat(componentTransferOperation->amount());
            transferFunction.slope = amount;
            transferFunction.intercept = -0.5 * amount + 0.5;
            
            ComponentTransferFunction nullFunction;
            effect = FEComponentTransfer::create(this, transferFunction, transferFunction, transferFunction, nullFunction);
            break;
        }
        case FilterOperation::BLUR: {
            BlurFilterOperation* blurOperation = toBlurFilterOperation(filterOperation);
            float stdDeviation = floatValueForLength(blurOperation->stdDeviation(), 0);
            effect = FEGaussianBlur::create(this, stdDeviation, stdDeviation, consumer == FilterProperty ? EDGEMODE_NONE : EDGEMODE_DUPLICATE);
            break;
        }
        case FilterOperation::DROP_SHADOW: {
            DropShadowFilterOperation* dropShadowOperation = toDropShadowFilterOperation(filterOperation);
            effect = FEDropShadow::create(this, dropShadowOperation->stdDeviation(), dropShadowOperation->stdDeviation(),
                                                dropShadowOperation->x(), dropShadowOperation->y(), dropShadowOperation->color(), 1);
            break;
        }
        default:
            break;
        }

        if (effect) {
            // Unlike SVG Filters and CSSFilterImages, filter functions on the filter
            // property applied here should not clip to their primitive subregions.
            effect->setClipsToBounds(consumer == FilterFunction);
            effect->setOperatingColorSpace(ColorSpaceDeviceRGB);
            
            if (filterOperation->type() != FilterOperation::REFERENCE) {
                effect->inputEffects().append(previousEffect);
                m_effects.append(effect);
            }
            previousEffect = effect.release();
        }
    }

    // If we didn't make any effects, tell our caller we are not valid
    if (!m_effects.size())
        return false;

    setMaxEffectRects(m_sourceDrawingRegion);
    
    return true;
}