| /* |
| * Copyright (C) 2012 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "platform/graphics/filters/SkiaImageFilterBuilder.h" |
| |
| #include "SkBlurImageFilter.h" |
| #include "SkColorFilterImageFilter.h" |
| #include "SkColorMatrixFilter.h" |
| #include "SkTableColorFilter.h" |
| #include "platform/geometry/IntPoint.h" |
| #include "platform/graphics/BoxReflection.h" |
| #include "platform/graphics/CompositorFilterOperations.h" |
| #include "platform/graphics/filters/FilterEffect.h" |
| #include "platform/graphics/filters/FilterOperations.h" |
| #include "platform/graphics/filters/SourceGraphic.h" |
| #include "platform/graphics/skia/SkiaUtils.h" |
| #include "third_party/skia/include/core/SkPicture.h" |
| #include "third_party/skia/include/core/SkXfermode.h" |
| #include "third_party/skia/include/effects/SkPictureImageFilter.h" |
| #include "third_party/skia/include/effects/SkXfermodeImageFilter.h" |
| |
| namespace blink { |
| namespace SkiaImageFilterBuilder { |
| |
| namespace { |
| |
| void populateSourceGraphicImageFilters(FilterEffect* sourceGraphic, sk_sp<SkImageFilter> input, ColorSpace inputColorSpace) |
| { |
| // Prepopulate SourceGraphic with two image filters: one with a null image |
| // filter, and the other with a colorspace conversion filter. |
| // We don't know what color space the interior nodes will request, so we |
| // have to initialize SourceGraphic with both options. |
| // Since we know SourceGraphic is always PM-valid, we also use these for |
| // the PM-validated options. |
| sk_sp<SkImageFilter> deviceFilter = transformColorSpace(input, inputColorSpace, ColorSpaceDeviceRGB); |
| sk_sp<SkImageFilter> linearFilter = transformColorSpace(input, inputColorSpace, ColorSpaceLinearRGB); |
| sourceGraphic->setImageFilter(ColorSpaceDeviceRGB, false, deviceFilter); |
| sourceGraphic->setImageFilter(ColorSpaceLinearRGB, false, linearFilter); |
| sourceGraphic->setImageFilter(ColorSpaceDeviceRGB, true, deviceFilter); |
| sourceGraphic->setImageFilter(ColorSpaceLinearRGB, true, linearFilter); |
| } |
| |
| } // namespace |
| |
| sk_sp<SkImageFilter> build(FilterEffect* effect, ColorSpace colorSpace, bool destinationRequiresValidPreMultipliedPixels) |
| { |
| if (!effect) |
| return nullptr; |
| |
| bool requiresPMColorValidation = effect->mayProduceInvalidPreMultipliedPixels() && destinationRequiresValidPreMultipliedPixels; |
| |
| if (SkImageFilter* filter = effect->getImageFilter(colorSpace, requiresPMColorValidation)) |
| return sk_ref_sp(filter); |
| |
| // Note that we may still need the color transform even if the filter is null |
| sk_sp<SkImageFilter> origFilter = requiresPMColorValidation ? effect->createImageFilter() : effect->createImageFilterWithoutValidation(); |
| sk_sp<SkImageFilter> filter = transformColorSpace(origFilter, effect->operatingColorSpace(), colorSpace); |
| effect->setImageFilter(colorSpace, requiresPMColorValidation, filter); |
| if (filter.get() != origFilter.get()) |
| effect->setImageFilter(effect->operatingColorSpace(), requiresPMColorValidation, std::move(origFilter)); |
| return filter; |
| } |
| |
| sk_sp<SkImageFilter> transformColorSpace(sk_sp<SkImageFilter> input, ColorSpace srcColorSpace, ColorSpace dstColorSpace) |
| { |
| sk_sp<SkColorFilter> colorFilter = toSkSp(ColorSpaceUtilities::createColorSpaceFilter(srcColorSpace, dstColorSpace)); |
| if (!colorFilter) |
| return input; |
| |
| return SkColorFilterImageFilter::Make(std::move(colorFilter), std::move(input)); |
| } |
| |
| void buildSourceGraphic(FilterEffect* sourceGraphic, sk_sp<SkPicture> picture) |
| { |
| ASSERT(picture); |
| SkRect cullRect = picture->cullRect(); |
| sk_sp<SkImageFilter> filter = SkPictureImageFilter::Make(std::move(picture), cullRect); |
| populateSourceGraphicImageFilters(sourceGraphic, std::move(filter), sourceGraphic->operatingColorSpace()); |
| } |
| |
| void buildFilterOperations(const FilterOperations& operations, CompositorFilterOperations* filters) |
| { |
| ColorSpace currentColorSpace = ColorSpaceDeviceRGB; |
| |
| for (size_t i = 0; i < operations.size(); ++i) { |
| const FilterOperation& op = *operations.at(i); |
| switch (op.type()) { |
| case FilterOperation::REFERENCE: { |
| Filter* referenceFilter = toReferenceFilterOperation(op).getFilter(); |
| if (referenceFilter && referenceFilter->lastEffect()) { |
| populateSourceGraphicImageFilters(referenceFilter->getSourceGraphic(), nullptr, currentColorSpace); |
| |
| FilterEffect* filterEffect = referenceFilter->lastEffect(); |
| currentColorSpace = filterEffect->operatingColorSpace(); |
| filterEffect->determineFilterPrimitiveSubregion(MapRectForward); |
| filters->appendReferenceFilter(SkiaImageFilterBuilder::build(filterEffect, currentColorSpace)); |
| } |
| break; |
| } |
| case FilterOperation::GRAYSCALE: |
| case FilterOperation::SEPIA: |
| case FilterOperation::SATURATE: |
| case FilterOperation::HUE_ROTATE: { |
| float amount = toBasicColorMatrixFilterOperation(op).amount(); |
| switch (op.type()) { |
| case FilterOperation::GRAYSCALE: |
| filters->appendGrayscaleFilter(amount); |
| break; |
| case FilterOperation::SEPIA: |
| filters->appendSepiaFilter(amount); |
| break; |
| case FilterOperation::SATURATE: |
| filters->appendSaturateFilter(amount); |
| break; |
| case FilterOperation::HUE_ROTATE: |
| filters->appendHueRotateFilter(amount); |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| break; |
| } |
| case FilterOperation::INVERT: |
| case FilterOperation::OPACITY: |
| case FilterOperation::BRIGHTNESS: |
| case FilterOperation::CONTRAST: { |
| float amount = toBasicComponentTransferFilterOperation(op).amount(); |
| switch (op.type()) { |
| case FilterOperation::INVERT: |
| filters->appendInvertFilter(amount); |
| break; |
| case FilterOperation::OPACITY: |
| filters->appendOpacityFilter(amount); |
| break; |
| case FilterOperation::BRIGHTNESS: |
| filters->appendBrightnessFilter(amount); |
| break; |
| case FilterOperation::CONTRAST: |
| filters->appendContrastFilter(amount); |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| break; |
| } |
| case FilterOperation::BLUR: { |
| float pixelRadius = toBlurFilterOperation(op).stdDeviation().getFloatValue(); |
| filters->appendBlurFilter(pixelRadius); |
| break; |
| } |
| case FilterOperation::DROP_SHADOW: { |
| const DropShadowFilterOperation& drop = toDropShadowFilterOperation(op); |
| filters->appendDropShadowFilter(drop.location(), drop.stdDeviation(), drop.getColor()); |
| break; |
| } |
| case FilterOperation::BOX_REFLECT: { |
| // TODO(jbroman): Consider explaining box reflect to the compositor, |
| // instead of calling this a "reference filter". |
| const auto& reflection = toBoxReflectFilterOperation(op).reflection(); |
| filters->appendReferenceFilter(buildBoxReflectFilter(reflection, nullptr)); |
| break; |
| } |
| case FilterOperation::NONE: |
| break; |
| } |
| } |
| if (currentColorSpace != ColorSpaceDeviceRGB) { |
| // Transform to device color space at the end of processing, if required |
| sk_sp<SkImageFilter> filter = transformColorSpace(nullptr, currentColorSpace, ColorSpaceDeviceRGB); |
| filters->appendReferenceFilter(std::move(filter)); |
| } |
| } |
| |
| sk_sp<SkImageFilter> buildBoxReflectFilter(const BoxReflection& reflection, sk_sp<SkImageFilter> input) |
| { |
| sk_sp<SkImageFilter> maskedInput; |
| if (SkPicture* maskPicture = reflection.mask()) { |
| // SkXfermodeImageFilter can choose an excessively large size if the |
| // mask is smaller than the filtered contents (due to overflow). |
| // http://skbug.com/5210 |
| SkImageFilter::CropRect cropRect(maskPicture->cullRect()); |
| maskedInput = SkXfermodeImageFilter::Make( |
| SkXfermode::Make(SkXfermode::kSrcIn_Mode), |
| SkPictureImageFilter::Make(sk_ref_sp(maskPicture)), |
| input, &cropRect); |
| } else { |
| maskedInput = input; |
| } |
| sk_sp<SkImageFilter> flipImageFilter = SkImageFilter::MakeMatrixFilter( |
| reflection.reflectionMatrix(), kLow_SkFilterQuality, std::move(maskedInput)); |
| return SkXfermodeImageFilter::Make(nullptr, std::move(flipImageFilter), std::move(input), nullptr); |
| } |
| |
| } // namespace SkiaImageFilterBuilder |
| } // namespace blink |
