| /* |
| * 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 "config.h" |
| |
| #include "platform/graphics/filters/SkiaImageFilterBuilder.h" |
| |
| #include "SkBlurImageFilter.h" |
| #include "SkColorFilterImageFilter.h" |
| #include "SkColorMatrixFilter.h" |
| #include "SkDropShadowImageFilter.h" |
| #include "SkTableColorFilter.h" |
| #include "platform/graphics/ImageBuffer.h" |
| #include "platform/graphics/filters/FilterEffect.h" |
| #include "platform/graphics/filters/FilterOperations.h" |
| #include "platform/graphics/filters/SourceGraphic.h" |
| #include "public/platform/WebPoint.h" |
| |
| namespace { |
| |
| PassRefPtr<SkImageFilter> createMatrixImageFilter(SkScalar matrix[20], SkImageFilter* input) |
| { |
| RefPtr<SkColorFilter> colorFilter(adoptRef(new SkColorMatrixFilter(matrix))); |
| return adoptRef(SkColorFilterImageFilter::Create(colorFilter.get(), input)); |
| } |
| |
| }; |
| |
| namespace WebCore { |
| |
| SkiaImageFilterBuilder::SkiaImageFilterBuilder() |
| { |
| } |
| |
| SkiaImageFilterBuilder::~SkiaImageFilterBuilder() |
| { |
| } |
| |
| PassRefPtr<SkImageFilter> SkiaImageFilterBuilder::build(FilterEffect* effect, ColorSpace colorSpace) |
| { |
| if (!effect) |
| return 0; |
| |
| FilterColorSpacePair key(effect, colorSpace); |
| FilterBuilderHashMap::iterator it = m_map.find(key); |
| if (it != m_map.end()) { |
| return it->value; |
| } else { |
| // Note that we may still need the color transform even if the filter is null |
| RefPtr<SkImageFilter> origFilter = effect->createImageFilter(this); |
| RefPtr<SkImageFilter> filter = transformColorSpace(origFilter.get(), effect->operatingColorSpace(), colorSpace); |
| m_map.set(key, filter); |
| return filter.release(); |
| } |
| } |
| |
| PassRefPtr<SkImageFilter> SkiaImageFilterBuilder::transformColorSpace( |
| SkImageFilter* input, ColorSpace srcColorSpace, ColorSpace dstColorSpace) { |
| |
| RefPtr<SkColorFilter> colorFilter = ImageBuffer::createColorSpaceFilter(srcColorSpace, dstColorSpace); |
| if (!colorFilter) |
| return input; |
| |
| return adoptRef(SkColorFilterImageFilter::Create(colorFilter.get(), input)); |
| } |
| |
| bool SkiaImageFilterBuilder::buildFilterOperations(const FilterOperations& operations, blink::WebFilterOperations* filters) |
| { |
| if (!filters) |
| return false; |
| |
| ColorSpace currentColorSpace = ColorSpaceDeviceRGB; |
| |
| RefPtr<SkImageFilter> noopFilter; |
| SkScalar matrix[20]; |
| memset(matrix, 0, 20 * sizeof(SkScalar)); |
| matrix[0] = matrix[6] = matrix[12] = matrix[18] = 1.f; |
| noopFilter = createMatrixImageFilter(matrix, 0); |
| |
| for (size_t i = 0; i < operations.size(); ++i) { |
| const FilterOperation& op = *operations.at(i); |
| switch (op.type()) { |
| case FilterOperation::REFERENCE: { |
| RefPtr<SkImageFilter> filter; |
| ReferenceFilter* referenceFilter = toReferenceFilterOperation(op).filter(); |
| if (referenceFilter && referenceFilter->lastEffect()) { |
| FilterEffect* filterEffect = referenceFilter->lastEffect(); |
| // Link SourceGraphic to a noop filter that serves as a placholder for |
| // the previous filter in the chain. We don't know what color space the |
| // interior nodes will request, so we have to populate the map with both |
| // options. (Only one of these will actually have a color transform on it.) |
| FilterColorSpacePair deviceKey(referenceFilter->sourceGraphic(), ColorSpaceDeviceRGB); |
| FilterColorSpacePair linearKey(referenceFilter->sourceGraphic(), ColorSpaceLinearRGB); |
| m_map.set(deviceKey, transformColorSpace(noopFilter.get(), currentColorSpace, ColorSpaceDeviceRGB)); |
| m_map.set(linearKey, transformColorSpace(noopFilter.get(), currentColorSpace, ColorSpaceLinearRGB)); |
| |
| currentColorSpace = filterEffect->operatingColorSpace(); |
| filter = SkiaImageFilterBuilder::build(filterEffect, currentColorSpace); |
| // We might have no reference to the SourceGraphic's Skia filter now, so make |
| // sure we don't keep it in the map anymore. |
| m_map.remove(deviceKey); |
| m_map.remove(linearKey); |
| filters->appendReferenceFilter(filter.get()); |
| } |
| 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(blink::WebPoint(drop.x(), drop.y()), drop.stdDeviation(), drop.color().rgb()); |
| break; |
| } |
| case FilterOperation::VALIDATED_CUSTOM: |
| case FilterOperation::CUSTOM: |
| return false; // Not supported. |
| case FilterOperation::NONE: |
| break; |
| } |
| } |
| if (currentColorSpace != ColorSpaceDeviceRGB) { |
| // Transform to device color space at the end of processing, if required |
| RefPtr<SkImageFilter> filter; |
| filter = transformColorSpace(noopFilter.get(), currentColorSpace, ColorSpaceDeviceRGB); |
| if (filter != noopFilter) |
| filters->appendReferenceFilter(filter.get()); |
| } |
| return true; |
| } |
| |
| }; |