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| 1 /* | |
| 2 * Copyright (C) 2012 Google Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * | |
| 8 * 1. Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 * notice, this list of conditions and the following disclaimer in the | |
| 12 * documentation and/or other materials provided with the distribution. | |
| 13 * | |
| 14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY | |
| 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
| 16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
| 17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY | |
| 18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| 19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
| 21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
| 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 */ | |
| 25 #include "config.h" | |
| 26 | |
| 27 #include "core/platform/graphics/filters/SkiaImageFilterBuilder.h" | |
| 28 | |
| 29 #include "SkBlurImageFilter.h" | |
| 30 #include "SkColorFilterImageFilter.h" | |
| 31 #include "SkColorMatrixFilter.h" | |
| 32 #include "SkDropShadowImageFilter.h" | |
| 33 #include "SkTableColorFilter.h" | |
| 34 #include "core/platform/graphics/ImageBuffer.h" | |
| 35 #include "core/platform/graphics/filters/FilterEffect.h" | |
| 36 #include "core/platform/graphics/filters/FilterOperations.h" | |
| 37 #include "core/platform/graphics/filters/SourceGraphic.h" | |
| 38 #include "public/platform/WebPoint.h" | |
| 39 | |
| 40 namespace { | |
| 41 | |
| 42 PassRefPtr<SkImageFilter> createMatrixImageFilter(SkScalar matrix[20], SkImageFi
lter* input) | |
| 43 { | |
| 44 RefPtr<SkColorFilter> colorFilter(adoptRef(new SkColorMatrixFilter(matrix)))
; | |
| 45 return adoptRef(SkColorFilterImageFilter::Create(colorFilter.get(), input)); | |
| 46 } | |
| 47 | |
| 48 }; | |
| 49 | |
| 50 namespace WebCore { | |
| 51 | |
| 52 SkiaImageFilterBuilder::SkiaImageFilterBuilder() | |
| 53 { | |
| 54 } | |
| 55 | |
| 56 SkiaImageFilterBuilder::~SkiaImageFilterBuilder() | |
| 57 { | |
| 58 } | |
| 59 | |
| 60 PassRefPtr<SkImageFilter> SkiaImageFilterBuilder::build(FilterEffect* effect, Co
lorSpace colorSpace) | |
| 61 { | |
| 62 if (!effect) | |
| 63 return 0; | |
| 64 | |
| 65 FilterColorSpacePair key(effect, colorSpace); | |
| 66 FilterBuilderHashMap::iterator it = m_map.find(key); | |
| 67 if (it != m_map.end()) { | |
| 68 return it->value; | |
| 69 } else { | |
| 70 // Note that we may still need the color transform even if the filter is
null | |
| 71 RefPtr<SkImageFilter> origFilter = effect->createImageFilter(this); | |
| 72 RefPtr<SkImageFilter> filter = transformColorSpace(origFilter.get(), eff
ect->operatingColorSpace(), colorSpace); | |
| 73 m_map.set(key, filter); | |
| 74 return filter.release(); | |
| 75 } | |
| 76 } | |
| 77 | |
| 78 PassRefPtr<SkImageFilter> SkiaImageFilterBuilder::transformColorSpace( | |
| 79 SkImageFilter* input, ColorSpace srcColorSpace, ColorSpace dstColorSpace) { | |
| 80 | |
| 81 RefPtr<SkColorFilter> colorFilter = ImageBuffer::createColorSpaceFilter(srcC
olorSpace, dstColorSpace); | |
| 82 if (!colorFilter) | |
| 83 return input; | |
| 84 | |
| 85 return adoptRef(SkColorFilterImageFilter::Create(colorFilter.get(), input)); | |
| 86 } | |
| 87 | |
| 88 bool SkiaImageFilterBuilder::buildFilterOperations(const FilterOperations& opera
tions, blink::WebFilterOperations* filters) | |
| 89 { | |
| 90 if (!filters) | |
| 91 return false; | |
| 92 | |
| 93 ColorSpace currentColorSpace = ColorSpaceDeviceRGB; | |
| 94 | |
| 95 RefPtr<SkImageFilter> noopFilter; | |
| 96 SkScalar matrix[20]; | |
| 97 memset(matrix, 0, 20 * sizeof(SkScalar)); | |
| 98 matrix[0] = matrix[6] = matrix[12] = matrix[18] = 1.f; | |
| 99 noopFilter = createMatrixImageFilter(matrix, 0); | |
| 100 | |
| 101 for (size_t i = 0; i < operations.size(); ++i) { | |
| 102 const FilterOperation& op = *operations.at(i); | |
| 103 switch (op.type()) { | |
| 104 case FilterOperation::REFERENCE: { | |
| 105 RefPtr<SkImageFilter> filter; | |
| 106 ReferenceFilter* referenceFilter = toReferenceFilterOperation(op).fi
lter(); | |
| 107 if (referenceFilter && referenceFilter->lastEffect()) { | |
| 108 FilterEffect* filterEffect = referenceFilter->lastEffect(); | |
| 109 // Link SourceGraphic to a noop filter that serves as a plachold
er for | |
| 110 // the previous filter in the chain. We don't know what color sp
ace the | |
| 111 // interior nodes will request, so we have to populate the map w
ith both | |
| 112 // options. (Only one of these will actually have a color transf
orm on it.) | |
| 113 FilterColorSpacePair deviceKey(referenceFilter->sourceGraphic(),
ColorSpaceDeviceRGB); | |
| 114 FilterColorSpacePair linearKey(referenceFilter->sourceGraphic(),
ColorSpaceLinearRGB); | |
| 115 m_map.set(deviceKey, transformColorSpace(noopFilter.get(), curre
ntColorSpace, ColorSpaceDeviceRGB)); | |
| 116 m_map.set(linearKey, transformColorSpace(noopFilter.get(), curre
ntColorSpace, ColorSpaceLinearRGB)); | |
| 117 | |
| 118 currentColorSpace = filterEffect->operatingColorSpace(); | |
| 119 filter = SkiaImageFilterBuilder::build(filterEffect, currentColo
rSpace); | |
| 120 // We might have no reference to the SourceGraphic's Skia filter
now, so make | |
| 121 // sure we don't keep it in the map anymore. | |
| 122 m_map.remove(deviceKey); | |
| 123 m_map.remove(linearKey); | |
| 124 filters->appendReferenceFilter(filter.get()); | |
| 125 } | |
| 126 break; | |
| 127 } | |
| 128 case FilterOperation::GRAYSCALE: | |
| 129 case FilterOperation::SEPIA: | |
| 130 case FilterOperation::SATURATE: | |
| 131 case FilterOperation::HUE_ROTATE: { | |
| 132 float amount = toBasicColorMatrixFilterOperation(op).amount(); | |
| 133 switch (op.type()) { | |
| 134 case FilterOperation::GRAYSCALE: | |
| 135 filters->appendGrayscaleFilter(amount); | |
| 136 break; | |
| 137 case FilterOperation::SEPIA: | |
| 138 filters->appendSepiaFilter(amount); | |
| 139 break; | |
| 140 case FilterOperation::SATURATE: | |
| 141 filters->appendSaturateFilter(amount); | |
| 142 break; | |
| 143 case FilterOperation::HUE_ROTATE: | |
| 144 filters->appendHueRotateFilter(amount); | |
| 145 break; | |
| 146 default: | |
| 147 ASSERT_NOT_REACHED(); | |
| 148 } | |
| 149 break; | |
| 150 } | |
| 151 case FilterOperation::INVERT: | |
| 152 case FilterOperation::OPACITY: | |
| 153 case FilterOperation::BRIGHTNESS: | |
| 154 case FilterOperation::CONTRAST: { | |
| 155 float amount = toBasicComponentTransferFilterOperation(op).amount(); | |
| 156 switch (op.type()) { | |
| 157 case FilterOperation::INVERT: | |
| 158 filters->appendInvertFilter(amount); | |
| 159 break; | |
| 160 case FilterOperation::OPACITY: | |
| 161 filters->appendOpacityFilter(amount); | |
| 162 break; | |
| 163 case FilterOperation::BRIGHTNESS: | |
| 164 filters->appendBrightnessFilter(amount); | |
| 165 break; | |
| 166 case FilterOperation::CONTRAST: | |
| 167 filters->appendContrastFilter(amount); | |
| 168 break; | |
| 169 default: | |
| 170 ASSERT_NOT_REACHED(); | |
| 171 } | |
| 172 break; | |
| 173 } | |
| 174 case FilterOperation::BLUR: { | |
| 175 float pixelRadius = toBlurFilterOperation(op).stdDeviation().getFloa
tValue(); | |
| 176 filters->appendBlurFilter(pixelRadius); | |
| 177 break; | |
| 178 } | |
| 179 case FilterOperation::DROP_SHADOW: { | |
| 180 const DropShadowFilterOperation& drop = toDropShadowFilterOperation(
op); | |
| 181 filters->appendDropShadowFilter(blink::WebPoint(drop.x(), drop.y()),
drop.stdDeviation(), drop.color().rgb()); | |
| 182 break; | |
| 183 } | |
| 184 case FilterOperation::VALIDATED_CUSTOM: | |
| 185 case FilterOperation::CUSTOM: | |
| 186 return false; // Not supported. | |
| 187 case FilterOperation::NONE: | |
| 188 break; | |
| 189 } | |
| 190 } | |
| 191 if (currentColorSpace != ColorSpaceDeviceRGB) { | |
| 192 // Transform to device color space at the end of processing, if required | |
| 193 RefPtr<SkImageFilter> filter; | |
| 194 filter = transformColorSpace(noopFilter.get(), currentColorSpace, ColorS
paceDeviceRGB); | |
| 195 if (filter != noopFilter) | |
| 196 filters->appendReferenceFilter(filter.get()); | |
| 197 } | |
| 198 return true; | |
| 199 } | |
| 200 | |
| 201 }; | |
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Chromium Code Reviews
Issue 99103006:
Moving GraphicsContext and dependencies from core to platform. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk