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1 /* | 1 /* |
2 * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org> | 2 * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org> |
3 * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org> | 3 * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org> |
4 * Copyright (C) 2005 Eric Seidel <eric@webkit.org> | 4 * Copyright (C) 2005 Eric Seidel <eric@webkit.org> |
5 * Copyright (C) 2009 Dirk Schulze <krit@webkit.org> | 5 * Copyright (C) 2009 Dirk Schulze <krit@webkit.org> |
6 * Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies) | 6 * Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies) |
7 * Copyright (C) 2013 Google Inc. All rights reserved. | 7 * Copyright (C) 2013 Google Inc. All rights reserved. |
8 * | 8 * |
9 * This library is free software; you can redistribute it and/or | 9 * This library is free software; you can redistribute it and/or |
10 * modify it under the terms of the GNU Library General Public | 10 * modify it under the terms of the GNU Library General Public |
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24 | 24 |
25 #include "config.h" | 25 #include "config.h" |
26 #include "platform/graphics/filters/FEBlend.h" | 26 #include "platform/graphics/filters/FEBlend.h" |
27 | 27 |
28 #include "SkBitmapSource.h" | 28 #include "SkBitmapSource.h" |
29 #include "SkXfermodeImageFilter.h" | 29 #include "SkXfermodeImageFilter.h" |
30 #include "platform/graphics/GraphicsContext.h" | 30 #include "platform/graphics/GraphicsContext.h" |
31 #include "platform/graphics/cpu/arm/filters/FEBlendNEON.h" | 31 #include "platform/graphics/cpu/arm/filters/FEBlendNEON.h" |
32 #include "platform/graphics/filters/SkiaImageFilterBuilder.h" | 32 #include "platform/graphics/filters/SkiaImageFilterBuilder.h" |
33 #include "platform/graphics/skia/NativeImageSkia.h" | 33 #include "platform/graphics/skia/NativeImageSkia.h" |
| 34 #include "platform/graphics/skia/SkiaUtils.h" |
34 #include "platform/text/TextStream.h" | 35 #include "platform/text/TextStream.h" |
35 #include "wtf/Uint8ClampedArray.h" | 36 #include "wtf/Uint8ClampedArray.h" |
36 | 37 |
37 typedef unsigned char (*BlendType)(unsigned char colorA, unsigned char colorB, u
nsigned char alphaA, unsigned char alphaB); | 38 typedef unsigned char (*BlendType)(unsigned char colorA, unsigned char colorB, u
nsigned char alphaA, unsigned char alphaB); |
38 | 39 |
39 namespace blink { | 40 namespace blink { |
40 | 41 |
41 FEBlend::FEBlend(Filter* filter, BlendModeType mode) | 42 FEBlend::FEBlend(Filter* filter, BlendModeType mode) |
42 : FilterEffect(filter) | 43 : FilterEffect(filter) |
43 , m_mode(mode) | 44 , m_mode(mode) |
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55 } | 56 } |
56 | 57 |
57 bool FEBlend::setBlendMode(BlendModeType mode) | 58 bool FEBlend::setBlendMode(BlendModeType mode) |
58 { | 59 { |
59 if (m_mode == mode) | 60 if (m_mode == mode) |
60 return false; | 61 return false; |
61 m_mode = mode; | 62 m_mode = mode; |
62 return true; | 63 return true; |
63 } | 64 } |
64 | 65 |
65 static inline unsigned char fastDivideBy255(uint16_t value) | 66 static WebBlendMode toWebBlendMode(BlendModeType mode) |
66 { | 67 { |
67 // This is an approximate algorithm for division by 255, but it gives accura
te results for 16bit values. | 68 switch (mode) { |
68 uint16_t quotient = value >> 8; | 69 case FEBLEND_MODE_NORMAL: |
69 uint16_t remainder = value - (quotient * 255) + 1; | 70 return WebBlendModeNormal; |
70 return quotient + (remainder >> 8); | 71 case FEBLEND_MODE_MULTIPLY: |
71 } | 72 return WebBlendModeMultiply; |
72 | 73 case FEBLEND_MODE_SCREEN: |
73 inline unsigned char feBlendNormal(unsigned char colorA, unsigned char colorB, u
nsigned char alphaA, unsigned char) | 74 return WebBlendModeScreen; |
74 { | 75 case FEBLEND_MODE_DARKEN: |
75 return fastDivideBy255((255 - alphaA) * colorB + colorA * 255); | 76 return WebBlendModeDarken; |
76 } | 77 case FEBLEND_MODE_LIGHTEN: |
77 | 78 return WebBlendModeLighten; |
78 inline unsigned char feBlendMultiply(unsigned char colorA, unsigned char colorB,
unsigned char alphaA, unsigned char alphaB) | 79 default: |
79 { | 80 ASSERT_NOT_REACHED(); |
80 return fastDivideBy255((255 - alphaA) * colorB + (255 - alphaB + colorB) * c
olorA); | 81 return WebBlendModeNormal; |
81 } | |
82 | |
83 inline unsigned char feBlendScreen(unsigned char colorA, unsigned char colorB, u
nsigned char, unsigned char) | |
84 { | |
85 return fastDivideBy255((colorB + colorA) * 255 - colorA * colorB); | |
86 } | |
87 | |
88 inline unsigned char feBlendDarken(unsigned char colorA, unsigned char colorB, u
nsigned char alphaA, unsigned char alphaB) | |
89 { | |
90 return fastDivideBy255(std::min((255 - alphaA) * colorB + colorA * 255, (255
- alphaB) * colorA + colorB * 255)); | |
91 } | |
92 | |
93 inline unsigned char feBlendLighten(unsigned char colorA, unsigned char colorB,
unsigned char alphaA, unsigned char alphaB) | |
94 { | |
95 return fastDivideBy255(std::max((255 - alphaA) * colorB + colorA * 255, (255
- alphaB) * colorA + colorB * 255)); | |
96 } | |
97 | |
98 inline unsigned char feBlendUnknown(unsigned char, unsigned char, unsigned char,
unsigned char) | |
99 { | |
100 return 0; | |
101 } | |
102 | |
103 template<BlendType BlendFunction> | |
104 static void platformApply(unsigned char* sourcePixelA, unsigned char* sourcePixe
lB, | |
105 unsigned char* destinationPixel, unsigned pixelArrayLe
ngth) | |
106 { | |
107 unsigned len = pixelArrayLength / 4; | |
108 for (unsigned pixelOffset = 0; pixelOffset < len; pixelOffset++) { | |
109 unsigned char alphaA = sourcePixelA[3]; | |
110 unsigned char alphaB = sourcePixelB[3]; | |
111 destinationPixel[0] = BlendFunction(sourcePixelA[0], sourcePixelB[0], al
phaA, alphaB); | |
112 destinationPixel[1] = BlendFunction(sourcePixelA[1], sourcePixelB[1], al
phaA, alphaB); | |
113 destinationPixel[2] = BlendFunction(sourcePixelA[2], sourcePixelB[2], al
phaA, alphaB); | |
114 destinationPixel[3] = 255 - fastDivideBy255((255 - alphaA) * (255 - alph
aB)); | |
115 sourcePixelA += 4; | |
116 sourcePixelB += 4; | |
117 destinationPixel += 4; | |
118 } | 82 } |
119 } | 83 } |
120 | 84 |
121 void FEBlend::platformApplyGeneric(unsigned char* sourcePixelA, unsigned char* s
ourcePixelB, | |
122 unsigned char* destinationPixel, unsigned pix
elArrayLength) | |
123 { | |
124 switch (m_mode) { | |
125 case FEBLEND_MODE_NORMAL: | |
126 platformApply<feBlendNormal>(sourcePixelA, sourcePixelB, destinationPixe
l, pixelArrayLength); | |
127 break; | |
128 case FEBLEND_MODE_MULTIPLY: | |
129 platformApply<feBlendMultiply>(sourcePixelA, sourcePixelB, destinationPi
xel, pixelArrayLength); | |
130 break; | |
131 case FEBLEND_MODE_SCREEN: | |
132 platformApply<feBlendScreen>(sourcePixelA, sourcePixelB, destinationPixe
l, pixelArrayLength); | |
133 break; | |
134 case FEBLEND_MODE_DARKEN: | |
135 platformApply<feBlendDarken>(sourcePixelA, sourcePixelB, destinationPixe
l, pixelArrayLength); | |
136 break; | |
137 case FEBLEND_MODE_LIGHTEN: | |
138 platformApply<feBlendLighten>(sourcePixelA, sourcePixelB, destinationPix
el, pixelArrayLength); | |
139 break; | |
140 case FEBLEND_MODE_UNKNOWN: | |
141 platformApply<feBlendUnknown>(sourcePixelA, sourcePixelB, destinationPix
el, pixelArrayLength); | |
142 break; | |
143 } | |
144 } | |
145 | |
146 void FEBlend::applySoftware() | 85 void FEBlend::applySoftware() |
147 { | 86 { |
148 FilterEffect* in = inputEffect(0); | 87 FilterEffect* in = inputEffect(0); |
149 FilterEffect* in2 = inputEffect(1); | 88 FilterEffect* in2 = inputEffect(1); |
150 | 89 |
151 ASSERT(m_mode > FEBLEND_MODE_UNKNOWN); | 90 ASSERT(m_mode > FEBLEND_MODE_UNKNOWN && m_mode <= FEBLEND_MODE_LIGHTEN); |
152 ASSERT(m_mode <= FEBLEND_MODE_LIGHTEN); | |
153 | 91 |
| 92 #if HAVE(ARM_NEON_INTRINSICS) |
154 Uint8ClampedArray* dstPixelArray = createPremultipliedImageResult(); | 93 Uint8ClampedArray* dstPixelArray = createPremultipliedImageResult(); |
155 if (!dstPixelArray) | 94 if (!dstPixelArray) |
156 return; | 95 return; |
157 | 96 |
158 IntRect effectADrawingRect = requestedRegionOfInputImageData(in->absolutePai
ntRect()); | 97 IntRect effectADrawingRect = requestedRegionOfInputImageData(in->absolutePai
ntRect()); |
159 RefPtr<Uint8ClampedArray> srcPixelArrayA = in->asPremultipliedImage(effectAD
rawingRect); | 98 RefPtr<Uint8ClampedArray> srcPixelArrayA = in->asPremultipliedImage(effectAD
rawingRect); |
160 | 99 |
161 IntRect effectBDrawingRect = requestedRegionOfInputImageData(in2->absolutePa
intRect()); | 100 IntRect effectBDrawingRect = requestedRegionOfInputImageData(in2->absolutePa
intRect()); |
162 RefPtr<Uint8ClampedArray> srcPixelArrayB = in2->asPremultipliedImage(effectB
DrawingRect); | 101 RefPtr<Uint8ClampedArray> srcPixelArrayB = in2->asPremultipliedImage(effectB
DrawingRect); |
163 | 102 |
164 unsigned pixelArrayLength = srcPixelArrayA->length(); | 103 unsigned pixelArrayLength = srcPixelArrayA->length(); |
165 ASSERT(pixelArrayLength == srcPixelArrayB->length()); | 104 ASSERT(pixelArrayLength == srcPixelArrayB->length()); |
166 | 105 |
167 #if HAVE(ARM_NEON_INTRINSICS) | |
168 if (pixelArrayLength >= 8) { | 106 if (pixelArrayLength >= 8) { |
169 platformApplyNEON(srcPixelArrayA->data(), srcPixelArrayB->data(), dstPix
elArray->data(), pixelArrayLength); | 107 platformApplyNEON(srcPixelArrayA->data(), srcPixelArrayB->data(), dstPix
elArray->data(), pixelArrayLength); |
170 } | 108 } else { |
171 else { // If there is just one pixel we expand it to two. | 109 // If there is just one pixel we expand it to two. |
172 ASSERT(pixelArrayLength > 0); | 110 ASSERT(pixelArrayLength > 0); |
173 uint32_t sourceA[2] = {0, 0}; | 111 uint32_t sourceA[2] = {0, 0}; |
174 uint32_t sourceBAndDest[2] = {0, 0}; | 112 uint32_t sourceBAndDest[2] = {0, 0}; |
175 | 113 |
176 sourceA[0] = reinterpret_cast<uint32_t*>(srcPixelArrayA->data())[0]; | 114 sourceA[0] = reinterpret_cast<uint32_t*>(srcPixelArrayA->data())[0]; |
177 sourceBAndDest[0] = reinterpret_cast<uint32_t*>(srcPixelArrayB->data())[
0]; | 115 sourceBAndDest[0] = reinterpret_cast<uint32_t*>(srcPixelArrayB->data())[
0]; |
178 platformApplyNEON(reinterpret_cast<uint8_t*>(sourceA), reinterpret_cast<
uint8_t*>(sourceBAndDest), reinterpret_cast<uint8_t*>(sourceBAndDest), 8); | 116 platformApplyNEON(reinterpret_cast<uint8_t*>(sourceA), reinterpret_cast<
uint8_t*>(sourceBAndDest), reinterpret_cast<uint8_t*>(sourceBAndDest), 8); |
179 reinterpret_cast<uint32_t*>(dstPixelArray->data())[0] = sourceBAndDest[0
]; | 117 reinterpret_cast<uint32_t*>(dstPixelArray->data())[0] = sourceBAndDest[0
]; |
180 } | 118 } |
181 #else | 119 #else |
182 platformApplyGeneric(srcPixelArrayA->data(), srcPixelArrayB->data(), dstPixe
lArray->data(), pixelArrayLength); | 120 ImageBuffer* resultImage = createImageBufferResult(); |
| 121 if (!resultImage) |
| 122 return; |
| 123 GraphicsContext* filterContext = resultImage->context(); |
| 124 |
| 125 ImageBuffer* imageBuffer = in->asImageBuffer(); |
| 126 ImageBuffer* imageBuffer2 = in2->asImageBuffer(); |
| 127 ASSERT(imageBuffer); |
| 128 ASSERT(imageBuffer2); |
| 129 |
| 130 WebBlendMode blendMode = toWebBlendMode(m_mode); |
| 131 filterContext->drawImageBuffer(imageBuffer2, drawingRegionOfInputImage(in2->
absolutePaintRect())); |
| 132 filterContext->drawImageBuffer(imageBuffer, drawingRegionOfInputImage(in->ab
solutePaintRect()), 0, CompositeSourceOver, blendMode); |
183 #endif | 133 #endif |
184 } | 134 } |
185 | 135 |
186 static SkXfermode::Mode toSkiaMode(BlendModeType mode) | |
187 { | |
188 switch (mode) { | |
189 case FEBLEND_MODE_NORMAL: | |
190 return SkXfermode::kSrcOver_Mode; | |
191 case FEBLEND_MODE_MULTIPLY: | |
192 return SkXfermode::kMultiply_Mode; | |
193 case FEBLEND_MODE_SCREEN: | |
194 return SkXfermode::kScreen_Mode; | |
195 case FEBLEND_MODE_DARKEN: | |
196 return SkXfermode::kDarken_Mode; | |
197 case FEBLEND_MODE_LIGHTEN: | |
198 return SkXfermode::kLighten_Mode; | |
199 default: | |
200 return SkXfermode::kSrcOver_Mode; | |
201 } | |
202 } | |
203 | |
204 PassRefPtr<SkImageFilter> FEBlend::createImageFilter(SkiaImageFilterBuilder* bui
lder) | 136 PassRefPtr<SkImageFilter> FEBlend::createImageFilter(SkiaImageFilterBuilder* bui
lder) |
205 { | 137 { |
206 RefPtr<SkImageFilter> foreground(builder->build(inputEffect(0), operatingCol
orSpace())); | 138 RefPtr<SkImageFilter> foreground(builder->build(inputEffect(0), operatingCol
orSpace())); |
207 RefPtr<SkImageFilter> background(builder->build(inputEffect(1), operatingCol
orSpace())); | 139 RefPtr<SkImageFilter> background(builder->build(inputEffect(1), operatingCol
orSpace())); |
208 SkAutoTUnref<SkXfermode> mode(SkXfermode::Create(toSkiaMode(m_mode))); | 140 RefPtr<SkXfermode> mode(WebCoreCompositeToSkiaComposite(CompositeSourceOver,
toWebBlendMode(m_mode))); |
209 SkImageFilter::CropRect cropRect = getCropRect(builder->cropOffset()); | 141 SkImageFilter::CropRect cropRect = getCropRect(builder->cropOffset()); |
210 return adoptRef(SkXfermodeImageFilter::Create(mode, background.get(), foregr
ound.get(), &cropRect)); | 142 return adoptRef(SkXfermodeImageFilter::Create(mode.get(), background.get(),
foreground.get(), &cropRect)); |
211 } | 143 } |
212 | 144 |
213 static TextStream& operator<<(TextStream& ts, const BlendModeType& type) | 145 static TextStream& operator<<(TextStream& ts, const BlendModeType& type) |
214 { | 146 { |
215 switch (type) { | 147 switch (type) { |
216 case FEBLEND_MODE_UNKNOWN: | 148 case FEBLEND_MODE_UNKNOWN: |
217 ts << "unknown"; | 149 ts << "unknown"; |
218 break; | 150 break; |
219 case FEBLEND_MODE_NORMAL: | 151 case FEBLEND_MODE_NORMAL: |
220 ts << "normal"; | 152 ts << "normal"; |
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240 writeIndent(ts, indent); | 172 writeIndent(ts, indent); |
241 ts << "[feBlend"; | 173 ts << "[feBlend"; |
242 FilterEffect::externalRepresentation(ts); | 174 FilterEffect::externalRepresentation(ts); |
243 ts << " mode=\"" << m_mode << "\"]\n"; | 175 ts << " mode=\"" << m_mode << "\"]\n"; |
244 inputEffect(0)->externalRepresentation(ts, indent + 1); | 176 inputEffect(0)->externalRepresentation(ts, indent + 1); |
245 inputEffect(1)->externalRepresentation(ts, indent + 1); | 177 inputEffect(1)->externalRepresentation(ts, indent + 1); |
246 return ts; | 178 return ts; |
247 } | 179 } |
248 | 180 |
249 } // namespace blink | 181 } // namespace blink |
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