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| 1 // Copyright 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "cc/output/render_surface_filters.h" | |
| 6 | |
| 7 #include <algorithm> | |
| 8 | |
| 9 #include "cc/output/filter_operation.h" | |
| 10 #include "cc/output/filter_operations.h" | |
| 11 #include "skia/ext/refptr.h" | |
| 12 #include "third_party/skia/include/core/SkImageFilter.h" | |
| 13 #include "third_party/skia/include/effects/SkAlphaThresholdFilter.h" | |
| 14 #include "third_party/skia/include/effects/SkBlurImageFilter.h" | |
| 15 #include "third_party/skia/include/effects/SkColorFilterImageFilter.h" | |
| 16 #include "third_party/skia/include/effects/SkColorMatrixFilter.h" | |
| 17 #include "third_party/skia/include/effects/SkComposeImageFilter.h" | |
| 18 #include "third_party/skia/include/effects/SkDropShadowImageFilter.h" | |
| 19 #include "third_party/skia/include/effects/SkMagnifierImageFilter.h" | |
| 20 #include "third_party/skia/include/effects/SkRectShaderImageFilter.h" | |
| 21 #include "ui/gfx/geometry/size_f.h" | |
| 22 | |
| 23 namespace cc { | |
| 24 | |
| 25 namespace { | |
| 26 | |
| 27 void GetBrightnessMatrix(float amount, SkScalar matrix[20]) { | |
| 28 // Spec implementation | |
| 29 // (http://dvcs.w3.org/hg/FXTF/raw-file/tip/filters/index.html#brightnessEquiv
alent) | |
| 30 // <feFunc[R|G|B] type="linear" slope="[amount]"> | |
| 31 memset(matrix, 0, 20 * sizeof(SkScalar)); | |
| 32 matrix[0] = matrix[6] = matrix[12] = amount; | |
| 33 matrix[18] = 1.f; | |
| 34 } | |
| 35 | |
| 36 void GetSaturatingBrightnessMatrix(float amount, SkScalar matrix[20]) { | |
| 37 // Legacy implementation used by internal clients. | |
| 38 // <feFunc[R|G|B] type="linear" intercept="[amount]"/> | |
| 39 memset(matrix, 0, 20 * sizeof(SkScalar)); | |
| 40 matrix[0] = matrix[6] = matrix[12] = matrix[18] = 1.f; | |
| 41 matrix[4] = matrix[9] = matrix[14] = amount * 255.f; | |
| 42 } | |
| 43 | |
| 44 void GetContrastMatrix(float amount, SkScalar matrix[20]) { | |
| 45 memset(matrix, 0, 20 * sizeof(SkScalar)); | |
| 46 matrix[0] = matrix[6] = matrix[12] = amount; | |
| 47 matrix[4] = matrix[9] = matrix[14] = (-0.5f * amount + 0.5f) * 255.f; | |
| 48 matrix[18] = 1.f; | |
| 49 } | |
| 50 | |
| 51 void GetSaturateMatrix(float amount, SkScalar matrix[20]) { | |
| 52 // Note, these values are computed to ensure MatrixNeedsClamping is false | |
| 53 // for amount in [0..1] | |
| 54 matrix[0] = 0.213f + 0.787f * amount; | |
| 55 matrix[1] = 0.715f - 0.715f * amount; | |
| 56 matrix[2] = 1.f - (matrix[0] + matrix[1]); | |
| 57 matrix[3] = matrix[4] = 0.f; | |
| 58 matrix[5] = 0.213f - 0.213f * amount; | |
| 59 matrix[6] = 0.715f + 0.285f * amount; | |
| 60 matrix[7] = 1.f - (matrix[5] + matrix[6]); | |
| 61 matrix[8] = matrix[9] = 0.f; | |
| 62 matrix[10] = 0.213f - 0.213f * amount; | |
| 63 matrix[11] = 0.715f - 0.715f * amount; | |
| 64 matrix[12] = 1.f - (matrix[10] + matrix[11]); | |
| 65 matrix[13] = matrix[14] = 0.f; | |
| 66 matrix[15] = matrix[16] = matrix[17] = matrix[19] = 0.f; | |
| 67 matrix[18] = 1.f; | |
| 68 } | |
| 69 | |
| 70 void GetHueRotateMatrix(float hue, SkScalar matrix[20]) { | |
| 71 const float kPi = 3.1415926535897932384626433832795f; | |
| 72 | |
| 73 float cos_hue = cosf(hue * kPi / 180.f); | |
| 74 float sin_hue = sinf(hue * kPi / 180.f); | |
| 75 matrix[0] = 0.213f + cos_hue * 0.787f - sin_hue * 0.213f; | |
| 76 matrix[1] = 0.715f - cos_hue * 0.715f - sin_hue * 0.715f; | |
| 77 matrix[2] = 0.072f - cos_hue * 0.072f + sin_hue * 0.928f; | |
| 78 matrix[3] = matrix[4] = 0.f; | |
| 79 matrix[5] = 0.213f - cos_hue * 0.213f + sin_hue * 0.143f; | |
| 80 matrix[6] = 0.715f + cos_hue * 0.285f + sin_hue * 0.140f; | |
| 81 matrix[7] = 0.072f - cos_hue * 0.072f - sin_hue * 0.283f; | |
| 82 matrix[8] = matrix[9] = 0.f; | |
| 83 matrix[10] = 0.213f - cos_hue * 0.213f - sin_hue * 0.787f; | |
| 84 matrix[11] = 0.715f - cos_hue * 0.715f + sin_hue * 0.715f; | |
| 85 matrix[12] = 0.072f + cos_hue * 0.928f + sin_hue * 0.072f; | |
| 86 matrix[13] = matrix[14] = 0.f; | |
| 87 matrix[15] = matrix[16] = matrix[17] = 0.f; | |
| 88 matrix[18] = 1.f; | |
| 89 matrix[19] = 0.f; | |
| 90 } | |
| 91 | |
| 92 void GetInvertMatrix(float amount, SkScalar matrix[20]) { | |
| 93 memset(matrix, 0, 20 * sizeof(SkScalar)); | |
| 94 matrix[0] = matrix[6] = matrix[12] = 1.f - 2.f * amount; | |
| 95 matrix[4] = matrix[9] = matrix[14] = amount * 255.f; | |
| 96 matrix[18] = 1.f; | |
| 97 } | |
| 98 | |
| 99 void GetOpacityMatrix(float amount, SkScalar matrix[20]) { | |
| 100 memset(matrix, 0, 20 * sizeof(SkScalar)); | |
| 101 matrix[0] = matrix[6] = matrix[12] = 1.f; | |
| 102 matrix[18] = amount; | |
| 103 } | |
| 104 | |
| 105 void GetGrayscaleMatrix(float amount, SkScalar matrix[20]) { | |
| 106 // Note, these values are computed to ensure MatrixNeedsClamping is false | |
| 107 // for amount in [0..1] | |
| 108 matrix[0] = 0.2126f + 0.7874f * amount; | |
| 109 matrix[1] = 0.7152f - 0.7152f * amount; | |
| 110 matrix[2] = 1.f - (matrix[0] + matrix[1]); | |
| 111 matrix[3] = matrix[4] = 0.f; | |
| 112 | |
| 113 matrix[5] = 0.2126f - 0.2126f * amount; | |
| 114 matrix[6] = 0.7152f + 0.2848f * amount; | |
| 115 matrix[7] = 1.f - (matrix[5] + matrix[6]); | |
| 116 matrix[8] = matrix[9] = 0.f; | |
| 117 | |
| 118 matrix[10] = 0.2126f - 0.2126f * amount; | |
| 119 matrix[11] = 0.7152f - 0.7152f * amount; | |
| 120 matrix[12] = 1.f - (matrix[10] + matrix[11]); | |
| 121 matrix[13] = matrix[14] = 0.f; | |
| 122 | |
| 123 matrix[15] = matrix[16] = matrix[17] = matrix[19] = 0.f; | |
| 124 matrix[18] = 1.f; | |
| 125 } | |
| 126 | |
| 127 void GetSepiaMatrix(float amount, SkScalar matrix[20]) { | |
| 128 matrix[0] = 0.393f + 0.607f * amount; | |
| 129 matrix[1] = 0.769f - 0.769f * amount; | |
| 130 matrix[2] = 0.189f - 0.189f * amount; | |
| 131 matrix[3] = matrix[4] = 0.f; | |
| 132 | |
| 133 matrix[5] = 0.349f - 0.349f * amount; | |
| 134 matrix[6] = 0.686f + 0.314f * amount; | |
| 135 matrix[7] = 0.168f - 0.168f * amount; | |
| 136 matrix[8] = matrix[9] = 0.f; | |
| 137 | |
| 138 matrix[10] = 0.272f - 0.272f * amount; | |
| 139 matrix[11] = 0.534f - 0.534f * amount; | |
| 140 matrix[12] = 0.131f + 0.869f * amount; | |
| 141 matrix[13] = matrix[14] = 0.f; | |
| 142 | |
| 143 matrix[15] = matrix[16] = matrix[17] = matrix[19] = 0.f; | |
| 144 matrix[18] = 1.f; | |
| 145 } | |
| 146 | |
| 147 skia::RefPtr<SkImageFilter> CreateMatrixImageFilter( | |
| 148 const SkScalar matrix[20], | |
| 149 const skia::RefPtr<SkImageFilter>& input) { | |
| 150 skia::RefPtr<SkColorFilter> color_filter = | |
| 151 skia::AdoptRef(SkColorMatrixFilter::Create(matrix)); | |
| 152 return skia::AdoptRef( | |
| 153 SkColorFilterImageFilter::Create(color_filter.get(), input.get())); | |
| 154 } | |
| 155 | |
| 156 } // namespace | |
| 157 | |
| 158 skia::RefPtr<SkImageFilter> RenderSurfaceFilters::BuildImageFilter( | |
| 159 const FilterOperations& filters, | |
| 160 const gfx::SizeF& size) { | |
| 161 skia::RefPtr<SkImageFilter> image_filter; | |
| 162 SkScalar matrix[20]; | |
| 163 for (size_t i = 0; i < filters.size(); ++i) { | |
| 164 const FilterOperation& op = filters.at(i); | |
| 165 switch (op.type()) { | |
| 166 case FilterOperation::GRAYSCALE: | |
| 167 GetGrayscaleMatrix(1.f - op.amount(), matrix); | |
| 168 image_filter = CreateMatrixImageFilter(matrix, image_filter); | |
| 169 break; | |
| 170 case FilterOperation::SEPIA: | |
| 171 GetSepiaMatrix(1.f - op.amount(), matrix); | |
| 172 image_filter = CreateMatrixImageFilter(matrix, image_filter); | |
| 173 break; | |
| 174 case FilterOperation::SATURATE: | |
| 175 GetSaturateMatrix(op.amount(), matrix); | |
| 176 image_filter = CreateMatrixImageFilter(matrix, image_filter); | |
| 177 break; | |
| 178 case FilterOperation::HUE_ROTATE: | |
| 179 GetHueRotateMatrix(op.amount(), matrix); | |
| 180 image_filter = CreateMatrixImageFilter(matrix, image_filter); | |
| 181 break; | |
| 182 case FilterOperation::INVERT: | |
| 183 GetInvertMatrix(op.amount(), matrix); | |
| 184 image_filter = CreateMatrixImageFilter(matrix, image_filter); | |
| 185 break; | |
| 186 case FilterOperation::OPACITY: | |
| 187 GetOpacityMatrix(op.amount(), matrix); | |
| 188 image_filter = CreateMatrixImageFilter(matrix, image_filter); | |
| 189 break; | |
| 190 case FilterOperation::BRIGHTNESS: | |
| 191 GetBrightnessMatrix(op.amount(), matrix); | |
| 192 image_filter = CreateMatrixImageFilter(matrix, image_filter); | |
| 193 break; | |
| 194 case FilterOperation::CONTRAST: | |
| 195 GetContrastMatrix(op.amount(), matrix); | |
| 196 image_filter = CreateMatrixImageFilter(matrix, image_filter); | |
| 197 break; | |
| 198 case FilterOperation::BLUR: | |
| 199 image_filter = skia::AdoptRef(SkBlurImageFilter::Create( | |
| 200 op.amount(), op.amount(), image_filter.get())); | |
| 201 break; | |
| 202 case FilterOperation::DROP_SHADOW: | |
| 203 image_filter = skia::AdoptRef(SkDropShadowImageFilter::Create( | |
| 204 SkIntToScalar(op.drop_shadow_offset().x()), | |
| 205 SkIntToScalar(op.drop_shadow_offset().y()), | |
| 206 SkIntToScalar(op.amount()), | |
| 207 SkIntToScalar(op.amount()), | |
| 208 op.drop_shadow_color(), | |
| 209 SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode, | |
| 210 image_filter.get())); | |
| 211 break; | |
| 212 case FilterOperation::COLOR_MATRIX: | |
| 213 image_filter = CreateMatrixImageFilter(op.matrix(), image_filter); | |
| 214 break; | |
| 215 case FilterOperation::ZOOM: { | |
| 216 skia::RefPtr<SkImageFilter> zoom_filter = | |
| 217 skia::AdoptRef(SkMagnifierImageFilter::Create( | |
| 218 SkRect::MakeXYWH( | |
| 219 (size.width() - (size.width() / op.amount())) / 2.f, | |
| 220 (size.height() - (size.height() / op.amount())) / 2.f, | |
| 221 size.width() / op.amount(), | |
| 222 size.height() / op.amount()), | |
| 223 op.zoom_inset())); | |
| 224 if (image_filter.get()) { | |
| 225 // TODO(ajuma): When there's a 1-input version of | |
| 226 // SkMagnifierImageFilter, use that to handle the input filter | |
| 227 // instead of using an SkComposeImageFilter. | |
| 228 image_filter = skia::AdoptRef(SkComposeImageFilter::Create( | |
| 229 zoom_filter.get(), image_filter.get())); | |
| 230 } else { | |
| 231 image_filter = zoom_filter; | |
| 232 } | |
| 233 break; | |
| 234 } | |
| 235 case FilterOperation::SATURATING_BRIGHTNESS: | |
| 236 GetSaturatingBrightnessMatrix(op.amount(), matrix); | |
| 237 image_filter = CreateMatrixImageFilter(matrix, image_filter); | |
| 238 break; | |
| 239 case FilterOperation::REFERENCE: { | |
| 240 if (!op.image_filter()) | |
| 241 break; | |
| 242 | |
| 243 skia::RefPtr<SkColorFilter> cf; | |
| 244 | |
| 245 { | |
| 246 SkColorFilter* colorfilter_rawptr = NULL; | |
| 247 op.image_filter()->asColorFilter(&colorfilter_rawptr); | |
| 248 cf = skia::AdoptRef(colorfilter_rawptr); | |
| 249 } | |
| 250 | |
| 251 if (cf && cf->asColorMatrix(matrix) && | |
| 252 !op.image_filter()->getInput(0)) { | |
| 253 image_filter = CreateMatrixImageFilter(matrix, image_filter); | |
| 254 } else if (image_filter) { | |
| 255 image_filter = skia::AdoptRef(SkComposeImageFilter::Create( | |
| 256 op.image_filter().get(), image_filter.get())); | |
| 257 } else { | |
| 258 image_filter = op.image_filter(); | |
| 259 } | |
| 260 break; | |
| 261 } | |
| 262 case FilterOperation::ALPHA_THRESHOLD: { | |
| 263 skia::RefPtr<SkImageFilter> alpha_filter = skia::AdoptRef( | |
| 264 SkAlphaThresholdFilter::Create( | |
| 265 op.region(), op.amount(), op.outer_threshold())); | |
| 266 if (image_filter.get()) { | |
| 267 image_filter = skia::AdoptRef(SkComposeImageFilter::Create( | |
| 268 alpha_filter.get(), image_filter.get())); | |
| 269 } else { | |
| 270 image_filter = alpha_filter; | |
| 271 } | |
| 272 break; | |
| 273 } | |
| 274 } | |
| 275 } | |
| 276 return image_filter; | |
| 277 } | |
| 278 | |
| 279 } // namespace cc | |
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