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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "ui/gfx/skia_util.h" | 5 #include "ui/gfx/skia_util.h" |
6 | 6 |
7 #include "third_party/skia/include/core/SkBitmap.h" | 7 #include "third_party/skia/include/core/SkBitmap.h" |
8 #include "third_party/skia/include/core/SkColorFilter.h" | 8 #include "third_party/skia/include/core/SkColorFilter.h" |
9 #include "third_party/skia/include/core/SkColorPriv.h" | 9 #include "third_party/skia/include/core/SkColorPriv.h" |
10 #include "third_party/skia/include/core/SkUnPreMultiply.h" | 10 #include "third_party/skia/include/core/SkUnPreMultiply.h" |
11 #include "third_party/skia/include/effects/SkBlurMaskFilter.h" | 11 #include "third_party/skia/include/effects/SkBlurMaskFilter.h" |
12 #include "third_party/skia/include/effects/SkGradientShader.h" | 12 #include "third_party/skia/include/effects/SkGradientShader.h" |
13 #include "third_party/skia/include/effects/SkLayerDrawLooper.h" | 13 #include "third_party/skia/include/effects/SkLayerDrawLooper.h" |
14 #include "ui/gfx/image/image_skia_rep.h" | |
15 #include "ui/gfx/rect.h" | 14 #include "ui/gfx/rect.h" |
16 #include "ui/gfx/rect_f.h" | 15 #include "ui/gfx/rect_f.h" |
17 #include "ui/gfx/shadow_value.h" | |
18 #include "ui/gfx/transform.h" | 16 #include "ui/gfx/transform.h" |
19 | 17 |
20 namespace gfx { | 18 namespace gfx { |
21 | 19 |
22 SkRect RectToSkRect(const Rect& rect) { | 20 SkRect RectToSkRect(const Rect& rect) { |
23 SkRect r; | 21 SkRect r; |
24 r.iset(rect.x(), rect.y(), rect.right(), rect.bottom()); | 22 r.iset(rect.x(), rect.y(), rect.right(), rect.bottom()); |
25 return r; | 23 return r; |
26 } | 24 } |
27 | 25 |
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54 flattened->set(1, SkMScalarToScalar(transform.matrix().get(0, 1))); | 52 flattened->set(1, SkMScalarToScalar(transform.matrix().get(0, 1))); |
55 flattened->set(2, SkMScalarToScalar(transform.matrix().get(0, 3))); | 53 flattened->set(2, SkMScalarToScalar(transform.matrix().get(0, 3))); |
56 flattened->set(3, SkMScalarToScalar(transform.matrix().get(1, 0))); | 54 flattened->set(3, SkMScalarToScalar(transform.matrix().get(1, 0))); |
57 flattened->set(4, SkMScalarToScalar(transform.matrix().get(1, 1))); | 55 flattened->set(4, SkMScalarToScalar(transform.matrix().get(1, 1))); |
58 flattened->set(5, SkMScalarToScalar(transform.matrix().get(1, 3))); | 56 flattened->set(5, SkMScalarToScalar(transform.matrix().get(1, 3))); |
59 flattened->set(6, SkMScalarToScalar(transform.matrix().get(3, 0))); | 57 flattened->set(6, SkMScalarToScalar(transform.matrix().get(3, 0))); |
60 flattened->set(7, SkMScalarToScalar(transform.matrix().get(3, 1))); | 58 flattened->set(7, SkMScalarToScalar(transform.matrix().get(3, 1))); |
61 flattened->set(8, SkMScalarToScalar(transform.matrix().get(3, 3))); | 59 flattened->set(8, SkMScalarToScalar(transform.matrix().get(3, 3))); |
62 } | 60 } |
63 | 61 |
64 skia::RefPtr<SkShader> CreateImageRepShader(const gfx::ImageSkiaRep& image_rep, | |
65 SkShader::TileMode tile_mode, | |
66 const SkMatrix& local_matrix) { | |
67 return CreateImageRepShaderForScale(image_rep, tile_mode, local_matrix, | |
68 image_rep.scale()); | |
69 } | |
70 | |
71 skia::RefPtr<SkShader> CreateImageRepShaderForScale( | |
72 const gfx::ImageSkiaRep& image_rep, | |
73 SkShader::TileMode tile_mode, | |
74 const SkMatrix& local_matrix, | |
75 SkScalar scale) { | |
76 // Unscale matrix by |scale| such that the bitmap is drawn at the | |
77 // correct density. | |
78 // Convert skew and translation to pixel coordinates. | |
79 // Thus, for |bitmap_scale| = 2: | |
80 // x scale = 2, x translation = 1 DIP, | |
81 // should be converted to | |
82 // x scale = 1, x translation = 2 pixels. | |
83 SkMatrix shader_scale = local_matrix; | |
84 shader_scale.preScale(scale, scale); | |
85 shader_scale.setScaleX(local_matrix.getScaleX() / scale); | |
86 shader_scale.setScaleY(local_matrix.getScaleY() / scale); | |
87 | |
88 skia::RefPtr<SkShader> shader = skia::AdoptRef(SkShader::CreateBitmapShader( | |
89 image_rep.sk_bitmap(), tile_mode, tile_mode, &shader_scale)); | |
90 return shader; | |
91 } | |
92 | |
93 skia::RefPtr<SkShader> CreateGradientShader(int start_point, | 62 skia::RefPtr<SkShader> CreateGradientShader(int start_point, |
94 int end_point, | 63 int end_point, |
95 SkColor start_color, | 64 SkColor start_color, |
96 SkColor end_color) { | 65 SkColor end_color) { |
97 SkColor grad_colors[2] = { start_color, end_color}; | 66 SkColor grad_colors[2] = { start_color, end_color}; |
98 SkPoint grad_points[2]; | 67 SkPoint grad_points[2]; |
99 grad_points[0].iset(0, start_point); | 68 grad_points[0].iset(0, start_point); |
100 grad_points[1].iset(0, end_point); | 69 grad_points[1].iset(0, end_point); |
101 | 70 |
102 return skia::AdoptRef(SkGradientShader::CreateLinear( | 71 return skia::AdoptRef(SkGradientShader::CreateLinear( |
103 grad_points, grad_colors, NULL, 2, SkShader::kRepeat_TileMode)); | 72 grad_points, grad_colors, NULL, 2, SkShader::kRepeat_TileMode)); |
104 } | 73 } |
105 | 74 |
106 static SkScalar RadiusToSigma(double radius) { | |
107 // This captures historically what skia did under the hood. Now skia accepts | |
108 // sigma, not radius, so we perform the conversion. | |
109 return radius > 0 ? SkDoubleToScalar(0.57735f * radius + 0.5) : 0; | |
110 } | |
111 | |
112 skia::RefPtr<SkDrawLooper> CreateShadowDrawLooper( | |
113 const std::vector<ShadowValue>& shadows) { | |
114 if (shadows.empty()) | |
115 return skia::RefPtr<SkDrawLooper>(); | |
116 | |
117 SkLayerDrawLooper::Builder looper_builder; | |
118 | |
119 looper_builder.addLayer(); // top layer of the original. | |
120 | |
121 SkLayerDrawLooper::LayerInfo layer_info; | |
122 layer_info.fPaintBits |= SkLayerDrawLooper::kMaskFilter_Bit; | |
123 layer_info.fPaintBits |= SkLayerDrawLooper::kColorFilter_Bit; | |
124 layer_info.fColorMode = SkXfermode::kSrc_Mode; | |
125 | |
126 for (size_t i = 0; i < shadows.size(); ++i) { | |
127 const ShadowValue& shadow = shadows[i]; | |
128 | |
129 layer_info.fOffset.set(SkIntToScalar(shadow.x()), | |
130 SkIntToScalar(shadow.y())); | |
131 | |
132 // SkBlurMaskFilter's blur radius defines the range to extend the blur from | |
133 // original mask, which is half of blur amount as defined in ShadowValue. | |
134 skia::RefPtr<SkMaskFilter> blur_mask = skia::AdoptRef( | |
135 SkBlurMaskFilter::Create(kNormal_SkBlurStyle, | |
136 RadiusToSigma(shadow.blur() / 2), | |
137 SkBlurMaskFilter::kHighQuality_BlurFlag)); | |
138 skia::RefPtr<SkColorFilter> color_filter = skia::AdoptRef( | |
139 SkColorFilter::CreateModeFilter(shadow.color(), | |
140 SkXfermode::kSrcIn_Mode)); | |
141 | |
142 SkPaint* paint = looper_builder.addLayer(layer_info); | |
143 paint->setMaskFilter(blur_mask.get()); | |
144 paint->setColorFilter(color_filter.get()); | |
145 } | |
146 | |
147 return skia::AdoptRef<SkDrawLooper>(looper_builder.detachLooper()); | |
148 } | |
149 | |
150 bool BitmapsAreEqual(const SkBitmap& bitmap1, const SkBitmap& bitmap2) { | 75 bool BitmapsAreEqual(const SkBitmap& bitmap1, const SkBitmap& bitmap2) { |
151 void* addr1 = NULL; | 76 void* addr1 = NULL; |
152 void* addr2 = NULL; | 77 void* addr2 = NULL; |
153 size_t size1 = 0; | 78 size_t size1 = 0; |
154 size_t size2 = 0; | 79 size_t size2 = 0; |
155 | 80 |
156 bitmap1.lockPixels(); | 81 bitmap1.lockPixels(); |
157 addr1 = bitmap1.getAddr32(0, 0); | 82 addr1 = bitmap1.getAddr32(0, 0); |
158 size1 = bitmap1.getSize(); | 83 size1 = bitmap1.getSize(); |
159 bitmap1.unlockPixels(); | 84 bitmap1.unlockPixels(); |
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184 } else { | 109 } else { |
185 rgba[i + 0] = SkGetPackedR32(pixel_in); | 110 rgba[i + 0] = SkGetPackedR32(pixel_in); |
186 rgba[i + 1] = SkGetPackedG32(pixel_in); | 111 rgba[i + 1] = SkGetPackedG32(pixel_in); |
187 rgba[i + 2] = SkGetPackedB32(pixel_in); | 112 rgba[i + 2] = SkGetPackedB32(pixel_in); |
188 rgba[i + 3] = alpha; | 113 rgba[i + 3] = alpha; |
189 } | 114 } |
190 } | 115 } |
191 } | 116 } |
192 | 117 |
193 } // namespace gfx | 118 } // namespace gfx |
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