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Side by Side Diff: third_party/WebKit/Source/platform/graphics/Gradient.cpp

Issue 2754783003: Remove two Gradient setters (Closed)
Patch Set: Created 3 years, 9 months ago
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1 /* 1 /*
2 * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved. 2 * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
3 * Copyright (C) 2007 Alp Toker <alp@atoker.com> 3 * Copyright (C) 2007 Alp Toker <alp@atoker.com>
4 * Copyright (C) 2013 Google Inc. All rights reserved. 4 * Copyright (C) 2013 Google Inc. All rights reserved.
5 * 5 *
6 * Redistribution and use in source and binary forms, with or without 6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions 7 * modification, are permitted provided that the following conditions
8 * are met: 8 * are met:
9 * 1. Redistributions of source code must retain the above copyright 9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer. 10 * notice, this list of conditions and the following disclaimer.
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35 #include "third_party/skia/include/core/SkMatrix.h" 35 #include "third_party/skia/include/core/SkMatrix.h"
36 #include "third_party/skia/include/core/SkShader.h" 36 #include "third_party/skia/include/core/SkShader.h"
37 #include "third_party/skia/include/effects/SkGradientShader.h" 37 #include "third_party/skia/include/effects/SkGradientShader.h"
38 #include <algorithm> 38 #include <algorithm>
39 39
40 typedef Vector<SkScalar, 8> ColorStopOffsetVector; 40 typedef Vector<SkScalar, 8> ColorStopOffsetVector;
41 typedef Vector<SkColor, 8> ColorStopColorVector; 41 typedef Vector<SkColor, 8> ColorStopColorVector;
42 42
43 namespace blink { 43 namespace blink {
44 44
45 Gradient::Gradient(const FloatPoint& p0, const FloatPoint& p1) 45 Gradient::Gradient(const FloatPoint& p0,
46 const FloatPoint& p1,
47 GradientSpreadMethod spreadMethod,
48 ColorInterpolation interpolation)
46 : m_p0(p0), 49 : m_p0(p0),
47 m_p1(p1), 50 m_p1(p1),
48 m_r0(0), 51 m_r0(0),
49 m_r1(0), 52 m_r1(0),
50 m_aspectRatio(1), 53 m_aspectRatio(1),
51 m_radial(false), 54 m_radial(false),
52 m_stopsSorted(false), 55 m_stopsSorted(false),
53 m_drawInPMColorSpace(false), 56 m_spreadMethod(spreadMethod),
54 m_spreadMethod(SpreadMethodPad) {} 57 m_colorInterpolation(interpolation) {}
55 58
56 Gradient::Gradient(const FloatPoint& p0, 59 Gradient::Gradient(const FloatPoint& p0,
57 float r0, 60 float r0,
58 const FloatPoint& p1, 61 const FloatPoint& p1,
59 float r1, 62 float r1,
60 float aspectRatio) 63 float aspectRatio,
64 GradientSpreadMethod spreadMethod,
65 ColorInterpolation interpolation)
61 : m_p0(p0), 66 : m_p0(p0),
62 m_p1(p1), 67 m_p1(p1),
63 m_r0(r0), 68 m_r0(r0),
64 m_r1(r1), 69 m_r1(r1),
65 m_aspectRatio(aspectRatio), 70 m_aspectRatio(aspectRatio),
66 m_radial(true), 71 m_radial(true),
67 m_stopsSorted(false), 72 m_stopsSorted(false),
68 m_drawInPMColorSpace(false), 73 m_spreadMethod(spreadMethod),
69 m_spreadMethod(SpreadMethodPad) {} 74 m_colorInterpolation(interpolation) {}
70 75
71 Gradient::~Gradient() {} 76 Gradient::~Gradient() {}
72 77
73 static inline bool compareStops(const Gradient::ColorStop& a, 78 static inline bool compareStops(const Gradient::ColorStop& a,
74 const Gradient::ColorStop& b) { 79 const Gradient::ColorStop& b) {
75 return a.stop < b.stop; 80 return a.stop < b.stop;
76 } 81 }
77 82
78 void Gradient::addColorStop(const Gradient::ColorStop& stop) { 83 void Gradient::addColorStop(const Gradient::ColorStop& stop) {
79 if (m_stops.isEmpty()) { 84 if (m_stops.isEmpty()) {
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96 return; 101 return;
97 102
98 m_stopsSorted = true; 103 m_stopsSorted = true;
99 104
100 if (!m_stops.size()) 105 if (!m_stops.size())
101 return; 106 return;
102 107
103 std::stable_sort(m_stops.begin(), m_stops.end(), compareStops); 108 std::stable_sort(m_stops.begin(), m_stops.end(), compareStops);
104 } 109 }
105 110
106 void Gradient::setSpreadMethod(GradientSpreadMethod spreadMethod) {
107 // FIXME: Should it become necessary, allow calls to this method after
108 // |m_gradient| has been set.
109 DCHECK(!m_cachedShader);
110
111 if (m_spreadMethod == spreadMethod)
112 return;
113
114 m_spreadMethod = spreadMethod;
115 }
116
117 void Gradient::setDrawsInPMColorSpace(bool drawInPMColorSpace) {
118 if (drawInPMColorSpace == m_drawInPMColorSpace)
119 return;
120
121 m_drawInPMColorSpace = drawInPMColorSpace;
122 m_cachedShader.reset();
123 }
124
125 // Determine the total number of stops needed, including pseudo-stops at the 111 // Determine the total number of stops needed, including pseudo-stops at the
126 // ends as necessary. 112 // ends as necessary.
127 static size_t totalStopsNeeded(const Gradient::ColorStop* stopData, 113 static size_t totalStopsNeeded(const Gradient::ColorStop* stopData,
128 size_t count) { 114 size_t count) {
129 // N.B.: The tests in this function should kept in sync with the ones in 115 // N.B.: The tests in this function should kept in sync with the ones in
130 // fillStops(), or badness happens. 116 // fillStops(), or badness happens.
131 const Gradient::ColorStop* stop = stopData; 117 const Gradient::ColorStop* stop = stopData;
132 size_t countUsed = count; 118 size_t countUsed = count;
133 if (count < 1 || stop->stop > 0.0) 119 if (count < 1 || stop->stop > 0.0)
134 countUsed++; 120 countUsed++;
(...skipping 66 matching lines...) Expand 10 before | Expand all | Expand 10 after
201 break; 187 break;
202 case SpreadMethodRepeat: 188 case SpreadMethodRepeat:
203 tile = SkShader::kRepeat_TileMode; 189 tile = SkShader::kRepeat_TileMode;
204 break; 190 break;
205 case SpreadMethodPad: 191 case SpreadMethodPad:
206 tile = SkShader::kClamp_TileMode; 192 tile = SkShader::kClamp_TileMode;
207 break; 193 break;
208 } 194 }
209 195
210 sk_sp<SkShader> shader; 196 sk_sp<SkShader> shader;
211 uint32_t shouldDrawInPMColorSpace = 197 uint32_t flags = m_colorInterpolation == ColorInterpolation::Premultiplied
212 m_drawInPMColorSpace ? SkGradientShader::kInterpolateColorsInPremul_Flag 198 ? SkGradientShader::kInterpolateColorsInPremul_Flag
213 : 0; 199 : 0;
214 if (m_radial) { 200 if (m_radial) {
215 SkMatrix adjustedLocalMatrix = localMatrix; 201 SkMatrix adjustedLocalMatrix = localMatrix;
216 202
217 if (m_aspectRatio != 1) { 203 if (m_aspectRatio != 1) {
218 // CSS3 elliptical gradients: apply the elliptical scaling at the 204 // CSS3 elliptical gradients: apply the elliptical scaling at the
219 // gradient center point. 205 // gradient center point.
220 adjustedLocalMatrix.preTranslate(m_p0.x(), m_p0.y()); 206 adjustedLocalMatrix.preTranslate(m_p0.x(), m_p0.y());
221 adjustedLocalMatrix.preScale(1, 1 / m_aspectRatio); 207 adjustedLocalMatrix.preScale(1, 1 / m_aspectRatio);
222 adjustedLocalMatrix.preTranslate(-m_p0.x(), -m_p0.y()); 208 adjustedLocalMatrix.preTranslate(-m_p0.x(), -m_p0.y());
223 ASSERT(m_p0 == m_p1); 209 ASSERT(m_p0 == m_p1);
224 } 210 }
225 211
226 // Since the two-point radial gradient is slower than the plain radial, 212 // Since the two-point radial gradient is slower than the plain radial,
227 // only use it if we have to. 213 // only use it if we have to.
228 if (m_p0 == m_p1 && m_r0 <= 0.0f) { 214 if (m_p0 == m_p1 && m_r0 <= 0.0f) {
229 shader = SkGradientShader::MakeRadial( 215 shader = SkGradientShader::MakeRadial(
230 m_p1.data(), m_r1, colors.data(), pos.data(), 216 m_p1.data(), m_r1, colors.data(), pos.data(),
231 static_cast<int>(countUsed), tile, shouldDrawInPMColorSpace, 217 static_cast<int>(countUsed), tile, flags, &adjustedLocalMatrix);
232 &adjustedLocalMatrix);
233 } else { 218 } else {
234 // The radii we give to Skia must be positive. If we're given a 219 // The radii we give to Skia must be positive. If we're given a
235 // negative radius, ask for zero instead. 220 // negative radius, ask for zero instead.
236 SkScalar radius0 = m_r0 >= 0.0f ? WebCoreFloatToSkScalar(m_r0) : 0; 221 SkScalar radius0 = m_r0 >= 0.0f ? WebCoreFloatToSkScalar(m_r0) : 0;
237 SkScalar radius1 = m_r1 >= 0.0f ? WebCoreFloatToSkScalar(m_r1) : 0; 222 SkScalar radius1 = m_r1 >= 0.0f ? WebCoreFloatToSkScalar(m_r1) : 0;
238 shader = SkGradientShader::MakeTwoPointConical( 223 shader = SkGradientShader::MakeTwoPointConical(
239 m_p0.data(), radius0, m_p1.data(), radius1, colors.data(), pos.data(), 224 m_p0.data(), radius0, m_p1.data(), radius1, colors.data(), pos.data(),
240 static_cast<int>(countUsed), tile, shouldDrawInPMColorSpace, 225 static_cast<int>(countUsed), tile, flags, &adjustedLocalMatrix);
241 &adjustedLocalMatrix);
242 } 226 }
243 } else { 227 } else {
244 SkPoint pts[2] = {m_p0.data(), m_p1.data()}; 228 SkPoint pts[2] = {m_p0.data(), m_p1.data()};
245 shader = SkGradientShader::MakeLinear( 229 shader = SkGradientShader::MakeLinear(pts, colors.data(), pos.data(),
246 pts, colors.data(), pos.data(), static_cast<int>(countUsed), tile, 230 static_cast<int>(countUsed), tile,
247 shouldDrawInPMColorSpace, &localMatrix); 231 flags, &localMatrix);
248 } 232 }
249 233
250 if (!shader) { 234 if (!shader) {
251 // use last color, since our "geometry" was degenerate (e.g. radius==0) 235 // use last color, since our "geometry" was degenerate (e.g. radius==0)
252 shader = SkShader::MakeColorShader(colors[countUsed - 1]); 236 shader = SkShader::MakeColorShader(colors[countUsed - 1]);
253 } 237 }
254 238
255 return WrapSkShader(shader); 239 return WrapSkShader(shader);
256 } 240 }
257 241
258 void Gradient::applyToFlags(PaintFlags& flags, const SkMatrix& localMatrix) { 242 void Gradient::applyToFlags(PaintFlags& flags, const SkMatrix& localMatrix) {
259 if (!m_cachedShader || localMatrix != m_cachedShader->getLocalMatrix()) 243 if (!m_cachedShader || localMatrix != m_cachedShader->getLocalMatrix())
260 m_cachedShader = createShader(localMatrix); 244 m_cachedShader = createShader(localMatrix);
261 245
262 flags.setShader(m_cachedShader); 246 flags.setShader(m_cachedShader);
263 247
264 // Legacy behavior: gradients are always dithered. 248 // Legacy behavior: gradients are always dithered.
265 flags.setDither(true); 249 flags.setDither(true);
266 } 250 }
267 251
268 } // namespace blink 252 } // namespace blink
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