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1 /* | 1 /* |
2 * Copyright 2012 The Android Open Source Project | 2 * Copyright 2012 The Android Open Source Project |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #include "SkBitmap.h" | 8 #include "SkBitmap.h" |
9 #include "SkMagnifierImageFilter.h" | 9 #include "SkMagnifierImageFilter.h" |
10 #include "SkColorPriv.h" | 10 #include "SkColorPriv.h" |
11 #include "SkReadBuffer.h" | 11 #include "SkReadBuffer.h" |
12 #include "SkWriteBuffer.h" | 12 #include "SkWriteBuffer.h" |
13 #include "SkValidationUtils.h" | 13 #include "SkValidationUtils.h" |
14 | 14 |
15 //////////////////////////////////////////////////////////////////////////////// | 15 //////////////////////////////////////////////////////////////////////////////// |
16 #if SK_SUPPORT_GPU | 16 #if SK_SUPPORT_GPU |
17 #include "effects/GrSingleTextureEffect.h" | 17 #include "effects/GrSingleTextureEffect.h" |
18 #include "gl/GrGLEffect.h" | 18 #include "gl/GrGLEffect.h" |
19 #include "gl/GrGLShaderBuilder.h" | 19 #include "gl/builders/GrGLProgramBuilder.h" |
20 #include "gl/GrGLSL.h" | 20 #include "gl/GrGLSL.h" |
21 #include "gl/GrGLTexture.h" | 21 #include "gl/GrGLTexture.h" |
22 #include "GrTBackendEffectFactory.h" | 22 #include "GrTBackendEffectFactory.h" |
23 | 23 |
24 class GrGLMagnifierEffect; | 24 class GrGLMagnifierEffect; |
25 | 25 |
26 class GrMagnifierEffect : public GrSingleTextureEffect { | 26 class GrMagnifierEffect : public GrSingleTextureEffect { |
27 | 27 |
28 public: | 28 public: |
29 static GrEffect* Create(GrTexture* texture, | 29 static GrEffect* Create(GrTexture* texture, |
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88 typedef GrSingleTextureEffect INHERITED; | 88 typedef GrSingleTextureEffect INHERITED; |
89 }; | 89 }; |
90 | 90 |
91 // For brevity | 91 // For brevity |
92 typedef GrGLProgramDataManager::UniformHandle UniformHandle; | 92 typedef GrGLProgramDataManager::UniformHandle UniformHandle; |
93 | 93 |
94 class GrGLMagnifierEffect : public GrGLEffect { | 94 class GrGLMagnifierEffect : public GrGLEffect { |
95 public: | 95 public: |
96 GrGLMagnifierEffect(const GrBackendEffectFactory&, const GrDrawEffect&); | 96 GrGLMagnifierEffect(const GrBackendEffectFactory&, const GrDrawEffect&); |
97 | 97 |
98 virtual void emitCode(GrGLShaderBuilder*, | 98 virtual void emitCode(GrGLProgramBuilder*, |
99 const GrDrawEffect&, | 99 const GrDrawEffect&, |
100 const GrEffectKey&, | 100 const GrEffectKey&, |
101 const char* outputColor, | 101 const char* outputColor, |
102 const char* inputColor, | 102 const char* inputColor, |
103 const TransformedCoordsArray&, | 103 const TransformedCoordsArray&, |
104 const TextureSamplerArray&) SK_OVERRIDE; | 104 const TextureSamplerArray&) SK_OVERRIDE; |
105 | 105 |
106 virtual void setData(const GrGLProgramDataManager&, const GrDrawEffect&) SK_
OVERRIDE; | 106 virtual void setData(const GrGLProgramDataManager&, const GrDrawEffect&) SK_
OVERRIDE; |
107 | 107 |
108 private: | 108 private: |
109 UniformHandle fOffsetVar; | 109 UniformHandle fOffsetVar; |
110 UniformHandle fInvZoomVar; | 110 UniformHandle fInvZoomVar; |
111 UniformHandle fInvInsetVar; | 111 UniformHandle fInvInsetVar; |
112 | 112 |
113 typedef GrGLEffect INHERITED; | 113 typedef GrGLEffect INHERITED; |
114 }; | 114 }; |
115 | 115 |
116 GrGLMagnifierEffect::GrGLMagnifierEffect(const GrBackendEffectFactory& factory,
const GrDrawEffect&) | 116 GrGLMagnifierEffect::GrGLMagnifierEffect(const GrBackendEffectFactory& factory,
const GrDrawEffect&) |
117 : INHERITED(factory) { | 117 : INHERITED(factory) { |
118 } | 118 } |
119 | 119 |
120 void GrGLMagnifierEffect::emitCode(GrGLShaderBuilder* builder, | 120 void GrGLMagnifierEffect::emitCode(GrGLProgramBuilder* builder, |
121 const GrDrawEffect&, | 121 const GrDrawEffect&, |
122 const GrEffectKey& key, | 122 const GrEffectKey& key, |
123 const char* outputColor, | 123 const char* outputColor, |
124 const char* inputColor, | 124 const char* inputColor, |
125 const TransformedCoordsArray& coords, | 125 const TransformedCoordsArray& coords, |
126 const TextureSamplerArray& samplers) { | 126 const TextureSamplerArray& samplers) { |
127 SkString coords2D = builder->ensureFSCoords2D(coords, 0); | |
128 fOffsetVar = builder->addUniform( | 127 fOffsetVar = builder->addUniform( |
129 GrGLShaderBuilder::kFragment_Visibility | | 128 GrGLProgramBuilder::kFragment_Visibility | |
130 GrGLShaderBuilder::kVertex_Visibility, | 129 GrGLProgramBuilder::kVertex_Visibility, |
131 kVec2f_GrSLType, "Offset"); | 130 kVec2f_GrSLType, "Offset"); |
132 fInvZoomVar = builder->addUniform( | 131 fInvZoomVar = builder->addUniform( |
133 GrGLShaderBuilder::kFragment_Visibility | | 132 GrGLProgramBuilder::kFragment_Visibility | |
134 GrGLShaderBuilder::kVertex_Visibility, | 133 GrGLProgramBuilder::kVertex_Visibility, |
135 kVec2f_GrSLType, "InvZoom"); | 134 kVec2f_GrSLType, "InvZoom"); |
136 fInvInsetVar = builder->addUniform( | 135 fInvInsetVar = builder->addUniform( |
137 GrGLShaderBuilder::kFragment_Visibility | | 136 GrGLProgramBuilder::kFragment_Visibility | |
138 GrGLShaderBuilder::kVertex_Visibility, | 137 GrGLProgramBuilder::kVertex_Visibility, |
139 kVec2f_GrSLType, "InvInset"); | 138 kVec2f_GrSLType, "InvInset"); |
140 | 139 |
141 builder->fsCodeAppendf("\t\tvec2 coord = %s;\n", coords2D.c_str()); | 140 GrGLFragmentShaderBuilder* fsBuilder = builder->getFragmentShaderBuilder(); |
142 builder->fsCodeAppendf("\t\tvec2 zoom_coord = %s + %s * %s;\n", | 141 SkString coords2D = fsBuilder->ensureFSCoords2D(coords, 0); |
| 142 fsBuilder->codeAppendf("\t\tvec2 coord = %s;\n", coords2D.c_str()); |
| 143 fsBuilder->codeAppendf("\t\tvec2 zoom_coord = %s + %s * %s;\n", |
143 builder->getUniformCStr(fOffsetVar), | 144 builder->getUniformCStr(fOffsetVar), |
144 coords2D.c_str(), | 145 coords2D.c_str(), |
145 builder->getUniformCStr(fInvZoomVar)); | 146 builder->getUniformCStr(fInvZoomVar)); |
146 | 147 |
147 builder->fsCodeAppend("\t\tvec2 delta = min(coord, vec2(1.0, 1.0) - coord);\
n"); | 148 fsBuilder->codeAppend("\t\tvec2 delta = min(coord, vec2(1.0, 1.0) - coord);\
n"); |
148 | 149 |
149 builder->fsCodeAppendf("\t\tdelta = delta * %s;\n", builder->getUniformCStr(
fInvInsetVar)); | 150 fsBuilder->codeAppendf("\t\tdelta = delta * %s;\n", builder->getUniformCStr(
fInvInsetVar)); |
150 | 151 |
151 builder->fsCodeAppend("\t\tfloat weight = 0.0;\n"); | 152 fsBuilder->codeAppend("\t\tfloat weight = 0.0;\n"); |
152 builder->fsCodeAppend("\t\tif (delta.s < 2.0 && delta.t < 2.0) {\n"); | 153 fsBuilder->codeAppend("\t\tif (delta.s < 2.0 && delta.t < 2.0) {\n"); |
153 builder->fsCodeAppend("\t\t\tdelta = vec2(2.0, 2.0) - delta;\n"); | 154 fsBuilder->codeAppend("\t\t\tdelta = vec2(2.0, 2.0) - delta;\n"); |
154 builder->fsCodeAppend("\t\t\tfloat dist = length(delta);\n"); | 155 fsBuilder->codeAppend("\t\t\tfloat dist = length(delta);\n"); |
155 builder->fsCodeAppend("\t\t\tdist = max(2.0 - dist, 0.0);\n"); | 156 fsBuilder->codeAppend("\t\t\tdist = max(2.0 - dist, 0.0);\n"); |
156 builder->fsCodeAppend("\t\t\tweight = min(dist * dist, 1.0);\n"); | 157 fsBuilder->codeAppend("\t\t\tweight = min(dist * dist, 1.0);\n"); |
157 builder->fsCodeAppend("\t\t} else {\n"); | 158 fsBuilder->codeAppend("\t\t} else {\n"); |
158 builder->fsCodeAppend("\t\t\tvec2 delta_squared = delta * delta;\n"); | 159 fsBuilder->codeAppend("\t\t\tvec2 delta_squared = delta * delta;\n"); |
159 builder->fsCodeAppend("\t\t\tweight = min(min(delta_squared.x, delta_squared
.y), 1.0);\n"); | 160 fsBuilder->codeAppend("\t\t\tweight = min(min(delta_squared.x, delta_squared
.y), 1.0);\n"); |
160 builder->fsCodeAppend("\t\t}\n"); | 161 fsBuilder->codeAppend("\t\t}\n"); |
161 | 162 |
162 builder->fsCodeAppend("\t\tvec2 mix_coord = mix(coord, zoom_coord, weight);\
n"); | 163 fsBuilder->codeAppend("\t\tvec2 mix_coord = mix(coord, zoom_coord, weight);\
n"); |
163 builder->fsCodeAppend("\t\tvec4 output_color = "); | 164 fsBuilder->codeAppend("\t\tvec4 output_color = "); |
164 builder->fsAppendTextureLookup(samplers[0], "mix_coord"); | 165 fsBuilder->appendTextureLookup(samplers[0], "mix_coord"); |
165 builder->fsCodeAppend(";\n"); | 166 fsBuilder->codeAppend(";\n"); |
166 | 167 |
167 builder->fsCodeAppendf("\t\t%s = output_color;", outputColor); | 168 fsBuilder->codeAppendf("\t\t%s = output_color;", outputColor); |
168 SkString modulate; | 169 SkString modulate; |
169 GrGLSLMulVarBy4f(&modulate, 2, outputColor, inputColor); | 170 GrGLSLMulVarBy4f(&modulate, 2, outputColor, inputColor); |
170 builder->fsCodeAppend(modulate.c_str()); | 171 fsBuilder->codeAppend(modulate.c_str()); |
171 } | 172 } |
172 | 173 |
173 void GrGLMagnifierEffect::setData(const GrGLProgramDataManager& pdman, | 174 void GrGLMagnifierEffect::setData(const GrGLProgramDataManager& pdman, |
174 const GrDrawEffect& drawEffect) { | 175 const GrDrawEffect& drawEffect) { |
175 const GrMagnifierEffect& zoom = drawEffect.castEffect<GrMagnifierEffect>(); | 176 const GrMagnifierEffect& zoom = drawEffect.castEffect<GrMagnifierEffect>(); |
176 pdman.set2f(fOffsetVar, zoom.x_offset(), zoom.y_offset()); | 177 pdman.set2f(fOffsetVar, zoom.x_offset(), zoom.y_offset()); |
177 pdman.set2f(fInvZoomVar, zoom.x_inv_zoom(), zoom.y_inv_zoom()); | 178 pdman.set2f(fInvZoomVar, zoom.x_inv_zoom(), zoom.y_inv_zoom()); |
178 pdman.set2f(fInvInsetVar, zoom.x_inv_inset(), zoom.y_inv_inset()); | 179 pdman.set2f(fInvInsetVar, zoom.x_inv_inset(), zoom.y_inv_inset()); |
179 } | 180 } |
180 | 181 |
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363 | 364 |
364 int x_val = SkPin32(SkScalarFloorToInt(x_interp), 0, width - 1); | 365 int x_val = SkPin32(SkScalarFloorToInt(x_interp), 0, width - 1); |
365 int y_val = SkPin32(SkScalarFloorToInt(y_interp), 0, height - 1); | 366 int y_val = SkPin32(SkScalarFloorToInt(y_interp), 0, height - 1); |
366 | 367 |
367 *dptr = sptr[y_val * width + x_val]; | 368 *dptr = sptr[y_val * width + x_val]; |
368 dptr++; | 369 dptr++; |
369 } | 370 } |
370 } | 371 } |
371 return true; | 372 return true; |
372 } | 373 } |
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