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1 /* | 1 /* |
2 * Copyright 2014 Google Inc. | 2 * Copyright 2014 Google Inc. |
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 "GrOvalEffect.h" | 8 #include "GrOvalEffect.h" |
9 | 9 |
10 #include "GrFragmentProcessor.h" | 10 #include "GrFragmentProcessor.h" |
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124 const GrFragmentProcessor& fp, | 124 const GrFragmentProcessor& fp, |
125 const char* outputColor, | 125 const char* outputColor, |
126 const char* inputColor, | 126 const char* inputColor, |
127 const TransformedCoordsArray&, | 127 const TransformedCoordsArray&, |
128 const TextureSamplerArray& samplers) { | 128 const TextureSamplerArray& samplers) { |
129 const CircleEffect& ce = fp.cast<CircleEffect>(); | 129 const CircleEffect& ce = fp.cast<CircleEffect>(); |
130 const char *circleName; | 130 const char *circleName; |
131 // The circle uniform is (center.x, center.y, radius + 0.5) for regular fill
s and | 131 // The circle uniform is (center.x, center.y, radius + 0.5) for regular fill
s and |
132 // (... ,radius - 0.5) for inverse fills. | 132 // (... ,radius - 0.5) for inverse fills. |
133 fCircleUniform = builder->addUniform(GrGLProgramBuilder::kFragment_Visibilit
y, | 133 fCircleUniform = builder->addUniform(GrGLProgramBuilder::kFragment_Visibilit
y, |
134 kVec3f_GrSLType, | 134 kVec3f_GrSLType, kDefault_GrSLPrecision
, |
135 "circle", | 135 "circle", |
136 &circleName); | 136 &circleName); |
137 | 137 |
138 GrGLFPFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder(); | 138 GrGLFPFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder(); |
139 const char* fragmentPos = fsBuilder->fragmentPosition(); | 139 const char* fragmentPos = fsBuilder->fragmentPosition(); |
140 | 140 |
141 SkASSERT(kHairlineAA_GrProcessorEdgeType != ce.getEdgeType()); | 141 SkASSERT(kHairlineAA_GrProcessorEdgeType != ce.getEdgeType()); |
142 if (GrProcessorEdgeTypeIsInverseFill(ce.getEdgeType())) { | 142 if (GrProcessorEdgeTypeIsInverseFill(ce.getEdgeType())) { |
143 fsBuilder->codeAppendf("\t\tfloat d = length(%s.xy - %s.xy) - %s.z;\n", | 143 fsBuilder->codeAppendf("\t\tfloat d = length(%s.xy - %s.xy) - %s.z;\n", |
144 circleName, fragmentPos, circleName); | 144 circleName, fragmentPos, circleName); |
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301 void GLEllipseEffect::emitCode(GrGLFPBuilder* builder, | 301 void GLEllipseEffect::emitCode(GrGLFPBuilder* builder, |
302 const GrFragmentProcessor& fp, | 302 const GrFragmentProcessor& fp, |
303 const char* outputColor, | 303 const char* outputColor, |
304 const char* inputColor, | 304 const char* inputColor, |
305 const TransformedCoordsArray&, | 305 const TransformedCoordsArray&, |
306 const TextureSamplerArray& samplers) { | 306 const TextureSamplerArray& samplers) { |
307 const EllipseEffect& ee = fp.cast<EllipseEffect>(); | 307 const EllipseEffect& ee = fp.cast<EllipseEffect>(); |
308 const char *ellipseName; | 308 const char *ellipseName; |
309 // The ellipse uniform is (center.x, center.y, 1 / rx^2, 1 / ry^2) | 309 // The ellipse uniform is (center.x, center.y, 1 / rx^2, 1 / ry^2) |
310 fEllipseUniform = builder->addUniform(GrGLProgramBuilder::kFragment_Visibili
ty, | 310 fEllipseUniform = builder->addUniform(GrGLProgramBuilder::kFragment_Visibili
ty, |
311 kVec4f_GrSLType, | 311 kVec4f_GrSLType, kDefault_GrSLPrecision
, |
312 "ellipse", | 312 "ellipse", |
313 &ellipseName); | 313 &ellipseName); |
314 | 314 |
315 GrGLFPFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder(); | 315 GrGLFPFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder(); |
316 const char* fragmentPos = fsBuilder->fragmentPosition(); | 316 const char* fragmentPos = fsBuilder->fragmentPosition(); |
317 | 317 |
318 // d is the offset to the ellipse center | 318 // d is the offset to the ellipse center |
319 fsBuilder->codeAppendf("\t\tvec2 d = %s.xy - %s.xy;\n", fragmentPos, ellipse
Name); | 319 fsBuilder->codeAppendf("\t\tvec2 d = %s.xy - %s.xy;\n", fragmentPos, ellipse
Name); |
320 fsBuilder->codeAppendf("\t\tvec2 Z = d * %s.zw;\n", ellipseName); | 320 fsBuilder->codeAppendf("\t\tvec2 Z = d * %s.zw;\n", ellipseName); |
321 // implicit is the evaluation of (x/rx)^2 + (y/ry)^2 - 1. | 321 // implicit is the evaluation of (x/rx)^2 + (y/ry)^2 - 1. |
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387 w /= 2; | 387 w /= 2; |
388 return CircleEffect::Create(edgeType, SkPoint::Make(oval.fLeft + w, oval
.fTop + w), w); | 388 return CircleEffect::Create(edgeType, SkPoint::Make(oval.fLeft + w, oval
.fTop + w), w); |
389 } else { | 389 } else { |
390 w /= 2; | 390 w /= 2; |
391 h /= 2; | 391 h /= 2; |
392 return EllipseEffect::Create(edgeType, SkPoint::Make(oval.fLeft + w, ova
l.fTop + h), w, h); | 392 return EllipseEffect::Create(edgeType, SkPoint::Make(oval.fLeft + w, ova
l.fTop + h), w, h); |
393 } | 393 } |
394 | 394 |
395 return NULL; | 395 return NULL; |
396 } | 396 } |
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