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1 /* | 1 /* |
2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 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 "GrDistanceFieldTextureEffect.h" | 8 #include "GrDistanceFieldTextureEffect.h" |
9 #include "gl/builders/GrGLFullProgramBuilder.h" | 9 #include "gl/builders/GrGLProgramBuilder.h" |
10 #include "gl/GrGLProcessor.h" | 10 #include "gl/GrGLProcessor.h" |
11 #include "gl/GrGLSL.h" | 11 #include "gl/GrGLSL.h" |
12 #include "gl/GrGLTexture.h" | 12 #include "gl/GrGLTexture.h" |
13 #include "gl/GrGLGeometryProcessor.h" | 13 #include "gl/GrGLGeometryProcessor.h" |
14 #include "GrTBackendProcessorFactory.h" | 14 #include "GrTBackendProcessorFactory.h" |
15 #include "GrTexture.h" | 15 #include "GrTexture.h" |
16 | 16 |
17 #include "SkDistanceFieldGen.h" | 17 #include "SkDistanceFieldGen.h" |
18 | 18 |
19 // To get optical sizes people don't complain about when we blit correctly, | 19 // To get optical sizes people don't complain about when we blit correctly, |
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33 public: | 33 public: |
34 GrGLDistanceFieldTextureEffect(const GrBackendProcessorFactory& factory, | 34 GrGLDistanceFieldTextureEffect(const GrBackendProcessorFactory& factory, |
35 const GrProcessor&) | 35 const GrProcessor&) |
36 : INHERITED (factory) | 36 : INHERITED (factory) |
37 , fTextureSize(SkISize::Make(-1,-1)) | 37 , fTextureSize(SkISize::Make(-1,-1)) |
38 #ifdef SK_GAMMA_APPLY_TO_A8 | 38 #ifdef SK_GAMMA_APPLY_TO_A8 |
39 , fLuminance(-1.0f) | 39 , fLuminance(-1.0f) |
40 #endif | 40 #endif |
41 {} | 41 {} |
42 | 42 |
43 virtual void emitCode(GrGLFullProgramBuilder* builder, | 43 virtual void emitCode(GrGLGPBuilder* builder, |
44 const GrGeometryProcessor& geometryProcessor, | 44 const GrGeometryProcessor& geometryProcessor, |
45 const GrProcessorKey& key, | 45 const GrProcessorKey& key, |
46 const char* outputColor, | 46 const char* outputColor, |
47 const char* inputColor, | 47 const char* inputColor, |
48 const TransformedCoordsArray&, | 48 const TransformedCoordsArray&, |
49 const TextureSamplerArray& samplers) SK_OVERRIDE { | 49 const TextureSamplerArray& samplers) SK_OVERRIDE { |
50 const GrDistanceFieldTextureEffect& dfTexEffect = | 50 const GrDistanceFieldTextureEffect& dfTexEffect = |
51 geometryProcessor.cast<GrDistanceFieldTextureEffect>(); | 51 geometryProcessor.cast<GrDistanceFieldTextureEffect>(); |
52 SkASSERT(1 == dfTexEffect.getVertexAttribs().count()); | 52 SkASSERT(1 == dfTexEffect.getVertexAttribs().count()); |
53 | 53 |
54 GrGLProcessorFragmentShaderBuilder* fsBuilder = builder->getFragmentShad
erBuilder(); | 54 GrGLGPFragmentShaderBuilder* fsBuilder = builder->getFragmentShaderBuild
er(); |
55 SkAssertResult(fsBuilder->enableFeature( | 55 SkAssertResult(fsBuilder->enableFeature( |
56 GrGLFragmentShaderBuilder::kStandardDerivatives_GLSLFeature)); | 56 GrGLFragmentShaderBuilder::kStandardDerivatives_GLSLFeature)); |
57 | 57 |
58 SkString fsCoordName; | 58 SkString fsCoordName; |
59 const char* vsCoordName; | 59 const char* vsCoordName; |
60 const char* fsCoordNamePtr; | 60 const char* fsCoordNamePtr; |
61 builder->addVarying(kVec2f_GrSLType, "textureCoords", &vsCoordName, &fsC
oordNamePtr); | 61 builder->addVarying(kVec2f_GrSLType, "textureCoords", &vsCoordName, &fsC
oordNamePtr); |
62 fsCoordName = fsCoordNamePtr; | 62 fsCoordName = fsCoordNamePtr; |
63 | 63 |
64 GrGLVertexShaderBuilder* vsBuilder = builder->getVertexShaderBuilder(); | 64 GrGLVertexShaderBuilder* vsBuilder = builder->getVertexShaderBuilder(); |
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262 /////////////////////////////////////////////////////////////////////////////// | 262 /////////////////////////////////////////////////////////////////////////////// |
263 | 263 |
264 class GrGLDistanceFieldLCDTextureEffect : public GrGLGeometryProcessor { | 264 class GrGLDistanceFieldLCDTextureEffect : public GrGLGeometryProcessor { |
265 public: | 265 public: |
266 GrGLDistanceFieldLCDTextureEffect(const GrBackendProcessorFactory& factory, | 266 GrGLDistanceFieldLCDTextureEffect(const GrBackendProcessorFactory& factory, |
267 const GrProcessor&) | 267 const GrProcessor&) |
268 : INHERITED (factory) | 268 : INHERITED (factory) |
269 , fTextureSize(SkISize::Make(-1,-1)) | 269 , fTextureSize(SkISize::Make(-1,-1)) |
270 , fTextColor(GrColor_ILLEGAL) {} | 270 , fTextColor(GrColor_ILLEGAL) {} |
271 | 271 |
272 virtual void emitCode(GrGLFullProgramBuilder* builder, | 272 virtual void emitCode(GrGLGPBuilder* builder, |
273 const GrGeometryProcessor& geometryProcessor, | 273 const GrGeometryProcessor& geometryProcessor, |
274 const GrProcessorKey& key, | 274 const GrProcessorKey& key, |
275 const char* outputColor, | 275 const char* outputColor, |
276 const char* inputColor, | 276 const char* inputColor, |
277 const TransformedCoordsArray&, | 277 const TransformedCoordsArray&, |
278 const TextureSamplerArray& samplers) SK_OVERRIDE { | 278 const TextureSamplerArray& samplers) SK_OVERRIDE { |
279 const GrDistanceFieldLCDTextureEffect& dfTexEffect = | 279 const GrDistanceFieldLCDTextureEffect& dfTexEffect = |
280 geometryProcessor.cast<GrDistanceFieldLCDTextureEffect>(); | 280 geometryProcessor.cast<GrDistanceFieldLCDTextureEffect>(); |
281 SkASSERT(1 == dfTexEffect.getVertexAttribs().count()); | 281 SkASSERT(1 == dfTexEffect.getVertexAttribs().count()); |
282 | 282 |
283 SkString fsCoordName; | 283 SkString fsCoordName; |
284 const char* vsCoordName; | 284 const char* vsCoordName; |
285 const char* fsCoordNamePtr; | 285 const char* fsCoordNamePtr; |
286 builder->addVarying(kVec2f_GrSLType, "textureCoords", &vsCoordName, &fsC
oordNamePtr); | 286 builder->addVarying(kVec2f_GrSLType, "textureCoords", &vsCoordName, &fsC
oordNamePtr); |
287 fsCoordName = fsCoordNamePtr; | 287 fsCoordName = fsCoordNamePtr; |
288 | 288 |
289 GrGLVertexShaderBuilder* vsBuilder = builder->getVertexShaderBuilder(); | 289 GrGLVertexShaderBuilder* vsBuilder = builder->getVertexShaderBuilder(); |
290 vsBuilder->codeAppendf("\t%s = %s;\n", vsCoordName, dfTexEffect.inTextur
eCoords().c_str()); | 290 vsBuilder->codeAppendf("\t%s = %s;\n", vsCoordName, dfTexEffect.inTextur
eCoords().c_str()); |
291 | 291 |
292 const char* textureSizeUniName = NULL; | 292 const char* textureSizeUniName = NULL; |
293 // width, height, 1/(3*width) | 293 // width, height, 1/(3*width) |
294 fTextureSizeUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visi
bility, | 294 fTextureSizeUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visi
bility, |
295 kVec3f_GrSLType, "TextureSize", | 295 kVec3f_GrSLType, "TextureSize", |
296 &textureSizeUniName); | 296 &textureSizeUniName); |
297 | 297 |
298 GrGLProcessorFragmentShaderBuilder* fsBuilder = builder->getFragmentShad
erBuilder(); | 298 GrGLGPFragmentShaderBuilder* fsBuilder = builder->getFragmentShaderBuild
er(); |
299 | 299 |
300 SkAssertResult(fsBuilder->enableFeature( | 300 SkAssertResult(fsBuilder->enableFeature( |
301 GrGLFragmentShaderBuilder::kStandardDerivatives_GLSLFeature)); | 301 GrGLFragmentShaderBuilder::kStandardDerivatives_GLSLFeature)); |
302 | 302 |
303 // create LCD offset adjusted by inverse of transform | 303 // create LCD offset adjusted by inverse of transform |
304 fsBuilder->codeAppendf("\tvec2 uv = %s;\n", fsCoordName.c_str()); | 304 fsBuilder->codeAppendf("\tvec2 uv = %s;\n", fsCoordName.c_str()); |
305 fsBuilder->codeAppendf("\tvec2 st = uv*%s.xy;\n", textureSizeUniName); | 305 fsBuilder->codeAppendf("\tvec2 st = uv*%s.xy;\n", textureSizeUniName); |
306 bool isUniformScale = !!(dfTexEffect.getFlags() & kUniformScale_Distance
FieldEffectMask); | 306 bool isUniformScale = !!(dfTexEffect.getFlags() & kUniformScale_Distance
FieldEffectMask); |
307 if (isUniformScale) { | 307 if (isUniformScale) { |
308 fsBuilder->codeAppend("\tfloat dx = dFdx(st.x);\n"); | 308 fsBuilder->codeAppend("\tfloat dx = dFdx(st.x);\n"); |
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520 random->nextULessThan(256), | 520 random->nextULessThan(256), |
521 random->nextULessThan(256)); | 521 random->nextULessThan(256)); |
522 uint32_t flags = kUseLCD_DistanceFieldEffectFlag; | 522 uint32_t flags = kUseLCD_DistanceFieldEffectFlag; |
523 flags |= random->nextBool() ? kUniformScale_DistanceFieldEffectMask : 0; | 523 flags |= random->nextBool() ? kUniformScale_DistanceFieldEffectMask : 0; |
524 flags |= random->nextBool() ? kBGR_DistanceFieldEffectFlag : 0; | 524 flags |= random->nextBool() ? kBGR_DistanceFieldEffectFlag : 0; |
525 return GrDistanceFieldLCDTextureEffect::Create(textures[texIdx], params, | 525 return GrDistanceFieldLCDTextureEffect::Create(textures[texIdx], params, |
526 textures[texIdx2], params2, | 526 textures[texIdx2], params2, |
527 textColor, | 527 textColor, |
528 flags); | 528 flags); |
529 } | 529 } |
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