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1 /* | 1 /* |
2 * Copyright 2006 The Android Open Source Project | 2 * Copyright 2006 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 "SkGradientShaderPriv.h" | 8 #include "SkGradientShaderPriv.h" |
9 #include "SkLinearGradient.h" | 9 #include "SkLinearGradient.h" |
10 #include "SkRadialGradient.h" | 10 #include "SkRadialGradient.h" |
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950 #include "gl/builders/GrGLProgramBuilder.h" | 950 #include "gl/builders/GrGLProgramBuilder.h" |
951 #include "SkGr.h" | 951 #include "SkGr.h" |
952 | 952 |
953 GrGLGradientEffect::GrGLGradientEffect(const GrBackendProcessorFactory& factory) | 953 GrGLGradientEffect::GrGLGradientEffect(const GrBackendProcessorFactory& factory) |
954 : INHERITED(factory) | 954 : INHERITED(factory) |
955 , fCachedYCoord(SK_ScalarMax) { | 955 , fCachedYCoord(SK_ScalarMax) { |
956 } | 956 } |
957 | 957 |
958 GrGLGradientEffect::~GrGLGradientEffect() { } | 958 GrGLGradientEffect::~GrGLGradientEffect() { } |
959 | 959 |
960 void GrGLGradientEffect::emitUniforms(GrGLFPBuilder* builder, uint32_t baseKey) { | 960 void GrGLGradientEffect::emitUniforms(GrGLFPBuilder* builder, const GrGradientEf fect& ge) { |
961 | 961 |
962 if (SkGradientShaderBase::kTwo_GpuColorType == ColorTypeFromKey(baseKey)) { // 2 Color case | 962 if (SkGradientShaderBase::kTwo_GpuColorType == ge.getColorType()) { // 2 Col or case |
963 fColorStartUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visib ility, | 963 fColorStartUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visib ility, |
964 kVec4f_GrSLType, "GradientStartColo r"); | 964 kVec4f_GrSLType, "GradientStartColo r"); |
965 fColorEndUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibil ity, | 965 fColorEndUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibil ity, |
966 kVec4f_GrSLType, "GradientEndColor"); | 966 kVec4f_GrSLType, "GradientEndColor"); |
967 | 967 |
968 } else if (SkGradientShaderBase::kThree_GpuColorType == ColorTypeFromKey(bas eKey)){ // 3 Color Case | 968 } else if (SkGradientShaderBase::kThree_GpuColorType == ge.getColorType()) { // 3 Color Case |
969 fColorStartUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visib ility, | 969 fColorStartUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visib ility, |
970 kVec4f_GrSLType, "GradientStartColo r"); | 970 kVec4f_GrSLType, "GradientStartColo r"); |
971 fColorMidUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibil ity, | 971 fColorMidUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibil ity, |
972 kVec4f_GrSLType, "GradientMidColor"); | 972 kVec4f_GrSLType, "GradientMidColor"); |
973 fColorEndUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibil ity, | 973 fColorEndUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibil ity, |
974 kVec4f_GrSLType, "GradientEndColor" ); | 974 kVec4f_GrSLType, "GradientEndColor" ); |
975 | 975 |
976 } else { // if not a fast case | 976 } else { // if not a fast case |
977 fFSYUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility, | 977 fFSYUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility, |
978 kFloat_GrSLType, "GradientYCoordFS"); | 978 kFloat_GrSLType, "GradientYCoordFS"); |
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1051 } | 1051 } |
1052 | 1052 |
1053 if (GrGradientEffect::kBeforeInterp_PremulType == e.getPremulType()) { | 1053 if (GrGradientEffect::kBeforeInterp_PremulType == e.getPremulType()) { |
1054 key |= kPremulBeforeInterpKey; | 1054 key |= kPremulBeforeInterpKey; |
1055 } | 1055 } |
1056 | 1056 |
1057 return key; | 1057 return key; |
1058 } | 1058 } |
1059 | 1059 |
1060 void GrGLGradientEffect::emitColor(GrGLFPBuilder* builder, | 1060 void GrGLGradientEffect::emitColor(GrGLFPBuilder* builder, |
1061 const GrGradientEffect& ge, | |
1061 const char* gradientTValue, | 1062 const char* gradientTValue, |
1062 uint32_t baseKey, | |
1063 const char* outputColor, | 1063 const char* outputColor, |
1064 const char* inputColor, | 1064 const char* inputColor, |
1065 const TextureSamplerArray& samplers) { | 1065 const TextureSamplerArray& samplers) { |
1066 GrGLFPFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder(); | 1066 GrGLFPFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder(); |
1067 if (SkGradientShaderBase::kTwo_GpuColorType == ColorTypeFromKey(baseKey)){ | 1067 if (SkGradientShaderBase::kTwo_GpuColorType == ge.getColorType()){ |
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1068 fsBuilder->codeAppendf("\tvec4 colorTemp = mix(%s, %s, clamp(%s, 0.0, 1. 0));\n", | 1068 fsBuilder->codeAppendf("\tvec4 colorTemp = mix(%s, %s, clamp(%s, 0.0, 1. 0));\n", |
1069 builder->getUniformVariable(fColorStartUni).c_str (), | 1069 builder->getUniformVariable(fColorStartUni).c_str (), |
1070 builder->getUniformVariable(fColorEndUni).c_str() , | 1070 builder->getUniformVariable(fColorEndUni).c_str() , |
1071 gradientTValue); | 1071 gradientTValue); |
1072 // Note that we could skip this step if both colors are known to be opaq ue. Two | 1072 // Note that we could skip this step if both colors are known to be opaq ue. Two |
1073 // considerations: | 1073 // considerations: |
1074 // The gradient SkShader reporting opaque is more restrictive than neces sary in the two pt | 1074 // The gradient SkShader reporting opaque is more restrictive than neces sary in the two pt |
1075 // case. Make sure the key reflects this optimization (and note that it can use the same | 1075 // case. Make sure the key reflects this optimization (and note that it can use the same |
1076 // shader as thekBeforeIterp case). This same optimization applies to th e 3 color case below. | 1076 // shader as thekBeforeIterp case). This same optimization applies to th e 3 color case below. |
1077 if (GrGradientEffect::kAfterInterp_PremulType == PremulTypeFromKey(baseK ey)) { | 1077 if (GrGradientEffect::kAfterInterp_PremulType == ge.getPremulType()) { |
1078 fsBuilder->codeAppend("\tcolorTemp.rgb *= colorTemp.a;\n"); | 1078 fsBuilder->codeAppend("\tcolorTemp.rgb *= colorTemp.a;\n"); |
1079 } | 1079 } |
1080 | 1080 |
1081 fsBuilder->codeAppendf("\t%s = %s;\n", outputColor, | 1081 fsBuilder->codeAppendf("\t%s = %s;\n", outputColor, |
1082 (GrGLSLExpr4(inputColor) * GrGLSLExpr4("colorTemp ")).c_str()); | 1082 (GrGLSLExpr4(inputColor) * GrGLSLExpr4("colorTemp ")).c_str()); |
1083 } else if (SkGradientShaderBase::kThree_GpuColorType == ColorTypeFromKey(bas eKey)){ | 1083 } else if (SkGradientShaderBase::kThree_GpuColorType == ge.getColorType()) { |
1084 fsBuilder->codeAppendf("\tfloat oneMinus2t = 1.0 - (2.0 * (%s));\n", | 1084 fsBuilder->codeAppendf("\tfloat oneMinus2t = 1.0 - (2.0 * (%s));\n", |
1085 gradientTValue); | 1085 gradientTValue); |
1086 fsBuilder->codeAppendf("\tvec4 colorTemp = clamp(oneMinus2t, 0.0, 1.0) * %s;\n", | 1086 fsBuilder->codeAppendf("\tvec4 colorTemp = clamp(oneMinus2t, 0.0, 1.0) * %s;\n", |
1087 builder->getUniformVariable(fColorStartUni).c_str ()); | 1087 builder->getUniformVariable(fColorStartUni).c_str ()); |
1088 if (kTegra3_GrGLRenderer == builder->ctxInfo().renderer()) { | 1088 if (kTegra3_GrGLRenderer == builder->ctxInfo().renderer()) { |
1089 // The Tegra3 compiler will sometimes never return if we have | 1089 // The Tegra3 compiler will sometimes never return if we have |
1090 // min(abs(oneMinus2t), 1.0), or do the abs first in a separate expr ession. | 1090 // min(abs(oneMinus2t), 1.0), or do the abs first in a separate expr ession. |
1091 fsBuilder->codeAppend("\tfloat minAbs = abs(oneMinus2t);\n"); | 1091 fsBuilder->codeAppend("\tfloat minAbs = abs(oneMinus2t);\n"); |
1092 fsBuilder->codeAppend("\tminAbs = minAbs > 1.0 ? 1.0 : minAbs;\n"); | 1092 fsBuilder->codeAppend("\tminAbs = minAbs > 1.0 ? 1.0 : minAbs;\n"); |
1093 fsBuilder->codeAppendf("\tcolorTemp += (1.0 - minAbs) * %s;\n", | 1093 fsBuilder->codeAppendf("\tcolorTemp += (1.0 - minAbs) * %s;\n", |
1094 builder->getUniformVariable(fColorMidUni).c_s tr()); | 1094 builder->getUniformVariable(fColorMidUni).c_s tr()); |
1095 } else { | 1095 } else { |
1096 fsBuilder->codeAppendf("\tcolorTemp += (1.0 - min(abs(oneMinus2t), 1 .0)) * %s;\n", | 1096 fsBuilder->codeAppendf("\tcolorTemp += (1.0 - min(abs(oneMinus2t), 1 .0)) * %s;\n", |
1097 builder->getUniformVariable(fColorMidUni).c_s tr()); | 1097 builder->getUniformVariable(fColorMidUni).c_s tr()); |
1098 } | 1098 } |
1099 fsBuilder->codeAppendf("\tcolorTemp += clamp(-oneMinus2t, 0.0, 1.0) * %s ;\n", | 1099 fsBuilder->codeAppendf("\tcolorTemp += clamp(-oneMinus2t, 0.0, 1.0) * %s ;\n", |
1100 builder->getUniformVariable(fColorEndUni).c_str() ); | 1100 builder->getUniformVariable(fColorEndUni).c_str() ); |
1101 if (GrGradientEffect::kAfterInterp_PremulType == PremulTypeFromKey(baseK ey)) { | 1101 if (GrGradientEffect::kAfterInterp_PremulType == ge.getPremulType()) { |
1102 fsBuilder->codeAppend("\tcolorTemp.rgb *= colorTemp.a;\n"); | 1102 fsBuilder->codeAppend("\tcolorTemp.rgb *= colorTemp.a;\n"); |
1103 } | 1103 } |
1104 | 1104 |
1105 fsBuilder->codeAppendf("\t%s = %s;\n", outputColor, | 1105 fsBuilder->codeAppendf("\t%s = %s;\n", outputColor, |
1106 (GrGLSLExpr4(inputColor) * GrGLSLExpr4("colorTemp ")).c_str()); | 1106 (GrGLSLExpr4(inputColor) * GrGLSLExpr4("colorTemp ")).c_str()); |
1107 } else { | 1107 } else { |
1108 fsBuilder->codeAppendf("\tvec2 coord = vec2(%s, %s);\n", | 1108 fsBuilder->codeAppendf("\tvec2 coord = vec2(%s, %s);\n", |
1109 gradientTValue, | 1109 gradientTValue, |
1110 builder->getUniformVariable(fFSYUni).c_str()); | 1110 builder->getUniformVariable(fFSYUni).c_str()); |
1111 fsBuilder->codeAppendf("\t%s = ", outputColor); | 1111 fsBuilder->codeAppendf("\t%s = ", outputColor); |
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1235 (*stops)[i] = stop; | 1235 (*stops)[i] = stop; |
1236 stop = i < outColors - 1 ? stop + random->nextUScalar1() * (1.f - st op) : 1.f; | 1236 stop = i < outColors - 1 ? stop + random->nextUScalar1() * (1.f - st op) : 1.f; |
1237 } | 1237 } |
1238 } | 1238 } |
1239 *tm = static_cast<SkShader::TileMode>(random->nextULessThan(SkShader::kTileM odeCount)); | 1239 *tm = static_cast<SkShader::TileMode>(random->nextULessThan(SkShader::kTileM odeCount)); |
1240 | 1240 |
1241 return outColors; | 1241 return outColors; |
1242 } | 1242 } |
1243 | 1243 |
1244 #endif | 1244 #endif |
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