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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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920 SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkTwoPointRadialGradient) | 920 SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkTwoPointRadialGradient) |
921 SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkTwoPointConicalGradient) | 921 SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkTwoPointConicalGradient) |
922 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END | 922 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END |
923 | 923 |
924 /////////////////////////////////////////////////////////////////////////////// | 924 /////////////////////////////////////////////////////////////////////////////// |
925 | 925 |
926 #if SK_SUPPORT_GPU | 926 #if SK_SUPPORT_GPU |
927 | 927 |
928 #include "effects/GrTextureStripAtlas.h" | 928 #include "effects/GrTextureStripAtlas.h" |
929 #include "GrTBackendEffectFactory.h" | 929 #include "GrTBackendEffectFactory.h" |
930 #include "gl/GrGLShaderBuilder.h" | 930 #include "gl/builders/GrGLProgramBuilder.h" |
931 #include "SkGr.h" | 931 #include "SkGr.h" |
932 | 932 |
933 GrGLGradientEffect::GrGLGradientEffect(const GrBackendEffectFactory& factory) | 933 GrGLGradientEffect::GrGLGradientEffect(const GrBackendEffectFactory& factory) |
934 : INHERITED(factory) | 934 : INHERITED(factory) |
935 , fCachedYCoord(SK_ScalarMax) { | 935 , fCachedYCoord(SK_ScalarMax) { |
936 } | 936 } |
937 | 937 |
938 GrGLGradientEffect::~GrGLGradientEffect() { } | 938 GrGLGradientEffect::~GrGLGradientEffect() { } |
939 | 939 |
940 void GrGLGradientEffect::emitUniforms(GrGLShaderBuilder* builder, uint32_t baseK
ey) { | 940 void GrGLGradientEffect::emitUniforms(GrGLProgramBuilder* builder, uint32_t base
Key) { |
941 | 941 |
942 if (SkGradientShaderBase::kTwo_GpuColorType == ColorTypeFromKey(baseKey)) {
// 2 Color case | 942 if (SkGradientShaderBase::kTwo_GpuColorType == ColorTypeFromKey(baseKey)) {
// 2 Color case |
943 fColorStartUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibi
lity, | 943 fColorStartUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visib
ility, |
944 kVec4f_GrSLType, "GradientStartColo
r"); | 944 kVec4f_GrSLType, "GradientStartColo
r"); |
945 fColorEndUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibili
ty, | 945 fColorEndUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibil
ity, |
946 kVec4f_GrSLType, "GradientEndColor"); | 946 kVec4f_GrSLType, "GradientEndColor"); |
947 | 947 |
948 } else if (SkGradientShaderBase::kThree_GpuColorType == ColorTypeFromKey(bas
eKey)){ // 3 Color Case | 948 } else if (SkGradientShaderBase::kThree_GpuColorType == ColorTypeFromKey(bas
eKey)){ // 3 Color Case |
949 fColorStartUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibi
lity, | 949 fColorStartUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visib
ility, |
950 kVec4f_GrSLType, "GradientStartColo
r"); | 950 kVec4f_GrSLType, "GradientStartColo
r"); |
951 fColorMidUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibili
ty, | 951 fColorMidUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibil
ity, |
952 kVec4f_GrSLType, "GradientMidColor"); | 952 kVec4f_GrSLType, "GradientMidColor"); |
953 fColorEndUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibili
ty, | 953 fColorEndUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibil
ity, |
954 kVec4f_GrSLType, "GradientEndColor"
); | 954 kVec4f_GrSLType, "GradientEndColor"
); |
955 | 955 |
956 } else { // if not a fast case | 956 } else { // if not a fast case |
957 fFSYUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, | 957 fFSYUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility, |
958 kFloat_GrSLType, "GradientYCoordFS"); | 958 kFloat_GrSLType, "GradientYCoordFS"); |
959 } | 959 } |
960 } | 960 } |
961 | 961 |
962 static inline void set_color_uni(const GrGLProgramDataManager& pdman, | 962 static inline void set_color_uni(const GrGLProgramDataManager& pdman, |
963 const GrGLProgramDataManager::UniformHandle uni
, | 963 const GrGLProgramDataManager::UniformHandle uni
, |
964 const SkColor* color) { | 964 const SkColor* color) { |
965 pdman.set4f(uni, | 965 pdman.set4f(uni, |
966 SkColorGetR(*color) / 255.f, | 966 SkColorGetR(*color) / 255.f, |
967 SkColorGetG(*color) / 255.f, | 967 SkColorGetG(*color) / 255.f, |
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1030 key |= kThreeColorKey; | 1030 key |= kThreeColorKey; |
1031 } | 1031 } |
1032 | 1032 |
1033 if (GrGradientEffect::kBeforeInterp_PremulType == e.getPremulType()) { | 1033 if (GrGradientEffect::kBeforeInterp_PremulType == e.getPremulType()) { |
1034 key |= kPremulBeforeInterpKey; | 1034 key |= kPremulBeforeInterpKey; |
1035 } | 1035 } |
1036 | 1036 |
1037 return key; | 1037 return key; |
1038 } | 1038 } |
1039 | 1039 |
1040 void GrGLGradientEffect::emitColor(GrGLShaderBuilder* builder, | 1040 void GrGLGradientEffect::emitColor(GrGLProgramBuilder* builder, |
1041 const char* gradientTValue, | 1041 const char* gradientTValue, |
1042 uint32_t baseKey, | 1042 uint32_t baseKey, |
1043 const char* outputColor, | 1043 const char* outputColor, |
1044 const char* inputColor, | 1044 const char* inputColor, |
1045 const TextureSamplerArray& samplers) { | 1045 const TextureSamplerArray& samplers) { |
| 1046 GrGLFragmentShaderBuilder* fsBuilder = builder->getFragmentShaderBuilder(); |
1046 if (SkGradientShaderBase::kTwo_GpuColorType == ColorTypeFromKey(baseKey)){ | 1047 if (SkGradientShaderBase::kTwo_GpuColorType == ColorTypeFromKey(baseKey)){ |
1047 builder->fsCodeAppendf("\tvec4 colorTemp = mix(%s, %s, clamp(%s, 0.0, 1.
0));\n", | 1048 fsBuilder->codeAppendf("\tvec4 colorTemp = mix(%s, %s, clamp(%s, 0.0, 1.
0));\n", |
1048 builder->getUniformVariable(fColorStartUni).c_str
(), | 1049 builder->getUniformVariable(fColorStartUni).c_str
(), |
1049 builder->getUniformVariable(fColorEndUni).c_str()
, | 1050 builder->getUniformVariable(fColorEndUni).c_str()
, |
1050 gradientTValue); | 1051 gradientTValue); |
1051 // Note that we could skip this step if both colors are known to be opaq
ue. Two | 1052 // Note that we could skip this step if both colors are known to be opaq
ue. Two |
1052 // considerations: | 1053 // considerations: |
1053 // The gradient SkShader reporting opaque is more restrictive than neces
sary in the two pt | 1054 // The gradient SkShader reporting opaque is more restrictive than neces
sary in the two pt |
1054 // case. Make sure the key reflects this optimization (and note that it
can use the same | 1055 // case. Make sure the key reflects this optimization (and note that it
can use the same |
1055 // shader as thekBeforeIterp case). This same optimization applies to th
e 3 color case below. | 1056 // shader as thekBeforeIterp case). This same optimization applies to th
e 3 color case below. |
1056 if (GrGradientEffect::kAfterInterp_PremulType == PremulTypeFromKey(baseK
ey)) { | 1057 if (GrGradientEffect::kAfterInterp_PremulType == PremulTypeFromKey(baseK
ey)) { |
1057 builder->fsCodeAppend("\tcolorTemp.rgb *= colorTemp.a;\n"); | 1058 fsBuilder->codeAppend("\tcolorTemp.rgb *= colorTemp.a;\n"); |
1058 } | 1059 } |
1059 | 1060 |
1060 builder->fsCodeAppendf("\t%s = %s;\n", outputColor, | 1061 fsBuilder->codeAppendf("\t%s = %s;\n", outputColor, |
1061 (GrGLSLExpr4(inputColor) * GrGLSLExpr4("colorTemp
")).c_str()); | 1062 (GrGLSLExpr4(inputColor) * GrGLSLExpr4("colorTemp
")).c_str()); |
1062 } else if (SkGradientShaderBase::kThree_GpuColorType == ColorTypeFromKey(bas
eKey)){ | 1063 } else if (SkGradientShaderBase::kThree_GpuColorType == ColorTypeFromKey(bas
eKey)){ |
1063 builder->fsCodeAppendf("\tfloat oneMinus2t = 1.0 - (2.0 * (%s));\n", | 1064 fsBuilder->codeAppendf("\tfloat oneMinus2t = 1.0 - (2.0 * (%s));\n", |
1064 gradientTValue); | 1065 gradientTValue); |
1065 builder->fsCodeAppendf("\tvec4 colorTemp = clamp(oneMinus2t, 0.0, 1.0) *
%s;\n", | 1066 fsBuilder->codeAppendf("\tvec4 colorTemp = clamp(oneMinus2t, 0.0, 1.0) *
%s;\n", |
1066 builder->getUniformVariable(fColorStartUni).c_str
()); | 1067 builder->getUniformVariable(fColorStartUni).c_str
()); |
1067 if (kTegra3_GrGLRenderer == builder->ctxInfo().renderer()) { | 1068 if (kTegra3_GrGLRenderer == builder->ctxInfo().renderer()) { |
1068 // The Tegra3 compiler will sometimes never return if we have | 1069 // The Tegra3 compiler will sometimes never return if we have |
1069 // min(abs(oneMinus2t), 1.0), or do the abs first in a separate expr
ession. | 1070 // min(abs(oneMinus2t), 1.0), or do the abs first in a separate expr
ession. |
1070 builder->fsCodeAppend("\tfloat minAbs = abs(oneMinus2t);\n"); | 1071 fsBuilder->codeAppend("\tfloat minAbs = abs(oneMinus2t);\n"); |
1071 builder->fsCodeAppend("\tminAbs = minAbs > 1.0 ? 1.0 : minAbs;\n"); | 1072 fsBuilder->codeAppend("\tminAbs = minAbs > 1.0 ? 1.0 : minAbs;\n"); |
1072 builder->fsCodeAppendf("\tcolorTemp += (1.0 - minAbs) * %s;\n", | 1073 fsBuilder->codeAppendf("\tcolorTemp += (1.0 - minAbs) * %s;\n", |
1073 builder->getUniformVariable(fColorMidUni).c_s
tr()); | 1074 builder->getUniformVariable(fColorMidUni).c_s
tr()); |
1074 } else { | 1075 } else { |
1075 builder->fsCodeAppendf("\tcolorTemp += (1.0 - min(abs(oneMinus2t), 1
.0)) * %s;\n", | 1076 fsBuilder->codeAppendf("\tcolorTemp += (1.0 - min(abs(oneMinus2t), 1
.0)) * %s;\n", |
1076 builder->getUniformVariable(fColorMidUni).c_s
tr()); | 1077 builder->getUniformVariable(fColorMidUni).c_s
tr()); |
1077 } | 1078 } |
1078 builder->fsCodeAppendf("\tcolorTemp += clamp(-oneMinus2t, 0.0, 1.0) * %s
;\n", | 1079 fsBuilder->codeAppendf("\tcolorTemp += clamp(-oneMinus2t, 0.0, 1.0) * %s
;\n", |
1079 builder->getUniformVariable(fColorEndUni).c_str()
); | 1080 builder->getUniformVariable(fColorEndUni).c_str()
); |
1080 if (GrGradientEffect::kAfterInterp_PremulType == PremulTypeFromKey(baseK
ey)) { | 1081 if (GrGradientEffect::kAfterInterp_PremulType == PremulTypeFromKey(baseK
ey)) { |
1081 builder->fsCodeAppend("\tcolorTemp.rgb *= colorTemp.a;\n"); | 1082 fsBuilder->codeAppend("\tcolorTemp.rgb *= colorTemp.a;\n"); |
1082 } | 1083 } |
1083 | 1084 |
1084 builder->fsCodeAppendf("\t%s = %s;\n", outputColor, | 1085 fsBuilder->codeAppendf("\t%s = %s;\n", outputColor, |
1085 (GrGLSLExpr4(inputColor) * GrGLSLExpr4("colorTemp
")).c_str()); | 1086 (GrGLSLExpr4(inputColor) * GrGLSLExpr4("colorTemp
")).c_str()); |
1086 } else { | 1087 } else { |
1087 builder->fsCodeAppendf("\tvec2 coord = vec2(%s, %s);\n", | 1088 fsBuilder->codeAppendf("\tvec2 coord = vec2(%s, %s);\n", |
1088 gradientTValue, | 1089 gradientTValue, |
1089 builder->getUniformVariable(fFSYUni).c_str()); | 1090 builder->getUniformVariable(fFSYUni).c_str()); |
1090 builder->fsCodeAppendf("\t%s = ", outputColor); | 1091 fsBuilder->codeAppendf("\t%s = ", outputColor); |
1091 builder->fsAppendTextureLookupAndModulate(inputColor, | 1092 fsBuilder->appendTextureLookupAndModulate(inputColor, |
1092 samplers[0], | 1093 samplers[0], |
1093 "coord"); | 1094 "coord"); |
1094 builder->fsCodeAppend(";\n"); | 1095 fsBuilder->codeAppend(";\n"); |
1095 } | 1096 } |
1096 } | 1097 } |
1097 | 1098 |
1098 ///////////////////////////////////////////////////////////////////// | 1099 ///////////////////////////////////////////////////////////////////// |
1099 | 1100 |
1100 GrGradientEffect::GrGradientEffect(GrContext* ctx, | 1101 GrGradientEffect::GrGradientEffect(GrContext* ctx, |
1101 const SkGradientShaderBase& shader, | 1102 const SkGradientShaderBase& shader, |
1102 const SkMatrix& matrix, | 1103 const SkMatrix& matrix, |
1103 SkShader::TileMode tileMode) { | 1104 SkShader::TileMode tileMode) { |
1104 | 1105 |
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1223 (*stops)[i] = stop; | 1224 (*stops)[i] = stop; |
1224 stop = i < outColors - 1 ? stop + random->nextUScalar1() * (1.f - st
op) : 1.f; | 1225 stop = i < outColors - 1 ? stop + random->nextUScalar1() * (1.f - st
op) : 1.f; |
1225 } | 1226 } |
1226 } | 1227 } |
1227 *tm = static_cast<SkShader::TileMode>(random->nextULessThan(SkShader::kTileM
odeCount)); | 1228 *tm = static_cast<SkShader::TileMode>(random->nextULessThan(SkShader::kTileM
odeCount)); |
1228 | 1229 |
1229 return outColors; | 1230 return outColors; |
1230 } | 1231 } |
1231 | 1232 |
1232 #endif | 1233 #endif |
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