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Side by Side Diff: samplecode/SampleLighting.cpp

Issue 1251173002: Added GrGLFragmentProcessor::EmitArgs struct for use with emitCode() (Closed) Base URL: https://skia.googlesource.com/skia@composeshader_gpu
Patch Set: Created 5 years, 5 months ago
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1 1
2 /* 2 /*
3 * Copyright 2015 Google Inc. 3 * Copyright 2015 Google Inc.
4 * 4 *
5 * Use of this source code is governed by a BSD-style license that can be 5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file. 6 * found in the LICENSE file.
7 */ 7 */
8 #include "SampleCode.h" 8 #include "SampleCode.h"
9 #include "Resources.h" 9 #include "Resources.h"
10 10
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122 122
123 this->initClassID<LightingFP>(); 123 this->initClassID<LightingFP>();
124 } 124 }
125 125
126 class LightingGLFP : public GrGLFragmentProcessor { 126 class LightingGLFP : public GrGLFragmentProcessor {
127 public: 127 public:
128 LightingGLFP() : fLightColor(GrColor_ILLEGAL) { 128 LightingGLFP() : fLightColor(GrColor_ILLEGAL) {
129 fLightDir.fX = 10000.0f; 129 fLightDir.fX = 10000.0f;
130 } 130 }
131 131
132 void emitCode(GrGLFPBuilder* builder, 132 void emitCode(EmitArgs& args) override {
133 const GrFragmentProcessor& fp,
134 const char* outputColor,
135 const char* inputColor,
136 const TransformedCoordsArray& coords,
137 const TextureSamplerArray& samplers) override {
138 133
139 GrGLFragmentBuilder* fpb = builder->getFragmentShaderBuilder(); 134 GrGLFragmentBuilder* fpb = args.fBuilder->getFragmentShaderBuilder() ;
140 135
141 // add uniforms 136 // add uniforms
142 const char* lightDirUniName = NULL; 137 const char* lightDirUniName = NULL;
143 fLightDirUni = builder->addUniform(GrGLProgramBuilder::kFragment_Vis ibility, 138 fLightDirUni = args.fBuilder->addUniform(GrGLProgramBuilder::kFragme nt_Visibility,
144 kVec3f_GrSLType, kDefault_GrSLPre cision, 139 kVec3f_GrSLType, kDefault_GrSLPre cision,
145 "LightDir", &lightDirUniName); 140 "LightDir", &lightDirUniName);
146 141
147 const char* lightColorUniName = NULL; 142 const char* lightColorUniName = NULL;
148 fLightColorUni = builder->addUniform(GrGLProgramBuilder::kFragment_V isibility, 143 fLightColorUni = args.fBuilder->addUniform(GrGLProgramBuilder::kFrag ment_Visibility,
149 kVec4f_GrSLType, kDefault_GrSLP recision, 144 kVec4f_GrSLType, kDefault_GrSLP recision,
150 "LightColor", &lightColorUniNam e); 145 "LightColor", &lightColorUniNam e);
151 146
152 const char* ambientColorUniName = NULL; 147 const char* ambientColorUniName = NULL;
153 fAmbientColorUni = builder->addUniform(GrGLProgramBuilder::kFragment _Visibility, 148 fAmbientColorUni = args.fBuilder->addUniform(GrGLProgramBuilder::kFr agment_Visibility,
154 kVec4f_GrSLType, kDefault_GrS LPrecision, 149 kVec4f_GrSLType, kDefault_GrS LPrecision,
155 "AmbientColor", &ambientColor UniName); 150 "AmbientColor", &ambientColor UniName);
156 151
157 fpb->codeAppend("vec4 diffuseColor = "); 152 fpb->codeAppend("vec4 diffuseColor = ");
158 fpb->appendTextureLookupAndModulate(inputColor, samplers[0], 153 fpb->appendTextureLookupAndModulate(args.fInputColor, args.fSamplers [0],
159 coords[0].c_str(), coords[0].get Type()); 154 args.fCoords[0].c_str(), args.fC oords[0].getType());
160 fpb->codeAppend(";"); 155 fpb->codeAppend(";");
161 156
162 fpb->codeAppend("vec4 normalColor = "); 157 fpb->codeAppend("vec4 normalColor = ");
163 fpb->appendTextureLookup(samplers[1], coords[0].c_str(), coords[0].g etType()); 158 fpb->appendTextureLookup(args.fSamplers[1], args.fCoords[0].c_str(),
159 args.fCoords[0].getType());
164 fpb->codeAppend(";"); 160 fpb->codeAppend(";");
165 161
166 fpb->codeAppend("vec3 normal = normalize(2.0*(normalColor.rgb - vec3 (0.5)));"); 162 fpb->codeAppend("vec3 normal = normalize(2.0*(normalColor.rgb - vec3 (0.5)));");
167 fpb->codeAppendf("vec3 lightDir = normalize(%s);", lightDirUniName); 163 fpb->codeAppendf("vec3 lightDir = normalize(%s);", lightDirUniName);
168 fpb->codeAppend("float NdotL = dot(normal, lightDir);"); 164 fpb->codeAppend("float NdotL = dot(normal, lightDir);");
169 // diffuse light 165 // diffuse light
170 fpb->codeAppendf("vec3 result = %s.rgb*diffuseColor.rgb*NdotL;", lig htColorUniName); 166 fpb->codeAppendf("vec3 result = %s.rgb*diffuseColor.rgb*NdotL;", lig htColorUniName);
171 // ambient light 167 // ambient light
172 fpb->codeAppendf("result += %s.rgb;", ambientColorUniName); 168 fpb->codeAppendf("result += %s.rgb;", ambientColorUniName);
173 fpb->codeAppendf("%s = vec4(result.rgb, diffuseColor.a);", outputCol or); 169 fpb->codeAppendf("%s = vec4(result.rgb, diffuseColor.a);", args.fOut putColor);
174 } 170 }
175 171
176 void setData(const GrGLProgramDataManager& pdman, const GrProcessor& pro c) override { 172 void setData(const GrGLProgramDataManager& pdman, const GrProcessor& pro c) override {
177 const LightingFP& lightingFP = proc.cast<LightingFP>(); 173 const LightingFP& lightingFP = proc.cast<LightingFP>();
178 174
179 SkVector3 lightDir = lightingFP.lightDir(); 175 SkVector3 lightDir = lightingFP.lightDir();
180 if (lightDir != fLightDir) { 176 if (lightDir != fLightDir) {
181 pdman.set3fv(fLightDirUni, 1, &lightDir.fX); 177 pdman.set3fv(fLightDirUni, 1, &lightDir.fX);
182 fLightDir = lightDir; 178 fLightDir = lightDir;
183 } 179 }
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409 } 405 }
410 406
411 private: 407 private:
412 typedef SampleView INHERITED; 408 typedef SampleView INHERITED;
413 }; 409 };
414 410
415 ////////////////////////////////////////////////////////////////////////////// 411 //////////////////////////////////////////////////////////////////////////////
416 412
417 static SkView* MyFactory() { return new LightingView; } 413 static SkView* MyFactory() { return new LightingView; }
418 static SkViewRegister reg(MyFactory); 414 static SkViewRegister reg(MyFactory);
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