Added GrGLFragmentProcessor::EmitArgs struct for use with emitCode()

src/gpu/effects/GrBicubicEffect.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrBicubicEffect.h"
 #include "GrInvariantOutput.h"
 #include "gl/builders/GrGLProgramBuilder.h"
 
 #define DS(x) SkDoubleToScalar(x)
 
 const SkScalar GrBicubicEffect::gMitchellCoefficients[16] = {
     DS( 1.0 / 18.0), DS(-9.0 / 18.0), DS( 15.0 / 18.0), DS( -7.0 / 18.0),
     DS(16.0 / 18.0), DS( 0.0 / 18.0), DS(-36.0 / 18.0), DS( 21.0 / 18.0),
     DS( 1.0 / 18.0), DS( 9.0 / 18.0), DS( 27.0 / 18.0), DS(-21.0 / 18.0),
     DS( 0.0 / 18.0), DS( 0.0 / 18.0), DS( -6.0 / 18.0), DS(  7.0 / 18.0),
 };
 
 
 class GrGLBicubicEffect : public GrGLFragmentProcessor {
 public:
     GrGLBicubicEffect(const GrProcessor&);
 
-    virtual void emitCode(GrGLFPBuilder*,
-                          const GrFragmentProcessor&,
-                          const char* outputColor,
-                          const char* inputColor,
-                          const TransformedCoordsArray&,
-                          const TextureSamplerArray&) override;
+    virtual void emitCode(EmitArgs&) override;
 
     void setData(const GrGLProgramDataManager&, const GrProcessor&) override;
 
     static inline void GenKey(const GrProcessor& effect, const GrGLSLCaps&,
                               GrProcessorKeyBuilder* b) {
         const GrTextureDomain& domain = effect.cast<GrBicubicEffect>().domain();
         b->add32(GrTextureDomain::GLDomain::DomainKey(domain));
     }
 
 private:
     typedef GrGLProgramDataManager::UniformHandle UniformHandle;
 
     UniformHandle               fCoefficientsUni;
     UniformHandle               fImageIncrementUni;
     GrTextureDomain::GLDomain   fDomain;
 
     typedef GrGLFragmentProcessor INHERITED;
 };
 
 GrGLBicubicEffect::GrGLBicubicEffect(const GrProcessor&) {
 }
 
-void GrGLBicubicEffect::emitCode(GrGLFPBuilder* builder,
-                                 const GrFragmentProcessor& effect,
-                                 const char* outputColor,
-                                 const char* inputColor,
-                                 const TransformedCoordsArray& coords,
-                                 const TextureSamplerArray& samplers) {
-    const GrTextureDomain& domain = effect.cast<GrBicubicEffect>().domain();
+void GrGLBicubicEffect::emitCode(EmitArgs& args) {
+    const GrTextureDomain& domain = args.fFp.cast<GrBicubicEffect>().domain();
 
-    fCoefficientsUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
+    fCoefficientsUni = args.fBuilder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
                                            kMat44f_GrSLType, kDefault_GrSLPrecision,
                                            "Coefficients");
-    fImageIncrementUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
+    fImageIncrementUni = args.fBuilder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
                                              kVec2f_GrSLType, kDefault_GrSLPrecision,
                                              "ImageIncrement");
 
-    const char* imgInc = builder->getUniformCStr(fImageIncrementUni);
-    const char* coeff = builder->getUniformCStr(fCoefficientsUni);
+    const char* imgInc = args.fBuilder->getUniformCStr(fImageIncrementUni);
+    const char* coeff = args.fBuilder->getUniformCStr(fCoefficientsUni);
 
     SkString cubicBlendName;
 
     static const GrGLShaderVar gCubicBlendArgs[] = {
         GrGLShaderVar("coefficients",  kMat44f_GrSLType),
         GrGLShaderVar("t",             kFloat_GrSLType),
         GrGLShaderVar("c0",            kVec4f_GrSLType),
         GrGLShaderVar("c1",            kVec4f_GrSLType),
         GrGLShaderVar("c2",            kVec4f_GrSLType),
         GrGLShaderVar("c3",            kVec4f_GrSLType),
     };
-    GrGLFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder();
-    SkString coords2D = fsBuilder->ensureFSCoords2D(coords, 0);
+    GrGLFragmentBuilder* fsBuilder = args.fBuilder->getFragmentShaderBuilder();
+    SkString coords2D = fsBuilder->ensureFSCoords2D(args.fCoords, 0);
     fsBuilder->emitFunction(kVec4f_GrSLType,
                             "cubicBlend",
                             SK_ARRAY_COUNT(gCubicBlendArgs),
                             gCubicBlendArgs,
                             "\tvec4 ts = vec4(1.0, t, t * t, t * t * t);\n"
                             "\tvec4 c = coefficients * ts;\n"
                             "\treturn c.x * c0 + c.y * c1 + c.z * c2 + c.w * c3;\n",
                             &cubicBlendName);
     fsBuilder->codeAppendf("\tvec2 coord = %s - %s * vec2(0.5);\n", coords2D.c_str(), imgInc);
     // We unnormalize the coord in order to determine our fractional offset (f) within the texel
     // We then snap coord to a texel center and renormalize. The snap prevents cases where the
     // starting coords are near a texel boundary and accumulations of imgInc would cause us to skip/
     // double hit a texel.
     fsBuilder->codeAppendf("\tcoord /= %s;\n", imgInc);
     fsBuilder->codeAppend("\tvec2 f = fract(coord);\n");
     fsBuilder->codeAppendf("\tcoord = (coord - f + vec2(0.5)) * %s;\n", imgInc);
     fsBuilder->codeAppend("\tvec4 rowColors[4];\n");
     for (int y = 0; y < 4; ++y) {
         for (int x = 0; x < 4; ++x) {
             SkString coord;
             coord.printf("coord + %s * vec2(%d, %d)", imgInc, x - 1, y - 1);
             SkString sampleVar;
             sampleVar.printf("rowColors[%d]", x);
-            fDomain.sampleTexture(fsBuilder, domain, sampleVar.c_str(), coord, samplers[0]);
+            fDomain.sampleTexture(fsBuilder, domain, sampleVar.c_str(), coord, args.fSamplers[0]);
         }
         fsBuilder->codeAppendf("\tvec4 s%d = %s(%s, f.x, rowColors[0], rowColors[1], rowColors[2], rowColors[3]);\n", y, cubicBlendName.c_str(), coeff);
     }
     SkString bicubicColor;
     bicubicColor.printf("%s(%s, f.y, s0, s1, s2, s3)", cubicBlendName.c_str(), coeff);
-    fsBuilder->codeAppendf("\t%s = %s;\n", outputColor, (GrGLSLExpr4(bicubicColor.c_str()) * GrGLSLExpr4(inputColor)).c_str());
+    fsBuilder->codeAppendf("\t%s = %s;\n", args.fOutputColor,(GrGLSLExpr4(bicubicColor.c_str()) *
+                           GrGLSLExpr4(args.fInputColor)).c_str());
 }
 
 void GrGLBicubicEffect::setData(const GrGLProgramDataManager& pdman,
                                 const GrProcessor& processor) {
     const GrBicubicEffect& bicubicEffect = processor.cast<GrBicubicEffect>();
     const GrTexture& texture = *processor.texture(0);
     float imageIncrement[2];
     imageIncrement[0] = 1.0f / texture.width();
     imageIncrement[1] = 1.0f / texture.height();
     pdman.set2fv(fImageIncrementUni, 1, imageIncrement);
@@ skipping 94 matching lines @@
             // Use bilerp to handle rotation or fractional translation.
             *filterMode = GrTextureParams::kBilerp_FilterMode;
         }
         return false;
     }
     // When we use the bicubic filtering effect each sample is read from the texture using
     // nearest neighbor sampling.
     *filterMode = GrTextureParams::kNone_FilterMode;
     return true;
 }