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

src/gpu/effects/GrOvalEffect.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 "GrOvalEffect.h"
 
 #include "GrFragmentProcessor.h"
@@ skipping 75 matching lines @@
     } while (kHairlineAA_GrProcessorEdgeType == et);
     return CircleEffect::Create(et, center, radius);
 }
 
 //////////////////////////////////////////////////////////////////////////////
 
 class GLCircleEffect : public GrGLFragmentProcessor {
 public:
     GLCircleEffect(const GrProcessor&);
 
-    virtual void emitCode(GrGLFPBuilder* builder,
-                          const GrFragmentProcessor& fp,
-                          const char* outputColor,
-                          const char* inputColor,
-                          const TransformedCoordsArray&,
-                          const TextureSamplerArray&) override;
+    virtual void emitCode(EmitArgs&) override;
 
     static inline void GenKey(const GrProcessor&, const GrGLSLCaps&, GrProcessorKeyBuilder*);
 
     void setData(const GrGLProgramDataManager&, const GrProcessor&) override;
 
 private:
     GrGLProgramDataManager::UniformHandle fCircleUniform;
     SkPoint                               fPrevCenter;
     SkScalar                              fPrevRadius;
 
     typedef GrGLFragmentProcessor INHERITED;
 };
 
 GLCircleEffect::GLCircleEffect(const GrProcessor&) {
     fPrevRadius = -1.f;
 }
 
-void GLCircleEffect::emitCode(GrGLFPBuilder* builder,
-                              const GrFragmentProcessor& fp,
-                              const char* outputColor,
-                              const char* inputColor,
-                              const TransformedCoordsArray&,
-                              const TextureSamplerArray& samplers) {
-    const CircleEffect& ce = fp.cast<CircleEffect>();
+void GLCircleEffect::emitCode(EmitArgs& args) {
+    const CircleEffect& ce = args.fFp.cast<CircleEffect>();
     const char *circleName;
     // The circle uniform is (center.x, center.y, radius + 0.5, 1 / (radius + 0.5)) for regular
     // fills and (..., radius - 0.5, 1 / (radius - 0.5)) for inverse fills.
-    fCircleUniform = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
+    fCircleUniform = args.fBuilder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
                                          kVec4f_GrSLType, kDefault_GrSLPrecision,
                                          "circle",
                                          &circleName);
 
-    GrGLFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder();
+    GrGLFragmentBuilder* fsBuilder = args.fBuilder->getFragmentShaderBuilder();
     const char* fragmentPos = fsBuilder->fragmentPosition();
 
     SkASSERT(kHairlineAA_GrProcessorEdgeType != ce.getEdgeType());
     // TODO: Right now the distance to circle caclulation is performed in a space normalized to the
     // radius and then denormalized. This is to prevent overflow on devices that have a "real"
     // mediump. It'd be nice to only to this on mediump devices but we currently don't have the
     // caps here.
     if (GrProcessorEdgeTypeIsInverseFill(ce.getEdgeType())) {
         fsBuilder->codeAppendf("\t\tfloat d = (length((%s.xy - %s.xy) * %s.w) - 1.0) * %s.z;\n",
                                 circleName, fragmentPos, circleName, circleName);
     } else {
         fsBuilder->codeAppendf("\t\tfloat d = (1.0 - length((%s.xy - %s.xy) *  %s.w)) * %s.z;\n",
                                circleName, fragmentPos, circleName, circleName);
     }
     if (GrProcessorEdgeTypeIsAA(ce.getEdgeType())) {
         fsBuilder->codeAppend("\t\td = clamp(d, 0.0, 1.0);\n");
     } else {
         fsBuilder->codeAppend("\t\td = d > 0.5 ? 1.0 : 0.0;\n");
     }
 
-    fsBuilder->codeAppendf("\t\t%s = %s;\n", outputColor,
-                           (GrGLSLExpr4(inputColor) * GrGLSLExpr1("d")).c_str());
+    fsBuilder->codeAppendf("\t\t%s = %s;\n", args.fOutputColor,
+                           (GrGLSLExpr4(args.fInputColor) * GrGLSLExpr1("d")).c_str());
 }
 
 void GLCircleEffect::GenKey(const GrProcessor& processor, const GrGLSLCaps&,
                             GrProcessorKeyBuilder* b) {
     const CircleEffect& ce = processor.cast<CircleEffect>();
     b->add32(ce.getEdgeType());
 }
 
 void GLCircleEffect::setData(const GrGLProgramDataManager& pdman, const GrProcessor& processor) {
     const CircleEffect& ce = processor.cast<CircleEffect>();
@@ skipping 99 matching lines @@
     } while (kHairlineAA_GrProcessorEdgeType == et);
     return EllipseEffect::Create(et, center, rx, ry);
 }
 
 //////////////////////////////////////////////////////////////////////////////
 
 class GLEllipseEffect : public GrGLFragmentProcessor {
 public:
     GLEllipseEffect(const GrProcessor&);
 
-    virtual void emitCode(GrGLFPBuilder* builder,
-                          const GrFragmentProcessor& fp,
-                          const char* outputColor,
-                          const char* inputColor,
-                          const TransformedCoordsArray&,
-                          const TextureSamplerArray&) override;
+    virtual void emitCode(EmitArgs&) override;
 
     static inline void GenKey(const GrProcessor&, const GrGLSLCaps&, GrProcessorKeyBuilder*);
 
     void setData(const GrGLProgramDataManager&, const GrProcessor&) override;
 
 private:
     GrGLProgramDataManager::UniformHandle fEllipseUniform;
     SkPoint                               fPrevCenter;
     SkVector                              fPrevRadii;
 
     typedef GrGLFragmentProcessor INHERITED;
 };
 
 GLEllipseEffect::GLEllipseEffect(const GrProcessor& effect) {
     fPrevRadii.fX = -1.f;
 }
 
-void GLEllipseEffect::emitCode(GrGLFPBuilder* builder,
-                               const GrFragmentProcessor& fp,
-                               const char* outputColor,
-                               const char* inputColor,
-                               const TransformedCoordsArray&,
-                               const TextureSamplerArray& samplers) {
-    const EllipseEffect& ee = fp.cast<EllipseEffect>();
+void GLEllipseEffect::emitCode(EmitArgs& args) {
+    const EllipseEffect& ee = args.fFp.cast<EllipseEffect>();
     const char *ellipseName;
     // The ellipse uniform is (center.x, center.y, 1 / rx^2, 1 / ry^2)
-    fEllipseUniform = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
+    fEllipseUniform = args.fBuilder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
                                          kVec4f_GrSLType, kDefault_GrSLPrecision,
                                          "ellipse",
                                          &ellipseName);
 
-    GrGLFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder();
+    GrGLFragmentBuilder* fsBuilder = args.fBuilder->getFragmentShaderBuilder();
     const char* fragmentPos = fsBuilder->fragmentPosition();
 
     // d is the offset to the ellipse center
     fsBuilder->codeAppendf("\t\tvec2 d = %s.xy - %s.xy;\n", fragmentPos, ellipseName);
     fsBuilder->codeAppendf("\t\tvec2 Z = d * %s.zw;\n", ellipseName);
     // implicit is the evaluation of (x/rx)^2 + (y/ry)^2 - 1.
     fsBuilder->codeAppend("\t\tfloat implicit = dot(Z, d) - 1.0;\n");
     // grad_dot is the squared length of the gradient of the implicit.
     fsBuilder->codeAppendf("\t\tfloat grad_dot = 4.0 * dot(Z, Z);\n");
     // avoid calling inversesqrt on zero.
@@ skipping 10 matching lines @@
         case kFillBW_GrProcessorEdgeType:
             fsBuilder->codeAppend("\t\tfloat alpha = approx_dist > 0.0 ? 0.0 : 1.0;\n");
             break;
         case kInverseFillBW_GrProcessorEdgeType:
             fsBuilder->codeAppend("\t\tfloat alpha = approx_dist > 0.0 ? 1.0 : 0.0;\n");
             break;
         case kHairlineAA_GrProcessorEdgeType:
             SkFAIL("Hairline not expected here.");
     }
 
-    fsBuilder->codeAppendf("\t\t%s = %s;\n", outputColor,
-                           (GrGLSLExpr4(inputColor) * GrGLSLExpr1("alpha")).c_str());
+    fsBuilder->codeAppendf("\t\t%s = %s;\n", args.fOutputColor,
+                           (GrGLSLExpr4(args.fInputColor) * GrGLSLExpr1("alpha")).c_str());
 }
 
 void GLEllipseEffect::GenKey(const GrProcessor& effect, const GrGLSLCaps&,
                              GrProcessorKeyBuilder* b) {
     const EllipseEffect& ee = effect.cast<EllipseEffect>();
     b->add32(ee.getEdgeType());
 }
 
 void GLEllipseEffect::setData(const GrGLProgramDataManager& pdman, const GrProcessor& effect) {
     const EllipseEffect& ee = effect.cast<EllipseEffect>();
@@ skipping 29 matching lines @@
         w /= 2;
         return CircleEffect::Create(edgeType, SkPoint::Make(oval.fLeft + w, oval.fTop + w), w);
     } else {
         w /= 2;
         h /= 2;
         return EllipseEffect::Create(edgeType, SkPoint::Make(oval.fLeft + w, oval.fTop + h), w, h);
     }
 
     return NULL;
 }