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

src/gpu/effects/GrConvexPolyEffect.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 "GrConvexPolyEffect.h"
 #include "GrInvariantOutput.h"
 #include "SkPathPriv.h"
@@ skipping 63 matching lines @@
     } while (NULL == fp);
     return fp;
 }
 
 //////////////////////////////////////////////////////////////////////////////
 
 class GLAARectEffect : public GrGLFragmentProcessor {
 public:
     GLAARectEffect(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 fRectUniform;
     SkRect                                fPrevRect;
     typedef GrGLFragmentProcessor INHERITED;
 };
 
 GLAARectEffect::GLAARectEffect(const GrProcessor& effect) {
     fPrevRect.fLeft = SK_ScalarNaN;
 }
 
-void GLAARectEffect::emitCode(GrGLFPBuilder* builder,
-                              const GrFragmentProcessor& fp,
-                              const char* outputColor,
-                              const char* inputColor,
-                              const TransformedCoordsArray&,
-                              const TextureSamplerArray& samplers) {
-    const AARectEffect& aare = fp.cast<AARectEffect>();
+void GLAARectEffect::emitCode(EmitArgs& args) {
+    const AARectEffect& aare = args.fFp.cast<AARectEffect>();
     const char *rectName;
     // The rect uniform's xyzw refer to (left + 0.5, top + 0.5, right - 0.5, bottom - 0.5),
     // respectively.
-    fRectUniform = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
+    fRectUniform = args.fBuilder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
                                        kVec4f_GrSLType,
                                        kDefault_GrSLPrecision,
                                        "rect",
                                        &rectName);
 
-    GrGLFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder();
+    GrGLFragmentBuilder* fsBuilder = args.fBuilder->getFragmentShaderBuilder();
     const char* fragmentPos = fsBuilder->fragmentPosition();
     if (GrProcessorEdgeTypeIsAA(aare.getEdgeType())) {
         // The amount of coverage removed in x and y by the edges is computed as a pair of negative
         // numbers, xSub and ySub.
         fsBuilder->codeAppend("\t\tfloat xSub, ySub;\n");
         fsBuilder->codeAppendf("\t\txSub = min(%s.x - %s.x, 0.0);\n", fragmentPos, rectName);
         fsBuilder->codeAppendf("\t\txSub += min(%s.z - %s.x, 0.0);\n", rectName, fragmentPos);
         fsBuilder->codeAppendf("\t\tySub = min(%s.y - %s.y, 0.0);\n", fragmentPos, rectName);
         fsBuilder->codeAppendf("\t\tySub += min(%s.w - %s.y, 0.0);\n", rectName, fragmentPos);
         // Now compute coverage in x and y and multiply them to get the fraction of the pixel
         // covered.
         fsBuilder->codeAppendf("\t\tfloat alpha = (1.0 + max(xSub, -1.0)) * (1.0 + max(ySub, -1.0));\n");
     } else {
         fsBuilder->codeAppendf("\t\tfloat alpha = 1.0;\n");
         fsBuilder->codeAppendf("\t\talpha *= (%s.x - %s.x) > -0.5 ? 1.0 : 0.0;\n", fragmentPos, rectName);
         fsBuilder->codeAppendf("\t\talpha *= (%s.z - %s.x) > -0.5 ? 1.0 : 0.0;\n", rectName, fragmentPos);
         fsBuilder->codeAppendf("\t\talpha *= (%s.y - %s.y) > -0.5 ? 1.0 : 0.0;\n", fragmentPos, rectName);
         fsBuilder->codeAppendf("\t\talpha *= (%s.w - %s.y) > -0.5 ? 1.0 : 0.0;\n", rectName, fragmentPos);
     }
 
     if (GrProcessorEdgeTypeIsInverseFill(aare.getEdgeType())) {
         fsBuilder->codeAppend("\t\talpha = 1.0 - alpha;\n");
     }
-    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 GLAARectEffect::setData(const GrGLProgramDataManager& pdman, const GrProcessor& processor) {
     const AARectEffect& aare = processor.cast<AARectEffect>();
     const SkRect& rect = aare.getRect();
     if (rect != fPrevRect) {
         pdman.set4f(fRectUniform, rect.fLeft + 0.5f, rect.fTop + 0.5f,
                    rect.fRight - 0.5f, rect.fBottom - 0.5f);
         fPrevRect = rect;
     }
@@ skipping 12 matching lines @@
 GrGLFragmentProcessor* AARectEffect::createGLInstance() const  {
     return SkNEW_ARGS(GLAARectEffect, (*this));
 }
 
 //////////////////////////////////////////////////////////////////////////////
 
 class GrGLConvexPolyEffect : public GrGLFragmentProcessor {
 public:
     GrGLConvexPolyEffect(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 fEdgeUniform;
     SkScalar                              fPrevEdges[3 * GrConvexPolyEffect::kMaxEdges];
     typedef GrGLFragmentProcessor INHERITED;
 };
 
 GrGLConvexPolyEffect::GrGLConvexPolyEffect(const GrProcessor&) {
     fPrevEdges[0] = SK_ScalarNaN;
 }
 
-void GrGLConvexPolyEffect::emitCode(GrGLFPBuilder* builder,
-                                    const GrFragmentProcessor& fp,
-                                    const char* outputColor,
-                                    const char* inputColor,
-                                    const TransformedCoordsArray&,
-                                    const TextureSamplerArray& samplers) {
-    const GrConvexPolyEffect& cpe = fp.cast<GrConvexPolyEffect>();
+void GrGLConvexPolyEffect::emitCode(EmitArgs& args) {
+    const GrConvexPolyEffect& cpe = args.fFp.cast<GrConvexPolyEffect>();
 
     const char *edgeArrayName;
-    fEdgeUniform = builder->addUniformArray(GrGLProgramBuilder::kFragment_Visibility,
+    fEdgeUniform = args.fBuilder->addUniformArray(GrGLProgramBuilder::kFragment_Visibility,
                                             kVec3f_GrSLType,
                                              kDefault_GrSLPrecision,
                                              "edges",
                                             cpe.getEdgeCount(),
                                             &edgeArrayName);
-    GrGLFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder();
+    GrGLFragmentBuilder* fsBuilder = args.fBuilder->getFragmentShaderBuilder();
     fsBuilder->codeAppend("\t\tfloat alpha = 1.0;\n");
     fsBuilder->codeAppend("\t\tfloat edge;\n");
     const char* fragmentPos = fsBuilder->fragmentPosition();
     for (int i = 0; i < cpe.getEdgeCount(); ++i) {
         fsBuilder->codeAppendf("\t\tedge = dot(%s[%d], vec3(%s.x, %s.y, 1));\n",
                                edgeArrayName, i, fragmentPos, fragmentPos);
         if (GrProcessorEdgeTypeIsAA(cpe.getEdgeType())) {
             fsBuilder->codeAppend("\t\tedge = clamp(edge, 0.0, 1.0);\n");
         } else {
             fsBuilder->codeAppend("\t\tedge = edge >= 0.5 ? 1.0 : 0.0;\n");
         }
         fsBuilder->codeAppend("\t\talpha *= edge;\n");
     }
 
     // Woe is me. See skbug.com/2149.
-    if (kTegra2_GrGLRenderer == builder->ctxInfo().renderer()) {
+    if (kTegra2_GrGLRenderer == args.fBuilder->ctxInfo().renderer()) {
         fsBuilder->codeAppend("\t\tif (-1.0 == alpha) {\n\t\t\tdiscard;\n\t\t}\n");
     }
 
     if (GrProcessorEdgeTypeIsInverseFill(cpe.getEdgeType())) {
         fsBuilder->codeAppend("\talpha = 1.0 - alpha;\n");
     }
-    fsBuilder->codeAppendf("\t%s = %s;\n", outputColor,
-                           (GrGLSLExpr4(inputColor) * GrGLSLExpr1("alpha")).c_str());
+    fsBuilder->codeAppendf("\t%s = %s;\n", args.fOutputColor,
+                           (GrGLSLExpr4(args.fInputColor) * GrGLSLExpr1("alpha")).c_str());
 }
 
 void GrGLConvexPolyEffect::setData(const GrGLProgramDataManager& pdman, const GrProcessor& effect) {
     const GrConvexPolyEffect& cpe = effect.cast<GrConvexPolyEffect>();
     size_t byteSize = 3 * cpe.getEdgeCount() * sizeof(SkScalar);
     if (0 != memcmp(fPrevEdges, cpe.getEdges(), byteSize)) {
         pdman.set3fv(fEdgeUniform, cpe.getEdgeCount(), cpe.getEdges());
         memcpy(fPrevEdges, cpe.getEdges(), byteSize);
     }
 }
@@ skipping 115 matching lines @@
     }
 
     GrFragmentProcessor* fp;
     do {
         GrPrimitiveEdgeType edgeType = static_cast<GrPrimitiveEdgeType>(
                 d->fRandom->nextULessThan(kGrProcessorEdgeTypeCnt));
         fp = GrConvexPolyEffect::Create(edgeType, count, edges);
     } while (NULL == fp);
     return fp;
 }