GP Emit Code takes a struct

src/gpu/effects/GrDashingEffect.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 "GrDashingEffect.h"
 
 #include "../GrAARectRenderer.h"
@@ skipping 464 matching lines @@
 
     typedef GrGeometryProcessor INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 class GLDashingCircleEffect : public GrGLGeometryProcessor {
 public:
     GLDashingCircleEffect(const GrBackendProcessorFactory&, const GrProcessor&);
 
-    virtual void emitCode(GrGLGPBuilder* builder,
-                          const GrGeometryProcessor& geometryProcessor,
-                          const GrProcessorKey& key,
-                          const char* outputColor,
-                          const char* inputColor,
-                          const TransformedCoordsArray&,
-                          const TextureSamplerArray&) SK_OVERRIDE;
+    virtual void emitCode(const EmitArgs&) SK_OVERRIDE;
 
     static inline void GenKey(const GrProcessor&, const GrGLCaps&, GrProcessorKeyBuilder*);
 
     virtual void setData(const GrGLProgramDataManager&, const GrProcessor&) SK_OVERRIDE;
 
 private:
     GrGLProgramDataManager::UniformHandle fParamUniform;
     SkScalar                              fPrevRadius;
     SkScalar                              fPrevCenterX;
     SkScalar                              fPrevIntervalLength;
     typedef GrGLGeometryProcessor INHERITED;
 };
 
 GLDashingCircleEffect::GLDashingCircleEffect(const GrBackendProcessorFactory& factory,
                                              const GrProcessor&)
     : INHERITED (factory) {
     fPrevRadius = SK_ScalarMin;
     fPrevCenterX = SK_ScalarMin;
     fPrevIntervalLength = SK_ScalarMax;
 }
 
-void GLDashingCircleEffect::emitCode(GrGLGPBuilder* builder,
-                                    const GrGeometryProcessor& geometryProcessor,
-                                    const GrProcessorKey& key,
-                                    const char* outputColor,
-                                    const char* inputColor,
-                                    const TransformedCoordsArray&,
-                                    const TextureSamplerArray& samplers) {
-    const DashingCircleEffect& dce = geometryProcessor.cast<DashingCircleEffect>();
+void GLDashingCircleEffect::emitCode(const EmitArgs& args) {
+    const DashingCircleEffect& dce = args.fGP.cast<DashingCircleEffect>();
     const char *paramName;
     // The param uniforms, xyz, refer to circle radius - 0.5, cicles center x coord, and
     // the total interval length of the dash.
-    fParamUniform = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
-                                       kVec3f_GrSLType,
-                                       "params",
-                                       &paramName);
+    fParamUniform = args.fPB->addUniform(GrGLProgramBuilder::kFragment_Visibility,
+                                         kVec3f_GrSLType,
+                                         "params",
+                                         &paramName);
 
     const char *vsCoordName, *fsCoordName;
-    builder->addVarying(kVec2f_GrSLType, "Coord", &vsCoordName, &fsCoordName);
+    args.fPB->addVarying(kVec2f_GrSLType, "Coord", &vsCoordName, &fsCoordName);
 
-    GrGLVertexBuilder* vsBuilder = builder->getVertexShaderBuilder();
+    GrGLVertexBuilder* vsBuilder = args.fPB->getVertexShaderBuilder();
     vsBuilder->codeAppendf("\t%s = %s;\n", vsCoordName, dce.inCoord().c_str());
 
     // transforms all points so that we can compare them to our test circle
-    GrGLGPFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder();
+    GrGLGPFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder();
     fsBuilder->codeAppendf("\t\tfloat xShifted = %s.x - floor(%s.x / %s.z) * %s.z;\n",
                            fsCoordName, fsCoordName, paramName, paramName);
     fsBuilder->codeAppendf("\t\tvec2 fragPosShifted = vec2(xShifted, %s.y);\n", fsCoordName);
     fsBuilder->codeAppendf("\t\tvec2 center = vec2(%s.y, 0.0);\n", paramName);
     fsBuilder->codeAppend("\t\tfloat dist = length(center - fragPosShifted);\n");
     if (GrProcessorEdgeTypeIsAA(dce.getEdgeType())) {
         fsBuilder->codeAppendf("\t\tfloat diff = dist - %s.x;\n", paramName);
         fsBuilder->codeAppend("\t\tdiff = 1.0 - diff;\n");
         fsBuilder->codeAppend("\t\tfloat alpha = clamp(diff, 0.0, 1.0);\n");
     } else {
         fsBuilder->codeAppendf("\t\tfloat alpha = 1.0;\n");
         fsBuilder->codeAppendf("\t\talpha *=  dist < %s.x + 0.5 ? 1.0 : 0.0;\n", paramName);
     }
-    fsBuilder->codeAppendf("\t\t%s = %s;\n", outputColor,
-                           (GrGLSLExpr4(inputColor) * GrGLSLExpr1("alpha")).c_str());
+    fsBuilder->codeAppendf("\t\t%s = %s;\n", args.fOutput,
+                           (GrGLSLExpr4(args.fInput) * GrGLSLExpr1("alpha")).c_str());
 }
 
 void GLDashingCircleEffect::setData(const GrGLProgramDataManager& pdman
                                     , const GrProcessor& processor) {
     const DashingCircleEffect& dce = processor.cast<DashingCircleEffect>();
     SkScalar radius = dce.getRadius();
     SkScalar centerX = dce.getCenterX();
     SkScalar intervalLength = dce.getIntervalLength();
     if (radius != fPrevRadius || centerX != fPrevCenterX || intervalLength != fPrevIntervalLength) {
         pdman.set3f(fParamUniform, radius - 0.5f, centerX, intervalLength);
@@ skipping 124 matching lines @@
 
     typedef GrGeometryProcessor INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 class GLDashingLineEffect : public GrGLGeometryProcessor {
 public:
     GLDashingLineEffect(const GrBackendProcessorFactory&, const GrProcessor&);
 
-    virtual void emitCode(GrGLGPBuilder* builder,
-                          const GrGeometryProcessor& geometryProcessor,
-                          const GrProcessorKey& key,
-                          const char* outputColor,
-                          const char* inputColor,
-                          const TransformedCoordsArray&,
-                          const TextureSamplerArray&) SK_OVERRIDE;
+    virtual void emitCode(const EmitArgs&) SK_OVERRIDE;
 
     static inline void GenKey(const GrProcessor&, const GrGLCaps&, GrProcessorKeyBuilder*);
 
     virtual void setData(const GrGLProgramDataManager&, const GrProcessor&) SK_OVERRIDE;
 
 private:
     GrGLProgramDataManager::UniformHandle fRectUniform;
     GrGLProgramDataManager::UniformHandle fIntervalUniform;
     SkRect                                fPrevRect;
     SkScalar                              fPrevIntervalLength;
     typedef GrGLGeometryProcessor INHERITED;
 };
 
 GLDashingLineEffect::GLDashingLineEffect(const GrBackendProcessorFactory& factory,
                                          const GrProcessor&)
     : INHERITED (factory) {
     fPrevRect.fLeft = SK_ScalarNaN;
     fPrevIntervalLength = SK_ScalarMax;
 }
 
-void GLDashingLineEffect::emitCode(GrGLGPBuilder* builder,
-                                   const GrGeometryProcessor& geometryProcessor,
-                                   const GrProcessorKey& key,
-                                   const char* outputColor,
-                                   const char* inputColor,
-                                   const TransformedCoordsArray&,
-                                   const TextureSamplerArray& samplers) {
-    const DashingLineEffect& de = geometryProcessor.cast<DashingLineEffect>();
+void GLDashingLineEffect::emitCode(const EmitArgs& args) {
+    const DashingLineEffect& de = args.fGP.cast<DashingLineEffect>();
     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.fPB->addUniform(GrGLProgramBuilder::kFragment_Visibility,
                                        kVec4f_GrSLType,
                                        "rect",
                                        &rectName);
     const char *intervalName;
     // The interval uniform's refers to the total length of the interval (on + off)
-    fIntervalUniform = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
-                                       kFloat_GrSLType,
-                                       "interval",
-                                       &intervalName);
+    fIntervalUniform = args.fPB->addUniform(GrGLProgramBuilder::kFragment_Visibility,
+                                            kFloat_GrSLType,
+                                            "interval",
+                                            &intervalName);
 
     const char *vsCoordName, *fsCoordName;
-    builder->addVarying(kVec2f_GrSLType, "Coord", &vsCoordName, &fsCoordName);
-    GrGLVertexBuilder* vsBuilder = builder->getVertexShaderBuilder();
+    args.fPB->addVarying(kVec2f_GrSLType, "Coord", &vsCoordName, &fsCoordName);
+    GrGLVertexBuilder* vsBuilder = args.fPB->getVertexShaderBuilder();
     vsBuilder->codeAppendf("\t%s = %s;\n", vsCoordName, de.inCoord().c_str());
 
     // transforms all points so that we can compare them to our test rect
-    GrGLGPFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder();
+    GrGLGPFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder();
     fsBuilder->codeAppendf("\t\tfloat xShifted = %s.x - floor(%s.x / %s) * %s;\n",
                            fsCoordName, fsCoordName, intervalName, intervalName);
     fsBuilder->codeAppendf("\t\tvec2 fragPosShifted = vec2(xShifted, %s.y);\n", fsCoordName);
     if (GrProcessorEdgeTypeIsAA(de.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(fragPosShifted.x - %s.x, 0.0);\n", rectName);
         fsBuilder->codeAppendf("\t\txSub += min(%s.z - fragPosShifted.x, 0.0);\n", rectName);
         fsBuilder->codeAppendf("\t\tySub = min(fragPosShifted.y - %s.y, 0.0);\n", rectName);
         fsBuilder->codeAppendf("\t\tySub += min(%s.w - fragPosShifted.y, 0.0);\n", rectName);
         // 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 {
         // Assuming the bounding geometry is tight so no need to check y values
         fsBuilder->codeAppendf("\t\tfloat alpha = 1.0;\n");
         fsBuilder->codeAppendf("\t\talpha *= (fragPosShifted.x - %s.x) > -0.5 ? 1.0 : 0.0;\n", rectName);
         fsBuilder->codeAppendf("\t\talpha *= (%s.z - fragPosShifted.x) >= -0.5 ? 1.0 : 0.0;\n", rectName);
     }
-    fsBuilder->codeAppendf("\t\t%s = %s;\n", outputColor,
-                           (GrGLSLExpr4(inputColor) * GrGLSLExpr1("alpha")).c_str());
+    fsBuilder->codeAppendf("\t\t%s = %s;\n", args.fOutput,
+                           (GrGLSLExpr4(args.fInput) * GrGLSLExpr1("alpha")).c_str());
 }
 
 void GLDashingLineEffect::setData(const GrGLProgramDataManager& pdman,
                                   const GrProcessor& processor) {
     const DashingLineEffect& de = processor.cast<DashingLineEffect>();
     const SkRect& rect = de.getRect();
     SkScalar intervalLength = de.getIntervalLength();
     if (rect != fPrevRect || intervalLength != fPrevIntervalLength) {
         pdman.set4f(fRectUniform, rect.fLeft + 0.5f, rect.fTop + 0.5f,
                     rect.fRight - 0.5f, rect.fBottom - 0.5f);
@@ skipping 81 matching lines @@
     switch (cap) {
         case GrDashingEffect::kRound_DashCap:
             return DashingCircleEffect::Create(edgeType, info, SkScalarHalf(strokeWidth));
         case GrDashingEffect::kNonRound_DashCap:
             return DashingLineEffect::Create(edgeType, info, strokeWidth);
         default:
             SkFAIL("Unexpected dashed cap.");
     }
     return NULL;
 }