Express (GLSL expression, possibly known value) pairs as a class

src/gpu/effects/GrBezierEffect.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrBezierEffect.h"
 
 #include "gl/GrGLEffect.h"
@@ skipping 92 matching lines @@
             break;
         }
         case kFillNoAA_GrBezierEdgeType: {
             builder->fsCodeAppendf("\t\tedgeAlpha = %s.x*%s.x - %s.y*%s.z;\n", fsName, fsName,
                                    fsName, fsName);
             builder->fsCodeAppend("\t\tedgeAlpha = float(edgeAlpha < 0.0);\n");
             break;
         }
     }
 
-    SkString modulate;
-    GrGLSLModulatef<4>(&modulate, inputColor, "edgeAlpha");
-    builder->fsCodeAppendf("\t%s = %s;\n", outputColor, modulate.c_str());
+    builder->fsCodeAppendf("\t%s = %s;\n", outputColor,
+                           (GrGLSLExpr<4>(inputColor) * GrGLSLExpr<1>("edgeAlpha")).c_str());
 }
 
 GrGLEffect::EffectKey GrGLConicEffect::GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&) {
     const GrConicEffect& ce = drawEffect.castEffect<GrConicEffect>();
     return ce.isAntiAliased() ? (ce.isFilled() ? 0x0 : 0x1) : 0x2;
 }
 
 //////////////////////////////////////////////////////////////////////////////
 
 GrConicEffect::~GrConicEffect() {}
@@ skipping 106 matching lines @@
             break;
         }
         case kFillNoAA_GrBezierEdgeType: {
             builder->fsCodeAppendf("\t\tedgeAlpha = (%s.x*%s.x - %s.y);\n", fsName, fsName,
                                    fsName);
             builder->fsCodeAppend("\t\tedgeAlpha = float(edgeAlpha < 0.0);\n");
             break;
         }
     }
 
-    SkString modulate;
-    GrGLSLModulatef<4>(&modulate, inputColor, "edgeAlpha");
-    builder->fsCodeAppendf("\t%s = %s;\n", outputColor, modulate.c_str());
+    builder->fsCodeAppendf("\t%s = %s;\n", outputColor,
+                           (GrGLSLExpr<4>(inputColor) * GrGLSLExpr<1>("edgeAlpha")).c_str());
+
 
     builder->vsCodeAppendf("\t%s = %s;\n", vsName, attrName->c_str());
 }
 
 GrGLEffect::EffectKey GrGLQuadEffect::GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&) {
     const GrQuadEffect& ce = drawEffect.castEffect<GrQuadEffect>();
     return ce.isAntiAliased() ? (ce.isFilled() ? 0x0 : 0x1) : 0x2;
 }
 
 //////////////////////////////////////////////////////////////////////////////
@@ skipping 121 matching lines @@
             break;
         }
         case kFillNoAA_GrBezierEdgeType: {
             builder->fsCodeAppendf("\t\tedgeAlpha = %s.x*%s.x*%s.x - %s.y*%s.z;\n",
                                    fsName, fsName, fsName, fsName, fsName);
             builder->fsCodeAppend("\t\tedgeAlpha = float(edgeAlpha < 0.0);\n");
             break;
         }
     }
 
-    SkString modulate;
-    GrGLSLModulatef<4>(&modulate, inputColor, "edgeAlpha");
-    builder->fsCodeAppendf("\t%s = %s;\n", outputColor, modulate.c_str());
+    builder->fsCodeAppendf("\t%s = %s;\n", outputColor,
+                           (GrGLSLExpr<4>(inputColor) * GrGLSLExpr<1>("edgeAlpha")).c_str());
 }
 
 GrGLEffect::EffectKey GrGLCubicEffect::GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&) {
     const GrCubicEffect& ce = drawEffect.castEffect<GrCubicEffect>();
     return ce.isAntiAliased() ? (ce.isFilled() ? 0x0 : 0x1) : 0x2;
 }
 
 //////////////////////////////////////////////////////////////////////////////
 
 GrCubicEffect::~GrCubicEffect() {}
@@ skipping 16 matching lines @@
 
 GR_DEFINE_EFFECT_TEST(GrCubicEffect);
 
 GrEffectRef* GrCubicEffect::TestCreate(SkRandom* random,
                                              GrContext*,
                                              const GrDrawTargetCaps& caps,
                                              GrTexture*[]) {
     const GrBezierEdgeType edgeType = static_cast<GrBezierEdgeType>(random->nextULessThan(3));
     return GrCubicEffect::Create(edgeType, caps);
 }