Make GrGLEffects use an interface to append their code.

src/effects/SkBlendImageFilter.cpp

 /*
  * Copyright 2012 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBlendImageFilter.h"
 #include "SkCanvas.h"
 #include "SkColorPriv.h"
@@ skipping 228 matching lines @@
                                const char* outputColor,
                                const char* inputColor,
                                const TextureSamplerArray& samplers) {
     const char* fgCoords;
     const char* bgCoords;
     GrSLType fgCoordsType =  fForegroundEffectMatrix.emitCode(
         builder, key, vertexCoords, &fgCoords, NULL, "FG");
     GrSLType bgCoordsType =  fBackgroundEffectMatrix.emitCode(
         builder, key, vertexCoords, &bgCoords, NULL, "BG");
 
-    SkString* code = &builder->fFSCode;
     const char* bgColor = "bgColor";
     const char* fgColor = "fgColor";
 
-    code->appendf("\t\tvec4 %s = ", fgColor);
-    builder->appendTextureLookup(code, samplers[0], fgCoords, fgCoordsType);
-    code->append(";\n");
+    builder->fsCodeAppendf("\t\tvec4 %s = ", fgColor);
+    builder->appendTextureLookup(GrGLShaderBuilder::kFragment_ShaderType,
+                                 samplers[0],
+                                 fgCoords,
+                                 fgCoordsType);
+    builder->fsCodeAppend(";\n");
 
-    code->appendf("\t\tvec4 %s = ", bgColor);
-    builder->appendTextureLookup(code, samplers[1], bgCoords, bgCoordsType);
-    code->append(";\n");
+    builder->fsCodeAppendf("\t\tvec4 %s = ", bgColor);
+    builder->appendTextureLookup(GrGLShaderBuilder::kFragment_ShaderType,
+                                 samplers[1],
+                                 bgCoords,
+                                 bgCoordsType);
+    builder->fsCodeAppendf(";\n");
 
-    code->appendf("\t\t%s.a = 1.0 - (1.0 - %s.a) * (1.0 - %s.b);\n", outputColor, bgColor, fgColor);
+    builder->fsCodeAppendf("\t\t%s.a = 1.0 - (1.0 - %s.a) * (1.0 - %s.b);\n", outputColor, bgColor, fgColor);
     switch (fMode) {
       case SkBlendImageFilter::kNormal_Mode:
-        code->appendf("\t\t%s.rgb = (1.0 - %s.a) * %s.rgb + %s.rgb;\n", outputColor, fgColor, bgColor, fgColor);
+        builder->fsCodeAppendf("\t\t%s.rgb = (1.0 - %s.a) * %s.rgb + %s.rgb;\n", outputColor, fgColor, bgColor, fgColor);
         break;
       case SkBlendImageFilter::kMultiply_Mode:
-        code->appendf("\t\t%s.rgb = (1.0 - %s.a) * %s.rgb + (1.0 - %s.a) * %s.rgb + %s.rgb * %s.rgb;\n", outputColor, fgColor, bgColor, bgColor, fgColor, fgColor, bgColor);
+        builder->fsCodeAppendf("\t\t%s.rgb = (1.0 - %s.a) * %s.rgb + (1.0 - %s.a) * %s.rgb + %s.rgb * %s.rgb;\n", outputColor, fgColor, bgColor, bgColor, fgColor, fgColor, bgColor);
         break;
       case SkBlendImageFilter::kScreen_Mode:
-        code->appendf("\t\t%s.rgb = %s.rgb + %s.rgb - %s.rgb * %s.rgb;\n", outputColor, bgColor, fgColor, fgColor, bgColor);
+        builder->fsCodeAppendf("\t\t%s.rgb = %s.rgb + %s.rgb - %s.rgb * %s.rgb;\n", outputColor, bgColor, fgColor, fgColor, bgColor);
         break;
       case SkBlendImageFilter::kDarken_Mode:
-        code->appendf("\t\t%s.rgb = min((1.0 - %s.a) * %s.rgb + %s.rgb, (1.0 - %s.a) * %s.rgb + %s.rgb);\n", outputColor, fgColor, bgColor, fgColor, bgColor, fgColor, bgColor);
+        builder->fsCodeAppendf("\t\t%s.rgb = min((1.0 - %s.a) * %s.rgb + %s.rgb, (1.0 - %s.a) * %s.rgb + %s.rgb);\n", outputColor, fgColor, bgColor, fgColor, bgColor, fgColor, bgColor);
         break;
       case SkBlendImageFilter::kLighten_Mode:
-        code->appendf("\t\t%s.rgb = max((1.0 - %s.a) * %s.rgb + %s.rgb, (1.0 - %s.a) * %s.rgb + %s.rgb);\n", outputColor, fgColor, bgColor, fgColor, bgColor, fgColor, bgColor);
+        builder->fsCodeAppendf("\t\t%s.rgb = max((1.0 - %s.a) * %s.rgb + %s.rgb, (1.0 - %s.a) * %s.rgb + %s.rgb);\n", outputColor, fgColor, bgColor, fgColor, bgColor, fgColor, bgColor);
         break;
     }
 }
 
 void GrGLBlendEffect::setData(const GrGLUniformManager& uman, const GrEffectStage& stage) {
     const GrBlendEffect& blend = GetEffectFromStage<GrBlendEffect>(stage);
     GrTexture* fgTex = blend.texture(0);
     GrTexture* bgTex = blend.texture(1);
     fForegroundEffectMatrix.setData(uman,
                                     GrEffect::MakeDivByTextureWHMatrix(fgTex),
@@ skipping 18 matching lines @@
 
     EffectKey bgKey = GrGLEffectMatrix::GenKey(GrEffect::MakeDivByTextureWHMatrix(bgTex),
                                                stage.getCoordChangeMatrix(),
                                                bgTex);
     bgKey <<= GrGLEffectMatrix::kKeyBits;
     EffectKey modeKey = blend.mode() << (2 * GrGLEffectMatrix::kKeyBits);
 
     return  modeKey | bgKey | fgKey;
 }
 #endif