Make GrGLEffects use an interface to append their code.

src/effects/SkTableColorFilter.cpp

Index: src/effects/SkTableColorFilter.cpp
===================================================================
--- src/effects/SkTableColorFilter.cpp	(revision 8005)
+++ src/effects/SkTableColorFilter.cpp	(working copy)
@@ -289,39 +289,38 @@
 
     static const float kColorScaleFactor = 255.0f / 256.0f;
     static const float kColorOffsetFactor = 1.0f / 512.0f;
-    SkString* code = &builder->fFSCode;
     if (NULL == inputColor) {
         // the input color is solid white (all ones).
         static const float kMaxValue = kColorScaleFactor + kColorOffsetFactor;
-        code->appendf("\t\tvec4 coord = vec4(%f, %f, %f, %f);\n",
-                      kMaxValue, kMaxValue, kMaxValue, kMaxValue);
+        builder->fsCodeAppendf("\t\tvec4 coord = vec4(%f, %f, %f, %f);\n",
+                               kMaxValue, kMaxValue, kMaxValue, kMaxValue);
 
     } else {
-        code->appendf("\t\tfloat nonZeroAlpha = max(%s.a, .0001);\n", inputColor);
-        code->appendf("\t\tvec4 coord = vec4(%s.rgb / nonZeroAlpha, nonZeroAlpha);\n", inputColor);
-        code->appendf("\t\tcoord = coord * %f + vec4(%f, %f, %f, %f);\n",
-                      kColorScaleFactor,
-                      kColorOffsetFactor, kColorOffsetFactor,
-                      kColorOffsetFactor, kColorOffsetFactor);
+        builder->fsCodeAppendf("\t\tfloat nonZeroAlpha = max(%s.a, .0001);\n", inputColor);
+        builder->fsCodeAppendf("\t\tvec4 coord = vec4(%s.rgb / nonZeroAlpha, nonZeroAlpha);\n", inputColor);
+        builder->fsCodeAppendf("\t\tcoord = coord * %f + vec4(%f, %f, %f, %f);\n",
+                              kColorScaleFactor,
+                              kColorOffsetFactor, kColorOffsetFactor,
+                              kColorOffsetFactor, kColorOffsetFactor);
     }
 
-    code->appendf("\t\t%s.a = ", outputColor);
-    builder->appendTextureLookup(code, samplers[0], "vec2(coord.a, 0.125)");
-    code->append(";\n");
+    builder->fsCodeAppendf("\t\t%s.a = ", outputColor);
+    builder->appendTextureLookup(GrGLShaderBuilder::kFragment_ShaderType, samplers[0], "vec2(coord.a, 0.125)");
+    builder->fsCodeAppend(";\n");
 
-    code->appendf("\t\t%s.r = ", outputColor);
-    builder->appendTextureLookup(code, samplers[0], "vec2(coord.r, 0.375)");
-    code->append(";\n");
+    builder->fsCodeAppendf("\t\t%s.r = ", outputColor);
+    builder->appendTextureLookup(GrGLShaderBuilder::kFragment_ShaderType, samplers[0], "vec2(coord.r, 0.375)");
+    builder->fsCodeAppend(";\n");
 
-    code->appendf("\t\t%s.g = ", outputColor);
-    builder->appendTextureLookup(code, samplers[0], "vec2(coord.g, 0.625)");
-    code->append(";\n");
+    builder->fsCodeAppendf("\t\t%s.g = ", outputColor);
+    builder->appendTextureLookup(GrGLShaderBuilder::kFragment_ShaderType, samplers[0], "vec2(coord.g, 0.625)");
+    builder->fsCodeAppend(";\n");
 
-    code->appendf("\t\t%s.b = ", outputColor);
-    builder->appendTextureLookup(code, samplers[0], "vec2(coord.b, 0.875)");
-    code->append(";\n");
+    builder->fsCodeAppendf("\t\t%s.b = ", outputColor);
+    builder->appendTextureLookup(GrGLShaderBuilder::kFragment_ShaderType, samplers[0], "vec2(coord.b, 0.875)");
+    builder->fsCodeAppend(";\n");
 
-    code->appendf("\t\t%s.rgb *= %s.a;\n", outputColor, outputColor);
+    builder->fsCodeAppendf("\t\t%s.rgb *= %s.a;\n", outputColor, outputColor);
 }
 
 GrGLEffect::EffectKey GLColorTableEffect::GenKey(const GrEffectStage&, const GrGLCaps&) {