Allow GrGLEffects to produce variable length keys.

src/effects/SkAlphaThresholdFilter.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 "SkAlphaThresholdFilter.h"
 #include "SkBitmap.h"
 #include "SkReadBuffer.h"
@@ skipping 100 matching lines @@
 
     typedef GrEffect INHERITED;
 };
 
 class GrGLAlphaThresholdEffect : public GrGLEffect {
 public:
     GrGLAlphaThresholdEffect(const GrBackendEffectFactory&, const GrDrawEffect&);
 
     virtual void emitCode(GrGLShaderBuilder*,
                           const GrDrawEffect&,
-                          EffectKey,
+                          const GrEffectKey&,
                           const char* outputColor,
                           const char* inputColor,
                           const TransformedCoordsArray&,
                           const TextureSamplerArray&) SK_OVERRIDE;
 
     virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE;
 
 private:
 
     GrGLUniformManager::UniformHandle       fInnerThresholdVar;
     GrGLUniformManager::UniformHandle       fOuterThresholdVar;
 
     typedef GrGLEffect INHERITED;
 };
 
 GrGLAlphaThresholdEffect::GrGLAlphaThresholdEffect(const GrBackendEffectFactory& factory, const GrDrawEffect&)
     : INHERITED(factory) {
 }
 
 void GrGLAlphaThresholdEffect::emitCode(GrGLShaderBuilder* builder,
                                         const GrDrawEffect&,
-                                        EffectKey key,
+                                        const GrEffectKey& key,
                                         const char* outputColor,
                                         const char* inputColor,
                                         const TransformedCoordsArray& coords,
                                         const TextureSamplerArray& samplers) {
     SkString coords2D = builder->ensureFSCoords2D(coords, 0);
     SkString maskCoords2D = builder->ensureFSCoords2D(coords, 1);
     fInnerThresholdVar = builder->addUniform(
         GrGLShaderBuilder::kFragment_Visibility,
         kFloat_GrSLType, "inner_threshold");
     fOuterThresholdVar = builder->addUniform(
@@ skipping 206 matching lines @@
                                                   (U8CPU)(SkColorGetG(source) * scale),
                                                   (U8CPU)(SkColorGetB(source) * scale));
                 }
             }
             dptr[y * dst->width() + x] = output_color;
         }
     }
 
     return true;
 }