Allow GrGLEffects to produce variable length keys.

src/gpu/effects/GrConfigConversionEffect.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrConfigConversionEffect.h"
 #include "GrContext.h"
 #include "GrTBackendEffectFactory.h"
 #include "GrSimpleTextureEffect.h"
 #include "gl/GrGLEffect.h"
 #include "gl/GrGLShaderBuilder.h"
 #include "SkMatrix.h"
 
 class GrGLConfigConversionEffect : public GrGLEffect {
 public:
     GrGLConfigConversionEffect(const GrBackendEffectFactory& factory,
                                const GrDrawEffect& drawEffect)
     : INHERITED (factory) {
         const GrConfigConversionEffect& effect = drawEffect.castEffect<GrConfigConversionEffect>();
         fSwapRedAndBlue = effect.swapsRedAndBlue();
         fPMConversion = effect.pmConversion();
     }
 
     virtual void emitCode(GrGLShaderBuilder* builder,
                           const GrDrawEffect&,
-                          EffectKey key,
+                          const GrEffectKey& key,
                           const char* outputColor,
                           const char* inputColor,
                           const TransformedCoordsArray& coords,
                           const TextureSamplerArray& samplers) SK_OVERRIDE {
         builder->fsCodeAppendf("\t\t%s = ", outputColor);
         builder->fsAppendTextureLookup(samplers[0], coords[0].c_str(), coords[0].type());
         builder->fsCodeAppend(";\n");
         if (GrConfigConversionEffect::kNone_PMConversion == fPMConversion) {
             SkASSERT(fSwapRedAndBlue);
             builder->fsCodeAppendf("\t%s = %s.bgra;\n", outputColor, outputColor);
@@ skipping 25 matching lines @@
                 default:
                     SkFAIL("Unknown conversion op.");
                     break;
             }
         }
         SkString modulate;
         GrGLSLMulVarBy4f(&modulate, 2, outputColor, inputColor);
         builder->fsCodeAppend(modulate.c_str());
     }
 
-    static inline EffectKey GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&) {
+    static inline void GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&,
+                              GrEffectKeyBuilder* b) {
         const GrConfigConversionEffect& conv = drawEffect.castEffect<GrConfigConversionEffect>();
-        return static_cast<EffectKey>(conv.swapsRedAndBlue()) | (conv.pmConversion() << 1);
+        uint32_t key = (conv.swapsRedAndBlue() ? 0 : 1) | (conv.pmConversion() << 1);
+        b->add32(key);
     }
 
 private:
     bool                                    fSwapRedAndBlue;
     GrConfigConversionEffect::PMConversion  fPMConversion;
 
     typedef GrGLEffect INHERITED;
 
 };
 
@@ skipping 176 matching lines @@
             kNone_PMConversion != pmConversion) {
             // The PM conversions assume colors are 0..255
             return NULL;
         }
         return SkNEW_ARGS(GrConfigConversionEffect, (texture,
                                                      swapRedAndBlue,
                                                      pmConversion,
                                                      matrix));
     }
 }