Allow GrGLEffects to produce variable length keys.

src/effects/gradients/SkLinearGradient.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 "SkLinearGradient.h"
 
 static inline int repeat_bits(int x, const int bits) {
@@ skipping 443 matching lines @@
 class GrGLLinearGradient : public GrGLGradientEffect {
 public:
 
     GrGLLinearGradient(const GrBackendEffectFactory& factory, const GrDrawEffect&)
                        : INHERITED (factory) { }
 
     virtual ~GrGLLinearGradient() { }
 
     virtual void emitCode(GrGLShaderBuilder*,
                           const GrDrawEffect&,
-                          EffectKey,
+                          const GrEffectKey&,
                           const char* outputColor,
                           const char* inputColor,
                           const TransformedCoordsArray&,
                           const TextureSamplerArray&) SK_OVERRIDE;
 
-    static EffectKey GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&) {
-        return GenBaseGradientKey(drawEffect);
+    static void GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&, GrEffectKeyBuilder* b) {
+        b->add32(GenBaseGradientKey(drawEffect));
     }
 
 private:
 
     typedef GrGLGradientEffect INHERITED;
 };
 
 /////////////////////////////////////////////////////////////////////
 
 class GrLinearGradient : public GrGradientEffect {
@@ skipping 49 matching lines @@
     GrColor paintColor;
     GrEffect* effect;
     SkAssertResult(shader->asNewEffect(context, paint, NULL, &paintColor, &effect));
     return effect;
 }
 
 /////////////////////////////////////////////////////////////////////
 
 void GrGLLinearGradient::emitCode(GrGLShaderBuilder* builder,
                                   const GrDrawEffect&,
-                                  EffectKey key,
+                                  const GrEffectKey& key,
                                   const char* outputColor,
                                   const char* inputColor,
                                   const TransformedCoordsArray& coords,
                                   const TextureSamplerArray& samplers) {
-    this->emitUniforms(builder, key);
+    uint32_t baseKey = key.get32(0);
+    this->emitUniforms(builder, baseKey);
     SkString t = builder->ensureFSCoords2D(coords, 0);
     t.append(".x");
-    this->emitColor(builder, t.c_str(), key, outputColor, inputColor, samplers);
+    this->emitColor(builder, t.c_str(), baseKey, outputColor, inputColor, samplers);
 }
 
 /////////////////////////////////////////////////////////////////////
 
 bool SkLinearGradient::asNewEffect(GrContext* context, const SkPaint& paint,
                                    const SkMatrix* localMatrix, GrColor* paintColor,
                                    GrEffect** effect)  const {
     SkASSERT(NULL != context);
     
     SkMatrix matrix;
@@ skipping 31 matching lines @@
     str->append("SkLinearGradient (");
 
     str->appendf("start: (%f, %f)", fStart.fX, fStart.fY);
     str->appendf(" end: (%f, %f) ", fEnd.fX, fEnd.fY);
 
     this->INHERITED::toString(str);
 
     str->append(")");
 }
 #endif