use Descriptor struct to encapsulate all the common paramaeters between our various gradient types.…

src/effects/gradients/SkGradientShaderPriv.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkGradientShaderPriv_DEFINED
 #define SkGradientShaderPriv_DEFINED
 
@@ skipping 64 matching lines @@
 static const TileProc gTileProcs[] = {
     clamp_tileproc,
     repeat_tileproc,
     mirror_tileproc
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 class SkGradientShaderBase : public SkShader {
 public:
-    SkGradientShaderBase(const SkColor colors[], const SkScalar pos[],
-                int colorCount, SkShader::TileMode mode, SkUnitMapper* mapper);
+    struct Descriptor {
+        Descriptor() {
+            sk_bzero(this, sizeof(*this));
+            fTileMode = SkShader::kClamp_TileMode;
+        }
+        
+        const SkColor*      fColors;
+        const SkScalar*     fPos;
+        int                 fCount;
+        SkShader::TileMode  fTileMode;
+        SkUnitMapper*       fMapper;
+    };
+
+public:
+    SkGradientShaderBase(const Descriptor& desc);
     virtual ~SkGradientShaderBase();
 
     virtual bool setContext(const SkBitmap&, const SkPaint&, const SkMatrix&) SK_OVERRIDE;
     virtual uint32_t getFlags() SK_OVERRIDE { return fFlags; }
     virtual bool isOpaque() const SK_OVERRIDE;
 
     void getGradientTableBitmap(SkBitmap*) const;
 
     enum {
         /// Seems like enough for visual accuracy. TODO: if pos[] deserves
@@ skipping 228 matching lines @@
     SkScalar fCachedYCoord;
     GrGLUniformManager::UniformHandle fFSYUni;
     GrGLEffectMatrix fEffectMatrix;
 
     typedef GrGLEffect INHERITED;
 };
 
 #endif
 
 #endif