create struct to hold all the params passed around for shader::context

src/effects/gradients/SkRadialGradient.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 "SkRadialGradient.h"
 #include "SkRadialGradient_Table.h"
@@ skipping 143 matching lines @@
     // make sure our table is insync with our current #define for kSQRT_TABLE_SIZE
     SkASSERT(sizeof(gSqrt8Table) == kSQRT_TABLE_SIZE);
 
     rad_to_unit_matrix(center, radius, &fPtsToUnit);
 }
 
 size_t SkRadialGradient::contextSize() const {
     return sizeof(RadialGradientContext);
 }
 
-SkShader::Context* SkRadialGradient::createContext(const SkBitmap& device, const SkPaint& paint,
-                                                   const SkMatrix& matrix, void* storage) const {
-    if (!this->validContext(device, paint, matrix)) {
+SkShader::Context* SkRadialGradient::createContext(const ContextRec& rec, void* storage) const {
+    if (!this->validContext(rec)) {
         return NULL;
     }
 
-    return SkNEW_PLACEMENT_ARGS(storage, RadialGradientContext, (*this, device, paint, matrix));
+    return SkNEW_PLACEMENT_ARGS(storage, RadialGradientContext, (*this, rec));
 }
 
 SkRadialGradient::RadialGradientContext::RadialGradientContext(
-        const SkRadialGradient& shader, const SkBitmap& device,
-        const SkPaint& paint, const SkMatrix& matrix)
-    : INHERITED(shader, device, paint, matrix) {}
+        const SkRadialGradient& shader, const ContextRec& rec)
+    : INHERITED(shader, rec) {}
 
 void SkRadialGradient::RadialGradientContext::shadeSpan16(int x, int y, uint16_t* dstCParam,
                                                           int count) {
     SkASSERT(count > 0);
 
     const SkRadialGradient& radialGradient = static_cast<const SkRadialGradient&>(fShader);
 
     uint16_t* SK_RESTRICT dstC = dstCParam;
 
     SkPoint             srcPt;
@@ skipping 408 matching lines @@
     str->appendScalar(fCenter.fY);
     str->append(") radius: ");
     str->appendScalar(fRadius);
     str->append(" ");
 
     this->INHERITED::toString(str);
 
     str->append(")");
 }
 #endif