add localmatrix parameter to shader's asNewEffect

src/effects/gradients/SkTwoPointRadialGradient.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 "SkTwoPointRadialGradient.h"
 
@@ skipping 512 matching lines @@
     SkColor colors[kMaxRandomGradientColors];
     SkScalar stopsArray[kMaxRandomGradientColors];
     SkScalar* stops = stopsArray;
     SkShader::TileMode tm;
     int colorCount = RandomGradientParams(random, colors, &stops, &tm);
     SkAutoTUnref<SkShader> shader(SkGradientShader::CreateTwoPointRadial(center1, radius1,
                                                                          center2, radius2,
                                                                          colors, stops, colorCount,
                                                                          tm));
     SkPaint paint;
-    return shader->asNewEffect(context, paint);
+    return shader->asNewEffect(context, paint, NULL);
 }
 
 /////////////////////////////////////////////////////////////////////
 
 GrGLRadial2Gradient::GrGLRadial2Gradient(const GrBackendEffectFactory& factory,
                                          const GrDrawEffect& drawEffect)
     : INHERITED(factory)
     , fVSVaryingName(NULL)
     , fFSVaryingName(NULL)
     , fCachedCenter(SK_ScalarMax)
@@ skipping 119 matching lines @@
 
     EffectKey key = GenBaseGradientKey(drawEffect);
     if (drawEffect.castEffect<GrRadial2Gradient>().isDegenerate()) {
         key |= kIsDegenerate;
     }
     return key;
 }
 
 /////////////////////////////////////////////////////////////////////
 
-GrEffectRef* SkTwoPointRadialGradient::asNewEffect(GrContext* context, const SkPaint&) const {
+GrEffectRef* SkTwoPointRadialGradient::asNewEffect(GrContext* context, const SkPaint&,
+                                                   const SkMatrix* localMatrix) const {
     SkASSERT(NULL != context);
     // invert the localM, translate to center1 (fPtsToUni), rotate so center2 is on x axis.
     SkMatrix matrix;
     if (!this->getLocalMatrix().invert(&matrix)) {
         return NULL;
     }
+    if (localMatrix) {
+        SkMatrix inv;
+        if (!localMatrix->invert(&inv)) {
+            return NULL;
+        }
+        matrix.postConcat(inv);
+    }
     matrix.postConcat(fPtsToUnit);
 
     SkScalar diffLen = fDiff.length();
     if (0 != diffLen) {
         SkScalar invDiffLen = SkScalarInvert(diffLen);
         SkMatrix rot;
         rot.setSinCos(-SkScalarMul(invDiffLen, fDiff.fY),
                        SkScalarMul(invDiffLen, fDiff.fX));
         matrix.postConcat(rot);
     }
 
     return GrRadial2Gradient::Create(context, *this, matrix, fTileMode);
 }
 
 #else
 
 GrEffectRef* SkTwoPointRadialGradient::asNewEffect(GrContext*, const SkPaint&) const {
     SkDEBUGFAIL("Should not call in GPU-less build");
     return NULL;
 }
 
 #endif