add localmatrix parameter to shader's asNewEffect

src/effects/gradients/SkSweepGradient.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 "SkSweepGradient.h"
 
@@ skipping 229 matching lines @@
     SkPoint center = {random->nextUScalar1(), random->nextUScalar1()};
 
     SkColor colors[kMaxRandomGradientColors];
     SkScalar stopsArray[kMaxRandomGradientColors];
     SkScalar* stops = stopsArray;
     SkShader::TileMode tmIgnored;
     int colorCount = RandomGradientParams(random, colors, &stops, &tmIgnored);
     SkAutoTUnref<SkShader> shader(SkGradientShader::CreateSweep(center.fX, center.fY,
                                                                 colors, stops, colorCount));
     SkPaint paint;
-    return shader->asNewEffect(context, paint);
+    return shader->asNewEffect(context, paint, NULL);
 }
 
 /////////////////////////////////////////////////////////////////////
 
 void GrGLSweepGradient::emitCode(GrGLShaderBuilder* builder,
                                  const GrDrawEffect&,
                                  EffectKey key,
                                  const char* outputColor,
                                  const char* inputColor,
                                  const TransformedCoordsArray& coords,
@@ skipping 11 matching lines @@
     } else {
         t.printf("atan(- %s.y, -1.0 * %s.x) * 0.1591549430918 + 0.5",
                  coords2D.c_str(), coords2D.c_str());
     }
     this->emitColor(builder, t.c_str(), key,
                           outputColor, inputColor, samplers);
 }
 
 /////////////////////////////////////////////////////////////////////
 
-GrEffectRef* SkSweepGradient::asNewEffect(GrContext* context, const SkPaint&) const {
+GrEffectRef* SkSweepGradient::asNewEffect(GrContext* context, const SkPaint&,
+                                          const SkMatrix* localMatrix) const {
     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);
     return GrSweepGradient::Create(context, *this, matrix);
 }
 
 #else
 
 GrEffectRef* SkSweepGradient::asNewEffect(GrContext*, const SkPaint&) const {
     SkDEBUGFAIL("Should not call in GPU-less build");
     return NULL;
 }
 
 #endif
 
 #ifndef SK_IGNORE_TO_STRING
 void SkSweepGradient::toString(SkString* str) const {
     str->append("SkSweepGradient: (");
 
     str->append("center: (");
     str->appendScalar(fCenter.fX);
     str->append(", ");
     str->appendScalar(fCenter.fY);
     str->append(") ");
 
     this->INHERITED::toString(str);
 
     str->append(")");
 }
 #endif