Move SkShader::fLocalMatrix into SkShader constructor.

src/pdf/SkPDFDeviceFlattener.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkPDFDeviceFlattener.h"
 
 #include "SkDraw.h"
 
 static SkISize SkSizeToISize(const SkSize& size) {
     return SkISize::Make(SkScalarRoundToInt(size.width()), SkScalarRoundToInt(size.height()));
 }
 
 SkPDFDeviceFlattener::SkPDFDeviceFlattener(const SkSize& pageSize, const SkRect* trimBox)
             : SkPDFDevice(SkSizeToISize(pageSize),
                           SkSizeToISize(pageSize),
                           SkMatrix::I()) {
     // TODO(edisonn): store the trimbox on emit.
 }
 
 SkPDFDeviceFlattener::~SkPDFDeviceFlattener() {
 }
 
 static void flattenPaint(const SkDraw& d, SkPaint* paint) {
     if (paint->getShader()) {
         SkMatrix local = paint->getShader()->getLocalMatrix();
         local.preConcat(*d.fMatrix);
-        paint->getShader()->setLocalMatrix(local);
+        paint->setShader(SkShader::CreateLocalMatrixWrapper(paint->getShader(), local));

[scroggo, 2014/04/24 17:02:53]

Don't we need to unref this new shader?

     }
 }
 
 void SkPDFDeviceFlattener::drawPoints(const SkDraw& d, SkCanvas::PointMode mode,
                                       size_t count, const SkPoint points[],
                                       const SkPaint& paint) {
     if (!mustFlatten(d)) {
         INHERITED::drawPoints(d, mode, count, points, paint);
         return;
     }
@@ skipping 105 matching lines @@
 bool SkPDFDeviceFlattener::mustFlatten(const SkDraw& d) const {
     // TODO(edisonn): testability, add flag to force return true.
     return d.fMatrix->hasPerspective();
 }
 
 bool SkPDFDeviceFlattener::mustPathText(const SkDraw& d, const SkPaint&) {
     // TODO(edisonn): testability, add flag to force return true.
     // TODO(edisonn): TBD: How to flatten MaskFilter.
     return d.fMatrix->hasPerspective();
 }