printing/metafile_skia_wrapper.cc

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "printing/metafile_skia_wrapper.h"
   6 #include "skia/ext/platform_device.h"
   7 #include "third_party/skia/include/core/SkCanvas.h"
   8 #include "third_party/skia/include/core/SkDevice.h"
   9 #include "third_party/skia/include/core/SkMetaData.h"
  10
  11 namespace printing {
  12
  13 namespace {
  14
  15 const char* kMetafileKey = "CrMetafile";
  16
  17 }  // namespace
  18
  19 // static
  20 void MetafileSkiaWrapper::SetMetafileOnCanvas(const SkCanvas& canvas,
  21                                               Metafile* metafile) {
  22   MetafileSkiaWrapper* wrapper = NULL;
  23   if (metafile)
  24     wrapper = new MetafileSkiaWrapper(metafile);
  25
  26   SkMetaData& meta = skia::getMetaData(canvas);
  27   meta.setRefCnt(kMetafileKey, wrapper);
  28   SkSafeUnref(wrapper);
  29 }
  30
  31 // static
  32 Metafile* MetafileSkiaWrapper::GetMetafileFromCanvas(const SkCanvas& canvas) {
  33   SkMetaData& meta = skia::getMetaData(canvas);
  34   SkRefCnt* value;
  35   if (!meta.findRefCnt(kMetafileKey, &value) || !value)
  36     return NULL;
  37
  38   return static_cast<MetafileSkiaWrapper*>(value)->metafile_;
  39 }
  40
  41 MetafileSkiaWrapper::MetafileSkiaWrapper(Metafile* metafile)
  42     : metafile_(metafile) {
  43 }
  44
  45 }  // namespace printing