metafile_skia_wrapper.cc revision 5821806d5e7f356e8fa4b058a389a808ea183019 
1// Copyright (c) 2012 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
11namespace printing {
12
13namespace {
14
15const char* kMetafileKey = "CrMetafile";
16const char* kCustomScaleKey = "CrCustomScale";
17
18}  // namespace
19
20// static
21void MetafileSkiaWrapper::SetMetafileOnCanvas(const SkCanvas& canvas,
22                                              Metafile* metafile) {
23  MetafileSkiaWrapper* wrapper = NULL;
24  if (metafile)
25    wrapper = new MetafileSkiaWrapper(metafile);
26
27  SkMetaData& meta = skia::getMetaData(canvas);
28  meta.setRefCnt(kMetafileKey, wrapper);
29  SkSafeUnref(wrapper);
30}
31
32// static
33Metafile* MetafileSkiaWrapper::GetMetafileFromCanvas(const SkCanvas& canvas) {
34  SkMetaData& meta = skia::getMetaData(canvas);
35  SkRefCnt* value;
36  if (!meta.findRefCnt(kMetafileKey, &value) || !value)
37    return NULL;
38
39  return static_cast<MetafileSkiaWrapper*>(value)->metafile_;
40}
41
42// static
43void MetafileSkiaWrapper::SetCustomScaleOnCanvas(const SkCanvas& canvas,
44                                                 double scale) {
45  SkMetaData& meta = skia::getMetaData(canvas);
46  meta.setScalar(kCustomScaleKey, SkFloatToScalar(scale));
47}
48
49// static
50bool MetafileSkiaWrapper::GetCustomScaleOnCanvas(const SkCanvas& canvas,
51                                                 double* scale) {
52  SkMetaData& meta = skia::getMetaData(canvas);
53  SkScalar value;
54  if (!meta.findScalar(kCustomScaleKey, &value))
55    return false;
56
57  *scale = SkScalarToFloat(value);
58  return true;
59}
60
61MetafileSkiaWrapper::MetafileSkiaWrapper(Metafile* metafile)
62    : metafile_(metafile) {
63}
64
65}  // namespace printing
66