metafile_skia_wrapper.cc revision 1320f92c476a1ad9d19dba2a48c72b75566198e9
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 "skia/ext/refptr.h" 8#include "third_party/skia/include/core/SkCanvas.h" 9#include "third_party/skia/include/core/SkDevice.h" 10#include "third_party/skia/include/core/SkMetaData.h" 11 12namespace printing { 13 14namespace { 15 16const char* kMetafileKey = "CrMetafile"; 17const char* kCustomScaleKey = "CrCustomScale"; 18 19} // namespace 20 21// static 22void MetafileSkiaWrapper::SetMetafileOnCanvas(const SkCanvas& canvas, 23 PdfMetafileSkia* metafile) { 24 skia::RefPtr<MetafileSkiaWrapper> wrapper; 25 if (metafile) 26 wrapper = skia::AdoptRef(new MetafileSkiaWrapper(metafile)); 27 28 SkMetaData& meta = skia::getMetaData(canvas); 29 meta.setRefCnt(kMetafileKey, wrapper.get()); 30} 31 32// static 33PdfMetafileSkia* MetafileSkiaWrapper::GetMetafileFromCanvas( 34 const SkCanvas& canvas) { 35 SkMetaData& meta = skia::getMetaData(canvas); 36 SkRefCnt* value; 37 if (!meta.findRefCnt(kMetafileKey, &value) || !value) 38 return NULL; 39 40 return static_cast<MetafileSkiaWrapper*>(value)->metafile_; 41} 42 43// static 44void MetafileSkiaWrapper::SetCustomScaleOnCanvas(const SkCanvas& canvas, 45 double scale) { 46 SkMetaData& meta = skia::getMetaData(canvas); 47 meta.setScalar(kCustomScaleKey, SkFloatToScalar(scale)); 48} 49 50// static 51bool MetafileSkiaWrapper::GetCustomScaleOnCanvas(const SkCanvas& canvas, 52 double* scale) { 53 SkMetaData& meta = skia::getMetaData(canvas); 54 SkScalar value; 55 if (!meta.findScalar(kCustomScaleKey, &value)) 56 return false; 57 58 *scale = SkScalarToFloat(value); 59 return true; 60} 61 62MetafileSkiaWrapper::MetafileSkiaWrapper(PdfMetafileSkia* metafile) 63 : metafile_(metafile) { 64} 65 66} // namespace printing 67