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