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      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 "base/logging.h"
      6 #include "skia/ext/platform_device.h"
      7 
      8 #include "third_party/skia/include/core/SkMetaData.h"
      9 
     10 namespace skia {
     11 
     12 namespace {
     13 
     14 const char* kDevicePlatformBehaviour = "CrDevicePlatformBehaviour";
     15 const char* kDraftModeKey = "CrDraftMode";
     16 
     17 #if defined(OS_MACOSX) || defined(OS_WIN)
     18 const char* kIsPreviewMetafileKey = "CrIsPreviewMetafile";
     19 #endif
     20 
     21 void SetBoolMetaData(const SkCanvas& canvas, const char* key,  bool value) {
     22   SkMetaData& meta = skia::getMetaData(canvas);
     23   meta.setBool(key, value);
     24 }
     25 
     26 bool GetBoolMetaData(const SkCanvas& canvas, const char* key) {
     27   bool value;
     28   SkMetaData& meta = skia::getMetaData(canvas);
     29   if (!meta.findBool(key, &value))
     30     value = false;
     31   return value;
     32 }
     33 
     34 }  // namespace
     35 
     36 void SetPlatformDevice(SkBaseDevice* device, PlatformDevice* platform_behaviour) {
     37   SkMetaData& meta_data = device->getMetaData();
     38   meta_data.setPtr(kDevicePlatformBehaviour, platform_behaviour);
     39 }
     40 
     41 PlatformDevice* GetPlatformDevice(SkBaseDevice* device) {
     42   if (device) {
     43     SkMetaData& meta_data = device->getMetaData();
     44     PlatformDevice* device_behaviour = NULL;
     45     if (meta_data.findPtr(kDevicePlatformBehaviour,
     46                           reinterpret_cast<void**>(&device_behaviour)))
     47       return device_behaviour;
     48   }
     49   return NULL;
     50 }
     51 
     52 SkMetaData& getMetaData(const SkCanvas& canvas) {
     53   SkBaseDevice* device = canvas.getDevice();
     54   DCHECK(device != NULL);
     55   return device->getMetaData();
     56 }
     57 
     58 void SetIsDraftMode(const SkCanvas& canvas, bool draft_mode) {
     59   SetBoolMetaData(canvas, kDraftModeKey, draft_mode);
     60 }
     61 
     62 bool IsDraftMode(const SkCanvas& canvas) {
     63   return GetBoolMetaData(canvas, kDraftModeKey);
     64 }
     65 
     66 #if defined(OS_MACOSX) || defined(OS_WIN)
     67 void SetIsPreviewMetafile(const SkCanvas& canvas, bool is_preview) {
     68   SetBoolMetaData(canvas, kIsPreviewMetafileKey, is_preview);
     69 }
     70 
     71 bool IsPreviewMetafile(const SkCanvas& canvas) {
     72   return GetBoolMetaData(canvas, kIsPreviewMetafileKey);
     73 }
     74 #endif
     75 
     76 bool PlatformDevice::SupportsPlatformPaint() {
     77   return true;
     78 }
     79 
     80 }  // namespace skia
     81