skia/ext/platform_device.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 "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