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(SkDevice* device, PlatformDevice* platform_behaviour) {
  37   SkMetaData& meta_data = device->getMetaData();
  38   meta_data.setPtr(kDevicePlatformBehaviour, platform_behaviour);
  39 }
  40
  41 PlatformDevice* GetPlatformDevice(SkDevice* device) {
  42   SkMetaData& meta_data = device->getMetaData();
  43   PlatformDevice* device_behaviour = NULL;
  44   if (meta_data.findPtr(kDevicePlatformBehaviour,
  45                         reinterpret_cast<void**>(&device_behaviour)))
  46     return device_behaviour;
  47
  48   return NULL;
  49 }
  50
  51 SkMetaData& getMetaData(const SkCanvas& canvas) {
  52   SkDevice* device = canvas.getDevice();
  53   DCHECK(device != NULL);
  54   return device->getMetaData();
  55 }
  56
  57 void SetIsDraftMode(const SkCanvas& canvas, bool draft_mode) {
  58   SetBoolMetaData(canvas, kDraftModeKey, draft_mode);
  59 }
  60
  61 bool IsDraftMode(const SkCanvas& canvas) {
  62   return GetBoolMetaData(canvas, kDraftModeKey);
  63 }
  64
  65 #if defined(OS_MACOSX) || defined(OS_WIN)
  66 void SetIsPreviewMetafile(const SkCanvas& canvas, bool is_preview) {
  67   SetBoolMetaData(canvas, kIsPreviewMetafileKey, is_preview);
  68 }
  69
  70 bool IsPreviewMetafile(const SkCanvas& canvas) {
  71   return GetBoolMetaData(canvas, kIsPreviewMetafileKey);
  72 }
  73 #endif
  74
  75 bool PlatformDevice::SupportsPlatformPaint() {
  76   return true;
  77 }
  78
  79 }  // namespace skia