Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(32)

Side by Side Diff: skia/ext/bitmap_platform_device_win.h

Issue 22796028: Updating Chromium to Skia SkBaseDevice/SkBitmapDevice split (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Added TODOs Created 7 years, 3 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View unified diff | Download patch
« no previous file with comments | « skia/ext/bitmap_platform_device_mac.cc ('k') | skia/ext/bitmap_platform_device_win.cc » ('j') | no next file with comments »
Toggle Intra-line Diffs ('i') | Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
OLDNEW
1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 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 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef SKIA_EXT_BITMAP_PLATFORM_DEVICE_WIN_H_ 5 #ifndef SKIA_EXT_BITMAP_PLATFORM_DEVICE_WIN_H_
6 #define SKIA_EXT_BITMAP_PLATFORM_DEVICE_WIN_H_ 6 #define SKIA_EXT_BITMAP_PLATFORM_DEVICE_WIN_H_
7 7
8 #include "base/basictypes.h" 8 #include "base/basictypes.h"
9 #include "base/compiler_specific.h" 9 #include "base/compiler_specific.h"
10 #include "skia/ext/platform_device.h" 10 #include "skia/ext/platform_device.h"
11 #include "skia/ext/refptr.h" 11 #include "skia/ext/refptr.h"
12 12
13 namespace skia { 13 namespace skia {
14 14
15 // A device is basically a wrapper around SkBitmap that provides a surface for 15 // A device is basically a wrapper around SkBitmap that provides a surface for
16 // SkCanvas to draw into. Our device provides a surface Windows can also write 16 // SkCanvas to draw into. Our device provides a surface Windows can also write
17 // to. BitmapPlatformDevice creates a bitmap using CreateDIBSection() in a 17 // to. BitmapPlatformDevice creates a bitmap using CreateDIBSection() in a
18 // format that Skia supports and can then use this to draw ClearType into, etc. 18 // format that Skia supports and can then use this to draw ClearType into, etc.
19 // This pixel data is provided to the bitmap that the device contains so that it 19 // This pixel data is provided to the bitmap that the device contains so that it
20 // can be shared. 20 // can be shared.
21 // 21 //
22 // The device owns the pixel data, when the device goes away, the pixel data 22 // The device owns the pixel data, when the device goes away, the pixel data
23 // also becomes invalid. THIS IS DIFFERENT THAN NORMAL SKIA which uses 23 // also becomes invalid. THIS IS DIFFERENT THAN NORMAL SKIA which uses
24 // reference counting for the pixel data. In normal Skia, you could assign 24 // reference counting for the pixel data. In normal Skia, you could assign
25 // another bitmap to this device's bitmap and everything will work properly. 25 // another bitmap to this device's bitmap and everything will work properly.
26 // For us, that other bitmap will become invalid as soon as the device becomes 26 // For us, that other bitmap will become invalid as soon as the device becomes
27 // invalid, which may lead to subtle bugs. Therefore, DO NOT ASSIGN THE 27 // invalid, which may lead to subtle bugs. Therefore, DO NOT ASSIGN THE
28 // DEVICE'S PIXEL DATA TO ANOTHER BITMAP, make sure you copy instead. 28 // DEVICE'S PIXEL DATA TO ANOTHER BITMAP, make sure you copy instead.
29 class SK_API BitmapPlatformDevice : public SkDevice, public PlatformDevice { 29 class SK_API BitmapPlatformDevice : public SkBitmapDevice, public PlatformDevice {
30 public: 30 public:
31 // Factory function. is_opaque should be set if the caller knows the bitmap 31 // Factory function. is_opaque should be set if the caller knows the bitmap
32 // will be completely opaque and allows some optimizations. 32 // will be completely opaque and allows some optimizations.
33 // 33 //
34 // The |shared_section| parameter is optional (pass NULL for default 34 // The |shared_section| parameter is optional (pass NULL for default
35 // behavior). If |shared_section| is non-null, then it must be a handle to a 35 // behavior). If |shared_section| is non-null, then it must be a handle to a
36 // file-mapping object returned by CreateFileMapping. See CreateDIBSection 36 // file-mapping object returned by CreateFileMapping. See CreateDIBSection
37 // for details. If |shared_section| is null, the bitmap backing store is not 37 // for details. If |shared_section| is null, the bitmap backing store is not
38 // initialized. 38 // initialized.
39 static BitmapPlatformDevice* Create(int width, int height, 39 static BitmapPlatformDevice* Create(int width, int height,
(...skipping 13 matching lines...) Expand all
53 // PlatformDevice overrides 53 // PlatformDevice overrides
54 // Retrieves the bitmap DC, which is the memory DC for our bitmap data. The 54 // Retrieves the bitmap DC, which is the memory DC for our bitmap data. The
55 // bitmap DC is lazy created. 55 // bitmap DC is lazy created.
56 virtual PlatformSurface BeginPlatformPaint() OVERRIDE; 56 virtual PlatformSurface BeginPlatformPaint() OVERRIDE;
57 virtual void EndPlatformPaint() OVERRIDE; 57 virtual void EndPlatformPaint() OVERRIDE;
58 58
59 virtual void DrawToNativeContext(HDC dc, int x, int y, 59 virtual void DrawToNativeContext(HDC dc, int x, int y,
60 const RECT* src_rect) OVERRIDE; 60 const RECT* src_rect) OVERRIDE;
61 61
62 // Loads the given transform and clipping region into the HDC. This is 62 // Loads the given transform and clipping region into the HDC. This is
63 // overridden from SkDevice. 63 // overridden from SkBaseDevice.
64 virtual void setMatrixClip(const SkMatrix& transform, const SkRegion& region, 64 virtual void setMatrixClip(const SkMatrix& transform, const SkRegion& region,
65 const SkClipStack&) OVERRIDE; 65 const SkClipStack&) OVERRIDE;
66 66
67 protected: 67 protected:
68 // Flushes the Windows device context so that the pixel data can be accessed 68 // Flushes the Windows device context so that the pixel data can be accessed
69 // directly by Skia. Overridden from SkDevice, this is called when Skia 69 // directly by Skia. Overridden from SkBaseDevice, this is called when Skia
70 // starts accessing pixel data. 70 // starts accessing pixel data.
71 virtual const SkBitmap& onAccessBitmap(SkBitmap* bitmap) OVERRIDE; 71 virtual const SkBitmap& onAccessBitmap(SkBitmap* bitmap) OVERRIDE;
72 72
73 virtual SkDevice* onCreateCompatibleDevice(SkBitmap::Config, int width, 73 virtual SkBaseDevice* onCreateCompatibleDevice(SkBitmap::Config, int width,
74 int height, bool isOpaque, 74 int height, bool isOpaque,
75 Usage usage) OVERRIDE; 75 Usage usage) OVERRIDE;
76 76
77 private: 77 private:
78 // Reference counted data that can be shared between multiple devices. This 78 // Reference counted data that can be shared between multiple devices. This
79 // allows copy constructors and operator= for devices to work properly. The 79 // allows copy constructors and operator= for devices to work properly. The
80 // bitmaps used by the base device class are already refcounted and copyable. 80 // bitmaps used by the base device class are already refcounted and copyable.
81 class BitmapPlatformDeviceData; 81 class BitmapPlatformDeviceData;
82 82
83 // Private constructor. 83 // Private constructor.
84 BitmapPlatformDevice(const skia::RefPtr<BitmapPlatformDeviceData>& data, 84 BitmapPlatformDevice(const skia::RefPtr<BitmapPlatformDeviceData>& data,
85 const SkBitmap& bitmap); 85 const SkBitmap& bitmap);
86 86
87 // Data associated with this device, guaranteed non-null. 87 // Data associated with this device, guaranteed non-null.
88 skia::RefPtr<BitmapPlatformDeviceData> data_; 88 skia::RefPtr<BitmapPlatformDeviceData> data_;
89 89
90 #ifdef SK_DEBUG 90 #ifdef SK_DEBUG
91 int begin_paint_count_; 91 int begin_paint_count_;
92 #endif 92 #endif
93 93
94 DISALLOW_COPY_AND_ASSIGN(BitmapPlatformDevice); 94 DISALLOW_COPY_AND_ASSIGN(BitmapPlatformDevice);
95 }; 95 };
96 96
97 } // namespace skia 97 } // namespace skia
98 98
99 #endif // SKIA_EXT_BITMAP_PLATFORM_DEVICE_WIN_H_ 99 #endif // SKIA_EXT_BITMAP_PLATFORM_DEVICE_WIN_H_
OLDNEW
« no previous file with comments | « skia/ext/bitmap_platform_device_mac.cc ('k') | skia/ext/bitmap_platform_device_win.cc » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698