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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 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 | 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 #pragma once | 7 #pragma once |
8 | 8 |
9 #include "base/basictypes.h" | 9 #include "base/basictypes.h" |
10 #include "base/compiler_specific.h" | 10 #include "base/compiler_specific.h" |
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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 PlatformDevice, public SkDevice { | 29 class SK_API BitmapPlatformDevice : public PlatformDevice, public SkDevice { |
30 public: | 30 public: |
31 // Factory function. The screen DC is used to create the bitmap, and will not | 31 // Factory function. The screen DC is used to create the bitmap, and will not |
32 // be stored beyond this function. is_opaque should be set if the caller | 32 // be stored beyond this function. is_opaque should be set if the caller |
33 // knows the bitmap will be completely opaque and allows some optimizations. | 33 // knows the bitmap will be completely opaque and allows some optimizations. |
34 // | 34 // |
35 // The shared_section parameter is optional (pass NULL for default behavior). | 35 // The |shared_section| parameter is optional (pass NULL for default |
36 // If shared_section is non-null, then it must be a handle to a file-mapping | 36 // behavior). If |shared_section| is non-null, then it must be a handle to a |
37 // object returned by CreateFileMapping. See CreateDIBSection for details. | 37 // file-mapping object returned by CreateFileMapping. See CreateDIBSection |
38 static BitmapPlatformDevice* create(HDC screen_dc, int width, int height, | 38 // for details. If |shared_section| is null, the bitmap backing store is not |
| 39 // initialized. |
| 40 static BitmapPlatformDevice* Create(HDC screen_dc, int width, int height, |
39 bool is_opaque, HANDLE shared_section); | 41 bool is_opaque, HANDLE shared_section); |
40 | 42 |
41 // This version is the same as above but will get the screen DC itself. | 43 // This version is the same as above but will get the screen DC itself. |
42 static BitmapPlatformDevice* create(int width, int height, bool is_opaque, | 44 static BitmapPlatformDevice* Create(int width, int height, bool is_opaque, |
43 HANDLE shared_section); | 45 HANDLE shared_section); |
44 | 46 |
| 47 // Create a BitmapPlatformDevice with no shared section. The bitmap is not |
| 48 // initialized to 0. |
| 49 static BitmapPlatformDevice* Create(int width, int height, bool is_opaque); |
| 50 |
| 51 // Creates a BitmapPlatformDevice instance respecting the parameters as above. |
| 52 // If |is_opaque| is false, then the bitmap is initialzed to 0. |
| 53 static BitmapPlatformDevice* CreateAndClear(int width, int height, |
| 54 bool is_opaque); |
| 55 |
45 virtual ~BitmapPlatformDevice(); | 56 virtual ~BitmapPlatformDevice(); |
46 | 57 |
47 // PlatformDevice overrides | 58 // PlatformDevice overrides |
48 // Retrieves the bitmap DC, which is the memory DC for our bitmap data. The | 59 // Retrieves the bitmap DC, which is the memory DC for our bitmap data. The |
49 // bitmap DC is lazy created. | 60 // bitmap DC is lazy created. |
50 virtual PlatformSurface BeginPlatformPaint() OVERRIDE; | 61 virtual PlatformSurface BeginPlatformPaint() OVERRIDE; |
51 virtual void EndPlatformPaint() OVERRIDE; | 62 virtual void EndPlatformPaint() OVERRIDE; |
52 | 63 |
53 virtual void DrawToNativeContext(HDC dc, int x, int y, | 64 virtual void DrawToNativeContext(HDC dc, int x, int y, |
54 const RECT* src_rect) OVERRIDE; | 65 const RECT* src_rect) OVERRIDE; |
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85 #ifdef SK_DEBUG | 96 #ifdef SK_DEBUG |
86 int begin_paint_count_; | 97 int begin_paint_count_; |
87 #endif | 98 #endif |
88 | 99 |
89 DISALLOW_COPY_AND_ASSIGN(BitmapPlatformDevice); | 100 DISALLOW_COPY_AND_ASSIGN(BitmapPlatformDevice); |
90 }; | 101 }; |
91 | 102 |
92 } // namespace skia | 103 } // namespace skia |
93 | 104 |
94 #endif // SKIA_EXT_BITMAP_PLATFORM_DEVICE_WIN_H_ | 105 #endif // SKIA_EXT_BITMAP_PLATFORM_DEVICE_WIN_H_ |
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