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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/compiler_specific.h" | 8 #include "base/compiler_specific.h" |
9 #include "base/macros.h" | 9 #include "base/macros.h" |
10 #include "skia/ext/platform_device.h" | 10 #include "skia/ext/platform_device.h" |
11 | 11 |
12 namespace skia { | 12 namespace skia { |
13 | 13 |
14 // A device is basically a wrapper around SkBitmap that provides a surface for | 14 // A device is basically a wrapper around SkBitmap that provides a surface for |
15 // SkCanvas to draw into. Our device provides a surface Windows can also write | 15 // SkCanvas to draw into. Our device provides a surface Windows can also write |
16 // to. BitmapPlatformDevice creates a bitmap using CreateDIBSection() in a | 16 // to. BitmapPlatformDevice creates a bitmap using CreateDIBSection() in a |
17 // format that Skia supports and can then use this to draw ClearType into, etc. | 17 // format that Skia supports and can then use this to draw ClearType into, etc. |
18 // This pixel data is provided to the bitmap that the device contains so that it | 18 // This pixel data is provided to the bitmap that the device contains so that it |
19 // can be shared. | 19 // can be shared. |
20 class SK_API BitmapPlatformDevice final : public SkBitmapDevice, | 20 class SK_API BitmapPlatformDevice : public SkBitmapDevice, |
21 public PlatformDevice { | 21 public PlatformDevice { |
22 public: | 22 public: |
23 // Factory function. is_opaque should be set if the caller knows the bitmap | 23 // Factory function. is_opaque should be set if the caller knows the bitmap |
24 // will be completely opaque and allows some optimizations. | 24 // will be completely opaque and allows some optimizations. |
25 // | 25 // |
26 // The |shared_section| parameter is optional (pass NULL for default | 26 // The |shared_section| parameter is optional (pass NULL for default |
27 // behavior). If |shared_section| is non-null, then it must be a handle to a | 27 // behavior). If |shared_section| is non-null, then it must be a handle to a |
28 // file-mapping object returned by CreateFileMapping. See CreateDIBSection | 28 // file-mapping object returned by CreateFileMapping. See CreateDIBSection |
29 // for details. If |shared_section| is null, the bitmap backing store is not | 29 // for details. If |shared_section| is null, the bitmap backing store is not |
30 // initialized. | 30 // initialized. |
31 static BitmapPlatformDevice* Create(int width, int height, | 31 static BitmapPlatformDevice* Create(int width, int height, |
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71 // Loads the current transform and clip into the context. Can be called even | 71 // Loads the current transform and clip into the context. Can be called even |
72 // when |hbitmap_| is NULL (will be a NOP). | 72 // when |hbitmap_| is NULL (will be a NOP). |
73 void LoadConfig(const SkMatrix& transform, const SkIRect& clip_bounds); | 73 void LoadConfig(const SkMatrix& transform, const SkIRect& clip_bounds); |
74 | 74 |
75 DISALLOW_COPY_AND_ASSIGN(BitmapPlatformDevice); | 75 DISALLOW_COPY_AND_ASSIGN(BitmapPlatformDevice); |
76 }; | 76 }; |
77 | 77 |
78 } // namespace skia | 78 } // namespace skia |
79 | 79 |
80 #endif // SKIA_EXT_BITMAP_PLATFORM_DEVICE_WIN_H_ | 80 #endif // SKIA_EXT_BITMAP_PLATFORM_DEVICE_WIN_H_ |
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