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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_LINUX_H_ | 5 #ifndef SKIA_EXT_BITMAP_PLATFORM_DEVICE_LINUX_H_ |
6 #define SKIA_EXT_BITMAP_PLATFORM_DEVICE_LINUX_H_ | 6 #define SKIA_EXT_BITMAP_PLATFORM_DEVICE_LINUX_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/memory/ref_counted.h" | 11 #include "base/memory/ref_counted.h" |
11 #include "skia/ext/platform_device_linux.h" | 12 #include "skia/ext/platform_device.h" |
12 | 13 |
13 typedef struct _cairo_surface cairo_surface_t; | 14 typedef struct _cairo_surface cairo_surface_t; |
14 | 15 |
15 // ----------------------------------------------------------------------------- | 16 // ----------------------------------------------------------------------------- |
16 // Image byte ordering on Linux: | 17 // Image byte ordering on Linux: |
17 // | 18 // |
18 // Pixels are packed into 32-bit words these days. Even for 24-bit images, | 19 // Pixels are packed into 32-bit words these days. Even for 24-bit images, |
19 // often 8-bits will be left unused for alignment reasons. Thus, when you see | 20 // often 8-bits will be left unused for alignment reasons. Thus, when you see |
20 // ARGB as the byte order you have to wonder if that's in memory order or | 21 // ARGB as the byte order you have to wonder if that's in memory order or |
21 // little-endian order. Here I'll write A.R.G.B to specifiy the memory order. | 22 // little-endian order. Here I'll write A.R.G.B to specifiy the memory order. |
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49 // to store the backing buffer. This buffer is BGRA in memory (on little-endian | 50 // to store the backing buffer. This buffer is BGRA in memory (on little-endian |
50 // machines). | 51 // machines). |
51 // | 52 // |
52 // For now we are also using Cairo to paint to the Drawables so we provide an | 53 // For now we are also using Cairo to paint to the Drawables so we provide an |
53 // accessor for getting the surface. | 54 // accessor for getting the surface. |
54 // | 55 // |
55 // This is all quite ok for test_shell. In the future we will want to use | 56 // This is all quite ok for test_shell. In the future we will want to use |
56 // shared memory between the renderer and the main process at least. In this | 57 // shared memory between the renderer and the main process at least. In this |
57 // case we'll probably create the buffer from a precreated region of memory. | 58 // case we'll probably create the buffer from a precreated region of memory. |
58 // ----------------------------------------------------------------------------- | 59 // ----------------------------------------------------------------------------- |
59 class BitmapPlatformDevice : public PlatformDevice { | 60 class BitmapPlatformDevice : public PlatformDevice, public SkDevice { |
60 // A reference counted cairo surface | 61 // A reference counted cairo surface |
61 class BitmapPlatformDeviceData; | 62 class BitmapPlatformDeviceData; |
62 | 63 |
63 public: | 64 public: |
64 // Create a BitmapPlatformDeviceLinux from an already constructed bitmap; | 65 // Create a BitmapPlatformDeviceLinux from an already constructed bitmap; |
65 // you should probably be using Create(). This may become private later if | 66 // you should probably be using Create(). This may become private later if |
66 // we ever have to share state between some native drawing UI and Skia, like | 67 // we ever have to share state between some native drawing UI and Skia, like |
67 // the Windows and Mac versions of this class do. | 68 // the Windows and Mac versions of this class do. |
68 // | 69 // |
69 // This object takes ownership of @data. | 70 // This object takes ownership of @data. |
70 BitmapPlatformDevice(const SkBitmap& other, BitmapPlatformDeviceData* data); | 71 BitmapPlatformDevice(const SkBitmap& other, BitmapPlatformDeviceData* data); |
71 virtual ~BitmapPlatformDevice(); | 72 virtual ~BitmapPlatformDevice(); |
72 | 73 |
73 static BitmapPlatformDevice* Create(int width, int height, bool is_opaque); | 74 static BitmapPlatformDevice* Create(int width, int height, bool is_opaque); |
74 | 75 |
75 // This doesn't take ownership of |data| | 76 // This doesn't take ownership of |data| |
76 static BitmapPlatformDevice* Create(int width, int height, | 77 static BitmapPlatformDevice* Create(int width, int height, bool is_opaque, |
77 bool is_opaque, uint8_t* data); | 78 uint8_t* data); |
78 | 79 |
79 virtual void MakeOpaque(int x, int y, int width, int height); | 80 virtual void MakeOpaque(int x, int y, int width, int height) OVERRIDE; |
80 | 81 |
81 // Overridden from SkDevice: | 82 // Overridden from SkDevice: |
82 virtual void setMatrixClip(const SkMatrix& transform, const SkRegion& region, | 83 virtual void setMatrixClip(const SkMatrix& transform, const SkRegion& region, |
83 const SkClipStack&); | 84 const SkClipStack&) OVERRIDE; |
84 | 85 |
85 // Overridden from PlatformDevice: | 86 // Overridden from PlatformDevice: |
86 virtual cairo_t* BeginPlatformPaint(); | 87 virtual cairo_t* BeginPlatformPaint() OVERRIDE; |
| 88 virtual void DrawToNativeContext(PlatformSurface surface, int x, int y, |
| 89 const PlatformRect* src_rect) OVERRIDE; |
87 | 90 |
88 protected: | 91 protected: |
89 virtual SkDevice* onCreateCompatibleDevice(SkBitmap::Config, int width, | 92 virtual SkDevice* onCreateCompatibleDevice(SkBitmap::Config, int width, |
90 int height, bool isOpaque, | 93 int height, bool isOpaque, |
91 Usage usage); | 94 Usage usage) OVERRIDE; |
92 | 95 |
93 private: | 96 private: |
94 static BitmapPlatformDevice* Create(int width, int height, bool is_opaque, | 97 static BitmapPlatformDevice* Create(int width, int height, bool is_opaque, |
95 cairo_surface_t* surface); | 98 cairo_surface_t* surface); |
96 | 99 |
97 scoped_refptr<BitmapPlatformDeviceData> data_; | 100 scoped_refptr<BitmapPlatformDeviceData> data_; |
98 | 101 |
99 DISALLOW_COPY_AND_ASSIGN(BitmapPlatformDevice); | 102 DISALLOW_COPY_AND_ASSIGN(BitmapPlatformDevice); |
100 }; | 103 }; |
101 | 104 |
102 } // namespace skia | 105 } // namespace skia |
103 | 106 |
104 #endif // SKIA_EXT_BITMAP_PLATFORM_DEVICE_LINUX_H_ | 107 #endif // SKIA_EXT_BITMAP_PLATFORM_DEVICE_LINUX_H_ |
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