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1 | 1 |
2 /* | 2 /* |
3 * Copyright 2006 The Android Open Source Project | 3 * Copyright 2006 The Android Open Source Project |
4 * | 4 * |
5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
7 */ | 7 */ |
8 | 8 |
9 | 9 |
10 #ifndef SkCanvas_DEFINED | 10 #ifndef SkCanvas_DEFINED |
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22 #include "SkXfermode.h" | 22 #include "SkXfermode.h" |
23 | 23 |
24 class SkBounder; | 24 class SkBounder; |
25 class SkBaseDevice; | 25 class SkBaseDevice; |
26 class SkDraw; | 26 class SkDraw; |
27 class SkDrawFilter; | 27 class SkDrawFilter; |
28 class SkMetaData; | 28 class SkMetaData; |
29 class SkPicture; | 29 class SkPicture; |
30 class SkRRect; | 30 class SkRRect; |
31 class SkSurface_Base; | 31 class SkSurface_Base; |
| 32 class GrContext; |
32 | 33 |
33 /** \class SkCanvas | 34 /** \class SkCanvas |
34 | 35 |
35 A Canvas encapsulates all of the state about drawing into a device (bitmap). | 36 A Canvas encapsulates all of the state about drawing into a device (bitmap). |
36 This includes a reference to the device itself, and a stack of matrix/clip | 37 This includes a reference to the device itself, and a stack of matrix/clip |
37 values. For any given draw call (e.g. drawRect), the geometry of the object | 38 values. For any given draw call (e.g. drawRect), the geometry of the object |
38 being drawn is transformed by the concatenation of all the matrices in the | 39 being drawn is transformed by the concatenation of all the matrices in the |
39 stack. The transformed geometry is clipped by the intersection of all of | 40 stack. The transformed geometry is clipped by the intersection of all of |
40 the clips in the stack. | 41 the clips in the stack. |
41 | 42 |
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102 SkBaseDevice* getTopDevice(bool updateMatrixClip = false) const; | 103 SkBaseDevice* getTopDevice(bool updateMatrixClip = false) const; |
103 | 104 |
104 /** | 105 /** |
105 * Shortcut for getDevice()->createCompatibleDevice(...). | 106 * Shortcut for getDevice()->createCompatibleDevice(...). |
106 * If getDevice() == NULL, this method does nothing, and returns NULL. | 107 * If getDevice() == NULL, this method does nothing, and returns NULL. |
107 */ | 108 */ |
108 SkBaseDevice* createCompatibleDevice(SkBitmap::Config config, | 109 SkBaseDevice* createCompatibleDevice(SkBitmap::Config config, |
109 int width, int height, | 110 int width, int height, |
110 bool isOpaque); | 111 bool isOpaque); |
111 | 112 |
| 113 /** |
| 114 * Return the GPU context of the device that is associated with the canvas. |
| 115 * For a canvas with non-GPU device, NULL is returned. |
| 116 */ |
| 117 GrContext* getGrContext(); |
| 118 |
112 /////////////////////////////////////////////////////////////////////////// | 119 /////////////////////////////////////////////////////////////////////////// |
113 | 120 |
114 /** | 121 /** |
115 * This enum can be used with read/writePixels to perform a pixel ops to or | 122 * This enum can be used with read/writePixels to perform a pixel ops to or |
116 * from an 8888 config other than Skia's native config (SkPMColor). There | 123 * from an 8888 config other than Skia's native config (SkPMColor). There |
117 * are three byte orders supported: native, BGRA, and RGBA. Each has a | 124 * are three byte orders supported: native, BGRA, and RGBA. Each has a |
118 * premultiplied and unpremultiplied variant. | 125 * premultiplied and unpremultiplied variant. |
119 * | 126 * |
120 * Components of a 8888 pixel can be packed/unpacked from a 32bit word using | 127 * Components of a 8888 pixel can be packed/unpacked from a 32bit word using |
121 * either byte offsets or shift values. Byte offsets are endian-invariant | 128 * either byte offsets or shift values. Byte offsets are endian-invariant |
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1176 fCanvas->endCommentGroup(); | 1183 fCanvas->endCommentGroup(); |
1177 } | 1184 } |
1178 } | 1185 } |
1179 | 1186 |
1180 private: | 1187 private: |
1181 SkCanvas* fCanvas; | 1188 SkCanvas* fCanvas; |
1182 }; | 1189 }; |
1183 #define SkAutoCommentBlock(...) SK_REQUIRE_LOCAL_VAR(SkAutoCommentBlock) | 1190 #define SkAutoCommentBlock(...) SK_REQUIRE_LOCAL_VAR(SkAutoCommentBlock) |
1184 | 1191 |
1185 #endif | 1192 #endif |
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