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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_PLATFORM_CANVAS_H_ | 5 #ifndef SKIA_EXT_PLATFORM_CANVAS_H_ |
| 6 #define SKIA_EXT_PLATFORM_CANVAS_H_ | 6 #define SKIA_EXT_PLATFORM_CANVAS_H_ |
| 7 | 7 |
| 8 // The platform-specific device will include the necessary platform headers | 8 // The platform-specific device will include the necessary platform headers |
| 9 // to get the surface type. | 9 // to get the surface type. |
| 10 #include "base/basictypes.h" | 10 #include "base/basictypes.h" |
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| 67 uint8_t* data, | 67 uint8_t* data, |
| 68 OnFailureType failure_type); | 68 OnFailureType failure_type); |
| 69 #endif | 69 #endif |
| 70 | 70 |
| 71 static inline SkCanvas* CreatePlatformCanvas(int width, | 71 static inline SkCanvas* CreatePlatformCanvas(int width, |
| 72 int height, | 72 int height, |
| 73 bool is_opaque) { | 73 bool is_opaque) { |
| 74 return CreatePlatformCanvas(width, height, is_opaque, 0, CRASH_ON_FAILURE); | 74 return CreatePlatformCanvas(width, height, is_opaque, 0, CRASH_ON_FAILURE); |
| 75 } | 75 } |
| 76 | 76 |
| 77 SK_API SkCanvas* CreateCanvas(const skia::RefPtr<SkDevice>& device, | 77 SK_API SkCanvas* CreateCanvas(const skia::RefPtr<SkBaseDevice>& device, |
| 78 OnFailureType failure_type); | 78 OnFailureType failure_type); |
| 79 | 79 |
| 80 static inline SkCanvas* CreateBitmapCanvas(int width, | 80 static inline SkCanvas* CreateBitmapCanvas(int width, |
| 81 int height, | 81 int height, |
| 82 bool is_opaque) { | 82 bool is_opaque) { |
| 83 return CreatePlatformCanvas(width, height, is_opaque, 0, CRASH_ON_FAILURE); | 83 return CreatePlatformCanvas(width, height, is_opaque, 0, CRASH_ON_FAILURE); |
| 84 } | 84 } |
| 85 | 85 |
| 86 static inline SkCanvas* TryCreateBitmapCanvas(int width, | 86 static inline SkCanvas* TryCreateBitmapCanvas(int width, |
| 87 int height, | 87 int height, |
| 88 bool is_opaque) { | 88 bool is_opaque) { |
| 89 return CreatePlatformCanvas(width, height, is_opaque, 0, | 89 return CreatePlatformCanvas(width, height, is_opaque, 0, |
| 90 RETURN_NULL_ON_FAILURE); | 90 RETURN_NULL_ON_FAILURE); |
| 91 } | 91 } |
| 92 | 92 |
| 93 // Return the stride (length of a line in bytes) for the given width. Because | 93 // Return the stride (length of a line in bytes) for the given width. Because |
| 94 // we use 32-bits per pixel, this will be roughly 4*width. However, for | 94 // we use 32-bits per pixel, this will be roughly 4*width. However, for |
| 95 // alignment reasons we may wish to increase that. | 95 // alignment reasons we may wish to increase that. |
| 96 SK_API size_t PlatformCanvasStrideForWidth(unsigned width); | 96 SK_API size_t PlatformCanvasStrideForWidth(unsigned width); |
| 97 | 97 |
| 98 // Returns the SkDevice pointer of the topmost rect with a non-empty | 98 // Returns the SkBaseDevice pointer of the topmost rect with a non-empty |
| 99 // clip. In practice, this is usually either the top layer or nothing, since | 99 // clip. In practice, this is usually either the top layer or nothing, since |
| 100 // we usually set the clip to new layers when we make them. | 100 // we usually set the clip to new layers when we make them. |
| 101 // | 101 // |
| 102 // This may return NULL, so callers need to check. | 102 // This may return NULL, so callers need to check. |
| 103 // | 103 // |
| 104 // This is different than SkCanvas' getDevice, because that returns the | 104 // This is different than SkCanvas' getDevice, because that returns the |
| 105 // bottommost device. | 105 // bottommost device. |
| 106 // | 106 // |
| 107 // Danger: the resulting device should not be saved. It will be invalidated | 107 // Danger: the resulting device should not be saved. It will be invalidated |
| 108 // by the next call to save() or restore(). | 108 // by the next call to save() or restore(). |
| 109 SK_API SkDevice* GetTopDevice(const SkCanvas& canvas); | 109 SK_API SkBaseDevice* GetTopDevice(const SkCanvas& canvas); |
| 110 | 110 |
| 111 // Returns true if native platform routines can be used to draw on the | 111 // Returns true if native platform routines can be used to draw on the |
| 112 // given canvas. If this function returns false, BeginPlatformPaint will | 112 // given canvas. If this function returns false, BeginPlatformPaint will |
| 113 // return NULL PlatformSurface. | 113 // return NULL PlatformSurface. |
| 114 SK_API bool SupportsPlatformPaint(const SkCanvas* canvas); | 114 SK_API bool SupportsPlatformPaint(const SkCanvas* canvas); |
| 115 | 115 |
| 116 // Draws into the a native platform surface, |context|. Forwards to | 116 // Draws into the a native platform surface, |context|. Forwards to |
| 117 // DrawToNativeContext on a PlatformDevice instance bound to the top device. | 117 // DrawToNativeContext on a PlatformDevice instance bound to the top device. |
| 118 // If no PlatformDevice instance is bound, is a no-operation. | 118 // If no PlatformDevice instance is bound, is a no-operation. |
| 119 SK_API void DrawToNativeContext(SkCanvas* canvas, | 119 SK_API void DrawToNativeContext(SkCanvas* canvas, |
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| 179 SkBitmap bitmap_; | 179 SkBitmap bitmap_; |
| 180 PlatformSurface surface_; // initialized to 0 | 180 PlatformSurface surface_; // initialized to 0 |
| 181 intptr_t platform_extra_; // platform specific, initialized to 0 | 181 intptr_t platform_extra_; // platform specific, initialized to 0 |
| 182 | 182 |
| 183 DISALLOW_COPY_AND_ASSIGN(PlatformBitmap); | 183 DISALLOW_COPY_AND_ASSIGN(PlatformBitmap); |
| 184 }; | 184 }; |
| 185 | 185 |
| 186 } // namespace skia | 186 } // namespace skia |
| 187 | 187 |
| 188 #endif // SKIA_EXT_PLATFORM_CANVAS_H_ | 188 #endif // SKIA_EXT_PLATFORM_CANVAS_H_ |
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