| OLD | NEW |
| 1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2006-2008 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_MAC_H_ | 5 #ifndef SKIA_EXT_BITMAP_PLATFORM_DEVICE_MAC_H_ |
| 6 #define SKIA_EXT_BITMAP_PLATFORM_DEVICE_MAC_H_ | 6 #define SKIA_EXT_BITMAP_PLATFORM_DEVICE_MAC_H_ |
| 7 | 7 |
| 8 #include "skia/ext/platform_device_mac.h" | 8 #include "skia/ext/platform_device_mac.h" |
| 9 | 9 |
| 10 namespace skia { | 10 namespace skia { |
| 11 | 11 |
| 12 // A device is basically a wrapper around SkBitmap that provides a surface for | 12 // A device is basically a wrapper around SkBitmap that provides a surface for |
| 13 // SkCanvas to draw into. Our device provides a surface CoreGraphics can also | 13 // SkCanvas to draw into. Our device provides a surface CoreGraphics can also |
| 14 // write to. BitmapPlatformDevice creates a bitmap using | 14 // write to. BitmapPlatformDevice creates a bitmap using |
| 15 // CGCreateBitmapContext() in a format that Skia supports and can then use this | 15 // CGCreateBitmapContext() in a format that Skia supports and can then use this |
| 16 // to draw text into, etc. This pixel data is provided to the bitmap that the | 16 // to draw text into, etc. This pixel data is provided to the bitmap that the |
| 17 // device contains so that it can be shared. | 17 // device contains so that it can be shared. |
| 18 // | 18 // |
| 19 // The device owns the pixel data, when the device goes away, the pixel data | 19 // The device owns the pixel data, when the device goes away, the pixel data |
| 20 // also becomes invalid. THIS IS DIFFERENT THAN NORMAL SKIA which uses | 20 // also becomes invalid. THIS IS DIFFERENT THAN NORMAL SKIA which uses |
| 21 // reference counting for the pixel data. In normal Skia, you could assign | 21 // reference counting for the pixel data. In normal Skia, you could assign |
| 22 // another bitmap to this device's bitmap and everything will work properly. | 22 // another bitmap to this device's bitmap and everything will work properly. |
| 23 // For us, that other bitmap will become invalid as soon as the device becomes | 23 // For us, that other bitmap will become invalid as soon as the device becomes |
| 24 // invalid, which may lead to subtle bugs. Therefore, DO NOT ASSIGN THE | 24 // invalid, which may lead to subtle bugs. Therefore, DO NOT ASSIGN THE |
| 25 // DEVICE'S PIXEL DATA TO ANOTHER BITMAP, make sure you copy instead. | 25 // DEVICE'S PIXEL DATA TO ANOTHER BITMAP, make sure you copy instead. |
| 26 class BitmapPlatformDevice : public PlatformDevice { | 26 class BitmapPlatformDevice : public PlatformDevice { |
| 27 public: | 27 public: |
| 28 // |context| may be NULL. | 28 // |context| may be NULL. |
| 29 static BitmapPlatformDevice* CreateWithContext(CGContextRef context, | 29 static BitmapPlatformDevice* Create(CGContextRef context, |
| 30 int width, int height, | 30 int width, int height, |
| 31 bool is_opaque); | 31 bool is_opaque); |
| 32 | 32 |
| 33 // Creates a context for |data| and calls CreateWithContext. | 33 // Creates a context for |data| and calls Create. |
| 34 static BitmapPlatformDevice* CreateWithData(uint8_t* data, | 34 static BitmapPlatformDevice* CreateWithData(uint8_t* data, |
| 35 int width, int height, | 35 int width, int height, |
| 36 bool is_opaque); | 36 bool is_opaque); |
| 37 | 37 |
| 38 // Copy constructor. When copied, devices duplicate their internal data, so | 38 // Copy constructor. When copied, devices duplicate their internal data, so |
| 39 // stay linked. This is because their implementation is very heavyweight | 39 // stay linked. This is because their implementation is very heavyweight |
| 40 // (lots of memory and CoreGraphics state). If a device has been copied, both | 40 // (lots of memory and CoreGraphics state). If a device has been copied, both |
| 41 // clip rects and other state will stay in sync. | 41 // clip rects and other state will stay in sync. |
| 42 // | 42 // |
| 43 // This means it will NOT work to duplicate a device and assign it to a | 43 // This means it will NOT work to duplicate a device and assign it to a |
| (...skipping 38 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
| 82 adjustAlpha adjustor); | 82 adjustAlpha adjustor); |
| 83 | 83 |
| 84 // Data associated with this device, guaranteed non-null. We hold a reference | 84 // Data associated with this device, guaranteed non-null. We hold a reference |
| 85 // to this object. | 85 // to this object. |
| 86 BitmapPlatformDeviceData* data_; | 86 BitmapPlatformDeviceData* data_; |
| 87 }; | 87 }; |
| 88 | 88 |
| 89 } // namespace skia | 89 } // namespace skia |
| 90 | 90 |
| 91 #endif // SKIA_EXT_BITMAP_PLATFORM_DEVICE_MAC_H_ | 91 #endif // SKIA_EXT_BITMAP_PLATFORM_DEVICE_MAC_H_ |
| OLD | NEW |