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| 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 | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef SKIA_EXT_PLATFORM_DEVICE_H_ | |
| 6 #define SKIA_EXT_PLATFORM_DEVICE_H_ | |
| 7 | |
| 8 #include "build/build_config.h" | |
| 9 | |
| 10 #include "skia/ext/native_drawing_context.h" | |
| 11 #include "third_party/skia/include/core/SkBitmapDevice.h" | |
| 12 #include "third_party/skia/include/core/SkTypes.h" | |
| 13 | |
| 14 class SkMatrix; | |
| 15 | |
| 16 namespace skia { | |
| 17 | |
| 18 class PlatformDevice; | |
| 19 | |
| 20 // The following routines provide accessor points for the functionality | |
| 21 // exported by the various PlatformDevice ports. | |
| 22 // All calls to PlatformDevice::* should be routed through these | |
| 23 // helper functions. | |
| 24 | |
| 25 // DEPRECATED | |
| 26 // Bind a PlatformDevice instance, |platform_device|, to |device|. | |
| 27 SK_API void SetPlatformDevice(SkBaseDevice* device, PlatformDevice* platform_dev
ice); | |
| 28 | |
| 29 // DEPRECATED | |
| 30 // Retrieve the previous argument to SetPlatformDevice(). | |
| 31 SK_API PlatformDevice* GetPlatformDevice(SkBaseDevice* device); | |
| 32 | |
| 33 // A SkBitmapDevice is basically a wrapper around SkBitmap that provides a | |
| 34 // surface for SkCanvas to draw into. PlatformDevice provides a surface | |
| 35 // Windows can also write to. It also provides functionality to play well | |
| 36 // with GDI drawing functions. This class is abstract and must be subclassed. | |
| 37 // It provides the basic interface to implement it either with or without | |
| 38 // a bitmap backend. | |
| 39 // | |
| 40 // PlatformDevice provides an interface which sub-classes of SkBaseDevice can | |
| 41 // also provide to allow for drawing by the native platform into the device. | |
| 42 // TODO(robertphillips): Once the bitmap-specific entry points are removed | |
| 43 // from SkBaseDevice it might make sense for PlatformDevice to be derived | |
| 44 // from it. | |
| 45 class SK_API PlatformDevice { | |
| 46 public: | |
| 47 virtual ~PlatformDevice(); | |
| 48 | |
| 49 // Only implemented in bitmap_platform_device_win. | |
| 50 #if defined(WIN32) | |
| 51 // The DC that corresponds to the bitmap, used for GDI operations drawing | |
| 52 // into the bitmap. This is possibly heavyweight, so it should be existant | |
| 53 // only during one pass of rendering. | |
| 54 virtual NativeDrawingContext BeginPlatformPaint(const SkMatrix& transform, | |
| 55 const SkIRect& clip_bounds) =
0; | |
| 56 #endif | |
| 57 }; | |
| 58 | |
| 59 } // namespace skia | |
| 60 | |
| 61 #endif // SKIA_EXT_PLATFORM_DEVICE_H_ | |
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Chromium Code Reviews
Issue 2629193002:
Remove skia::PlatformDevice (Closed)
