1 // Copyright 2013 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_BITMAP_PLATFORM_DEVICE_SKIA_H_ 6 #define SKIA_EXT_BITMAP_PLATFORM_DEVICE_SKIA_H_ 7 8 #include "base/compiler_specific.h" 9 #include "base/memory/ref_counted.h" 10 #include "skia/ext/platform_device.h" 11 12 namespace skia { 13 14 // ----------------------------------------------------------------------------- 15 // For now we just use SkBitmap for SkBitmapDevice 16 // 17 // This is all quite ok for test_shell. In the future we will want to use 18 // shared memory between the renderer and the main process at least. In this 19 // case we'll probably create the buffer from a precreated region of memory. 20 // ----------------------------------------------------------------------------- 21 class BitmapPlatformDevice : public SkBitmapDevice, public PlatformDevice { 22 public: 23 // Construct a BitmapPlatformDevice. |is_opaque| should be set if the caller 24 // knows the bitmap will be completely opaque and allows some optimizations. 25 // The bitmap is not initialized. 26 static BitmapPlatformDevice* Create(int width, int height, bool is_opaque); 27 28 // Construct a BitmapPlatformDevice, as above. 29 // If |is_opaque| is false, the bitmap is initialized to 0. 30 static BitmapPlatformDevice* CreateAndClear(int width, int height, 31 bool is_opaque); 32 33 // This doesn't take ownership of |data|. If |data| is null, the bitmap 34 // is not initialized to 0. 35 static BitmapPlatformDevice* Create(int width, int height, bool is_opaque, 36 uint8_t* data); 37 38 // Create a BitmapPlatformDevice from an already constructed bitmap; 39 // you should probably be using Create(). This may become private later if 40 // we ever have to share state between some native drawing UI and Skia, like 41 // the Windows and Mac versions of this class do. 42 explicit BitmapPlatformDevice(const SkBitmap& other); 43 virtual ~BitmapPlatformDevice(); 44 45 virtual PlatformSurface BeginPlatformPaint() OVERRIDE; 46 virtual void DrawToNativeContext(PlatformSurface surface, int x, int y, 47 const PlatformRect* src_rect) OVERRIDE; 48 49 protected: 50 virtual SkBaseDevice* onCreateDevice(const SkImageInfo& info, 51 Usage usage) OVERRIDE; 52 53 private: 54 DISALLOW_COPY_AND_ASSIGN(BitmapPlatformDevice); 55 }; 56 57 } // namespace skia 58 59 #endif // SKIA_EXT_BITMAP_PLATFORM_DEVICE_SKIA_H_ 60
