Index: skia/ext/bitmap_platform_device_mac.h |
diff --git a/skia/ext/bitmap_platform_device_mac.h b/skia/ext/bitmap_platform_device_mac.h |
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index 0000000000000000000000000000000000000000..10dce7fefac81d4e38c6c2c765d146d6d14d1e0e |
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+++ b/skia/ext/bitmap_platform_device_mac.h |
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+// Copyright (c) 2012 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#ifndef SKIA_EXT_BITMAP_PLATFORM_DEVICE_MAC_H_ |
+#define SKIA_EXT_BITMAP_PLATFORM_DEVICE_MAC_H_ |
+ |
+#include <stdint.h> |
+ |
+#include "base/compiler_specific.h" |
+#include "base/macros.h" |
+#include "skia/ext/platform_device.h" |
+ |
+namespace skia { |
+ |
+// A device is basically a wrapper around SkBitmap that provides a surface for |
+// SkCanvas to draw into. Our device provides a surface CoreGraphics can also |
+// write to. BitmapPlatformDevice creates a bitmap using |
+// CGCreateBitmapContext() in a format that Skia supports and can then use this |
+// to draw text into, etc. This pixel data is provided to the bitmap that the |
+// device contains so that it can be shared. |
+// |
+// The device owns the pixel data, when the device goes away, the pixel data |
+// also becomes invalid. THIS IS DIFFERENT THAN NORMAL SKIA which uses |
+// reference counting for the pixel data. In normal Skia, you could assign |
+// another bitmap to this device's bitmap and everything will work properly. |
+// For us, that other bitmap will become invalid as soon as the device becomes |
+// invalid, which may lead to subtle bugs. Therefore, DO NOT ASSIGN THE |
+// DEVICE'S PIXEL DATA TO ANOTHER BITMAP, make sure you copy instead. |
+class SK_API BitmapPlatformDevice : public SkBitmapDevice, public PlatformDevice { |
+ public: |
+ // Creates a BitmapPlatformDevice instance. |is_opaque| should be set if the |
+ // caller knows the bitmap will be completely opaque and allows some |
+ // optimizations. |
+ // |context| may be NULL. If |context| is NULL, then the bitmap backing store |
+ // is not initialized. |
+ static BitmapPlatformDevice* Create(CGContextRef context, |
+ int width, int height, |
+ bool is_opaque, bool do_clear = false); |
+ |
+ // Creates a context for |data| and calls Create. |
+ // If |data| is NULL, then the bitmap backing store is not initialized. |
+ static BitmapPlatformDevice* CreateWithData(uint8_t* data, |
+ int width, int height, |
+ bool is_opaque); |
+ |
+ ~BitmapPlatformDevice() override; |
+ |
+ protected: |
+ BitmapPlatformDevice(CGContextRef context, |
+ const SkBitmap& bitmap); |
+ |
+ SkBaseDevice* onCreateDevice(const CreateInfo&, const SkPaint*) override; |
+ |
+ private: |
+ NativeDrawingContext BeginPlatformPaint(const SkMatrix& transform, |
+ const SkIRect& clip_bounds) override; |
+ |
+ void ReleaseBitmapContext(); |
+ |
+ // Loads the current transform and clip into the context. Can be called even |
+ // when |bitmap_context_| is NULL (will be a NOP). |
+ void LoadConfig(const SkMatrix& transform, const SkIRect& clip_bounds); |
+ |
+ // Lazily-created graphics context used to draw into the bitmap. |
+ CGContextRef bitmap_context_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(BitmapPlatformDevice); |
+}; |
+ |
+} // namespace skia |
+ |
+#endif // SKIA_EXT_BITMAP_PLATFORM_DEVICE_MAC_H_ |