Move the platform files form port to skia for Mac only. Hopefully this won't ...

webkit/port/platform/graphics/skia/public/PlatformDeviceMac.h

-// Copyright (c) 2006-2008 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 PlatformDeviceMac_h
-#define PlatformDeviceMac_h
-
-#import <ApplicationServices/ApplicationServices.h>
-#include "SkDevice.h"
-
-class SkMatrix;
-class SkPath;
-class SkRegion;
-
-namespace gfx {
-
-// 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. It also provides functionality to play well with CG drawing
-// functions.
-// This class is abstract and must be subclassed. It provides the basic
-// interface to implement it either with or without a bitmap backend.
-class PlatformDeviceMac : public SkDevice {
- public:
-  // The CGContext that corresponds to the bitmap, used for CoreGraphics
-  // operations drawing into the bitmap. This is possibly heavyweight, so it
-  // should exist only during one pass of rendering.
-  virtual CGContextRef GetBitmapContext() = 0;
-
-  // Draws to the given graphics context. If the bitmap context doesn't exist,
-  // this will temporarily create it. However, if you have created the bitmap
-  // context, it will be more efficient if you don't free it until after this
-  // call so it doesn't have to be created twice.  If src_rect is null, then
-  // the entirety of the source device will be copied.
-  virtual void DrawToContext(CGContextRef context, int x, int y,
-                             const CGRect* src_rect) = 0;
-
-  // Sets the opacity of each pixel in the specified region to be opaque.
-  void makeOpaque(int x, int y, int width, int height);
-
-  // Returns if the preferred rendering engine is vectorial or bitmap based.
-  virtual bool IsVectorial() = 0;
-
-  // On platforms where the native rendering API does not support rendering
-  // into bitmaps with a premultiplied alpha channel, this call is responsible
-  // for doing any fixup necessary.  It is not used on the Mac, since
-  // CoreGraphics can handle premultiplied alpha just fine.
-  virtual void fixupAlphaBeforeCompositing() = 0;
-
-  // Initializes the default settings and colors in a device context.
-  static void InitializeCGContext(CGContextRef context);
-
-  // Loads a SkPath into the CG context. The path can there after be used for
-  // clipping or as a stroke.
-  static void LoadPathToCGContext(CGContextRef context, const SkPath& path);
-
-  // Loads a SkRegion into the CG context.
-  static void LoadClippingRegionToCGContext(CGContextRef context,
-                                            const SkRegion& region,
-                                            const SkMatrix& transformation);
-
- protected:
-  // Forwards |bitmap| to SkDevice's constructor.
-  PlatformDeviceMac(const SkBitmap& bitmap);
-
-  // Loads the specified Skia transform into the device context
-  static void LoadTransformToCGContext(CGContextRef context,
-                                       const SkMatrix& matrix);
-
-  // Function pointer used by the processPixels method for setting the alpha
-  // value of a particular pixel.
-  typedef void (*adjustAlpha)(uint32_t* pixel);
-
-  // Loops through each of the pixels in the specified range, invoking
-  // adjustor for the alpha value of each pixel.
-  virtual void processPixels(int x,
-                             int y,
-                             int width,
-                             int height,
-                             adjustAlpha adjustor) = 0;
-};
-
-}  // namespace gfx
-
-#endif  // PlatformDeviceMac_h
-