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skia/ext/platform_device_win.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 SKIA_EXT_PLATFORM_DEVICE_WIN_H_
 #define SKIA_EXT_PLATFORM_DEVICE_WIN_H_
 
 #include <windows.h>
 
 #include <vector>
@@ skipping 18 matching lines @@
   // only during one pass of rendering.
   virtual HDC getBitmapDC() = 0;
 
   // Draws to the given screen DC, if the bitmap DC doesn't exist, this will
   // temporarily create it. However, if you have created the bitmap DC, 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 drawToHDC(HDC dc, int x, int y, const RECT* src_rect) = 0;
 
-  // Invoke before using GDI functions. See description in platform_device.cc
-  // for specifics.
-  // NOTE: x,y,width and height are relative to the current transform.
-  virtual void prepareForGDI(int x, int y, int width, int height) { }
-
-  // Invoke after using GDI functions. See description in platform_device.cc
-  // for specifics.
-  // NOTE: x,y,width and height are relative to the current transform.
-  virtual void postProcessGDI(int x, int y, int width, int height) { }
-
   // Sets the opacity of each pixel in the specified region to be opaque.
   virtual void makeOpaque(int x, int y, int width, int height) { }
 
-  // Call this function to fix the alpha channels before compositing this layer
-  // onto another. Internally, the device uses a special alpha method to work
-  // around problems with Windows. This call will put the values into what
-  // Skia expects, so it can be composited onto other layers.
-  //
-  // After this call, no more drawing can be done because the
-  // alpha channels will be "correct", which, if this function is called again
-  // will make them wrong. See the implementation for more discussion.
-  virtual void fixupAlphaBeforeCompositing() { }
-
   // Returns if the preferred rendering engine is vectorial or bitmap based.
   virtual bool IsVectorial() = 0;
 
   // Initializes the default settings and colors in a device context.
   static void InitializeDC(HDC context);
 
   // Loads a SkPath into the GDI context. The path can there after be used for
   // clipping or as a stroke.
   static void LoadPathToDC(HDC context, const SkPath& path);
 
@@ skipping 17 matching lines @@
   static void LoadTransformToDC(HDC dc, const SkMatrix& matrix);
 
   // Transforms SkPath's paths into a series of cubic path.
   static bool SkPathToCubicPaths(CubicPaths* paths, const SkPath& skpath);
 };
 
 }  // namespace skia
 
 #endif  // SKIA_EXT_PLATFORM_DEVICE_WIN_H_