Windowless plugins: basic drawing works.

skia/ext/platform_device_linux.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_LINUX_H_
 #define SKIA_EXT_PLATFORM_DEVICE_LINUX_H_
 
 #include "SkDevice.h"
 
 namespace skia {
 
 // Blindly copying the mac hierarchy.
 class PlatformDeviceLinux : public SkDevice {
  public:
   // Returns if the preferred rendering engine is vectorial or bitmap based.
   virtual bool IsVectorial() = 0;
 
+  // An X drawable.  Avoid pulling in all of Xlib by typedef'ing.
+  typedef unsigned long XDrawable;
+
+  // Gets an X drawable that maps onto the drawing surface.
+  // This has the potential of being exceedingly slow; drawables are server-side
+  // but skia drawables are client-side, so we must copy all the data back and
+  // forth.  Only used for plugin drawing.
+  virtual XDrawable GetXDrawable() = 0;
+
  protected:
   // Forwards |bitmap| to SkDevice's constructor.
   PlatformDeviceLinux(const SkBitmap& bitmap);
 };
 
 }  // namespace skia
 
 #endif  // SKIA_EXT_PLATFORM_DEVICE_LINUX_H_