Windowless plugins: basic drawing works.

skia/ext/bitmap_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_BITMAP_PLATFORM_DEVICE_LINUX_H_
 #define SKIA_EXT_BITMAP_PLATFORM_DEVICE_LINUX_H_
 
 #include "base/ref_counted.h"
 #include "skia/ext/platform_device_linux.h"
 
@@ skipping 29 matching lines @@
 // something that we can't easily change.
 // -----------------------------------------------------------------------------
 
 namespace skia {
 
 // -----------------------------------------------------------------------------
 // This is the Linux bitmap backing for Skia. We create a Cairo image surface
 // to store the backing buffer. This buffer is BGRA in memory (on little-endian
 // machines).
 //
-// For now we are also using Cairo to paint to the Drawables so we provide an
-// accessor for getting the surface.
+// The caller may optionally provide a handle to a real X Drawable surface;
+// this is only necessary for plugins.
 //
-// This is all quite ok for test_shell. In the future we will want to use
-// shared memory between the renderer and the main process at least. In this
-// case we'll probably create the buffer from a precreated region of memory.
+// For now we are also using Cairo to paint to the Drawables so we
+// provide an accessor for getting the surface.
+// TODO(agl): document how the new BackingStore-based drawing code
+// path in the browser works in relation to this.
 // -----------------------------------------------------------------------------
 class BitmapPlatformDeviceLinux : public PlatformDeviceLinux {
   // A reference counted cairo surface
   class BitmapPlatformDeviceLinuxData;
 
  public:
   static BitmapPlatformDeviceLinux* Create(int width, int height,
                                            bool is_opaque);
   // This doesn't take ownership of |data|
   static BitmapPlatformDeviceLinux* Create(int width, int height,
                                            bool is_opaque, uint8_t* data);
   static BitmapPlatformDeviceLinux* Create(int width, int height,
                                            bool is_opaque,
                                            cairo_surface_t* surface);
 
   // Create a BitmapPlatformDeviceLinux from an already constructed bitmap;
   // you should probably be using Create(). This may become private later if
   // we ever have to share state between some native drawing UI and Skia, like
   // the Windows and Mac versions of this class do.
   //
   // This object takes ownership of @data.
   BitmapPlatformDeviceLinux(const SkBitmap& other,
                             BitmapPlatformDeviceLinuxData* data);
   virtual ~BitmapPlatformDeviceLinux();
   BitmapPlatformDeviceLinux& operator=(const BitmapPlatformDeviceLinux& other);
 
+  // Bitmaps aren't vector graphics.
+  virtual bool IsVectorial() { return false; }
+
+  // See comment in platform_device_linux.h.
+  virtual XDrawable GetXDrawable();
+
+  cairo_surface_t* surface() const;
+
   // A stub copy constructor.  Needs to be properly implemented.
   BitmapPlatformDeviceLinux(const BitmapPlatformDeviceLinux& other);
 
-  // Bitmaps aren't vector graphics.
-  virtual bool IsVectorial() { return false; }
-
-  cairo_surface_t* surface() const;
+ protected:
+  // Flushes the pixmap (if any) so that the pixel data can be accessed
+  // directly by Skia. Overridden from SkDevice, this is called when Skia
+  // starts accessing pixel data.
+  virtual void onAccessBitmap(SkBitmap* bitmap);
 
  private:
   scoped_refptr<BitmapPlatformDeviceLinuxData> data_;
 };
 
 }  // namespace skia
 
 #endif  // SKIA_EXT_BITMAP_PLATFORM_DEVICE_LINUX_H_