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 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

 /* This Source Code Form is subject to the terms of the Mozilla Public

  * License, v. 2.0. If a copy of the MPL was not distributed with this

  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

 #ifndef gfx_SharedDIBWin_h__

 #define gfx_SharedDIBWin_h__

 #include <windows.h>

 #include "SharedDIB.h"

 namespace mozilla {

 namespace gfx {

 class SharedDIBWin : public SharedDIB

 {

 public:

   SharedDIBWin();

   ~SharedDIBWin();

   // Allocate a new win32 dib section compatible with an hdc. The dib will

   // be selected into the hdc on return.

   nsresult Create(HDC aHdc, uint32_t aWidth, uint32_t aHeight,

                   bool aTransparent);

   // Wrap a dib section around an existing shared memory object. aHandle should

   // point to a section large enough for the dib's memory, otherwise this call

   // will fail.

   nsresult Attach(Handle aHandle, uint32_t aWidth, uint32_t aHeight,

                   bool aTransparent);

   // Destroy or release resources associated with this dib.

   nsresult Close();

   // Return the HDC of the shared dib.

   HDC GetHDC() { return mSharedHdc; }

   // Return the bitmap bits.

   void* GetBits() { return mBitmapBits; }

 private:

   HDC                 mSharedHdc;

   HBITMAP             mSharedBmp;

   HGDIOBJ             mOldObj;

   void*               mBitmapBits;

   uint32_t SetupBitmapHeader(uint32_t aWidth, uint32_t aHeight,

                              bool aTransparent, BITMAPV4HEADER *aHeader);

   nsresult SetupSurface(HDC aHdc, BITMAPV4HEADER *aHdr);

 };

 } // gfx

 } // mozilla

 #endif