michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef gfx_SharedDIBWin_h__
michael@0: #define gfx_SharedDIBWin_h__
michael@0: 
michael@0: #include <windows.h>
michael@0: 
michael@0: #include "SharedDIB.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace gfx {
michael@0: 
michael@0: class SharedDIBWin : public SharedDIB
michael@0: {
michael@0: public:
michael@0:   SharedDIBWin();
michael@0:   ~SharedDIBWin();
michael@0: 
michael@0:   // Allocate a new win32 dib section compatible with an hdc. The dib will
michael@0:   // be selected into the hdc on return.
michael@0:   nsresult Create(HDC aHdc, uint32_t aWidth, uint32_t aHeight,
michael@0:                   bool aTransparent);
michael@0: 
michael@0:   // Wrap a dib section around an existing shared memory object. aHandle should
michael@0:   // point to a section large enough for the dib's memory, otherwise this call
michael@0:   // will fail.
michael@0:   nsresult Attach(Handle aHandle, uint32_t aWidth, uint32_t aHeight,
michael@0:                   bool aTransparent);
michael@0: 
michael@0:   // Destroy or release resources associated with this dib.
michael@0:   nsresult Close();
michael@0: 
michael@0:   // Return the HDC of the shared dib.
michael@0:   HDC GetHDC() { return mSharedHdc; }
michael@0: 
michael@0:   // Return the bitmap bits.
michael@0:   void* GetBits() { return mBitmapBits; }
michael@0: 
michael@0: private:
michael@0:   HDC                 mSharedHdc;
michael@0:   HBITMAP             mSharedBmp;
michael@0:   HGDIOBJ             mOldObj;
michael@0:   void*               mBitmapBits;
michael@0: 
michael@0:   uint32_t SetupBitmapHeader(uint32_t aWidth, uint32_t aHeight,
michael@0:                              bool aTransparent, BITMAPV4HEADER *aHeader);
michael@0:   nsresult SetupSurface(HDC aHdc, BITMAPV4HEADER *aHdr);
michael@0: };
michael@0: 
michael@0: } // gfx
michael@0: } // mozilla
michael@0: 
michael@0: #endif