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 mozilla_gfx_SharedDIBSurface_h
michael@0: #define mozilla_gfx_SharedDIBSurface_h
michael@0: 
michael@0: #include "gfxImageSurface.h"
michael@0: #include "SharedDIBWin.h"
michael@0: 
michael@0: #include <windows.h>
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace gfx {
michael@0: 
michael@0: /**
michael@0:  * A SharedDIBSurface owns an underlying SharedDIBWin.
michael@0:  */
michael@0: class SharedDIBSurface : public gfxImageSurface
michael@0: {
michael@0: public:
michael@0:   typedef base::SharedMemoryHandle Handle;
michael@0: 
michael@0:   SharedDIBSurface() { }
michael@0:   ~SharedDIBSurface() { }
michael@0: 
michael@0:   /**
michael@0:    * Create this image surface backed by shared memory.
michael@0:    */
michael@0:   bool Create(HDC adc, uint32_t aWidth, uint32_t aHeight, bool aTransparent);
michael@0: 
michael@0:   /**
michael@0:    * Attach this surface to shared memory from another process.
michael@0:    */
michael@0:   bool Attach(Handle aHandle, uint32_t aWidth, uint32_t aHeight,
michael@0:               bool aTransparent);
michael@0: 
michael@0:   /**
michael@0:    * After drawing to a surface via GDI, GDI must be flushed before the bitmap
michael@0:    * is valid.
michael@0:    */
michael@0:   void Flush() { ::GdiFlush(); }
michael@0: 
michael@0:   HDC GetHDC() { return mSharedDIB.GetHDC(); }
michael@0: 
michael@0:   nsresult ShareToProcess(base::ProcessHandle aChildProcess, Handle* aChildHandle) {
michael@0:     return mSharedDIB.ShareToProcess(aChildProcess, aChildHandle);
michael@0:   }
michael@0: 
michael@0:   static bool IsSharedDIBSurface(gfxASurface* aSurface);
michael@0: 
michael@0: private:
michael@0:   SharedDIBWin mSharedDIB;
michael@0: 
michael@0:   void InitSurface(uint32_t aWidth, uint32_t aHeight, bool aTransparent);
michael@0: };
michael@0: 
michael@0: } // namespace gfx
michael@0: } // namespace mozilla
michael@0: 
michael@0: #endif // mozilla_gfx_SharedDIBSurface_h