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