63 lines
1.6 KiB
C++
63 lines
1.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_gfx_SharedDIBSurface_h
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#define mozilla_gfx_SharedDIBSurface_h
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#include "gfxImageSurface.h"
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#include "SharedDIBWin.h"
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#include <windows.h>
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namespace mozilla {
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namespace gfx {
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/**
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* A SharedDIBSurface owns an underlying SharedDIBWin.
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*/
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class SharedDIBSurface : public gfxImageSurface
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{
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public:
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typedef base::SharedMemoryHandle Handle;
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SharedDIBSurface() { }
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~SharedDIBSurface() { }
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/**
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* Create this image surface backed by shared memory.
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*/
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bool Create(HDC adc, uint32_t aWidth, uint32_t aHeight, bool aTransparent);
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/**
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* Attach this surface to shared memory from another process.
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*/
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bool Attach(Handle aHandle, uint32_t aWidth, uint32_t aHeight,
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bool aTransparent);
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/**
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* After drawing to a surface via GDI, GDI must be flushed before the bitmap
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* is valid.
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*/
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void Flush() { ::GdiFlush(); }
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HDC GetHDC() { return mSharedDIB.GetHDC(); }
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nsresult ShareToProcess(base::ProcessId aTargetPid, Handle* aNewHandle) {
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return mSharedDIB.ShareToProcess(aTargetPid, aNewHandle);
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}
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static bool IsSharedDIBSurface(gfxASurface* aSurface);
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private:
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SharedDIBWin mSharedDIB;
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void InitSurface(uint32_t aWidth, uint32_t aHeight, bool aTransparent);
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};
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} // namespace gfx
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} // namespace mozilla
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#endif // mozilla_gfx_SharedDIBSurface_h
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