57 lines
1.6 KiB
C++
57 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 gfx_SharedDIBWin_h__
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#define gfx_SharedDIBWin_h__
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#include <windows.h>
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#include "SharedDIB.h"
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namespace mozilla {
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namespace gfx {
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class SharedDIBWin : public SharedDIB
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{
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public:
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SharedDIBWin();
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~SharedDIBWin();
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// Allocate a new win32 dib section compatible with an hdc. The dib will
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// be selected into the hdc on return.
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nsresult Create(HDC aHdc, uint32_t aWidth, uint32_t aHeight,
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bool aTransparent);
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// Wrap a dib section around an existing shared memory object. aHandle should
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// point to a section large enough for the dib's memory, otherwise this call
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// will fail.
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nsresult Attach(Handle aHandle, uint32_t aWidth, uint32_t aHeight,
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bool aTransparent);
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// Destroy or release resources associated with this dib.
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nsresult Close();
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// Return the HDC of the shared dib.
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HDC GetHDC() { return mSharedHdc; }
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// Return the bitmap bits.
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void* GetBits() { return mBitmapBits; }
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private:
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HDC mSharedHdc;
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HBITMAP mSharedBmp;
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HGDIOBJ mOldObj;
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void* mBitmapBits;
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uint32_t SetupBitmapHeader(uint32_t aWidth, uint32_t aHeight,
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bool aTransparent, BITMAPV4HEADER *aHeader);
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nsresult SetupSurface(HDC aHdc, BITMAPV4HEADER *aHdr);
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};
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} // gfx
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} // mozilla
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#endif
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