51 lines
1.3 KiB
C++
51 lines
1.3 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_SharedDIB_h__
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#define gfx_SharedDIB_h__
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#include "base/shared_memory.h"
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#include "nscore.h"
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namespace mozilla {
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namespace gfx {
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class SharedDIB
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{
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public:
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typedef base::SharedMemoryHandle Handle;
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static const uint32_t kBytesPerPixel = 4;
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public:
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SharedDIB();
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~SharedDIB();
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// Create and allocate a new shared dib.
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nsresult Create(uint32_t aSize);
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// Destroy or release resources associated with this dib.
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nsresult Close();
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// Returns true if this object contains a valid dib.
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bool IsValid();
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// Wrap a new shared dib around allocated shared memory. Note aHandle must point
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// to a memory section large enough to hold a dib of size aSize, otherwise this
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// will fail.
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nsresult Attach(Handle aHandle, uint32_t aSize);
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// Returns a SharedMemoryHandle suitable for sharing with another process.
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nsresult ShareToProcess(base::ProcessId aTargetPid, Handle *aNewHandle);
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protected:
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base::SharedMemory *mShMem;
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};
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} // namespace gfx
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} // namespace mozilla
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#endif
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