From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 2 Feb 2018 04:16:08 -0500 Subject: Add m-esr52 at 52.6.0 --- gfx/ipc/SharedDIB.h | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 gfx/ipc/SharedDIB.h (limited to 'gfx/ipc/SharedDIB.h') diff --git a/gfx/ipc/SharedDIB.h b/gfx/ipc/SharedDIB.h new file mode 100644 index 000000000..6c48b2875 --- /dev/null +++ b/gfx/ipc/SharedDIB.h @@ -0,0 +1,50 @@ +/* -*- 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 gfx_SharedDIB_h__ +#define gfx_SharedDIB_h__ + +#include "base/shared_memory.h" +#include "nscore.h" + +namespace mozilla { +namespace gfx { + +class SharedDIB +{ +public: + typedef base::SharedMemoryHandle Handle; + + static const uint32_t kBytesPerPixel = 4; + +public: + SharedDIB(); + ~SharedDIB(); + + // Create and allocate a new shared dib. + nsresult Create(uint32_t aSize); + + // Destroy or release resources associated with this dib. + nsresult Close(); + + // Returns true if this object contains a valid dib. + bool IsValid(); + + // Wrap a new shared dib around allocated shared memory. Note aHandle must point + // to a memory section large enough to hold a dib of size aSize, otherwise this + // will fail. + nsresult Attach(Handle aHandle, uint32_t aSize); + + // Returns a SharedMemoryHandle suitable for sharing with another process. + nsresult ShareToProcess(base::ProcessId aTargetPid, Handle *aNewHandle); + +protected: + base::SharedMemory *mShMem; +}; + +} // namespace gfx +} // namespace mozilla + +#endif -- cgit v1.2.3