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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /gfx/ipc/SharedDIB.h
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'gfx/ipc/SharedDIB.h')
-rw-r--r--gfx/ipc/SharedDIB.h50
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diff --git a/gfx/ipc/SharedDIB.h b/gfx/ipc/SharedDIB.h
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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 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