зеркало из https://github.com/mozilla/pjs.git
84 строки
2.8 KiB
C++
84 строки
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: sw=2 ts=8 et ft=cpp : */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at:
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Code.
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*
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* The Initial Developer of the Original Code is
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* The Mozilla Foundation
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* Portions created by the Initial Developer are Copyright (C) 2011
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Chris Jones <jones.chris.g@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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class gfxASurface;
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class nsIntRegion;
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class nsIntSize;
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namespace mozilla {
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namespace Framebuffer {
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//
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// The general usage of Framebuffer is
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//
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// -- in initialization code --
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// Open();
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//
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// -- ready to paint next frame --
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// nsRefPtr<gfxASurface> backBuffer = BackBuffer();
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// // ...
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// Paint(backBuffer);
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// // ...
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// Present();
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//
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// Return true if the fbdev was successfully opened, along with the
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// dimensions of the screen. If this fails, the result of all further
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// calls is undefined. Open() is idempotent.
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bool Open(nsIntSize* aScreenSize);
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// After Close(), the result of all further calls is undefined.
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// Close() is idempotent, and Open() can be called again after
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// Close().
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void Close();
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bool GetSize(nsIntSize *aScreenSize);
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// Return the buffer to be drawn into, that will be the next frame.
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gfxASurface* BackBuffer();
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// Swap the front buffer for the back buffer. |aUpdated| is the
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// region of the back buffer that was repainted.
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void Present(const nsIntRegion& aUpdated);
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} // namespace Framebuffer
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} // namespace mozilla
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