зеркало из https://github.com/mozilla/pjs.git
118 строки
4.7 KiB
C++
118 строки
4.7 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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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 Initial Developer of the Original Code is Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2010
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Bas Schouten <bschouten@mozilla.com>
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* Matt Woodrow <mwoodrow@mozilla.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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#ifndef IN_GL_CONTEXT_PROVIDER_H
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#error GLContextProviderImpl.h must only be included from GLContextProvider.h
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#endif
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#ifndef GL_CONTEXT_PROVIDER_NAME
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#error GL_CONTEXT_PROVIDER_NAME not defined
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#endif
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class THEBES_API GL_CONTEXT_PROVIDER_NAME
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{
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public:
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/**
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* Create a context that renders to the surface of the widget that is
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* passed in. The context is always created with an RGB pixel format,
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* with no alpha, depth or stencil. If any of those features are needed,
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* either use a framebuffer, or use CreateOffscreen.
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*
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* This context will attempt to share resources with all other window
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* contexts. As such, it's critical that resources allocated that are not
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* needed by other contexts be deleted before the context is destroyed.
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*
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* The GetSharedContext() method will return non-null if sharing
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* was successful.
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*
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* Note: a context created for a widget /must not/ hold a strong
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* reference to the widget; otherwise a cycle can be created through
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* a GL layer manager.
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*
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* @param aWidget Widget whose surface to create a context for
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*
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* @return Context to use for the window
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*/
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static already_AddRefed<GLContext>
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CreateForWindow(nsIWidget *aWidget);
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/**
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* Create a context for offscreen rendering. The target of this
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* context should be treated as opaque -- it might be a FBO, or a
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* pbuffer, or some other construct. Users of this GLContext
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* should not bind framebuffer 0 directly, and instead should bind
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* the framebuffer returned by GetOffscreenFBO().
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*
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* The offscreen context returned by this method will always have
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* the ability to be rendered into a context created by a window.
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* It might or might not share resources with the global context;
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* query GetSharedContext() for a non-null result to check. If
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* resource sharing can be avoided on the target platform, it will
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* be, in order to isolate the offscreen context.
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*
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* @param aSize The initial size of this offscreen context.
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* @param aFormat The ContextFormat for this offscreen context.
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*
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* @return Context to use for offscreen rendering
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*/
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static already_AddRefed<GLContext>
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CreateOffscreen(const gfxIntSize& aSize,
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const ContextFormat& aFormat = ContextFormat::BasicRGBA32Format);
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/**
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* Try to create a GL context from native surface for arbitrary gfxASurface
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* If surface not compatible this will return NULL
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*
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* @param aSurface surface to create a context for
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*
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* @return Context to use for this surface
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*/
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static already_AddRefed<GLContext>
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CreateForNativePixmapSurface(gfxASurface *aSurface);
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/**
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* Get a pointer to the global context, creating it if it doesn't exist.
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*/
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static GLContext *
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GetGlobalContext();
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/**
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* Free any resources held by this Context Provider.
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*/
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static void
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Shutdown();
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};
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