mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-01 06:35:42 +00:00
76 lines
2.8 KiB
C++
76 lines
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
|
|
* 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 IN_GL_CONTEXT_PROVIDER_H
|
|
#error GLContextProviderImpl.h must only be included from GLContextProvider.h
|
|
#endif
|
|
|
|
#ifndef GL_CONTEXT_PROVIDER_NAME
|
|
#error GL_CONTEXT_PROVIDER_NAME not defined
|
|
#endif
|
|
|
|
class GL_CONTEXT_PROVIDER_NAME
|
|
{
|
|
public:
|
|
typedef gfx::SurfaceCaps SurfaceCaps;
|
|
/**
|
|
* Create a context that renders to the surface of the widget that is
|
|
* passed in. The context is always created with an RGB pixel format,
|
|
* with no alpha, depth or stencil. If any of those features are needed,
|
|
* either use a framebuffer, or use CreateOffscreen.
|
|
*
|
|
* This context will attempt to share resources with all other window
|
|
* contexts. As such, it's critical that resources allocated that are not
|
|
* needed by other contexts be deleted before the context is destroyed.
|
|
*
|
|
* The GetSharedContext() method will return non-null if sharing
|
|
* was successful.
|
|
*
|
|
* Note: a context created for a widget /must not/ hold a strong
|
|
* reference to the widget; otherwise a cycle can be created through
|
|
* a GL layer manager.
|
|
*
|
|
* @param aWidget Widget whose surface to create a context for
|
|
*
|
|
* @return Context to use for the window
|
|
*/
|
|
static already_AddRefed<GLContext>
|
|
CreateForWindow(nsIWidget* widget);
|
|
|
|
/**
|
|
* Create a context for offscreen rendering. The target of this
|
|
* context should be treated as opaque -- it might be a FBO, or a
|
|
* pbuffer, or some other construct. Users of this GLContext
|
|
* should bind framebuffer 0 directly to use this offscreen buffer.
|
|
*
|
|
* The offscreen context returned by this method will always have
|
|
* the ability to be rendered into a context created by a window.
|
|
* It might or might not share resources with the global context;
|
|
* query GetSharedContext() for a non-null result to check. If
|
|
* resource sharing can be avoided on the target platform, it will
|
|
* be, in order to isolate the offscreen context.
|
|
*
|
|
* @param aSize The initial size of this offscreen context.
|
|
* @param aFormat The ContextFormat for this offscreen context.
|
|
*
|
|
* @return Context to use for offscreen rendering
|
|
*/
|
|
static already_AddRefed<GLContext>
|
|
CreateOffscreen(const gfxIntSize& size,
|
|
const SurfaceCaps& caps);
|
|
|
|
/**
|
|
* Get a pointer to the global context, creating it if it doesn't exist.
|
|
*/
|
|
static GLContext*
|
|
GetGlobalContext();
|
|
|
|
/**
|
|
* Free any resources held by this Context Provider.
|
|
*/
|
|
static void
|
|
Shutdown();
|
|
};
|