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Name
MESA_resize_buffers
Name Strings
GL_MESA_resize_buffers
Contact
Brian Paul, brianp 'at' mesa3d.org
Status
Shipping (since Mesa version 2.2)
Version
$Id: MESA_resize_buffers.spec,v 1.2 2000/04/04 23:29:32 brianp Exp $
Number
196
Dependencies
Mesa 2.2 or later is required.
Overview
Mesa is often used as a client library with no integration with
the computer's window system (an X server, for example). And since
Mesa does not have an event loop nor window system callbacks, it
cannot properly respond to window system events. In particular,
Mesa cannot automatically detect when a window has been resized.
Mesa's glViewport command queries the current window size and updates
its internal data structors accordingly. This normally works fine
since most applications call glViewport in responce to window size
changes.
In some situations, however, the application may not call glViewport
when a window size changes but would still like Mesa to adjust to
the new window size. This extension exports a new function to solve
this problem.
New Procedures and Functions
void glResizeBuffersMESA( void )
New Tokens
none
Additions to the OpenGL Specification (no particular section)
The glResizeBuffersMESA command may be called when the client
determines that a window has been resized. Calling
glResizeBuffersMESA causes Mesa to query the current window size
and adjust its internal data structures. This may include
reallocating depth, stencil, alpha and accumulation buffers.
Additions to the AGL/GLX/WGL Specifications
None
Errors
INVALID_OPERATION is generated if ResizeBuffersMESA is called betweeen
Begin and End.
New State
None.
New Implementation Dependent State
None.
Revision History
* Revision 1.0 - Initial specification
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