docs/MESA_resize_buffers.spec

   1 Name
   2
   3     MESA_resize_buffers
   4
   5 Name Strings
   6
   7     GL_MESA_resize_buffers
   8
   9 Contact
  10
  11     Brian Paul (brian.paul 'at' tungstengraphics.com)
  12
  13 Status
  14
  15     Shipping (since Mesa version 2.2)
  16
  17 Version
  18
  19     $Id: MESA_resize_buffers.spec,v 1.3 2004/03/25 01:42:42 brianp Exp $
  20
  21 Number
  22
  23     196
  24
  25 Dependencies
  26
  27     Mesa 2.2 or later is required.
  28
  29 Overview
  30
  31     Mesa is often used as a client library with no integration with
  32     the computer's window system (an X server, for example).  And since
  33     Mesa does not have an event loop nor window system callbacks, it
  34     cannot properly respond to window system events.  In particular,
  35     Mesa cannot automatically detect when a window has been resized.
  36
  37     Mesa's glViewport command queries the current window size and updates
  38     its internal data structors accordingly.  This normally works fine
  39     since most applications call glViewport in responce to window size
  40     changes.
  41
  42     In some situations, however, the application may not call glViewport
  43     when a window size changes but would still like Mesa to adjust to
  44     the new window size.  This extension exports a new function to solve
  45     this problem.
  46
  47 New Procedures and Functions
  48
  49     void glResizeBuffersMESA( void )
  50
  51 New Tokens
  52
  53     none
  54
  55 Additions to the OpenGL Specification (no particular section)
  56
  57     The glResizeBuffersMESA command may be called when the client
  58     determines that a window has been resized.  Calling
  59     glResizeBuffersMESA causes Mesa to query the current window size
  60     and adjust its internal data structures.  This may include
  61     reallocating depth, stencil, alpha and accumulation buffers.
  62
  63 Additions to the AGL/GLX/WGL Specifications
  64
  65     None
  66
  67 Errors
  68
  69     INVALID_OPERATION is generated if ResizeBuffersMESA is called betweeen
  70     Begin and End.
  71
  72 New State
  73
  74     None.
  75
  76 New Implementation Dependent State
  77
  78     None.
  79
  80 Revision History
  81
  82   * Revision 1.0 - Initial specification