EXA(4)                                                                                                                    EXA(4)



NAME
       exa - new 2D acceleration architecture for X.Org

DESCRIPTION
       EXA  provides  a simple API for video drivers to implement for 2D acceleration.  It is a module loaded by drivers, and is
       not intended to be loaded on its own.  See your driver's manual page for how to enable EXA.

       The EXA architecture is designed to make accelerating the Render extension simple and efficient, and results  in  various
       performance  tradeoffs  compared to XAA.  Some xorg.conf options are available for debugging performance issues or driver
       rendering problems.  They are not intended for general use.

       Option "EXANoComposite" "boolean"
              Disables acceleration of the Composite operation, which is at the heart of the Render extension.  Not  related  to
              the Composite extension.  Default: No.

       Option "EXANoUploadToScreen" "boolean"
              Disables acceleration of uploading pixmap data to the framebuffer. Default: No.

       Option "EXANoDownloadFromScreen" "boolean"
              Disables  acceleration  of  downloading  of pixmap data from the framebuffer.  NOTE: Not usable with drivers which
              rely on DownloadFromScreen succeeding.  Default: No.

       Option "MigrationHeuristic" "anystr"
              Chooses an alternate pixmap migration heuristic, for debugging purposes.  The default is intended to be  the  best
              performing  one  for  general  use,  though  others  may  help with specific use cases.  Available options include
              "always", "greedy", and "smart".  Default: always.

SEE ALSO
       Xorg(1), xorg.conf(5).

AUTHORS
       Authors include: Keith Packard, Eric Anholt, Zack Rusin, and Michel Danzer



X Version 11                                            xorg-server 1.9.5                                                 EXA(4)