man > exa(4)

EXA(4)                                Kernel Interfaces Manual                                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  effi‐
       cient,  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".   De‐
              fault: always.

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

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

X Version 11                             xorg-server 21.1.11                                  EXA(4)