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X11R7.4 - man page for exa (x11r4 section 4)

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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 Ren-
	      der 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 1.6.0				   EXA(4)
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