083b790515
This has been what has been used the most successfully post-damagetrack. The current thinking is that: 1) We should be able to accelerate basically everything. So we don't need to try to migrate trees of pixmaps permanently out of framebuffer to speed CPU drawing up. 2) Migration is cheaper in the thrashing case, so we don't want to go to a lot of effort to try (and fail badly) to find a working set.
41 lines
1.7 KiB
Plaintext
41 lines
1.7 KiB
Plaintext
.\" shorthand for double quote that works everywhere.
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.ds q \N'34'
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.TH EXA __drivermansuffix__ __vendorversion__
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.SH NAME
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exa \- new 2D acceleration architecture for X.Org
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.SH DESCRIPTION
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.B EXA
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provides a simple API for video drivers to implement for 2D acceleration. It
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is a module loaded by drivers, and is not intended to be loaded on its own. See
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your driver's manual page for how to enable
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.B EXA
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.
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.PP
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The
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.B EXA
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architecture is designed to make accelerating the Render extension simple and
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efficient, and results in various performance tradeoffs compared to XAA. Some
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options are available for debugging performance issues or driver rendering
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problems. They are not intended for general use.
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.TP
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.BI "Option \*qEXANoComposite\*q \*q" boolean \*q
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Disables acceleration of the Composite operation, which is at the heart of
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the Render extension. Not related to the Composite extension. Default: No.
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.TP
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.BI "Option \*qEXANoUploadToScreen\*q \*q" boolean \*q
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Disables acceleration of uploading pixmap data to the freamebuffer. Default: No.
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.TP
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.BI "Option \*qEXANoDownloadFromScreen\*q \*q" boolean \*q
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Disables acceleration of downloading of pixmap data from the framebuffer.
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.B NOTE:
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Not usable with drivers which rely on DownloadFromScreen succeeding.
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Default: No.
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.TP
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.BI "Option \*qMigrationHeuristic\*q \*q" anystr \*q
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Chooses an alternate pixmap migration heuristic, for debugging purposes. The
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default is intended to be the best performing one for general use, though others
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may help with specific use cases. Available options include \*qalways\*q,
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\*qgreedy\*q, and \*qsmart\*q. Default: always.
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.SH AUTHORS
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Authors include: Keith Packard, Eric Anholt, Zack Rusin, and Michel Dänzer
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