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- .\" shorthand for double quote that works everywhere.
- .ds q \N'34'
- .TH VOODOO __drivermansuffix__ __vendorversion__
- .SH NAME
- voodoo \- Voodoo video driver
- .SH SYNOPSIS
- .nf
- .B "Section \*qDevice\*q"
- .BI " Identifier \*q" devname \*q
- .B " Driver \*qvoodoo\*q"
- \ \ ...
- .B EndSection
- .fi
- .SH DESCRIPTION
- .B voodoo
- is an __xservername__ driver for Voodoo 1 and Voodoo 2 series video adapters.
- On the Voodoo 1 the driver uses a shadow buffer in system memory as
- the video adapter has only 3D acceleration. Selected portions of the shadow
- framebuffer are copied out to the Voodoo board at the right time. Because
- of this, the speed of the driver is very dependent on the CPU. Processors
- nowadays are actually rather fast at moving data so we get very good speed
- anyway as the shadow framebuffer is in cached RAM.
- .PP
- The Voodoo2 has 16bpp acceleration and the driver provides accelerated
- versions of most operations except angled lines and stipples. Accelerated
- alpha blending with the Render extension is also supported as is DGA.
- .PP
- This driver supports 16bpp modes currently. The video hardware supports
- image conversion from 24bpp to 16bpp but the hardware is 16bpp only.
- .PP
- The Voodoo 1 series cards can go up to 800x600 resolution while the
- Voodoo 2 can reach 1024x768 providing it has at least 2Mb of frame
- buffer memory. 1024x768 2D mode does not require two cards configured in
- scan-line interleave mode (SLI).
- .PP
- Multihead and Xinerama configurations are supported. SLI configurations will
- be treated as multiple video cards.
- .PP
- Limited support for DPMS screen saving is available. The "standby" and
- "suspend" modes are just painting the screen black. The "off" mode turns
- the Voodoo board off and thus works correctly.
- .PP
- This driver does not support a virtual screen size different from the
- display size. This is a hardware limitation. 3D rendering is also not
- supported.
- .SH CONFIGURATION DETAILS
- Please refer to __xconfigfile__(__filemansuffix__) for general configuration
- details. This section only covers configuration details specific to this
- driver.
- .PP
- The following driver
- .B Options
- are supported:
- .TP
- .BI "Option \*qShadowFB\*q \*q" boolean \*q
- Enables a shadow buffer in main memory. This turns off acceleration but for
- otherwise unaccelerated operations can improve performance materially.
- Default: off for voodoo2, on for voodoo1.
- .TP
- .BI "Option \*qNoAccel\*q \*q" boolean \*q
- Disables acceleration if set. Unless debugging this option should only
- be set if ShadowFB is enabled.
- Default: off for voodoo2, on for voodoo1.
- .SH "BUGS"
- The driver interacts badly with the
- sstfb frame buffer driver as there is insufficient information to restore
- the chip to its previous state.
- .SH "SEE ALSO"
- __xservername__(1), __xconfigfile__(__filemansuffix__), Xserver(1), X(__miscmansuffix__)
- .SH AUTHORS
- Authors: Alan Cox, Ghozlane Toumi, Henrik Harmsen.
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