VOODOO(4)                                                                                                              VOODOO(4)



NAME
       voodoo - Voodoo video driver

SYNOPSIS
       Section "Device"
         Identifier "devname"
         Driver "voodoo"
         ...
       EndSection

DESCRIPTION
       voodoo  is an Xorg driver for Voodoo 1 and Voodoo 2 series video adapters.  On the Voodoo 1 the driver uses a shadow buf-
       fer 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.

       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.

       This driver supports 16bpp modes currently. The video hardware supports image conversion from  24bpp  to  16bpp  but  the
       hardware is 16bpp only.

       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).

       Multihead and Xinerama configurations are supported. SLI configurations will be treated as multiple video cards.

       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.

       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.

CONFIGURATION DETAILS
       Please refer to xorg.conf(5) for general configuration details.  This section only covers configuration details  specific
       to this driver.

       The following driver Options are supported:

       Option "ShadowFB" "boolean"
              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.

       Option "NoAccel" "boolean"
              Disables acceleration if set. Unless debugging this option should only be set if ShadowFB  is  enabled.   Default:
              off for voodoo2, on for voodoo1.

BUGS
       The driver interacts badly with the sstfb frame buffer driver as there is insufficient information to restore the chip to
       its previous state.

SEE ALSO
       Xorg(1), xorg.conf(5), Xserver(1), X(7)

AUTHORS
       Authors: Alan Cox, Ghozlane Toumi, Henrik Harmsen.



X Version 11                                         xf86-video-voodoo 1.2.4                                           VOODOO(4)