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# Qt/Embedded environment variables

QWS_SW_CURSOR If defined, always use a software mouse cursor even when using an accelerated driver that supports a hardware cursor

QWS_DISPLAY Defines display type and framebuffer - e.g. Voodoo3 Mach64:/dev/fb1 Defaults to unaccelerated Linux framebuffer driver on /dev/fb0. Valid drivers are QVfb, VGA16, LinuxFb (unaccelerated Linux framebuffer), Mach64 (accelerated for ATI Mach64 cards such as the Rage Pro), Voodoo3 (accelerated for the 3dfx Voodoo 3, should also work on Voodoo Banshee), Matrox (should work on all Matrox graphics cards since the Matrox Millennium), Transformed(for rotated displays), SVGALIB and VNC. Transformed displays have a special format - within the specification should be a multiple of 90 degrees rotation specified as Rot<x>, for instance Transformed:Rot90.

QTDIR If defined tells Qt/Embedded to where to find its fonts - fontdir should be in $QTDIR/etc/fonts/. If undefined it's assumed to be /usr/local/qt-embedded

QWS_SIZE If defined forces Qt/Embedded into a window of <width>x<height> size centred within the screen, e.g. 320x200

QWS_NOMTRR If defined, don't use Memory Type Range Registers to define the framebuffer as write-combined on x86. Write-combining speeds up graphics output.

QWS_CARD_SLOT Tells the accelerated drivers which card to attempt to accelerate. This should be a path in /proc/bus/pci. It defaults to /proc/bus/pci/01/00.0 - the first device on the second PCI bus in the system, which is normally the AGP card.

QWS_MOUSE_PROTO Defined as <type>:<device>, e.g. Microsoft:/dev/ttyS0. If you want to use a USB mouse directly (separate from X) use MouseMan:/dev/input/mouse0 or similar. Valid mouse protocls are Auto (automatically sense protocol), MouseMan, IntelliMouse, Microsoft, QVfbMouse (only useful with QVfb) and TPanel, a sample touch panel driver.

QWS_KEYBOARD Defines the keyboard type. Multiple keyboards can be handled at once, input will be read from all of them. Valid values:

- Buttons - an system-dependent button device.
- QVfbKeyboard - connect to the Qt Virtual FrameBuffer.
- TTY:device - a PC101 keyboard on given device (default device is /dev/tty0).
- USB:device - a PC101 keyboard on given device (default device is /dev/input/event0).