devg-rotate270.so

Transform module to rotate a display 270 degrees counterclockwise

Syntax:

io-graphics -d driver_name hook=devg-rotate270.so ... &

Runs on:

x86, PPC, MIPS, ARM, SH4

Options:

None.

Description:

The devg-rotate270.so transform module is used by io-graphics to switch the display between portrait and landscape views.

To load the devg-rotate270.so module into io-graphics, use the hook option. For more information on options, see io-graphics.

You need to modify the X and Y resolution passed to io-graphics using the xres and yres options when you use the transform module. For example, to rotate a 640x480 16-bit color display 270 degrees counterclockwise:

io-graphics -d driver_name hook=devg-rotate270.so,xres=640,yres=640,bitpp=16 ...

---

A 270-degree counterclockwise turn is equivalent to a 90-degree clockwise turn.

---

You can cascade transform modules to flip the display, i.e. rotate 180 degrees:

io-graphics -d driver_name hook=devg-rotate270.so:devg-rotate270.so ...

See also:

devg-rotate90.so, io-graphics