NAME

cgthree − Sun386i color memory frame buffer

CONFIG

device cgthree0 at obmem ? csr 0xA0400000

AVAILABILITY

Sun386i systems only. 

DESCRIPTION

cgthree is a color memory frame buffer.  It provides the standard frame buffer interface as defined in fbio(4S). 

In addition to the ioctls described under fbio(4S), the cgthree interface responds to two cgthree-specific colormap ioctl(2) parameters, FBIOPUTCMAP and .SB FBIOGETCMAP. FBIOPUTCMAP returns no information other than success/failure via the ioctl return value.  FBIOGETCMAP returns its information in the arrays pointed to by the red, green, and blue members of its fbcmap structure argument; fbcmap is defined in sun/fbio.h as:

struct fbcmap {
intindex;/∗ first element (0 origin) ∗/
intcount;/∗ number of elements ∗/
unsigned char∗red;/∗ red color map elements ∗/
unsigned char∗green;/∗ green color map elements ∗/
unsigned char∗blue;/∗ blue color map elements ∗/
};

FILES

/dev/cgthree0

SEE ALSO

mmap(2), fbio(4S)

Sun Release 4.0  —  Last change: 22 March 1989