blink(3G)blink(3G)NAMEblink - changes a color map entry at a selectable rate
C SPECIFICATION
void blink(rate, i, red, green, blue)
short rate;
Colorindex i;
short red, green, blue;
PARAMETERS
rate expects the number of vertical retraces per blink. On the
standard monitor, there are 60 vertical retraces per second.
i expects an index into the current color map. The color defined
at that index is the color that is blinked (alternated).
red expects the red value of the alternate color that blinks against
the color selected from the color map by the i parameter.
green expects the green value of the alternate color that blinks
against the color selected from the color map by the i parameter.
blue expects the blue value of the alternate color that blinks against
the color selected from the color map by the i parameter.
DESCRIPTIONblink alternates the color located at index i in the current color map
with the color defined by the parameters red, green, and blue. The rate
at which the two colors are alternated is set by the rate parameter. The
maximum number of color map entries that can be blinking simultaneously
on a screen is returned by the getgdesc inquiry GD_NBLINKS.
The length of time between retraces varies according to the monitor used.
On the standard monitor, there are 60 retraces per second, so a rate of
60 would cause the color to change once every second.
To terminate blinking and restore the original color for a single color
map entry, call blink for that entry with rate set to 0.
To terminate all blinking colors simultaneously, call blink with rate set
to -1. When rate is -1, the other parameters are ignored.
SEE ALSO
getgdesc, mapcolor
NOTES
This routine is available only in immediate mode.
BUGSblink always operates on the colormap of the normal framebuffer,
regardless of the current drawmode. It is not possible to blink overlay
or underlay colors.
Page 1
