NAME
gcpMapRGBAColor, gcpPackRGBAColors, gcpMapYUVColor, gcpPackYUVColors,
gcpMapCMYKColor, gcpPackCMYKColors, gcpMapHSVColor, gcpPackHSVColors,
gcpMapYCCColor, gcpPackYCCColors - Convert from gcp_*color(s) to
gcp_pixel(s)
SYNOPSIS
#include <ggi/gcp.h>
gcp_pixel gcpMapRGBAColor(ggi_visual_t vis,
gcp_RGBAcolor *col);
int gcpPackRGBAColors(ggi_visual_t vis,
void *buf,gcp_RGBAcolor *cols,int len);
gcp_pixel gcpMapYUVColor(ggi_visual_t vis,
gcp_YUVcolor *col);
int gcpPackYUVColors(ggi_visual_t vis,
void *buf,gcp_YUVcolor *cols,int len);
gcp_pixel gcpMapCMYKColor(ggi_visual_t vis,
gcp_CMYKcolor *col);
int gcpPackCMYKColors(ggi_visual_t vis,
void *buf,gcp_CMYKcolor *cols,int len);
gcp_pixel gcpMapHSVColor(ggi_visual_t vis,
gcp_HSVcolor *col);
int gcpPackHSVColors(ggi_visual_t vis,
void *buf,gcp_HSVcolor *cols,int len);
gcp_pixel gcpMapYCCColor(ggi_visual_t vis,
gcp_YCCcolor *col);
int gcpPackYCCColors(ggi_visual_t vis,
void *buf,gcp_YCCcolor *cols,int len);
DESCRIPTION
gcpMap*Color gets the pixelvalue for the given color.
gcpPack*Colors converts the colors in cols to pixelvalues in buf. The
output from this function is suitable for input to the
ggiPut{HLine,VLine,Box} functions.
Try to cache the results of color lookups in your application for
efficiency purposes.
RETURN VALUE
gcpMap*Color returns a gcp_pixel(3).
gcp*PackColors returns 0 for OK, otherwise an ggi-error(3) code.
SEE ALSO
gcp_pixel(3), gcpUnmapRGBAPixel(3), gcpUnpackRGBAPixels(3),
gcpUnmapYUVPixel(3), gcpUnpackYUVPixels(3), gcpUnmapCMYKPixel(3),
gcpUnpackCMYKPixels(3), gcpUnmapHSVPixel(3), gcpUnpackHSVPixels(3),
gcpUnmapYCCPixel(3), gcpUnpackYCCPixels(3) ggiPutBox(3),
ggiPutHLine(3), ggiPutVLine(3)