gcpMapRGBAColor(3)
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.