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#include <Xw_Extension.h>
/* ifdef then trace on */
#ifdef TRACE
#define TRACE_DEF_COLOR
#endif
/*
XW_STATUS Xw_def_color(acolormap,index,r,g,b):
XW_EXT_COLORMAP *acolormap
int index ; Color index 0 >= x < MAXCOLOR
float r,g,b ; Red,Green,Blue color value 0. >= x <= 1.
Update Color Extended colormap index with the specified R,G,B values .
Returns ERROR if BadColor Index
Returns SUCCESS if Successful
*/
#ifdef XW_PROTOTYPE
XW_STATUS Xw_def_color (void* acolormap,
int index,float r,float g,float b)
#else
XW_STATUS Xw_def_color (acolormap,index,r,g,b)
void *acolormap;
int index ;
float r,g,b ;
#endif /*XW_PROTOTYPE*/
{
XW_EXT_COLORMAP *pcolormap = (XW_EXT_COLORMAP*)acolormap ;
XColor color ;
int cclass,isapproximate;
unsigned long pixel;
XW_STATUS status = XW_SUCCESS;
if ( !Xw_isdefine_colorindex(pcolormap,index) ) {
/*ERROR*Bad Color Index*/
Xw_set_error(1,"Xw_def_color",&index) ;
return (XW_ERROR) ;
}
if( pcolormap->mapping == Xw_TOM_READONLY ) {
cclass = StaticColor;
} else {
cclass = _CCLASS;
}
switch (cclass) {
case TrueColor :
Xw_get_color_pixel(pcolormap,r,g,b,&pixel,&isapproximate) ;
break ;
case PseudoColor :
if( pcolormap->mapping == Xw_TOM_COLORCUBE ) {
int kindex;
if( (_CGINFO.red_mult > 0) && (fabs(r-g) < 0.01) && (fabs(r-b) < 0.01) ) {
kindex = (int)(0.5+r*_CGINFO.red_max)*_CGINFO.red_mult;
if( _CINFO.red_max > 0 )
kindex += (_CINFO.red_max+1)*(_CINFO.green_max+1)*(_CINFO.blue_max+1);
} else if( _CINFO.red_mult > 0 ) {
kindex = ((int)(0.5+r*_CINFO.red_max))*_CINFO.red_mult+
((int)(0.5+g*_CINFO.green_max))*_CINFO.green_mult+
((int)(0.5+b*_CINFO.blue_max))*_CINFO.blue_mult;
} else if( _CGINFO.red_mult > 0 ) {
float l = (r+g+b)/3.;
kindex = (int)(0.5+l*_CGINFO.red_max)*_CGINFO.red_mult;
} else {
kindex = 0;
}
pixel = _CINFO.base_pixel + kindex;
} else {
color.pixel = pixel = pcolormap->pixels[index] ;
color.red = (unsigned short) (r * 0xFFFF) ;
color.green = (unsigned short) (g * 0xFFFF) ;
color.blue = (unsigned short) (b * 0xFFFF) ;
color.flags = DoRed|DoGreen|DoBlue ;
XStoreColor(_CDISPLAY,_CINFO.colormap,&color) ;
}
break ;
case StaticColor :
status = Xw_alloc_color(pcolormap,r,g,b,&pixel,&isapproximate) ;
break ;
}
if( status ) {
pcolormap->define[index] = USERCOLOR ;
pcolormap->pixels[index] = pixel ;
}
#ifdef TRACE_DEF_COLOR
if( Xw_get_trace() ) {
printf(" %d = Xw_def_color(%lx,%d,%f,%f,%f)\n",status,(long ) pcolormap,index,r,g,b) ;
}
#endif
return (status);
}
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