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#include <Xw_Extension.h>
/* ifdef then trace on */
#ifdef TRACE
#define TRACE_DEF_BACKGROUND_COLOR
#endif
/*
XW_STATUS Xw_def_background_color(awindow,r,g,b):
XW_EXT_WINDOW *awindow
float r,g,b ; Red,Green,Blue color value 0. >= x <= 1.
Update Background Color index with the specified R,G,B values .
Returns ERROR if Extended Window or Colormap is wrong
Returns SUCCESS if Successful
*/
#ifdef XW_PROTOTYPE
XW_STATUS Xw_def_background_color (void* awindow,
float r,float g,float b)
#else
XW_STATUS Xw_def_background_color (awindow,r,g,b)
void *awindow;
float r,g,b ;
#endif /*XW_PROTOTYPE*/
{
XW_EXT_WINDOW *pwindow = (XW_EXT_WINDOW*)awindow ;
XW_EXT_COLORMAP *pcolormap ;
unsigned long backpixel,highpixel ;
XColor color ;
int i,index,cclass,isapproximate ;
XW_STATUS status = XW_SUCCESS;
if ( !Xw_isdefine_window(pwindow) ) {
/*ERROR*Bad EXT_WINDOW Address*/
Xw_set_error(24,"Xw_def_background_color",pwindow) ;
return (XW_ERROR) ;
}
if ( !Xw_isdefine_colormap(_COLORMAP) ) {
/*ERROR*Bad EXT_COLORMAP Address*/
Xw_set_error(42,"Xw_def_background_color",_COLORMAP) ;
return (XW_ERROR) ;
}
pcolormap = _COLORMAP ;
index = pwindow->backindex ;
if( index >= 0 ) {
if( pcolormap->define[index] != BACKCOLOR ) {
for( i=0 ; i<pcolormap->maxcolor ; i++ ) {
if( pcolormap->define[i] == FREECOLOR ) break;
}
if( i < pcolormap->maxcolor ) {
index = i ;
pcolormap->define[i] = BACKCOLOR;
}
}
if( pcolormap->mapping == Xw_TOM_READONLY ) {
cclass = StaticColor;
} else {
cclass = _CCLASS;
}
switch ( cclass ) {
case TrueColor :
Xw_get_color_pixel(pcolormap,r,g,b,&backpixel,&isapproximate) ;
break ;
case PseudoColor :
if( pcolormap->mapping == Xw_TOM_COLORCUBE ) {
if( (_CGINFO.red_mult > 0) && (fabs(r-g) < 0.01) && (fabs(r-b) < 0.01) ) {
index = (int)(0.5+r*_CGINFO.red_max)*_CGINFO.red_mult;
if( _CINFO.red_max > 0 )
index += (_CINFO.red_max+1)*(_CINFO.green_max+1)*(_CINFO.blue_max+1);
} else if( _CINFO.red_mult > 0 ) {
index = ((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.;
index = (int)(0.5+l*_CGINFO.red_max)*_CGINFO.red_mult;
} else {
index = 0;
}
backpixel = _CINFO.base_pixel = index;
} else if( pcolormap->define[index] == BACKCOLOR ) {
color.pixel = backpixel = 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(_DISPLAY,_CINFO.colormap,&color) ;
}
break ;
case StaticColor :
status = Xw_alloc_color(pcolormap,r,g,b,&backpixel,&isapproximate) ;
break ;
}
if( status ) {
pwindow->backindex = index ;
pcolormap->pixels[index] = backpixel ;
}
} else {
backpixel = pcolormap->backpixel ; /* Transparent window */
}
if( status ) {
highpixel = pcolormap->highpixel ^ backpixel ;
XSetWindowBackground (_DISPLAY, _WINDOW, backpixel) ;
XSetBackground(_DISPLAY, pwindow->qgwind.gc, backpixel) ;
XSetBackground(_DISPLAY, pwindow->qgwind.gccopy, backpixel) ;
XSetBackground(_DISPLAY, pwindow->qgwind.gcclear, backpixel) ;
XSetBackground(_DISPLAY, pwindow->qgwind.gchigh, backpixel) ;
XSetForeground(_DISPLAY, pwindow->qgwind.gcclear, backpixel) ;
XSetForeground(_DISPLAY, pwindow->qgwind.gchigh, highpixel) ;
for( i=0 ; i<MAXQG ; i++ ) {
XSetBackground(_DISPLAY, pwindow->qgline[i].gc, backpixel);
XSetBackground(_DISPLAY, pwindow->qgpoly[i].gc, backpixel);
XSetBackground(_DISPLAY, pwindow->qgtext[i].gc, backpixel);
XSetBackground(_DISPLAY, pwindow->qgmark[i].gc, backpixel);
}
}
#ifdef TRACE_DEF_BACKGROUND_COLOR
if( Xw_get_trace() ) {
printf(" %d = Xw_def_background_color(%lx,%f,%f,%f)\n",status,(long ) pwindow,r,g,b) ;
}
#endif
return (status);
}
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