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/* The getvisuals routine gets a visual or visuals for the bitmap and line */
/* graphics windows. The following visuals are tried: */
/* (1) The default visual & color map for both of them. */
/* (2) Any visual which could have both of them in the same color map */
/* (3) (figdisp only) Bitmap in the default color map, line in anything */
/* (4) (figdisp only) Line in the default color map, bitmap in anything */
/* (5) (figdisp only) Bitmap and line in separate, non default anything */
/* (6) Reduce lg.colors to 16 (if possible) and repeat */
/* (7) Get a visual for bitmap graphics (steps 1-5) */
/* (8) Try to get a read-only visual & color map for line graphics with the */
/* original number of colors */
/* (9) Reduce lg.colors to 16 (if possible) and repeat step 8. */
/* (10) Reduce lg.colors to 2 and use BlackPixel and WhitePixel in default */
/* Return Values: */
/* FAIL If we couldn't get any appropriate visual combination. */
/* SUCCEED If everything went fine. */
/* Sam Southard, Jr. */
/* Created: 20-Feb-1992 (complete re-write of getbmvisual routine) */
/* Modification History: */
/* 25-Feb-1992 SNS/CIT Now initializes bit & line graphics color maps to the */
/* default. */
/* 5-Mar-1992 SNS/CIT Now handles grayscale and read-only visuals better */
/* 6-Mar-1992 SNS/CIT getcolors now takes a min and max visual depth. */
/* 9-Mar-1992 SNS/CIT Silly bug in two color mode fixed */
#include "figdisp.h"
#include "globals.h"
#include "messages.h"
#include <stdio.h>
#define MAX_DEPTH 24 /* the maximum visual depth to use */
int getvisuals()
{
int i; /* Silly loop variable */
int linecolors; /* max number of line colors */
XColor color; /* a color table entry */
Visual *defvis; /* The default visual */
int defro; /* if the default visual is read-only */
linecolors=lg.colors=res.lgcolors; /* let's be optimistic */
bm.bw=lg.bw=lg.ro=0; /* more optimism */
bitvisual=linevisual=NULL;
bitcmap=linecmap=DefaultColormap(display,screen);
defvis=DefaultVisual(display, screen);
/* see if the default visual is read-only */
if (defvis->class == StaticGray || defvis->class == StaticColor ||
defvis->class == TrueColor) defro=1;
else defro=0;
#ifdef PGDISP
/* we don't have any bitmap colors in pgdisp */
res.maxcolors=res.maxpcolors=res.mincolors=res.minpcolors=0;
#endif
/* we have our standards */
if (lg.colors < 2) lg.colors=res.lgcolors=linecolors=2;
/* Go ahead and allocate room for the number of colors we may need. */
/* Don't worry about waste, since it won't be very large */
i= lg.colors;
if (res.savecolors > res.leavecolors) i += res.savecolors;
else i += res.leavecolors;
if ((lg.pix=(unsigned long *)malloc(i*sizeof(unsigned long))) == NULL)
{
(void)fprintf(stderr,MSG_MALLOC);
return(FAIL);
}
if (res.maxpcolors < res.maxcolors) i=res.maxcolors;
else i=res.maxpcolors;
i += lg.colors;
if (res.savecolors > res.leavecolors) i += res.savecolors;
else i += res.leavecolors;
if ((bm.pix=(unsigned long *)malloc(i*sizeof(unsigned long))) == NULL)
{
(void)fprintf(stderr,MSG_MALLOC);
free(lg.pix);
return(FAIL);
}
/* As long as we're not doing Black & White */
while (lg.colors > 2)
{
/* First step is to simply try the default color map, if it's */
/* not read-only, and then any visual which could handle them */
/* both. Bitmap graphics requires an 8-bit visual. */
if ((!defro &&
(bm.colors=getcolors(UseDefaultCmap, &bitvisual, &bitcmap,
bm.pix, res.maxcolors+res.leavecolors+lg.colors,
res.mincolors+res.leavecolors+lg.colors, &bitdepth, 8,
8))) ||
(bm.colors=getcolors(UseRWVisual, &bitvisual, &bitcmap,
bm.pix, res.maxpcolors+res.savecolors+lg.colors,
res.minpcolors+res.savecolors+lg.colors, &bitdepth, 8,
8)))
{ /* success! */
bm.colors -= lg.colors; /* we allocated both */
/* Free up the res.leavecolors extra we got */
if (res.leavecolors > 0 &&
bitcmap == DefaultColormap(display,screen))
{
XFreeColors(display, bitcmap,
bm.pix+bm.colors+lg.colors,
res.leavecolors, 0);
bm.colors -= res.leavecolors;
}
/* copy some from the default color map */
if (bitcmap != DefaultColormap(display,screen))
{
for (i=0 ; i < res.savecolors ; ++i)
{
if (bitvisual->class == DirectColor)
break;
color.pixel=bm.pix[i];
if (bm.pix[i] >= defvis->map_entries)
continue;
XQueryColor(display,
DefaultColormap(display,screen),
&color);
color.flags = DoRed | DoGreen | DoBlue;
XStoreColor(display, bitcmap, &color);
}
/* update the pixel table to forget. Don't */
/* just change the pointer because we'll get */
/* in trouble when we do a free */
for (i=0 ; i <bm.colors+lg.colors ; ++i)
bm.pix[i]=bm.pix[i+res.savecolors];
bm.colors -= res.savecolors;
}
#ifdef PGDISP
(void)printf("Got %d line colors in ", lg.colors);
#else
(void)printf("Got %d bitmap and %d line colors in ",
bm.colors, lg.colors);
#endif
if (bitcmap == DefaultColormap(display, screen))
(void)printf("default color map\n");
else (void)printf("private color map\n");
/* now get the line graphics pixels */
for (i=0 ; i < lg.colors ; ++i)
lg.pix[i]=bm.pix[bm.colors+i];
linevisual=bitvisual;
linecmap=bitcmap;
linedepth=bitdepth;
break; /* don't try other schemes */
}
#ifndef PGDISP
/* we can't put them together, maybe we can separate them */
for (i=0 ; i < 3 ; ++i)
{
if (i == 0
&& (bm.colors=getcolors(UseDefaultCmap, &bitvisual,
&bitcmap, bm.pix, res.maxcolors+res.leavecolors,
res.mincolors+res.leavecolors, &bitdepth, 8, 8))
&& (lg.colors=getcolors(UseRWVisual, &linevisual,
&linecmap, lg.pix, res.lgcolors+res.savecolors,
res.lgcolors+res.savecolors, &linedepth,
MAX_DEPTH, 1))
|| i == 1
&& (bm.colors=getcolors(UseRWVisual, &bitvisual,
&bitcmap, bm.pix, res.maxpcolors+res.savecolors,
res.minpcolors+res.savecolors, &bitdepth, 8, 8))
&& (lg.colors=getcolors(UseDefaultCmap, &linevisual,
&linecmap, lg.pix, res.lgcolors+res.leavecolors,
res.lgcolors+res.leavecolors, &linedepth,
MAX_DEPTH, 1))
|| i == 2
&& (bm.colors=getcolors(UseRWVisual, &bitvisual,
&bitcmap, bm.pix, res.maxpcolors+res.savecolors,
res.minpcolors+res.savecolors, &bitdepth, 8, 8))
&& (lg.colors=getcolors(UseRWVisual, &linevisual,
&linecmap, lg.pix, res.lgcolors+res.savecolors,
res.lgcolors+res.savecolors, &linedepth,
MAX_DEPTH, 1)))
break;
/* if we got here, we may have been able to allocate */
/* some bitmap colors */
if (bm.colors) XFreeColors(display, bitcmap, bm.pix,
bm.colors, 0);
}
if (bm.colors && lg.colors)
{ /* whew - something worked */
if (bitcmap == DefaultColormap(display, screen))
{
if (res.leavecolors > 0) XFreeColors(display,
bitcmap, bm.pix+bm.colors,
res.leavecolors, 0);
bm.colors -= res.leavecolors;
} else { /* copy */
for (i=0 ; i < res.savecolors ; ++i)
{
if (bitvisual->class == DirectColor)
break;
color.pixel=bm.pix[i];
if (bm.pix[i] >= defvis->map_entries)
continue;
XQueryColor(display,
DefaultColormap(display,screen),
&color);
color.flags= DoRed | DoGreen | DoBlue;
XStoreColor(display, bitcmap, &color);
}
bm.colors -= res.savecolors;
/* forget about the first few pixels */
for (i=0 ; i < bm.colors ; ++i)
bm.pix[i]=bm.pix[i+res.savecolors];
}
(void)printf("Got %d bitmap colors in ", bm.colors);
if (bitcmap == DefaultColormap(display, screen))
(void)printf("default color map\n");
else (void)printf("private color map\n");
if (linecmap == DefaultColormap(display, screen))
{
if (res.leavecolors > 0) XFreeColors(display,
linecmap, lg.pix+lg.colors,
res.leavecolors, 0);
lg.colors -= res.leavecolors;
} else { /* copy */
for (i=0 ; i < res.savecolors ; ++i)
{
if (linevisual->class == DirectColor)
break;
color.pixel=lg.pix[i];
if (lg.pix[i] >= defvis->map_entries)
continue;
XQueryColor(display,
DefaultColormap(display,screen),
&color);
color.flags= DoRed | DoGreen | DoBlue;
XStoreColor(display, linecmap, &color);
}
lg.colors -= res.savecolors;
/* forget about the first few pixels */
for (i=0 ; i < lg.colors ; ++i)
lg.pix[i]=lg.pix[i+res.savecolors];
}
(void)printf("Got %d line graphics colors in ",
lg.colors);
if (linecmap == DefaultColormap(display, screen))
(void)printf("default color map\n");
else (void)printf("private color map\n");
break; /* don't try other schemes */
}
#endif /* FIGDISP */
/* we did all we can with this many colors, so try with only */
/* 16 colors */
if (res.lgcolors > 16) res.lgcolors=lg.colors=16;
else res.lgcolors=lg.colors=2;
}
if (linevisual != NULL && linevisual->class == GrayScale) lg.bw=1;
if (bitvisual != NULL && bitvisual->class == GrayScale) bm.bw=1;
/* did we make it out alive? */
if (lg.colors > 2) return(SUCCEED);
#ifndef PGDISP
/* we need a read-write for bitmap graphics */
if ((bm.colors=getcolors(UseDefaultCmap, &bitvisual, &bitcmap, bm.pix,
res.maxcolors+res.leavecolors, res.mincolors+res.leavecolors,
&bitdepth))
|| (bm.colors=getcolors(UseRWVisual, &bitvisual, &bitcmap, bm.pix,
res.maxcolors+res.savecolors, res.mincolors+res.savecolors,
&bitdepth)))
{ /* success! */
if (bitcmap == DefaultColormap(display, screen))
{
if (res.leavecolors > 0) XFreeColors(display, bitcmap,
bm.pix+bm.colors, res.leavecolors, 0);
bm.colors -= res.leavecolors;
} else { /* copy */
for (i=0 ; i < res.savecolors ; ++i)
{
if (bitvisual->class == DirectColor)
break;
color.pixel=bm.pix[i];
if (bm.pix[i] >= defvis->map_entries)
continue;
XQueryColor(display,
DefaultColormap(display,screen),
&color);
color.flags= DoRed | DoGreen | DoBlue;
XStoreColor(display, bitcmap, &color);
}
bm.colors -= res.savecolors;
/* forget about the first few pixels */
for (i=0 ; i < bm.colors ; ++i)
bm.pix[i]=bm.pix[i+res.savecolors];
}
(void)printf("Got %d bitmap colors in ", bm.colors);
if (bitcmap == DefaultColormap(display, screen))
(void)printf("default color map\n");
else (void)printf("private color map\n");
} else { /* we're not gonna make it - we need LUT manipulation */
(void)fprintf(stderr, MSG_NOCOLORS);
return(FAIL);
}
#endif
/* Let's try a read-only for line graphics */
res.lgcolors=linecolors;
lg.ro=1;
while (res.lgcolors > 2)
{
if (lg.colors=getcolors(UseROVisual, &linevisual, &linecmap,
lg.pix, res.lgcolors, res.lgcolors, &linedepth)) break;
/* lower our standards */
if (res.lgcolors > 16) res.lgcolors=16;
else res.lgcolors=2;
}
if (res.lgcolors <= 2)
{ /* Sorry, all we can do is BlackPixel & WhitePixel */
lg.pix[0]=BlackPixel(display, screen);
lg.pix[1]=WhitePixel(display, screen);
linecmap=DefaultColormap(display, screen);
linedepth=DefaultDepth(display, screen);
linevisual=DefaultVisual(display, screen);
lg.colors=2;
}
if (linevisual->class == StaticGray) lg.bw=1;
if (bitvisual->class == GrayScale) bm.bw=1;
(void)printf("Got %d read-only line graphics colors in ", lg.colors);
if (linecmap == DefaultColormap(display, screen))
(void)printf("default color map\n");
else (void)printf("private color map\n");
return(SUCCEED);
}
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