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xvcolor.c
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xvcolor.c
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/*
* xvcolor.c - color allocation/sorting/freeing code
*
* Author: John Bradley, University of Pennsylvania
* (bradley@cis.upenn.edu)
*
* Contains:
* void SortColormap()
* void ColorCompress8(trans)
* void AllocColors()
* void FreeColors()
* Status xvAllocColor()
* void xvFreeColors()
* void ApplyEditColor();
* int MakeStdCmaps();
* void MakeBrowCmap();
* void ChangeCmapMode();
*/
#include "copyright.h"
#include "xv.h"
static void allocROColors PARM((void));
static void allocRWColors PARM((void));
static void putECfirst PARM((void));
static void diverseOrder PARM((byte *, byte *, byte *, int, byte *));
static void freeStdCmaps PARM((void));
static int highbit PARM((unsigned long));
static char stdCmapSuccess[80];
/************************************************/
/* structure and routine used in SortColormap() */
/************************************************/
typedef struct thing {
byte r,g,b, n; /* actual value of color + alignment */
int oldindex; /* its index in the old colormap */
int use; /* # of pixels of this color */
int mindist; /* min distance to a selected color */
} CMAPENT;
/***********************************/
void SortColormap(pic, pwide, phigh, pnumcols, rmap,gmap,bmap, order, trans)
byte *pic, *rmap, *gmap, *bmap, *order, *trans;
int pwide, phigh, *pnumcols;
{
/* operates on 8-bit images. sorts the colormap into 'best' order
* 'order' is the 'best' order to allocate the colors. 'trans' is a
* transformation to be done to pic, cpic, and epic (in PIC8 mode) to
* compress the colormap
*/
byte *p;
int i, j, mdist, entry, d, hist[256], ncols;
static CMAPENT c[256], c1[256], *cp, *cj, *ck;
/* init some stuff */
for (i=0; i<256; i++) order[i]=i;
/* initialize histogram and compute it */
for (i=0; i<256; i++) hist[i]=0;
for (i=pwide*phigh, p=pic; i; i--, p++) hist[*p]++;
if (DEBUG>1) {
fprintf(stderr,"%s: Desired colormap\n",cmd);
for (i=0; i<256; i++)
if (hist[i]) fprintf(stderr,"(%3d %02x,%02x,%02x %d)\n",
i,rmap[i],gmap[i],bmap[i], hist[i]);
fprintf(stderr,"\n\n");
}
/* put the actually-used colors into the 'c' array in the order they occur
also, while we're at it, calculate ncols, and close up gaps in
colortable */
for (i=ncols=0; i<256; i++) {
if (hist[i]) {
rmap[ncols] = rmap[i];
gmap[ncols] = gmap[i];
bmap[ncols] = bmap[i];
trans[i] = (byte) ncols;
cp = &c[ncols];
cp->r = rmap[i]; cp->g = gmap[i]; cp->b = bmap[i];
cp->use = hist[i]; cp->oldindex = ncols;
cp->mindist = 1000000; /* 255^2 * 3 = 195075 */
ncols++;
}
}
/* find most-used color, put that in c1[0] */
entry = -1; mdist = -1;
for (i=0; i<ncols; i++) {
if (c[i].use > mdist) { mdist = c[i].use; entry=i; }
}
xvbcopy((char *) &c[entry], (char *) &c1[0], sizeof(CMAPENT));
c[entry].use = 0; /* dealt with */
/* sort rest of colormap. Half of the entries are allocated on the
basis of distance from already allocated colors, and half on the
basis of usage. (NB: 'taxicab' distance is used throughout this file.)
Mod: pick first 10 colors based on maximum distance. pick remaining
colors half by distance and half by usage -- JHB
To obtain O(n^2) performance, we keep each unselected color
(in c[], with use>0) marked with the minimum distance to any of
the selected colors (in c1[]). Each time we select a color, we
can update the minimum distances in O(n) time.
mod by Tom Lane Tom.Lane@g.gp.cs.cmu.edu */
for (i=1; i<ncols; i++) {
int ckR, ckG, ckB;
/* Get RGB of color last selected and choose selection method */
ck = &c1[i-1]; /* point to just-selected color */
ckR = ck->r; ckG = ck->g; ckB = ck->b;
/* Now find the i'th most different color */
if (i&1 || i<10) {
/* select the unused color that has the greatest mindist */
entry = -1; mdist = -1;
for (j=0, cj=c; j<ncols; j++,cj++) {
if (cj->use) { /* this color has not been marked already */
/* update mindist */
d = (cj->r - ckR)*(cj->r - ckR) +
(cj->g - ckG)*(cj->g - ckG) +
(cj->b - ckB)*(cj->b - ckB);
if (cj->mindist > d) cj->mindist = d;
if (cj->mindist > mdist) { mdist = cj->mindist; entry = j; }
}
}
}
else {
/* select the unused color that has the greatest usage */
entry = -1; mdist = -1;
for (j=0, cj=c; j<ncols; j++,cj++) {
if (cj->use) { /* this color has not been marked already */
/* update mindist */
d = (cj->r - ckR)*(cj->r - ckR) +
(cj->g - ckG)*(cj->g - ckG) +
(cj->b - ckB)*(cj->b - ckB);
if (cj->mindist > d) cj->mindist = d;
if (cj->use > mdist) { mdist = cj->use; entry = j; }
}
}
}
/* c[entry] is the next color to put in the map. do so */
xvbcopy((char *) &c[entry], (char *) &c1[i], sizeof(CMAPENT));
c[entry].use = 0;
}
for (i=0; i<ncols; i++) order[i] = (byte) c1[i].oldindex;
if (DEBUG>1) {
fprintf(stderr,"%s: result of sorting colormap\n",cmd);
for (i=0; i<ncols; i++)
fprintf(stderr,"(%3d %02x,%02x,%02x) ",i,rmap[i],gmap[i],bmap[i]);
fprintf(stderr,"\n\n");
fprintf(stderr,"%s: allocation order table\n",cmd);
for (i=0; i<ncols; i++)
fprintf(stderr,"order[%d] = -> %d\n", i, order[i]);
fprintf(stderr,"\n");
}
*pnumcols = ncols;
}
/***********************************/
void ColorCompress8(trans)
byte *trans;
{
/* modify pic,cpic,epic to reflect new (compressed) colormap */
int i;
byte *p, j;
for (i=pWIDE*pHIGH, p=pic; i; i--, p++) { j = trans[*p]; *p = j; }
if (cpic && cpic != pic) {
for (i=cWIDE*cHIGH, p=cpic; i; i--, p++) { j = trans[*p]; *p = j; }
}
if (epic && epic != cpic) {
for (i=eWIDE*eHIGH, p=epic; i; i--, p++) { j = trans[*p]; *p = j; }
}
}
/***********************************/
void AllocColors()
{
int i;
nfcols = 0;
if (ncols == 0) {
for (i=0; i<numcols; i++) {
rdisp[i] = rMap[i];
gdisp[i] = gMap[i];
bdisp[i] = bMap[i];
}
SetISTR(ISTR_COLOR,"Dithering with 'black' & 'white'.");
SetISTR(ISTR_COLOR2,"");
rwthistime = 0;
RedrawCMap();
return;
}
if (colorMapMode == CM_STDCMAP) {
/* map desired image colors to closest standard colors */
if (picType == PIC24 &&
(theVisual->class == TrueColor || theVisual->class == DirectColor)) {
SetISTR(ISTR_COLOR,"Using %s visual.",
(theVisual->class == TrueColor) ? "TrueColor" : "DirectColor");
SetISTR(ISTR_COLOR2,"");
}
else {
SetISTR(ISTR_COLOR,"Using %s colormap.",
(haveStdCmap == STD_111 ? "2x2x2" :
haveStdCmap == STD_222 ? "4x4x4" :
haveStdCmap == STD_232 ? "4x8x4" :
haveStdCmap == STD_666 ? "6x6x6" : "8x8x4"));
if (ncols>0) SetISTR(ISTR_COLOR2,stdCmapSuccess);
else SetISTR(ISTR_COLOR2,"Dithering with 'black' & 'white'.");
}
rwthistime = 0;
for (i=0; i<numcols; i++) {
int i332;
i332 = ((int)rMap[i]&0xe0) | (((int)gMap[i]&0xe0)>>3) |
(((int)bMap[i]&0xc0)>>6);
cols[i] = stdcols[i332];
rdisp[i] = stdrdisp[i332];
gdisp[i] = stdgdisp[i332];
bdisp[i] = stdbdisp[i332];
}
}
else if (allocMode == AM_READWRITE) allocRWColors();
else allocROColors();
RedrawCMap();
}
/********************************/
void FreeColors()
{
int i;
/* frees all colors allocated by 'AllocColors()'. Doesn't touch stdcmap */
/* Note: might be called multiple times. Must not free colors once it
has done so */
if (LocalCmap) {
XSetWindowAttributes xswa;
xswa.colormap = None;
XChangeWindowAttributes(theDisp,mainW,CWColormap,&xswa);
if (cmapInGam) XChangeWindowAttributes(theDisp,gamW,CWColormap,&xswa);
XFreeColormap(theDisp,LocalCmap);
LocalCmap = 0;
nfcols = 0;
}
else {
for (i=0; i<nfcols; i++)
xvFreeColors(theDisp, theCmap, &freecols[i], 1, 0L);
nfcols = 0;
XFlush(theDisp);
}
}
/***********************************/
static void allocROColors()
{
int i, j, c, unique, p2alloc;
Colormap cmap;
XColor defs[256];
XColor ctab[256];
int failed[256];
int dc;
unique = p2alloc = 0;
rwthistime = 0;
/* FIRST PASS COLOR ALLOCATION:
for each color in the 'desired colormap', try to get it via
xvAllocColor(). If for any reason it fails, mark that pixel
'unallocated' and worry about it later. Repeat. */
/* attempt to allocate first ncols entries in colormap
note: On displays with less than 8 bits per RGB gun, it's quite
possible that different colors in the original picture will be
mapped to the same color on the screen. X does this for you
silently. However, this is not-desirable for this application,
because when I say 'allocate me 32 colors' I want it to allocate
32 different colors, not 32 instances of the same 4 shades... */
for (i=0; i<256; i++) failed[i] = 1;
cmap = (LocalCmap) ? LocalCmap : theCmap;
for (i=0; i<numcols && unique<ncols; i++) {
c = colAllocOrder[i];
if (mono) {
int intens = MONO(rMap[c], gMap[c], bMap[c]);
defs[c].red = defs[c].green = defs[c].blue = intens<<8;
}
else {
defs[c].red = rMap[c]<<8;
defs[c].green = gMap[c]<<8;
defs[c].blue = bMap[c]<<8;
}
defs[c].flags = DoRed | DoGreen | DoBlue;
if (!(colorMapMode==CM_OWNCMAP && cmap==theCmap && CMAPVIS(theVisual))
&& xvAllocColor(theDisp,cmap,&defs[c])) {
unsigned long pixel, *fcptr;
pixel = cols[c] = defs[c].pixel;
rdisp[c] = defs[c].red >> 8;
gdisp[c] = defs[c].green >> 8;
bdisp[c] = defs[c].blue >> 8;
failed[c]= 0;
/* see if the newly allocated color is new and different */
for (j=0, fcptr=freecols; j<nfcols && *fcptr!=pixel; j++,fcptr++);
if (j==nfcols) unique++;
fc2pcol[nfcols] = c;
freecols[nfcols++] = pixel;
}
else {
/* the allocation failed. If we want 'perfect' color, and we haven't
already created our own colormap, we'll want to do so */
if ((colorMapMode == CM_PERFECT || colorMapMode == CM_OWNCMAP)
&& !LocalCmap && CMAPVIS(theVisual)) {
LocalCmap = XCreateColormap(theDisp, vrootW, theVisual, AllocNone);
if (LocalCmap) { /* succeeded, presumably */
/* free all colors that were allocated, and try again with the
new colormap. This is necessary because 'XCopyColormapAndFree()'
has the unpleasant side effect of freeing up the various
colors I need for the control panel, etc. */
for (i=0; i<nfcols; i++)
xvFreeColors(theDisp, theCmap, &freecols[i], 1, 0L);
if (mainW && !useroot) XSetWindowColormap(theDisp,mainW, LocalCmap);
if (mainW && !useroot && cmapInGam)
XSetWindowColormap(theDisp,gamW, LocalCmap);
cmap = LocalCmap;
/* redo ALL allocation requests */
for (i=0; i<256; i++) failed[i] = 1;
nfcols = unique = 0;
i = -1;
}
}
else {
/* either we don't care about perfect color, or we do care, have
allocated our own colormap, and have STILL run out of colors
(possible, even on an 8 bit display), just mark pixel as
unallocated. We'll deal with it later */
failed[c] = 1;
}
}
} /* FIRST PASS */
if (nfcols==numcols) {
if (numcols != unique)
SetISTR(ISTR_COLOR,"Got all %d colors. (%d unique)", numcols,
unique);
else
SetISTR(ISTR_COLOR,"Got all %d colors.", numcols);
SetISTR(ISTR_COLOR2,"");
return;
}
/* SECOND PASS COLOR ALLOCATION:
Allocating 'exact' colors failed. Now try to allocate 'closest'
colors.
Read entire X colormap (or first 256 entries) in from display.
for each unallocated pixel, find the closest color that actually
is in the X colormap. Try to allocate that color (read only).
If that fails, the THIRD PASS will deal with it */
SetISTR(ISTR_COLOR,"Got %d of %d colors. (%d unique)",
nfcols,numcols,unique);
/* read entire colormap (or first 256 entries) into 'ctab' */
dc = (ncells<256) ? ncells : 256;
if (dc>0) { /* only do SECOND PASS if there IS a colormap to read */
for (i=0; i<dc; i++) ctab[i].pixel = (unsigned long) i;
XQueryColors(theDisp, cmap, ctab, dc);
for (i=0; i<numcols && unique<ncols; i++) {
c = colAllocOrder[i];
if (failed[c]) { /* an unallocated pixel */
int d, mdist, close;
int rd, gd, bd, ri, gi, bi;
mdist = 1000000; close = -1;
ri = rMap[c]; gi = gMap[c]; bi = bMap[c];
for (j=0; j<dc; j++) {
rd = ri - (ctab[j].red >>8);
gd = gi - (ctab[j].green>>8);
bd = bi - (ctab[j].blue >>8);
d = rd*rd + gd*gd + bd*bd;
if (d<mdist) { mdist=d; close=j; }
}
if (close<0) FatalError("This Can't Happen! (How reassuring.)");
if (xvAllocColor(theDisp, cmap, &ctab[close])) {
xvbcopy((char *) &ctab[close], (char *) &defs[c], sizeof(XColor));
failed[c]= 0;
cols[c] = ctab[close].pixel;
rdisp[c] = ctab[close].red >> 8;
gdisp[c] = ctab[close].green >> 8;
bdisp[c] = ctab[close].blue >> 8;
fc2pcol[nfcols] = c;
freecols[nfcols++] = cols[c];
p2alloc++;
unique++;
}
}
}
}
/* THIRD PASS COLOR ALLOCATION:
We've alloc'ed all the colors we can. Now, we have to map any
remaining unalloced pixels into either the colors that we DID get */
for (i=0; i<numcols; i++) {
c = colAllocOrder[i];
if (failed[c]) { /* an unallocated pixel */
int d, k, mdist, close;
int rd,gd,bd, ri,gi,bi;
mdist = 1000000; close = -1;
ri = rMap[c]; gi = gMap[c]; bi = bMap[c];
/* search the alloc'd colors */
for (j=0; j<nfcols; j++) {
k = fc2pcol[j];
rd = ri - (defs[k].red >>8);
gd = gi - (defs[k].green>>8);
bd = bi - (defs[k].blue >>8);
d = rd*rd + gd*gd + bd*bd;
if (d<mdist) { mdist=d; close=k; }
}
if (close<0) FatalError("Pass3: Failed to alloc ANY colors!\n");
xvbcopy((char *) &defs[close], (char *) &defs[c], sizeof(XColor));
failed[c]= 0;
cols[c] = defs[c].pixel;
rdisp[c] = defs[c].red >> 8;
gdisp[c] = defs[c].green >> 8;
bdisp[c] = defs[c].blue >> 8;
}
} /* THIRD PASS */
if (p2alloc) SetISTR(ISTR_COLOR2,"Got %d 'close' color%s.",
p2alloc, (p2alloc>1) ? "s" : "");
}
/***********************************/
static void allocRWColors()
{
int i,j,c, failed[256];
Colormap cmap;
XColor defs[256];
rwthistime = 1;
cmap = (LocalCmap) ? LocalCmap : theCmap;
for (i=0; i<numcols; i++) failed[colAllocOrder[i]] = 1;
for (i=0; i<numcols && i<ncols; i++) {
unsigned long pmr[1], pix[1];
c = colAllocOrder[i];
if (cellgroup[c]) {
int n;
/* this color is part of a group. see if its group's
been seen already, and if so, skip this */
for (n=0; n<i && cellgroup[c] != cellgroup[colAllocOrder[n]]; n++);
if (n<i) { /* found one */
cols[c] = cols[colAllocOrder[n]];
rwpc2pc[c] = colAllocOrder[n];
failed[c] = 0;
continue;
}
}
if (!(colorMapMode==CM_OWNCMAP && cmap==theCmap && CMAPVIS(theVisual)) &&
XAllocColorCells(theDisp, cmap, False, pmr, 0, pix, 1)) {
defs[c].pixel = cols[c] = pix[0];
failed[c] = 0;
if (mono) {
int intens = MONO(rMap[c], gMap[c], bMap[c]);
defs[c].red = defs[c].green = defs[c].blue = intens<<8;
}
else {
defs[c].red = rMap[c]<<8;
defs[c].green = gMap[c]<<8;
defs[c].blue = bMap[c]<<8;
}
defs[c].flags = DoRed | DoGreen | DoBlue;
rdisp[c] = rMap[c];
gdisp[c] = gMap[c];
bdisp[c] = bMap[c];
fc2pcol[nfcols] = c;
rwpc2pc[c] = c;
freecols[nfcols++] = pix[0];
}
else {
if ((colorMapMode == CM_PERFECT || colorMapMode == CM_OWNCMAP)
&& !LocalCmap && CMAPVIS(theVisual)) {
LocalCmap = XCreateColormap(theDisp, vrootW, theVisual, AllocNone);
/* free all colors that were allocated, and try again with the
new colormap. This is necessary because 'XCopyColormapAndFree()'
has the unpleasant side effect of freeing up the various
colors I need for the control panel, etc. */
for (i=0; i<nfcols; i++)
xvFreeColors(theDisp, theCmap, &freecols[i], 1, 0L);
if (mainW && !useroot) XSetWindowColormap(theDisp,mainW, LocalCmap);
if (mainW && !useroot && cmapInGam)
XSetWindowColormap(theDisp,gamW, LocalCmap);
cmap = LocalCmap;
/* redo ALL allocation requests */
for (i=0; i<numcols; i++) failed[colAllocOrder[i]] = 1;
nfcols = 0;
i = -1;
}
else failed[c] = 1;
}
} /* for (i=0; ... */
if (nfcols==numcols) {
SetISTR(ISTR_COLOR,"Got all %d colors.", numcols);
SetISTR(ISTR_COLOR2,"");
}
else {
/* Failed to allocate all colors in picture. Map remaining desired
colors into closest allocated desired colors */
if (nfcols==0 && !LocalCmap) {
char tstr[128], *tmp,
*foo = "No r/w cells available. Using r/o color.";
tmp = GetISTR(ISTR_WARNING);
if (strlen(tmp) > (size_t) 0) sprintf(tstr, "%s %s", tmp, foo);
else sprintf(tstr, "%s", foo);
SetISTR(ISTR_WARNING,tstr);
allocROColors();
return;
}
SetISTR(ISTR_COLOR,"Got %d of %d colors.", nfcols,numcols);
for (i=0; i<numcols; i++) {
c = colAllocOrder[i];
if (failed[c]) { /* an unallocated pixel */
int k, d, mdist, close;
int rd, gd, bd, ri, gi, bi;
mdist = 1000000; close = -1;
ri = rMap[c]; gi = gMap[c]; bi = bMap[c];
for (j=0; j<nfcols; j++) {
k = fc2pcol[j];
rd = ri - (defs[k].red >>8);
gd = gi - (defs[k].green>>8);
bd = bi - (defs[k].blue >>8);
d = rd*rd + gd*gd + bd*bd;
if (d<mdist) { mdist=d; close=k; }
}
if (close<0) FatalError("This Can't Happen! (How reassuring.)");
xvbcopy((char *) &defs[close], (char *) &defs[c], sizeof(XColor));
failed[c]= 0;
cols[c] = defs[c].pixel;
rdisp[c] = defs[c].red >> 8;
gdisp[c] = defs[c].green >> 8;
bdisp[c] = defs[c].blue >> 8;
rwpc2pc[c] = close;
}
}
}
/* load up the allocated colorcells */
for (i=0; i<nfcols; i++) {
j = fc2pcol[i];
defs[j].pixel = freecols[i];
if (mono) {
int intens = MONO(rMap[j], gMap[j], bMap[j]);
defs[j].red = defs[j].green = defs[j].blue = intens<<8;
}
else {
defs[j].red = rMap[j]<<8;
defs[j].green = gMap[j]<<8;
defs[j].blue = bMap[j]<<8;
}
defs[j].flags = DoRed | DoGreen | DoBlue;
XStoreColor(theDisp, cmap, &defs[j]);
}
}
/*******************************************************/
/* 24/32-bit TrueColor display color 'allocation' code */
/*******************************************************/
static int highbit(ul)
unsigned long ul;
{
/* returns position of highest set bit in 'ul' as an integer (0-31),
or -1 if none */
int i; unsigned long hb;
hb = 0x8000; hb = (hb<<16); /* hb = 0x80000000UL */
for (i=31; ((ul & hb) == 0) && i>=0; i--, ul<<=1);
return i;
}
Status xvAllocColor(dp, cm, cdef)
Display *dp;
Colormap cm;
XColor *cdef;
{
if (theVisual->class == TrueColor || theVisual->class == DirectColor) {
unsigned long r, g, b, rmask, gmask, bmask, origr, origg, origb;
int rshift, gshift, bshift;
/* shift r,g,b so that high bit of 16-bit color specification is
* aligned with high bit of r,g,b-mask in visual,
* AND each component with its mask,
* and OR the three components together
*/
origr = r = cdef->red; origg = g = cdef->green; origb = b = cdef->blue;
if (theVisual->class == DirectColor) {
/* r,g,b are 16-bit values */
int maplen = theVisual->map_entries;
if (maplen>256) maplen = 256;
rshift = 15 - highbit((unsigned long) (maplen-1));
r = (u_long) directConv[(r>>rshift) & 0xff];
g = (u_long) directConv[(g>>rshift) & 0xff];
b = (u_long) directConv[(b>>rshift) & 0xff];
/* shift the bits back up */
r = r << rshift;
g = g << rshift;
b = b << rshift;
}
rmask = theVisual->red_mask;
gmask = theVisual->green_mask;
bmask = theVisual->blue_mask;
rshift = 15 - highbit(rmask);
gshift = 15 - highbit(gmask);
bshift = 15 - highbit(bmask);
/* shift the bits around */
if (rshift<0) r = r << (-rshift);
else r = r >> rshift;
if (gshift<0) g = g << (-gshift);
else g = g >> gshift;
if (bshift<0) b = b << (-bshift);
else b = b >> bshift;
r = r & rmask;
g = g & gmask;
b = b & bmask;
cdef->pixel = r | g | b;
/* put 'exact' colors into red,green,blue fields */
/* shift the bits BACK to where they were, now that they've been masked */
if (rshift<0) r = r >> (-rshift);
else r = r << rshift;
if (gshift<0) g = g >> (-gshift);
else g = g << gshift;
if (bshift<0) b = b >> (-bshift);
else b = b << bshift;
cdef->red = r; cdef->green = g; cdef->blue = b;
if (DEBUG > 1) {
fprintf(stderr,
"xvAlloc: col=%04lx,%04lx,%04lx -> exact=%04x,%04x,%04x\n",
origr, origg, origb, cdef->red, cdef->green, cdef->blue);
fprintf(stderr,
" mask=%04lx,%04lx,%04lx pix=%08lx\n",
rmask, gmask, bmask, cdef->pixel);
}
return 1;
}
else {
return (XAllocColor(dp,cm,cdef));
}
}
void xvFreeColors(dp, cm, pixels, npixels, planes)
Display *dp;
Colormap cm;
unsigned long *pixels;
int npixels;
unsigned long planes;
{
if (theVisual->class != TrueColor && theVisual->class != DirectColor)
XFreeColors(dp, cm, pixels, npixels, planes);
}
/********************************/
void ApplyEditColor(regroup)
int regroup;
{
int i, j;
/* if regroup is set, we *must* do a full realloc, as the cols[] array
isn't correct anymore. (cell groupings changed) */
ApplyECctrls(); /* set {r,g,b}cmap[editColor] based on dial settings */
Gammify1(editColor);
if (curgroup) { /* do the same to all its friends */
for (i=0; i<numcols; i++) {
if (cellgroup[i] == curgroup) {
rcmap[i] = rcmap[editColor];
gcmap[i] = gcmap[editColor];
bcmap[i] = bcmap[editColor];
rMap[i] = rMap[editColor];
gMap[i] = gMap[editColor];
bMap[i] = bMap[editColor];
}
}
}
/* do something clever if we're using R/W color and this colorcell isn't
shared */
if (!regroup && allocMode==AM_READWRITE && rwthistime) {
/* let's try to be clever */
/* determine if the editColor cell is unique, or shared (among
non-group members, that is) */
for (i=j=0; i<numcols; i++)
if (rwpc2pc[i] == rwpc2pc[editColor]) j++;
/* if this is a group, subtract off the non-this-one pixels from group */
if (curgroup) {
for (i=0; i<numcols; i++) {
if (cellgroup[i] == curgroup && i!=editColor) j--;
}
}
if (j==1) { /* we can be way cool about this one */
XColor ctab;
ctab.pixel = cols[editColor];
if (mono) {
int intens = MONO(rMap[editColor], gMap[editColor], bMap[editColor]);
ctab.red = ctab.green = ctab.blue = intens<<8;
}
else {
ctab.red = rMap[editColor]<<8;
ctab.green = gMap[editColor]<<8;
ctab.blue = bMap[editColor]<<8;
}
ctab.flags = DoRed | DoGreen | DoBlue;
XStoreColor(theDisp, LocalCmap ? LocalCmap : theCmap, &ctab);
rdisp[editColor] = rMap[editColor];
gdisp[editColor] = gMap[editColor];
bdisp[editColor] = bMap[editColor];
return;
}
}
/* either we aren't using R/W color, or we are, but this particular color
cell isn't mapped a unique X colorcell. Either way... */
FreeColors();
putECfirst(); /* make certain this one gets alloc'd */
AllocColors();
DrawEpic();
SetCursors(-1);
}
/**************************************/
static void putECfirst()
{
/* called after all colors have been freed up, but before reallocating.
moves color #editColor to first in 'colAllocOrder' list, so that it
is most-likely to get its desired color */
int i;
/* find it in the list */
for (i=0; i<numcols; i++) {
if (editColor == colAllocOrder[i]) break;
}
if (i==numcols || i==0) { /* didn't find it, or it's first already */
return;
}
/* shift 0..i-1 down one position */
xvbcopy((char *) colAllocOrder, (char *) colAllocOrder+1,
i * sizeof(colAllocOrder[0]));
colAllocOrder[0] = editColor;
}
#define CDIST(x,y,z) ((x)*(x) + (y)*(y) + (z)*(z))
/***************************************************************/
int MakeStdCmaps()
{
/* produces many things:
* stdr,stdg,stdb[256] - a 256-entry, desired 3/3/2 colormap
* stdcols[256] - 256-entry, maps 3/3/2 colors into X pixel values
* stdrdisp,stdgdisp, stdbdisp[256]
* - for a given 3/3/2 color, gives the rgb values
* actually displayed. Since we're not going to
* successfully allocate all 256 colors (generally),
* several 3/3/2 colors may be mapped into the
* same X pixel (and hence, same rgb value)
* stdfreecols[256] - list of colors to free on exit
* stdnfcols - # of colors to free
*
* possibly modifies browR, browG, browB, and browcols arrays
* (if !browPerfect)
*/
/* returns '1' if the colors were reallocated, '0' otherwise */
/*
* if we're on a TrueColor/DirectColor visual, it will attempt to alloc
* 256 colors
* otherwise, if colorMapMode == CM_STDCMAP, it will attempt to alloc
* 6*6*6 = 216 colors, or 4*4*4 = 64, or 2*2*2 = 8 colors, depending
* on 'ncols' variable
*/
/* note:
* if (ncols==0) (ie, we're either on, or emulating a b/w display),
* build std*[], std*disp[], colormaps, but don't actually
* allocate any colors.
*/
int i,r,g,b, desMode, screwed;
XColor def;
byte rmap[256],gmap[256],bmap[256],order[256];
unsigned long descols[256];
int des2got[256], failed[256];
int maplen, exactCnt, nearCnt;
/* generate stdr,stdg,stdb cmap. Same in all cases */
for (r=0, i=0; r<8; r++)
for (g=0; g<8; g++)
for (b=0; b<4; b++,i++) {
stdr[i] = (r*255)/7;
stdg[i] = (g*255)/7;
stdb[i] = (b*255)/3;
}
/* determine what size cmap we should build */
if (theVisual->class == TrueColor ||
theVisual->class == DirectColor) desMode = STD_332;
else if (colorMapMode == CM_STDCMAP) desMode = STD_232;
else desMode = STD_222;
/* make sure that we're not exceeding 'ncols' (ignore ncols==0) */
if (ncols > 0) {
if (ncols < 64) desMode = STD_111;
else if (ncols < 128) desMode = STD_222;
else if (ncols < 256 && desMode == STD_332) desMode = STD_232;
}
if (DEBUG) fprintf(stderr,"MakeStdCmaps: have=%d, des=%d, ncols=%d\n",
haveStdCmap, desMode, ncols);
if (haveStdCmap != STD_NONE && haveStdCmap == desMode) return 0;
freeStdCmaps();
/* init some stuff */
screwed = 0;
stdnfcols = 0;
for (i=0; i<256; i++) stdcols[i] = stdfreecols[i] = 0;
for (i=0; i<256; i++) des2got[i] = i;
exactCnt = nearCnt = 0;