static void
mkclrmap( /* make our color map */
int nc
)
{
register int i;
if ((samplefac ? neu_init(xmax*ymax) : new_histo(xmax*ymax)) == -1)
goto memerr;
for (i = 0; i < ymax; i++) {
getrow(i);
if (samplefac)
neu_colrs(scanln, xmax);
else
cnt_colrs(scanln, xmax);
}
if (samplefac)
neu_clrtab(nc);
else
new_clrtab(nc);
for (i = 0; i < nc; i++) {
rmap[i] = clrtab[i][RED];
gmap[i] = clrtab[i][GRN];
bmap[i] = clrtab[i][BLU];
}
if (dither && (pixscan = (uby8 *)malloc(xmax)) == NULL)
goto memerr;
return;
memerr:
fprintf(stderr, "%s: out of memory\n", progname);
exit(1);
}
void remap_imagecolors(void)
{
int i;
/* if monochrome, return */
if (tool_cells <= 2 || appres.monochrome)
return;
npixels = 0;
/* first see if there are enough colorcells for all image colors */
usenet = False;
/* see if the total number of colors will fit without using the neural net */
ncolors = count_colors();
if (ncolors == 0)
return;
put_msg(REMAP_MSG);
set_temp_cursor(wait_cursor);
app_flush();
if (ncolors > appres.max_image_colors) {
if (appres.DEBUG)
fprintf(stderr,"More colors (%d) than allowed (%d), using neural net\n",
ncolors,appres.max_image_colors);
ncolors = appres.max_image_colors;
usenet = True;
}
/* if this is the first image, allocate the number of colorcells we need */
if (num_oldcolors != ncolors) {
if (num_oldcolors != -1) {
unsigned long pixels[MAX_USR_COLS];
for (i=0; i<num_oldcolors; i++)
pixels[i] = image_cells[i].pixel;
if (tool_vclass == PseudoColor)
XFreeColors(tool_d, tool_cm, pixels, num_oldcolors, 0);
}
alloc_imagecolors(ncolors);
/* hmm, we couldn't get that number of colors anyway; use the net, Luke */
if (ncolors > avail_image_cols) {
usenet = True;
if (appres.DEBUG)
fprintf(stderr,"More colors (%d) than available (%d), using neural net\n",
ncolors,avail_image_cols);
}
num_oldcolors = avail_image_cols;
if (avail_image_cols < 2 && ncolors >= 2) {
file_msg("Cannot allocate even 2 colors for pictures");
reset_cursor();
num_oldcolors = -1;
reset_cursor();
put_msg(REMAP_MSG2);
app_flush();
return;
}
}
reset_cursor();
if (usenet) {
int stat;
int mult = 1;
/* check if user pressed cancel button (in file preview) */
if (check_cancel())
return;
/* count total number of pixels in all the pictures */
npixels = count_pixels();
/* check if user pressed cancel button */
if (check_cancel())
return;
/* initialize the neural network */
/* -1 means can't alloc memory, -2 or more means must have that many times
as many pixels */
set_temp_cursor(wait_cursor);
if ((stat=neu_init(npixels)) <= -2) {
mult = -stat;
npixels *= mult;
/* try again with more pixels */
stat = neu_init2(npixels);
}
if (stat == -1) {
/* couldn't alloc memory for network */
fprintf(stderr,"Can't alloc memory for neural network\n");
reset_cursor();
put_msg(REMAP_MSG2);
app_flush();
return;
}
/* now add all pixels to the samples */
for (i=0; i<mult; i++)
add_all_pixels();
/* make a new colortable with the optimal colors */
avail_image_cols = neu_clrtab(avail_image_cols);
/* now change the color cells with the new colors */
/* clrtab[][] is the colormap produced by neu_clrtab */
for (i=0; i<avail_image_cols; i++) {
image_cells[i].red = (unsigned short) clrtab[i][N_RED] << 8;
image_cells[i].green = (unsigned short) clrtab[i][N_GRN] << 8;
image_cells[i].blue = (unsigned short) clrtab[i][N_BLU] << 8;
}
YStoreColors(tool_cm, image_cells, avail_image_cols);
reset_cursor();
/* check if user pressed cancel button */
if (check_cancel())
return;
/* get the new, mapped indices for the image colormap */
remap_image_colormap();
} else {
/*
* Extract the RGB values from the image's colormap and allocate
* the appropriate X colormap entries.
*/
scol = 0; /* global color counter */
set_temp_cursor(wait_cursor);
extract_cmap();
for (i=0; i<scol; i++) {
image_cells[i].flags = DoRed|DoGreen|DoBlue;
}
YStoreColors(tool_cm, image_cells, scol);
scol = 0; /* global color counter */
readjust_cmap();
if (appres.DEBUG)
fprintf(stderr,"Able to use %d colors without neural net\n",scol);
reset_cursor();
}
put_msg(REMAP_MSG2);
app_flush();
}
