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/*
* This file is part of XForms.
*
* XForms is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1, or
* (at your option) any later version.
*
* XForms is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with XForms. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* \file xbmtops.c
*
* This file is part of XForms package
* Copyright (c) 1997-2000 by T.C. Zhao
* All rights reserved.
*
* Turn an xbm file into PostScript
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "include/forms.h"
#include "fd2ps.h"
#include <ctype.h>
#include <stdlib.h>
static int
gethexint(FILE * fp)
{
char buf[20], *p;
int c;
while ((c = getc(fp)) == ',' || isspace(c))
/* empty */ ;
if (c == EOF)
return -1;
for (p = buf; c != EOF && c != ',' && !isspace(c); c = getc(fp))
*p++ = c;
*p = '\0';
return strtol(buf, 0, 16);
}
#define MAXH 500
static int bit_w, bit_h;
static char *bit_buf[MAXH];
static int
read_xbm(const char *f)
{
char buf[256];
int nosize, c, i, j, ct, err;
FILE *fp;
char *bits;
if (!(fp = fopen(f, "r")))
{
fprintf(stderr, "Can't open %s\n", f);
return -1;
}
bit_w = bit_h = 0;
for (nosize = 1; nosize && fgets(buf, sizeof(buf) - 1, fp);)
{
if (sscanf(buf, "#define %*s %d", &c) == 1)
{
if (strstr(buf, "_width"))
bit_w = c;
else if (strstr(buf, "_height"))
bit_h = c;
nosize = bit_w < 1 || bit_h < 1;
}
}
if (bit_h > MAXH)
{
fprintf(stderr, "bitmap too large. truncated\n");
bit_h = MAXH;
}
for (i = 0; i < bit_h; i++)
{
if (bit_buf[i])
free(bit_buf[i]);
bit_buf[i] = calloc(bit_w, sizeof(*bit_buf[i]));
}
/* skip until getting a brace */
for (; (c = getc(fp)) != EOF && c != '{';) /* } VI */
/* empty */ ;
if (feof(fp) || ferror(fp))
{
fprintf(stderr, "error reading %s\n", f);
bit_w = 0;
return -1;
}
/* read the data */
for (j = err = c = 0; j < bit_h && !err; j++)
{
bits = bit_buf[bit_h - 1 - j];
for (i = ct = 0; i < bit_w && !err; i++, ct = (ct + 1) & 7)
{
if (ct == 0)
err = (c = gethexint(fp)) < 0;
*bits++ = (c & 1);
c = c >> 1;
}
}
if (err)
fprintf(stderr, "Junk in bitmap hex stream\n");
return (j > bit_h / 2) ? 0 : -1;
}
void
draw_bitmap(const char *f, float x, float y, float w, float h,
long fcol, long bcol)
{
int i, j, r, g, b;
char *bits;
float xx, yy;
fd2psCMAP cmap[2];
short *pixels, *pix;
read_xbm(f);
if (bit_w < 1)
return;
xx = x + (w - bit_w) / 2;
yy = y + (h - bit_h) / 2;
/* in xforms, bitmap is really an image with two colors, not *
neccessarily black and white */
fl_query_imap(bcol, &r, &g, &b);
cmap[0].red = r;
cmap[0].green = g;
cmap[0].blue = b;
fl_query_imap(fcol, &r, &g, &b);
cmap[1].red = r;
cmap[1].green = g;
cmap[1].blue = b;
pix = pixels = malloc(sizeof(*pixels) * bit_w * bit_h);
for (j = 0; j < bit_h; j++)
{
bits = bit_buf[bit_h - 1 - j];
for (i = 0; i < bit_w; i++, bits++, pix++)
*pix = (*bits != 0);
}
ps_verbatim("\n%% Start of XBM file %s %%{\n", f);
ps_output("gsave ");
ps_output("%.1f %.1f translate\n", xx, yy);
if (flps->colorps)
image2colorps(pixels, bit_w, bit_h, cmap, 2, 0);
else
image2grayps(pixels, bit_w, bit_h, cmap, 2, 0);
ps_verbatim("\ngrestore%%}\n");
free(pixels);
return;
}
/*
* Local variables:
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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