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/* _____ ___ _ _ _____
** __ _| ___/ _ \| \ | |_ _|
** / _` | |_ | | | | \| | | |
** | (_| | _|| |_| | |\ | | |
** \__, |_| \___/|_| \_| |_|
** |___/
**
** gFONT -- Create GIF image rendered with TeX-available Font
**
** The gFONT program creates a GIF image for a given ASCII string
** by the use of an arbitrary TeX-available font (Postscript or
** METAFONT). The used font is converted from TeX's PK format to
** gFONT's own GdF format (Gd Font) and rendered into the
** resulting GIF image by the use of its own enhanced Gd library.
** The result is intended to be included into HTML pages with an
** IMG tag.
**
** ======================================================================
**
** Copyright (c) 1997 Ralf S. Engelschall, All rights reserved.
**
** This program is free software; it may be redistributed and/or modified
** only under the terms of either the Artistic License or the GNU General
** Public License, which may be found in the ePerl source distribution.
** Look at the files ARTISTIC and COPYING or run ``eperl -l'' to receive
** a built-in copy of both license files.
**
** This program 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 either the
** Artistic License or the GNU General Public License for more details.
**
** ======================================================================
**
** gfont_main.c -- main program
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include "gfont_gd.h"
#include "gfont_gdfontl.h"
#include "gfont_getopt.h"
#include "config_sc.h"
int fVerbose = 0;
void Verbose(char *str, ...)
{
va_list ap;
char buf[1024];
va_start(ap, str);
if (fVerbose) {
vsprintf(buf, str, ap);
fprintf(stderr, "%s", buf);
}
va_end(ap);
return;
}
int hex2int(char c)
{
if (c >= 'a' && c <= 'f')
return (c - 'a' + 10);
else if (c >= 'A' && c <= 'F')
return (c - 'A' + 10);
else
return (c - '0');
}
void hextriple2gdcolor(char *str, int *r, int *g, int *b)
{
*r = (hex2int(str[0]) * 16 + hex2int(str[1]));
*g = (hex2int(str[2]) * 16 + hex2int(str[3]));
*b = (hex2int(str[4]) * 16 + hex2int(str[5]));
}
#define ALIGN_L 0
#define ALIGN_C 1
#define ALIGN_R 2
#define ALIGN_T 3
#define ALIGN_M 4
#define ALIGN_B 5
int parsesizespec(char *str, int *xrel, int *xsize, int *xalign,
int *yrel, int *ysize, int *yalign)
{
char spec[128];
char *xspec;
char *yspec;
char *cp;
strcpy(spec, str);
if ((cp = index(spec, 'x')) == NULL)
return 1;
*cp++ = '\0';
xspec = spec;
yspec = cp;
*xrel = 0;
if (*xspec == '+') {
*xrel = 1;
xspec++;
}
*xalign = ALIGN_L;
if (*(xspec+(strlen(xspec)-1)) == 'L') {
*xalign = ALIGN_L;
*(xspec+(strlen(xspec)-1)) = '\0';
}
else if (*(xspec+(strlen(xspec)-1)) == 'C') {
*xalign = ALIGN_C;
*(xspec+(strlen(xspec)-1)) = '\0';
}
else if (*(xspec+(strlen(xspec)-1)) == 'R') {
*xalign = ALIGN_R;
*(xspec+(strlen(xspec)-1)) = '\0';
}
*xsize = atoi(xspec);
if (*xsize < 0) {
*xsize = 0;
*xrel = 1;
}
*yrel = 0;
if (*yspec == '+') {
*yrel = 1;
yspec++;
}
*yalign = ALIGN_T;
if (*(yspec+(strlen(yspec)-1)) == 'T') {
*yalign = ALIGN_T;
*(yspec+(strlen(yspec)-1)) = '\0';
}
else if (*(yspec+(strlen(yspec)-1)) == 'M') {
*yalign = ALIGN_M;
*(yspec+(strlen(yspec)-1)) = '\0';
}
else if (*(yspec+(strlen(yspec)-1)) == 'B') {
*yalign = ALIGN_B;
*(yspec+(strlen(yspec)-1)) = '\0';
}
*ysize = atoi(yspec);
if (*ysize < 0) {
*ysize = 0;
*yrel = 1;
}
return 0;
}
int gdImageAntiAlias(gdImage *ip,
int x0, int y0, int x1, int y1,
int antialias, int bgcolor)
{
int x, y;
int p;
int p_u, p_d, p_l, p_r;
int r_u, r_d, r_l, r_r;
int g_u, g_d, g_l, g_r;
int b_u, b_d, b_l, b_r;
int r_q, g_q, b_q;
int q;
if (!gdImageBoundsSafe(ip, x0, y0) || !gdImageBoundsSafe(ip, x1, y1))
return 1;
for (x = x0+1; x <= x1-1; x++) {
for (y = y0+1; y <= y1-1; y++) {
p = gdImageGetPixel(ip, x, y);
if (p != bgcolor)
continue;
p_l = gdImageGetPixel(ip, x-1, y);
r_l = ip->red[p_l]; g_l = ip->blue[p_l]; b_l = ip->blue[p_l];
p_u = gdImageGetPixel(ip, x, y-1);
r_u = ip->red[p_u]; g_u = ip->blue[p_u]; b_u = ip->blue[p_u];
p_r = gdImageGetPixel(ip, x+1, y);
r_r = ip->red[p_r]; g_r = ip->blue[p_r]; b_r = ip->blue[p_r];
p_d = gdImageGetPixel(ip, x, y+1);
r_d = ip->red[p_d]; g_d = ip->blue[p_d]; b_d = ip->blue[p_d];
r_q = (unsigned char)((r_l + r_u + r_r + r_d) / 4);
g_q = (unsigned char)((g_l + g_u + g_r + g_d) / 4);
b_q = (unsigned char)((b_l + b_u + b_r + b_d) / 4);
q = gdImageColorClosest(ip, r_q+64, g_q+64, b_q+64);
gdImageSetPixel(ip, x, y, q);
}
}
return 0;
}
extern char gFONT_Hello[];
void give_version(void)
{
fprintf(stderr, "%s\n", gFONT_Hello);
fprintf(stdout, "\n");
fprintf(stdout, "Copyright (c) 1997 Ralf S. Engelschall, All rights reserved.\n");
fprintf(stdout, "\n");
fprintf(stdout, "This program is distributed in the hope that it will be useful,\n");
fprintf(stdout, "but WITHOUT ANY WARRANTY; without even the implied warranty of\n");
fprintf(stdout, "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n");
fprintf(stdout, "the GNU General Public License for more details.\n");
fprintf(stdout, "\n");
}
void give_usage(char *name)
{
fprintf(stderr, "Usage: %s [options] string\n", name);
fprintf(stderr, "\n");
fprintf(stderr, "Rendering Parameters:\n");
fprintf(stderr, " -b, --background=RRGGBB set background color (default: `ffffff')\n");
fprintf(stderr, " -f, --foreground=RRGGBB set foreground color (default: `000000')\n");
fprintf(stderr, " -F, --fontname=NAME set specific font (default `CMBoldface-V')\n");
fprintf(stderr, " -G, --gdf-path=DIR add DIR to the path where GdF files are searched\n");
fprintf(stderr, "\n");
fprintf(stderr, "Output Parameters:\n");
fprintf(stderr, " -a, --anti-alias=N apply anti-alias filter with N colors\n");
fprintf(stderr, " -c, --crop crop image to real edges after rendering\n");
fprintf(stderr, " -r, --resize=SPEC resize the image to a particular result size\n");
fprintf(stderr, " -i, --interlace enable GIF Interlacing feature\n");
fprintf(stderr, " -o, --output-file=FILE set the output file (default `out.gif')\n");
fprintf(stderr, "\n");
fprintf(stderr, "Giving Feedback:\n");
fprintf(stderr, " -v, --verbose enable verbose processing\n");
fprintf(stderr, " -V, --version display version string\n");
fprintf(stderr, " -h, --help display this page\n");
fprintf(stderr, "\n");
}
struct option options[] = {
{ "background", 1, NULL, 'b' },
{ "foreground", 1, NULL, 'f' },
{ "fontname", 1, NULL, 'F' },
{ "gdf-path", 1, NULL, 'G' },
{ "anti-alias", 0, NULL, 'a' },
{ "crop", 0, NULL, 'c' },
{ "resize", 0, NULL, 'r' },
{ "output-file", 1, NULL, 'o' },
{ "verbose", 0, NULL, 'v' },
{ "version", 0, NULL, 'V' },
{ "help", 0, NULL, 'h' }
};
int
main(int argc, char *argv[])
{
FILE *fp;
gdImage *ip;
gdImage *ipn;
int cbg, cfg;
gdFontPtr gdfp;
int x, y;
int i, h, w;
int nX, nY, nW, nH;
char buffer[20];
char ca[1024];
char cmd[1024];
int antialias = 0;
int fCrop = 0;
int fResize = 0;
int fInterlace = 0;
char *outputfile = "out.gif";
int bg_r, bg_g, bg_b;
int fg_r, fg_g, fg_b;
char c;
char *string;
char *font = "CMBoldface-V";
int r, g, b;
int d_r, d_g, d_b;
char *gdfpath = FONTPATH;
int bgnondefault = 0;
char *cp;
int cont;
int ss_xrel, ss_xsize, ss_xalign;
int ss_yrel, ss_ysize, ss_yalign;
hextriple2gdcolor("ffffff", &bg_r, &bg_g, &bg_b);
hextriple2gdcolor("000000", &fg_r, &fg_g, &fg_b);
/* parse the option arguments */
opterr = 0;
while ((c = getopt_long(argc, argv, ":b:f:a:F:G:cir:o:vVh", options, NULL)) != -1) {
if (optarg == NULL)
optarg = "(null)";
switch (c) {
case 'b':
hextriple2gdcolor(optarg, &bg_r, &bg_g, &bg_b);
bgnondefault = 1;
break;
case 'f':
hextriple2gdcolor(optarg, &fg_r, &fg_g, &fg_b);
break;
case 'a':
antialias = atoi(optarg);
break;
case 'F':
font = strdup(optarg);
break;
case 'G':
sprintf(ca, "%s:%s", optarg, gdfpath);
gdfpath = strdup(ca);
break;
case 'c':
fCrop = 1;
break;
case 'i':
fInterlace = 1;
break;
case 'r':
if (parsesizespec(optarg, &ss_xrel, &ss_xsize, &ss_xalign, &ss_yrel, &ss_ysize, &ss_yalign)) {
fprintf(stderr, "** gFONT::Error: bad size spec: `%s'\n", optarg);
exit(1);
}
fResize = 1;
break;
case 'o':
outputfile = strdup(optarg);
break;
case 'v':
fVerbose = 1;
break;
case 'V':
give_version();
exit(0);
break;
case 'h':
give_usage(argv[0]);
exit(0);
break;
default:
fprintf(stderr, "gFONT: invalid option `%c'\n", optopt);
fprintf(stderr, "Try `%s --help' for more information.\n", argv[0]);
exit(1);
}
}
/* determine source filename and runtime mode */
if (optind != argc-1) {
fprintf(stderr, "gFONT: wrong number of arguments\n");
fprintf(stderr, "Try `%s --help' for more information.\n", argv[0]);
exit(1);
}
string = argv[optind];
Verbose("Loading font: ");
if ((cp = getenv("GDFPATH")) != NULL) {
sprintf(ca, "%s:%s", gdfpath, cp);
gdfpath = strdup(ca);
}
gdFontPathSet(gdfpath);
if ((gdfp = gdFontLoad(font)) == NULL) {
sprintf(cmd, "%s/exec/gfont_mkgdf %s", libdir, font);
fprintf(stderr, "Running `%s'\n", cmd);
system(cmd);
if ((gdfp = gdFontLoad(font)) == NULL) {
fprintf(stderr, "Still cannot load font '%s'\n", font);
exit(1);
}
}
Verbose("%s (%dx%d)\n", gdfp->name, gdfp->w, gdfp->h);
Verbose("Calculating image size: ");
w = gdImageStringWidth(gdfp, string) + 2;
h = gdfp->h + 2;
Verbose("%d x %d\n", w, h);
Verbose("Allocating image: ");
ip = gdImageCreate(w, h);
cbg = gdImageColorAllocate(ip, bg_r, bg_g, bg_b);
cfg = gdImageColorAllocate(ip, fg_r, fg_g, fg_b);
if (fInterlace)
gdImageInterlace(ip, 1);
if (!bgnondefault)
gdImageColorTransparent(ip, cbg);
Verbose("Done\n");
Verbose("Drawing image: ");
gdImageString(ip, gdfp, 1, 1, string, cfg);
Verbose("Done\n");
if (antialias > 0) {
Verbose("Anti-Aliasing image: ");
r = (bg_r > fg_r ? fg_r : bg_r);
g = (bg_g > fg_g ? fg_g : bg_g);
b = (bg_b > fg_b ? fg_b : bg_b);
d_r = abs(bg_r - fg_r) / (antialias+1);
d_g = abs(bg_g - fg_g) / (antialias+1);
d_b = abs(bg_b - fg_b) / (antialias+1);
for (i = 0; i < antialias; i++) {
r += d_r;
g += d_g;
b += d_b;
Verbose("r=%d,g=%d,b=%d\n", r+20, g+20, b+20);
gdImageColorAllocate(ip, r, g, b);
}
gdImageAntiAlias(ip, 1, 1, w-1, h-1, antialias, cbg);
gdImageAntiAlias(ip, 1, 1, w-1, h-1, antialias, cbg);
Verbose("Done\n");
}
if (fCrop) {
Verbose("Cropping image to: ");
nX = 0;
nW = w;
cont = 1;
for (y = 0; y < gdImageSY(ip) && cont; y++)
for (x = 0; x < gdImageSX(ip) && cont; x++)
if (gdImageGetPixel(ip, x, y) != cbg)
cont = 0;
y = (y > 0 ? y-1 : y);
nY = y;
nH = gdImageSY(ip) - y;
cont = 1;
for (y = gdImageSY(ip) - 1; y >= nY && cont; y--)
for (x = 0; x < gdImageSX(ip) && cont; x++)
if (gdImageGetPixel(ip, x, y) != cbg)
cont = 0;
y = (y < gdImageSY(ip) ? y+1 : y);
nH = nH - ((gdImageSY(ip) - 1) - y);
Verbose("%d x %d, origin: (%d,%d)\n", nW, nH, nX, nY);
Verbose("Allocating new image: ");
ipn = gdImageCreate(nW, nH);
cbg = gdImageColorAllocate(ipn, bg_r, bg_g, bg_b);
cfg = gdImageColorAllocate(ipn, fg_r, fg_g, fg_b);
if (fInterlace)
gdImageInterlace(ipn, 1);
if (!bgnondefault)
gdImageColorTransparent(ipn, cbg);
Verbose("Done\n");
Verbose("Copying image: ");
gdImageCopy(ipn, ip, 0, 0, nX, nY, nW, nH);
Verbose("Done\n");
Verbose("Freeing old image: ");
gdImageDestroy(ip);
ip = ipn;
Verbose("Done\n");
}
if (fResize) {
Verbose("Adjusting image size: ");
Verbose("x=%s%d y=%s%d, xalign=%d, yalign=%d\n",
(ss_xrel ? "+" : ""), ss_xsize,
(ss_yrel ? "+" : ""), ss_ysize,
ss_xalign,
ss_yalign
);
if (ss_xrel)
nW = gdImageSX(ip)+ss_xsize;
else
nW = ss_xsize;
if (ss_yrel)
nH = gdImageSY(ip)+ss_ysize;
else
nH = ss_ysize;
if (ss_xalign == ALIGN_L)
nX = 0;
else if (ss_xalign == ALIGN_C)
nX = ((int)((nW/2))-1) - (int)(gdImageSX(ip)/2);
else if (ss_xalign == ALIGN_R)
nX = nW-gdImageSX(ip);
if (ss_yalign == ALIGN_T)
nY = 0;
else if (ss_yalign == ALIGN_M)
nY = ((int)((nH/2))-1) - (int)(gdImageSY(ip)/2);
else if (ss_yalign == ALIGN_B)
nY = nH-gdImageSY(ip);
Verbose("Adjusting parameters: %d x %d, origin: (%d,%d)\n", nW, nH, nX, nY);
if (nW < gdImageSX(ip) || nH < gdImageSY(ip)) {
fprintf(stderr, "** gFONT:Error: new image size too small\n");
exit(1);
}
Verbose("Allocating new image: ");
ipn = gdImageCreate(nW, nH);
cbg = gdImageColorAllocate(ipn, bg_r, bg_g, bg_b);
cfg = gdImageColorAllocate(ipn, fg_r, fg_g, fg_b);
if (fInterlace)
gdImageInterlace(ipn, 1);
if (!bgnondefault)
gdImageColorTransparent(ipn, cbg);
Verbose("Done\n");
Verbose("Copying image: ");
gdImageCopy(ipn, ip, nX, nY, 0, 0, nW, nH);
Verbose("Done\n");
Verbose("Freeing old image: ");
gdImageDestroy(ip);
ip = ipn;
Verbose("Done\n");
}
Verbose("Exporting image to GIF file: ");
fp = fopen(outputfile, "w");
gdImageGif(ip, fp);
fclose(fp);
Verbose("Done\n");
Verbose("Freeing image: ");
gdImageDestroy(ip);
Verbose("Done\n");
return 0;
}
/*EOF*/
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