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/*
* Copyright (C) 2000, Matias Atria
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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 the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/* postscript specials */
#include <config.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#include "mdvi.h"
#include "private.h"
typedef struct {
double ox;
double oy;
double bw;
double bh;
double angle;
} EpsfBox;
#define LLX 0
#define LLY 1
#define URX 2
#define URY 3
#define RWI 4
#define RHI 5
#define HOFF 6
#define VOFF 7
#define HSIZE 8
#define VSIZE 9
#define HSCALE 10
#define VSCALE 11
#define ANGLE 12
#define CLIP 13
void epsf_special __PROTO((DviContext *dvi, char *prefix, char *arg));
/* Note: the given strings are modified in place */
static char *parse_epsf_special(EpsfBox *box, char **ret,
char *prefix, char *arg)
{
static struct {
char *name;
int has_arg;
char *value;
} keys[] = {
{"llx", 1, "0"},
{"lly", 1, "0"},
{"urx", 1, "0"},
{"ury", 1, "0"},
{"rwi", 1, "0"},
{"rhi", 1, "0"},
{"hoffset", 1, "0"},
{"voffset", 1, "0"},
{"hsize", 1, "612"},
{"vsize", 1, "792"},
{"hscale", 1, "100"},
{"vscale", 1, "100"},
{"angle", 1, "0"},
{"clip", 0, "0"}
};
#define NKEYS (sizeof(keys) / sizeof(keys[0]))
char *ptr;
char *filename;
double value[NKEYS];
Uchar present[NKEYS];
Buffer buffer;
char *name;
int i;
double originx;
double originy;
double hsize;
double vsize;
double hscale;
double vscale;
/* this special has the form
* ["]file.ps["] [key=valye]*
*/
/* scan the filename */
while(*arg == ' ' || *arg == '\t')
arg++;
/* make a copy of the string */
ptr = arg;
if(*ptr == '"')
for(name = ++ptr; *ptr && *ptr != '"'; ptr++);
else
for(name = ptr; *ptr && *ptr != ' ' && *ptr != '\t'; ptr++);
if(ptr == name)
return NULL;
*ptr++ = 0;
filename = name;
/* reset values to defaults */
for(i = 0; i < NKEYS; i++) {
value[i] = atof(keys[i].value);
present[i] = 0;
}
buff_init(&buffer);
buff_add(&buffer, "@beginspecial ", 0);
while(*ptr) {
const char *keyname;
char *val;
char *p;
while(*ptr == ' ' || *ptr == '\t')
ptr++;
keyname = ptr;
/* get the whole key=value pair */
for(; *ptr && *ptr != ' ' && *ptr != '\t'; ptr++);
if(*ptr) *ptr++ = 0;
/* now we shouldn't touch `ptr' anymore */
/* now work on this pair */
p = strchr(keyname, '=');
if(p == NULL)
val = NULL;
else {
*p++ = 0;
if(*p == '"') {
val = ++p;
/* skip until closing quote */
while(*p && *p != '"')
p++;
if(*p != '"')
mdvi_warning(
_("%s: malformed value for key `%s'\n"),
filename, keyname);
} else
val = p;
}
/* lookup the key */
for(i = 0; i < NKEYS; i++)
if(STRCEQ(keys[i].name, keyname))
break;
if(i == NKEYS) {
mdvi_warning(_("%s: unknown key `%s' ignored\n"),
filename, keyname);
continue;
}
if(keys[i].has_arg && val == NULL) {
mdvi_warning(_("%s: no argument for key `%s', using defaults\n"),
filename, keyname);
val = keys[i].value;
} else if(!keys[i].has_arg && val) {
mdvi_warning(_("%s: argument `%s' ignored for key `%s'\n"),
filename, val, keyname);
val = NULL;
}
if(val)
value[i] = atof(val);
/* put the argument */
buff_add(&buffer, val, 0);
buff_add(&buffer, " @", 2);
buff_add(&buffer, keyname, 0);
buff_add(&buffer, " ", 1);
/* remember that this option was given */
present[i] = 0xff;
}
buff_add(&buffer, " @setspecial", 0);
/* now compute the bounding box (code comes from dvips) */
originx = 0;
originy = 0;
hscale = 1;
vscale = 1;
hsize = 0;
vsize = 0;
if(present[HSIZE])
hsize = value[HSIZE];
if(present[VSIZE])
vsize = value[VSIZE];
if(present[HOFF])
originx = value[HOFF];
if(present[VOFF])
originy = value[VOFF];
if(present[HSCALE])
hscale = value[HSCALE] / 100.0;
if(present[VSCALE])
vscale = value[VSCALE] / 100.0;
if(present[URX] && present[LLX])
hsize = value[URX] - value[LLX];
if(present[URY] && present[LLY])
vsize = value[URY] - value[LLY];
if(present[RWI] || present[RHI]) {
if(present[RWI] && !present[RHI])
hscale = vscale = value[RWI] / (10.0 * hsize);
else if(present[RHI] && !present[RWI])
hscale = vscale = value[RHI] / (10.0 * vsize);
else {
hscale = value[RWI] / (10.0 * hsize);
vscale = value[RHI] / (10.0 * vsize);
}
}
box->ox = originx;
box->oy = originy;
box->bw = hsize * hscale;
box->bh = vsize * vscale;
box->angle = value[ANGLE];
*ret = buffer.data;
return filename;
}
void epsf_special(DviContext *dvi, char *prefix, char *arg)
{
char *file;
char *special;
char *psfile;
char *tmp;
EpsfBox box = {0, 0, 0, 0};
int x, y;
int w, h;
double xf, vf;
struct stat buf;
file = parse_epsf_special(&box, &special, prefix, arg);
if (file != NULL)
mdvi_free (special);
xf = dvi->params.dpi * dvi->params.mag / (72.0 * dvi->params.hshrink);
vf = dvi->params.vdpi * dvi->params.mag / (72.0 * dvi->params.vshrink);
w = FROUND(box.bw * xf);
h = FROUND(box.bh * vf);
x = FROUND(box.ox * xf) + dvi->pos.hh;
y = FROUND(box.oy * vf) + dvi->pos.vv - h + 1;
if (!file || !dvi->device.draw_ps) {
dvi->device.draw_rule (dvi, x, y, w, h, 0);
return;
}
if (file[0] == '/') { /* Absolute path */
if (stat (file, &buf) == 0)
dvi->device.draw_ps (dvi, file, x, y, w, h);
else
dvi->device.draw_rule (dvi, x, y, w, h, 0);
return;
}
tmp = mdvi_strrstr (dvi->filename, "/");
if (tmp) { /* Document directory */
int path_len = strlen (dvi->filename) - strlen (tmp + 1);
int file_len = strlen (file);
psfile = mdvi_malloc (path_len + file_len + 1);
psfile[0] = '\0';
strncat (psfile, dvi->filename, path_len);
strncat (psfile, file, file_len);
if (stat (psfile, &buf) == 0) {
dvi->device.draw_ps (dvi, psfile, x, y, w, h);
mdvi_free (psfile);
return;
}
mdvi_free (psfile);
}
psfile = mdvi_build_path_from_cwd (file);
if (stat (psfile, &buf) == 0) { /* Current working dir */
dvi->device.draw_ps (dvi, psfile, x, y, w, h);
mdvi_free (psfile);
return;
}
mdvi_free (psfile);
psfile = kpse_find_pict (file);
if (psfile) { /* kpse */
dvi->device.draw_ps (dvi, psfile, x, y, w, h);
} else {
dvi->device.draw_rule(dvi, x, y, w, h, 0);
}
free (psfile);
}
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