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#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#define import_spp
#define import_error
#include <iraf.h>
#include "sgiUtil.h"
/*
** SGI2SVG.C -- Read IRAF SGI metacode from standard input, translate into
** Scalable Vector Graphics (SVG) format.
**
** Usage
** sgi2svg.e [-params] [sgi_metacode] [| lpr -Papple]
**
** -fg <N> FG color specified as RGB triplet (e.g. 'F00' is red)
** -bg <N> BG color specified as RGB triplet (e.g. '0F0' is green)
** -fill <N> fill color specified as RGB triplet (e.g. '00F' is blue)
** -w <N> width of plot, device pixels starting from l
** -h <N> height of plot, device pixels starting from b
** -p <N> pen width
**
** Option values must be separated from their flags by a space; the input
** file name and the switches may occur in any order.
**
** Sample Graphcap:
**
** g-svg|UNIX generic interface to SVG file generator:\
** :DD=usvg,tmp$sgk,!{ sgidispatch sgi2svg -w $(PX) -h $(PY) \
** -bg FFF -fg 000 -fill FFF $F > sgi$$.svg ; }&:PX#640:PY#480:\
** :kf=bin$x_sgikern.e:tn=sgikern:tc=sgi_apl:
*/
#define OSOK 0 /* normal successful completion */
#define LEN_MCBUF 1024 /* number of SGK instrs in buffer */
#define SGK_FRAME 1 /* new frame instruction */
#define SGK_MOVE 2 /* move pen */
#define SGK_DRAW 3 /* draw pen */
#define SGK_SETLW 4 /* set line width */
#define GKI_MAXNDC 32767. /* SGK units */
/* Device opcodes and parameters.
*/
#define DEF_LEFT 0 /* origin in device pixels in x */
#define DEF_BOTTOM 0 /* origin in device pixels in y */
#define DEF_WIDTH 640 /* width in x (240d/i, 11" paper) */
#define DEF_HEIGHT 480 /* height in y (240d/i, 8.5" paper)*/
#define DEF_PENWIDTH 1 /* origin in device pixels in x */
/* Commands to setup SVG environment.
*/
static char *svg_prolog[] = {
"<?xml version=\"1.0\" standalone=\"no\"?>\n",
"<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\n",
" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n",
NULL
};
/* Opcode instruction.
*/
struct sgi_inst {
short opcode;
short x, y;
};
int pen_width = DEF_PENWIDTH; /* initial line width */
int width = DEF_WIDTH; /* margins */
int height = DEF_HEIGHT;
char *bg = "#FFF"; /* BG/FG colors */
char *fg = "#000";
char *fill = "#FFF"; /* vector fill color */
static void translate (FILE *in, FILE *out);
/* MAIN -- Main entry point for SGI2UHPGL. Optional arguments are device
** window parameters and name of input file.
*/
int
main (int argc, char *argv[])
{
FILE *in;
char *infile = "stdin", *argp;
int argno;
register char **lp;
/* Process the command line.
*/
for (argno=1; (argp = argv[argno]) != NULL; argno++) {
if (argp[0] == '-') {
/* A window-control or pen width switch.
*/
switch (argp[1]) {
case 'f':
if (argp[2] == 'g')
fg = argv[++argno];
else
fill = argv[++argno];
break;
case 'b':
bg = argv[++argno];
break;
case 'w': width = atoi (argv[++argno]); break;
case 'h': height = atoi (argv[++argno]); break;
case 'p': pen_width = atoi (argv[++argno]); break;
default:
break;
}
} else {
/* Input sgi-metacode file specification.
*/
infile = argp;
}
}
/* Open the input file. */
if (strcmp (infile, "stdin") == 0)
in = stdin;
else
in = fopen (infile, "r");
if (in == NULL) {
fprintf (stderr, "Fatal error (sgi2svg): Cannot open `%s'\n",
infile);
fflush (stderr);
exit (OSOK+1);
}
/* Output the standard prolog.
*/
for (lp=svg_prolog; *lp; lp++)
fputs (*lp, stdout);
fprintf (stdout,"<svg width=\"%dpx\" height=\"%dpx\" version=\"1.1\"\n",
width, height);
fprintf (stdout," xmlns=\"http://www.w3.org/2000/svg\">");
fprintf (stdout,
"<g id=\"g0\" fill=\"#%s\" stroke=\"#%s\" stroke-width=\"1\">\n",
bg, fg);
fprintf (stdout,
"<rect x=\"1\" y=\"1\" width=\"%d\" height=\"%d\"\n",
width, height);
fprintf (stdout,
" fill=\"#%s\" stroke=\"#%s\" stroke-width=\"1\"/>\n", fill, bg);
/* Process the metacode.
*/
translate (in, stdout);
/* Clean up.
*/
fprintf (stdout, "</g></svg>"); /* output the end of file */
if (in != stdin)
fclose (in);
return (0);
}
/* TRANSLATE -- Interpret input SGI metacode instructions into device
** instructions and write to stdout.
*/
static void
translate (FILE *in, FILE *out)
{
register struct sgi_inst *sgip;
struct sgi_inst inbuf[LEN_MCBUF], *buftop;
int n, in_stroke=0, swap_bytes = isSwapped();
int x, y, gnum=1;
/* Process the metacode:
*/
while ((n = fread ((char *)inbuf, sizeof(*sgip), LEN_MCBUF, in)) > 0) {
if (swap_bytes)
bswap2 ((unsigned char *)inbuf, (unsigned char *)inbuf,
sizeof(*sgip) * n);
buftop = inbuf + n;
for (sgip = inbuf; sgip < buftop; sgip++) {
switch (sgip->opcode) {
case SGK_FRAME:
fprintf (out, "\n");
break;
case SGK_MOVE:
x = (int) (((float)sgip->x / GKI_MAXNDC) * width);
y = (int) (((float)sgip->y / GKI_MAXNDC) * height);
y = height - y + 1;
if (in_stroke) /* end current stroke */
fprintf (out, "\"/>");
/* Begin a new output stroke.
*/
fprintf (out, "<polyline points=\"%d,%d", x, y);
in_stroke = 1;
break;
case SGK_DRAW:
x = (int) (((float)sgip->x / GKI_MAXNDC) * width);
y = (int) (((float)sgip->y / GKI_MAXNDC) * height);
y = height - y + 1;
fprintf (out, " %d,%d", x, y);
in_stroke = 1;
break;
case SGK_SETLW:
/* Set pen width.
*/
pen_width = sgip->x + 1;
if (in_stroke) /* end current stroke */
fprintf (out, "\"/></g>");
fprintf (out, "<g id=\"g%d\" stroke-width=\"%d\">",
gnum++, pen_width);
in_stroke = 0;
break;
default:
fprintf (stderr, "sgi2svg: unrecognized sgi opcode %d\n",
sgip->opcode);
break;
}
}
}
/* Terminate plotting and exit.
*/
fprintf (out, " \"/></g>\n");
}
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