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#ifndef lint
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static const char RCSid[] = "$Id: meta2tga.c,v 1.8 2019/11/18 22:12:32 greg Exp $";
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#endif
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/*
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* Program to convert meta-files to Targa 8-bit color-mapped format
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*/
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#include "copyright.h"
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#include "rtprocess.h"
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#include "meta.h"
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#include "plot.h"
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#include "rast.h"
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#include "targa.h"
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#define MAXALLOC 100000
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#define DXSIZE 400 /* default x resolution */
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#define DYSIZE 400 /* default y resolution */
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#define XCOM "pexpand +vOCImsp -DP %s | psort +y"
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char *progname;
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SCANBLOCK outblock;
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int dxsiz = DXSIZE, dysiz = DYSIZE;
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int maxalloc = MAXALLOC;
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int ydown = 0;
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static char outname[64];
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static char *outtack = NULL;
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static FILE *fout;
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static int lineno = 0;
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static short condonly = FALSE,
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conditioned = FALSE;
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static int putthead(struct hdStruct *hp, char *ip, FILE *fp);
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char *
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findtack(char *s) /* find place to tack on suffix */
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{
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while (*s && *s != '.')
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s++;
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return(s);
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}
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int
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main(
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int argc,
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char **argv
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)
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{
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FILE *fp;
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char comargs[200], command[300];
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fout = stdout;
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progname = *argv++;
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argc--;
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condonly = FALSE;
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conditioned = FALSE;
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while (argc && **argv == '-') {
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switch (*(*argv+1)) {
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case 'c':
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condonly = TRUE;
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break;
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case 'r':
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conditioned = TRUE;
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break;
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case 'm':
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minwidth = atoi(*++argv);
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argc--;
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break;
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case 'x':
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dxsiz = atoi(*++argv);
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argc--;
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break;
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case 'y':
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dysiz = atoi(*++argv);
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argc--;
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break;
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case 'o':
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strcpy(outname, *++argv);
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outtack = findtack(outname);
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argc--;
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break;
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default:
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error(WARNING, "unknown option");
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break;
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}
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argv++;
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argc--;
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}
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if (conditioned) {
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if (argc)
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while (argc) {
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fp = efopen(*argv, "r");
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plot(fp);
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fclose(fp);
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argv++;
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argc--;
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}
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else
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plot(stdin);
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if (lineno)
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nextpage();
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} else {
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comargs[0] = '\0';
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while (argc) {
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strcat(comargs, " ");
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strcat(comargs, *argv);
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argv++;
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argc--;
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}
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sprintf(command, XCOM, comargs);
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if (condonly)
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return(system(command));
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else {
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if ((fp = popen(command, "r")) == NULL)
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error(SYSTEM, "cannot execute input filter");
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plot(fp);
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pclose(fp);
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if (lineno)
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nextpage();
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}
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}
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return(0);
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}
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void
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thispage(void) /* rewind current file */
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{
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if (lineno)
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error(USER, "cannot restart page in thispage");
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}
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void
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initfile(void) /* initialize this file */
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{
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static const unsigned char cmap[24] = {0,0,0, 0,0,255, 0,188,0, 255,152,0,
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0,200,200, 255,0,255, 179,179,0, 255,255,255};
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static int filenum = 0;
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struct hdStruct thead;
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int i;
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if (outtack != NULL) {
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sprintf(outtack, "%d.tga", ++filenum);
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fout = efopen(outname, "w");
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}
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if (fout == NULL)
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error(USER, "no output file");
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thead.mapType = CM_HASMAP;
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thead.dataType = IM_CCMAP;
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thead.mapOrig = 0;
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thead.mapLength = 256;
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thead.CMapBits = 24;
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thead.XOffset = 0;
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thead.YOffset = 0;
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thead.x = dxsiz;
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thead.y = dysiz;
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thead.dataBits = 8;
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thead.imType = 0;
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putthead(&thead, NULL, fout);
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for (i = 0; i < 8*3; i++)
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putc(cmap[i], fout);
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while (i++ < 256*3)
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putc(0, fout);
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}
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void
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nextpage(void) /* advance to next page */
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{
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if (lineno == 0)
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return;
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if (fout != NULL) {
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while (lineno < dysiz) {
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nextblock();
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outputblock();
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}
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fclose(fout);
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fout = NULL;
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}
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lineno = 0;
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}
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#define MINRUN 4
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void
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printblock(void) /* output scanline block to file */
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{
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int i, c2;
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unsigned char *scanline;
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int j, beg, cnt = 0;
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if (lineno == 0)
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initfile();
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for (i = outblock.ybot; i <= outblock.ytop && i < dysiz; i++) {
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scanline = outblock.cols[i-outblock.ybot];
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for (j = outblock.xleft; j <= outblock.xright; j += cnt) {
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for (beg = j; beg <= outblock.xright; beg += cnt) {
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for (cnt = 1; cnt < 128 && beg+cnt <= outblock.xright &&
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scanline[beg+cnt] == scanline[beg]; cnt++)
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;
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if (cnt >= MINRUN)
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break; /* long enough */
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}
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while (j < beg) { /* write out non-run */
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if ((c2 = beg-j) > 128) c2 = 128;
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putc(c2-1, fout);
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while (c2--)
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putc(scanline[j++], fout);
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}
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if (cnt >= MINRUN) { /* write out run */
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putc(127+cnt, fout);
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putc(scanline[beg], fout);
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} else
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cnt = 0;
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}
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lineno++;
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}
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}
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void
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putint2( /* put a 2-byte positive integer */
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int i,
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FILE *fp
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)
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{
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putc(i&0xff, fp);
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putc(i>>8&0xff, fp);
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}
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int
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putthead( /* write header to output */
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struct hdStruct *hp,
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char *ip,
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FILE *fp
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)
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{
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if (ip != NULL)
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putc(strlen(ip), fp);
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else
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putc(0, fp);
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putc(hp->mapType, fp);
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putc(hp->dataType, fp);
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putint2(hp->mapOrig, fp);
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putint2(hp->mapLength, fp);
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putc(hp->CMapBits, fp);
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putint2(hp->XOffset, fp);
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putint2(hp->YOffset, fp);
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putint2(hp->x, fp);
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putint2(hp->y, fp);
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putc(hp->dataBits, fp);
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putc(hp->imType, fp);
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if (ip != NULL)
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fputs(ip, fp);
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return(ferror(fp) ? -1 : 0);
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}
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