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greg |
2.1 |
/* Copyright (c) 1992 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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/* |
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* vgaimage.c - driver for VGA board under DOS |
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*/ |
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#include "standard.h" |
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#include <graph.h> |
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#include "color.h" |
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#include "random.h" |
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#include "resolu.h" |
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#include <dos.h> |
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#include <i86.h> |
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#define M_RDOWN 0x8 |
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#define M_RUP 0x10 |
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#define M_LDOWN 0x2 |
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#define M_LUP 0x4 |
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#define M_MOTION 0x1 |
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int crad; |
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#define right_button (mouse_event & M_RIGHTBUTT) |
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#define left_button (mouse_event & M_LEFTBUTT) |
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int mouse_event = 0; |
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int mouse_xpos = -1; |
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int mouse_ypos = -1; |
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#define CTRL(c) ((c)-'@') |
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#define MAXWIDTH 1024 |
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#define MAXHEIGHT 768 |
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short ourblack = 0; ourwhite = 1; |
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double gamcor = 2.2; /* gamma correction */ |
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int dither = 1; /* dither colors? */ |
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int maxcolors = 0; /* maximum colors */ |
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int minpix = 0; /* minimum pixel value */ |
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int greyscale = 0; /* in grey */ |
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int scale = 0; /* scalefactor; power of two */ |
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COLR scanline[MAXWIDTH]; /* scan line buffer */ |
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int xmax, ymax; /* picture dimensions */ |
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FILE *fin = stdin; /* input file */ |
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long scanpos[MAXHEIGHT]; /* scan line positions in file */ |
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int cury = 0; /* current scan location */ |
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double exposure = 1.0; /* exposure compensation used */ |
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int wrongformat = 0; /* input in another format? */ |
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struct { |
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int xmin, ymin, xsiz, ysiz; |
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} box = {0, 0, 0, 0}; /* current box */ |
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int initialized = 0; |
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int cheight, cwidth; |
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#define postext(x,y) _settextposition(1+(y)/cheight,1+(x)/cwidth) |
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char *progname; |
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char errmsg[128]; |
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extern BYTE clrtab[256][3]; /* global color map */ |
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extern long ftell(); |
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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{ |
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extern char *getenv(), *fixargv0(); |
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char *gv; |
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int headline(); |
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int i; |
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progname = argv[0] = fixargv0(argv[0]); |
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if ((gv = getenv("GAMMA")) != NULL) |
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gamcor = atof(gv); |
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for (i = 1; i < argc; i++) |
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if (argv[i][0] == '-') |
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switch (argv[i][1]) { |
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case 'c': |
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maxcolors = atoi(argv[++i]); |
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break; |
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case 'b': |
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greyscale = !greyscale; |
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break; |
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case 'm': |
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maxcolors = 2; |
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break; |
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case 'd': |
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dither = !dither; |
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break; |
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case 'e': |
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if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
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goto userr; |
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scale = atoi(argv[++i]); |
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break; |
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case 'g': |
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gamcor = atof(argv[++i]); |
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break; |
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default: |
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goto userr; |
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} |
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else |
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break; |
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if (i == argc-1) { /* open picture */ |
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fin = fopen(argv[i], "r"); |
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if (fin == NULL) { |
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sprintf(errmsg, "cannot open file \"%s\"", argv[i]); |
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quiterr(errmsg); |
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} |
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} else if (i != argc) |
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goto userr; |
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setmode(fileno(fin), O_BINARY); |
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/* get header */ |
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getheader(fin, headline, NULL); |
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/* get picture dimensions */ |
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if (wrongformat || fgetresolu(&xmax, &ymax, fin) < 0) |
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quiterr("bad picture format"); |
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if (xmax > MAXWIDTH | ymax > MAXHEIGHT) |
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quiterr("input picture too large for VGA"); |
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init(); /* initialize and display */ |
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while (docommand()) /* loop on command */ |
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; |
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quiterr(NULL); |
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userr: |
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fprintf(stderr, |
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"Usage: %s [-b][-m][-d][-c ncolors][-e +/-stops] file\n", progname); |
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exit(1); |
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} |
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headline(s) /* get relevant info from header */ |
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char *s; |
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{ |
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char fmt[32]; |
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if (isexpos(s)) |
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exposure *= exposval(s); |
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else if (isformat(s)) { |
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formatval(fmt, s); |
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wrongformat = strcmp(fmt, COLRFMT); |
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} |
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} |
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init() /* initialize and load display */ |
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{ |
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static struct { |
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short mode; |
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short xsiz, ysiz; |
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} video[] = { |
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{_MRES256COLOR, 320, 200}, |
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{_VRES256COLOR, 640, 400}, |
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{_SVRES256COLOR, 800, 600}, |
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{_XRES256COLOR, 1024, 768}, |
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-1 |
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}; |
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struct videoconfig config; |
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register int i; |
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/* pick a card... */ |
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for (i = 0; video[i].mode != -1; i++) |
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if (video[i].xsiz >= xmax && video[i].ysiz >= ymax) |
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break; |
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if (video[i].mode == -1) |
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quiterr("input picture too large"); |
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if (_setvideomode(video[i].mode) == 0) |
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quiterr("inadequate display card for picture"); |
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initialized = 1; |
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_getvideoconfig(&config); |
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if (maxcolors == 0) |
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maxcolors = config.numcolors; |
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if (maxcolors > 4) { |
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maxcolors -= minpix = 2; |
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_settextcolor(ourwhite); |
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} |
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cheight = config.numypixels/config.numtextrows; |
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cwidth = config.numxpixels/config.numtextcols; |
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/* clear scan position array */ |
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for (i = 0; i < ymax; i++) |
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scanpos[i] = -1; |
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/* display image */ |
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if (greyscale) |
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greyimage(); |
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else |
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mappedimage(); |
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} |
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quiterr(err) /* print message and exit */ |
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char *err; |
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{ |
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if (initialized) |
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_setvideomode(_DEFAULTMODE); |
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if (err != NULL) { |
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fprintf(stderr, "%s: %s\n", progname, err); |
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exit(1); |
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} |
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exit(0); |
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} |
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int |
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docommand() /* execute command */ |
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{ |
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char buf[64]; |
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COLOR cval; |
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int com; |
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double comp; |
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while (!kbhit()) |
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watch_mouse(); |
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com = getch(); |
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switch (com) { /* interpret command */ |
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case 'q': |
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case CTRL('Z'): /* quit */ |
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return(0); |
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case '\n': |
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case '\r': |
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case 'l': |
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case 'c': /* value */ |
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if (avgbox(cval) == -1) |
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return(-1); |
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switch (com) { |
| 242 |
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case '\n': |
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case '\r': /* radiance */ |
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sprintf(buf, "%.3f", intens(cval)/exposure); |
| 245 |
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break; |
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case 'l': /* luminance */ |
| 247 |
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sprintf(buf, "%.0fL", luminance(cval)/exposure); |
| 248 |
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break; |
| 249 |
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case 'c': /* color */ |
| 250 |
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comp = pow(2.0, (double)scale); |
| 251 |
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sprintf(buf, "(%.2f,%.2f,%.2f)", |
| 252 |
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colval(cval,RED)*comp, |
| 253 |
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colval(cval,GRN)*comp, |
| 254 |
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colval(cval,BLU)*comp); |
| 255 |
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break; |
| 256 |
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} |
| 257 |
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postext(box.xmin+box.xsiz/2, box.ymin+box.ysiz/2); |
| 258 |
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_outtext(buf); |
| 259 |
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return(1); |
| 260 |
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default: |
| 261 |
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return(-1); |
| 262 |
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} |
| 263 |
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} |
| 264 |
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| 265 |
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| 266 |
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watch_mouse() /* look after mousie */ |
| 267 |
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{ |
| 268 |
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static int mouse_installed = 0; |
| 269 |
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int a_x, a_y, l_x, l_y; |
| 270 |
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| 271 |
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if (!mouse_installed) { |
| 272 |
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ms_init(); |
| 273 |
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mouse_installed = 1; |
| 274 |
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} |
| 275 |
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if (mouse_event & M_MOTION) |
| 276 |
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move_cursor(mouse_xpos, mouse_ypos); |
| 277 |
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if (!(mouse_event & M_LDOWN)) |
| 278 |
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return; |
| 279 |
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l_x = a_x = mouse_xpos; l_y = a_y = mouse_ypos; |
| 280 |
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move_cursor(-1, -1); /* hide cursor */ |
| 281 |
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revbox(a_x, a_y, l_x, l_y); /* show box */ |
| 282 |
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do { |
| 283 |
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mouse_event = 0; |
| 284 |
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while (!mouse_event) |
| 285 |
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; |
| 286 |
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if (mouse_event & M_MOTION) { |
| 287 |
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revbox(a_x, a_y, l_x, l_y); |
| 288 |
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revbox(a_x, a_y, l_x=mouse_xpos, l_y=mouse_ypos); |
| 289 |
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} |
| 290 |
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} while (!(mouse_event & M_LUP)); |
| 291 |
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revbox(a_x, a_y, l_x, l_y); /* hide box */ |
| 292 |
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move_cursor(mouse_xpos, mouse_ypos); /* show cursor */ |
| 293 |
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box.xmin = mouse_xpos; |
| 294 |
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box.ymin = mouse_ypos; |
| 295 |
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if (box.xmin > a_x) { |
| 296 |
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box.xsiz = box.xmin - a_x + 1; |
| 297 |
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box.xmin = a_x; |
| 298 |
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} else { |
| 299 |
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box.xsiz = a_x - box.xmin + 1; |
| 300 |
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} |
| 301 |
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if (box.ymin > a_y) { |
| 302 |
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box.ysiz = box.ymin - a_y + 1; |
| 303 |
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box.ymin = a_y; |
| 304 |
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} else { |
| 305 |
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box.ysiz = a_y - box.ymin + 1; |
| 306 |
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} |
| 307 |
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mouse_event = 0; |
| 308 |
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} |
| 309 |
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| 310 |
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| 311 |
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revbox(x0, y0, x1, y1) /* draw box with reversed lines */ |
| 312 |
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int x0, y0, x1, y1; |
| 313 |
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{ |
| 314 |
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_setplotaction(_GXOR); |
| 315 |
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_setcolor(255); |
| 316 |
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_moveto(x0, y0); |
| 317 |
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_lineto(x1, y0); |
| 318 |
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_lineto(x1, y1); |
| 319 |
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_lineto(x0, y1); |
| 320 |
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_lineto(x0, y0); |
| 321 |
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} |
| 322 |
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| 323 |
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| 324 |
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int |
| 325 |
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avgbox(clr) /* average color over current box */ |
| 326 |
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COLOR clr; |
| 327 |
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{ |
| 328 |
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static COLOR lc; |
| 329 |
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static int ll, lr, lt, lb; |
| 330 |
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int left, right, top, bottom; |
| 331 |
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int y; |
| 332 |
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double d; |
| 333 |
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COLOR ctmp; |
| 334 |
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register int x; |
| 335 |
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| 336 |
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setcolor(clr, 0.0, 0.0, 0.0); |
| 337 |
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left = box.xmin; |
| 338 |
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right = left + box.xsiz; |
| 339 |
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if (left < 0) |
| 340 |
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left = 0; |
| 341 |
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if (right > xmax) |
| 342 |
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right = xmax; |
| 343 |
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if (left >= right) |
| 344 |
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return(-1); |
| 345 |
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top = box.ymin; |
| 346 |
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bottom = top + box.ysiz; |
| 347 |
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if (top < 0) |
| 348 |
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top = 0; |
| 349 |
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if (bottom > ymax) |
| 350 |
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bottom = ymax; |
| 351 |
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if (top >= bottom) |
| 352 |
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return(-1); |
| 353 |
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if (left == ll && right == lr && top == lt && bottom == lb) { |
| 354 |
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copycolor(clr, lc); |
| 355 |
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return(0); |
| 356 |
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} |
| 357 |
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for (y = top; y < bottom; y++) { |
| 358 |
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if (getscan(y) == -1) |
| 359 |
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return(-1); |
| 360 |
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for (x = left; x < right; x++) { |
| 361 |
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colr_color(ctmp, scanline[x]); |
| 362 |
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addcolor(clr, ctmp); |
| 363 |
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} |
| 364 |
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} |
| 365 |
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d = 1.0/((right-left)*(bottom-top)); |
| 366 |
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scalecolor(clr, d); |
| 367 |
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ll = left; lr = right; lt = top; lb = bottom; |
| 368 |
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copycolor(lc, clr); |
| 369 |
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return(0); |
| 370 |
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} |
| 371 |
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| 372 |
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| 373 |
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setpalette() /* set our palette using clrtab */ |
| 374 |
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{ |
| 375 |
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long cvals[256]; |
| 376 |
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register int i; |
| 377 |
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| 378 |
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if (minpix >= 2) { |
| 379 |
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cvals[ourblack] = _BLACK; cvals[ourwhite] = _BRIGHTWHITE; |
| 380 |
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} |
| 381 |
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for (i = 0; i < maxcolors; i++) |
| 382 |
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cvals[i+minpix] = clrtab[i][BLU]<<14 & 0x3f0000L | |
| 383 |
|
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clrtab[i][GRN]<<6 & 0x3f00 | |
| 384 |
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clrtab[i][RED]>>2; |
| 385 |
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_remapallpalette(cvals); |
| 386 |
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} |
| 387 |
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| 388 |
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| 389 |
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greyimage() /* display greyscale image */ |
| 390 |
|
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{ |
| 391 |
|
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short thiscolor, lastcolor = -1; |
| 392 |
|
|
int y; |
| 393 |
|
|
register int x; |
| 394 |
|
|
/* set gamma correction */ |
| 395 |
|
|
setcolrgam(gamcor); |
| 396 |
|
|
/* set up color map */ |
| 397 |
|
|
for (x = 0; x < maxcolors; x++) |
| 398 |
|
|
clrtab[x][RED] = clrtab[x][GRN] = |
| 399 |
|
|
clrtab[x][BLU] = ((long)x*256+maxcolors/2)/maxcolors; |
| 400 |
|
|
setpalette(); |
| 401 |
|
|
_setplotaction(_GPSET); |
| 402 |
|
|
/* read and display file */ |
| 403 |
|
|
for (y = 0; y < ymax; y++) { |
| 404 |
|
|
getscan(y); |
| 405 |
|
|
if (scale) |
| 406 |
|
|
shiftcolrs(scanline, xmax, scale); |
| 407 |
|
|
colrs_gambs(scanline, xmax); |
| 408 |
|
|
if (maxcolors < 256) |
| 409 |
|
|
for (x = 0; x < xmax; x++) { |
| 410 |
|
|
thiscolor = ((long)normbright(scanline[x]) * |
| 411 |
|
|
maxcolors + 128) >> 8; |
| 412 |
|
|
if (thiscolor != lastcolor) |
| 413 |
|
|
_setcolor((lastcolor=thiscolor)+minpix); |
| 414 |
|
|
_setpixel(x, y); |
| 415 |
|
|
} |
| 416 |
|
|
else |
| 417 |
|
|
for (x = 0; x < xmax; x++) { |
| 418 |
|
|
thiscolor = normbright(scanline[x]); |
| 419 |
|
|
if (thiscolor != lastcolor) |
| 420 |
|
|
_setcolor((lastcolor=thiscolor)+minpix); |
| 421 |
|
|
_setpixel(x, y); |
| 422 |
|
|
} |
| 423 |
|
|
} |
| 424 |
|
|
} |
| 425 |
|
|
|
| 426 |
|
|
|
| 427 |
|
|
mappedimage() /* display color-mapped image */ |
| 428 |
|
|
{ |
| 429 |
|
|
BYTE bscan[MAXWIDTH]; |
| 430 |
|
|
int y; |
| 431 |
|
|
register int x; |
| 432 |
|
|
/* set gamma correction */ |
| 433 |
|
|
setcolrgam(gamcor); |
| 434 |
|
|
/* make histogram */ |
| 435 |
|
|
new_histo(); |
| 436 |
|
|
for (y = 0; y < ymax; y++) { |
| 437 |
|
|
if (getscan(y) < 0) |
| 438 |
|
|
quiterr("seek error in getmapped"); |
| 439 |
|
|
if (scale) |
| 440 |
|
|
shiftcolrs(scanline, xmax, scale); |
| 441 |
|
|
colrs_gambs(scanline, xmax); |
| 442 |
|
|
cnt_colrs(scanline, xmax); |
| 443 |
|
|
} |
| 444 |
|
|
/* map pixels */ |
| 445 |
|
|
if (!new_clrtab(maxcolors)) |
| 446 |
|
|
quiterr("cannot create color map"); |
| 447 |
|
|
setpalette(); |
| 448 |
|
|
_setplotaction(_GPSET); |
| 449 |
|
|
/* display image */ |
| 450 |
|
|
for (y = 0; y < ymax; y++) { |
| 451 |
|
|
if (getscan(y) < 0) |
| 452 |
|
|
quiterr("seek error in getmapped"); |
| 453 |
|
|
if (scale) |
| 454 |
|
|
shiftcolrs(scanline, xmax, scale); |
| 455 |
|
|
colrs_gambs(scanline, xmax); |
| 456 |
|
|
if (dither) |
| 457 |
|
|
dith_colrs(bscan, scanline, xmax); |
| 458 |
|
|
else |
| 459 |
|
|
map_colrs(bscan, scanline, xmax); |
| 460 |
|
|
for (x = 0; x < xmax; x++) { |
| 461 |
|
|
if (x==0 || bscan[x] != bscan[x-1]) |
| 462 |
|
|
_setcolor(bscan[x]+minpix); |
| 463 |
|
|
_setpixel(x, y); |
| 464 |
|
|
} |
| 465 |
|
|
} |
| 466 |
|
|
} |
| 467 |
|
|
|
| 468 |
|
|
|
| 469 |
|
|
getscan(y) |
| 470 |
|
|
int y; |
| 471 |
|
|
{ |
| 472 |
|
|
if (y != cury) { |
| 473 |
|
|
if (scanpos[y] == -1) |
| 474 |
|
|
return(-1); |
| 475 |
|
|
if (fseek(fin, scanpos[y], 0) == -1) |
| 476 |
|
|
quiterr("fseek error"); |
| 477 |
|
|
cury = y; |
| 478 |
|
|
} else if (scanpos != NULL && scanpos[y] == -1) |
| 479 |
|
|
scanpos[y] = ftell(fin); |
| 480 |
|
|
|
| 481 |
|
|
if (freadcolrs(scanline, xmax, fin) < 0) |
| 482 |
|
|
quiterr("picture read error"); |
| 483 |
|
|
|
| 484 |
|
|
cury++; |
| 485 |
|
|
return(0); |
| 486 |
|
|
} |
| 487 |
|
|
|
| 488 |
|
|
|
| 489 |
|
|
/* |
| 490 |
|
|
* Microsoft Mouse handling routines |
| 491 |
|
|
*/ |
| 492 |
|
|
|
| 493 |
|
|
|
| 494 |
|
|
#pragma off (check_stack) |
| 495 |
|
|
void _loadds far mouse_handler (int max, int mcx, int mdx) |
| 496 |
|
|
{ |
| 497 |
|
|
#pragma aux mouse_handler parm [EAX] [ECX] [EDX] |
| 498 |
|
|
mouse_event = max; |
| 499 |
|
|
mouse_xpos = mcx; |
| 500 |
|
|
mouse_ypos = mdx * (long)ymax / 200; /* kludge */ |
| 501 |
|
|
if (mouse_xpos >= xmax) mouse_xpos = xmax-1; |
| 502 |
|
|
if (mouse_ypos >= ymax) mouse_ypos = ymax-1; |
| 503 |
|
|
} |
| 504 |
|
|
#pragma on (check_stack) |
| 505 |
|
|
|
| 506 |
|
|
|
| 507 |
|
|
void |
| 508 |
|
|
move_cursor(newx, newy) /* move cursor to new position */ |
| 509 |
|
|
int newx, newy; |
| 510 |
|
|
{ |
| 511 |
|
|
static char *imp = NULL; |
| 512 |
|
|
static int curx = -1, cury = -1; |
| 513 |
|
|
#define xcmin (curx-crad<0 ? 0 : curx-crad) |
| 514 |
|
|
#define ycmin (cury-crad<0 ? 0 : cury-crad) |
| 515 |
|
|
#define xcmax (curx+crad>=xmax ? xmax-1 : curx+crad) |
| 516 |
|
|
#define ycmax (cury+crad>=ymax ? ymax-1 : cury+crad) |
| 517 |
|
|
|
| 518 |
|
|
if (newx == curx & newy == cury) |
| 519 |
|
|
return; |
| 520 |
|
|
if (imp == NULL && |
| 521 |
|
|
(imp = bmalloc(_imagesize(0,0,2*crad+1,2*crad+1))) == NULL) { |
| 522 |
|
|
quiterr("out of memory in move_cursor"); |
| 523 |
|
|
} |
| 524 |
|
|
if (curx >= 0 & cury >= 0) /* clear old cursor */ |
| 525 |
|
|
_putimage(xcmin, ycmin, imp, _GPSET); |
| 526 |
|
|
/* record new position */ |
| 527 |
|
|
curx = newx; cury = newy; |
| 528 |
|
|
if (curx < 0 | cury < 0) |
| 529 |
|
|
return; /* no cursor */ |
| 530 |
|
|
/* save under new cursor */ |
| 531 |
|
|
_getimage(xcmin, ycmin, xcmax, ycmax, imp); |
| 532 |
|
|
/* draw new cursor */ |
| 533 |
|
|
_setplotaction(_GPSET); |
| 534 |
|
|
_setcolor(ourwhite); |
| 535 |
|
|
_rectangle(_GFILLINTERIOR, xcmin, cury-1, xcmax, cury+1); |
| 536 |
|
|
_rectangle(_GFILLINTERIOR, curx-1, ycmin, curx+1, ycmax); |
| 537 |
|
|
_setcolor(ourblack); |
| 538 |
|
|
_moveto(xcmin+1, cury); |
| 539 |
|
|
_lineto(xcmax-1, cury); |
| 540 |
|
|
_moveto(curx, ycmin+1); |
| 541 |
|
|
_lineto(curx, ycmax-1); |
| 542 |
|
|
#undef xcmin |
| 543 |
|
|
#undef ycmin |
| 544 |
|
|
#undef xcmax |
| 545 |
|
|
#undef ycmax |
| 546 |
|
|
} |
| 547 |
|
|
|
| 548 |
|
|
|
| 549 |
|
|
int |
| 550 |
|
|
ms_init() |
| 551 |
|
|
{ |
| 552 |
|
|
struct SREGS sregs; |
| 553 |
|
|
union REGS inregs, outregs; |
| 554 |
|
|
int far *ptr; |
| 555 |
|
|
int (far *function_ptr)(); |
| 556 |
|
|
|
| 557 |
|
|
segread(&sregs); |
| 558 |
|
|
|
| 559 |
|
|
/* check for mouse driver */ |
| 560 |
|
|
|
| 561 |
|
|
inregs.w.ax = 0; |
| 562 |
|
|
int386 (0x33, &inregs, &outregs); |
| 563 |
|
|
if( outregs.w.ax != -1 ) { |
| 564 |
|
|
return(0); |
| 565 |
|
|
} |
| 566 |
|
|
|
| 567 |
|
|
crad = ymax/40; |
| 568 |
|
|
|
| 569 |
|
|
/* install watcher */ |
| 570 |
|
|
|
| 571 |
|
|
inregs.w.ax = 0xC; |
| 572 |
|
|
inregs.w.cx = M_LDOWN | M_LUP | M_MOTION; |
| 573 |
|
|
function_ptr = mouse_handler; |
| 574 |
|
|
inregs.x.edx = FP_OFF( function_ptr ); |
| 575 |
|
|
sregs.es = FP_SEG( function_ptr ); |
| 576 |
|
|
int386x( 0x33, &inregs, &outregs, &sregs ); |
| 577 |
|
|
|
| 578 |
|
|
return(1); |
| 579 |
|
|
} |
