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greg |
1.1 |
/* Copyright (c) 1990 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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* x11image.c - driver for X-windows |
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* |
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* 3/1/90 |
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*/ |
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/* |
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* Modified for X11 |
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* |
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* January 1990 |
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* |
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* Anat Grynberg and Greg Ward |
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*/ |
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#include "standard.h" |
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#include <X11/Xlib.h> |
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#include <X11/cursorfont.h> |
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#include <X11/Xutil.h> |
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#include "color.h" |
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#include "view.h" |
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#include "pic.h" |
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#include "x11raster.h" |
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#include "random.h" |
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#define FONTNAME "8x13" /* text font we'll use */ |
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#define CTRL(c) ('c'-'@') |
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#define BORWIDTH 5 /* border width */ |
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#define ourscreen DefaultScreen(thedisplay) |
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#define ourblack BlackPixel(thedisplay,ourscreen) |
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#define ourwhite WhitePixel(thedisplay,ourscreen) |
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#define ourroot RootWindow(thedisplay,ourscreen) |
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#define ourgc DefaultGC(thedisplay,ourscreen) |
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greg |
1.2 |
#define redraw(x,y,w,h) patch_raster(wind,(x)-xoff,(y)-yoff,x,y,w,h,ourras) |
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greg |
1.1 |
double gamcor = 2.2; /* gamma correction */ |
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int dither = 1; /* dither colors? */ |
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int fast = 0; /* keep picture in Pixmap? */ |
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Window wind = 0; /* our output window */ |
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Font fontid; /* our font */ |
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greg |
1.2 |
int maxcolors = 0; /* maximum colors */ |
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greg |
1.1 |
int greyscale = 0; /* in grey */ |
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int scale = 0; /* scalefactor; power of two */ |
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int xoff = 0; /* x image offset */ |
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int yoff = 0; /* y image offset */ |
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VIEW ourview = STDVIEW; /* image view parameters */ |
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int gotview = 0; /* got parameters from file */ |
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COLR *scanline; /* scan line buffer */ |
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int xmax, ymax; /* picture resolution */ |
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int width, height; /* window size */ |
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char *fname = NULL; /* input file name */ |
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FILE *fin = stdin; /* input file */ |
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long *scanpos = NULL; /* 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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XRASTER *ourras; /* our stored image */ |
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unsigned char *ourdata; /* our image data */ |
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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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char *geometry = NULL; /* geometry specification */ |
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char *progname; |
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char errmsg[128]; |
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extern long ftell(); |
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extern char *malloc(), *calloc(); |
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extern double atof(), pow(), log(); |
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Display *thedisplay; |
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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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int headline(); |
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int i; |
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progname = argv[0]; |
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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 'f': |
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fast = !fast; |
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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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if (!strcmp(argv[i], "-geometry")) |
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geometry = argv[++i]; |
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else |
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gamcor = atof(argv[++i]); |
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break; |
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default: |
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goto userr; |
| 139 |
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} |
| 140 |
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else |
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break; |
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| 143 |
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if (argc-i == 1) { |
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fname = argv[i]; |
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fin = fopen(fname, "r"); |
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if (fin == NULL) { |
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sprintf(errmsg, "can't open file \"%s\"", fname); |
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quiterr(errmsg); |
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} |
| 150 |
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} |
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/* get header */ |
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getheader(fin, headline); |
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/* get picture dimensions */ |
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if (fgetresolu(&xmax, &ymax, fin) != (YMAJOR|YDECR)) |
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quiterr("bad picture size"); |
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/* set view parameters */ |
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if (gotview && setview(&ourview) != NULL) |
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gotview = 0; |
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if ((scanline = (COLR *)malloc(xmax*sizeof(COLR))) == NULL) |
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quiterr("out of memory"); |
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init(); /* get file and open window */ |
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| 164 |
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for ( ; ; ) |
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getevent(); /* main loop */ |
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userr: |
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fprintf(stderr, |
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"Usage: %s [-geometry spec][-b][-m][-d][-f][-c ncolors][-e +/-stops] file\n", |
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progname); |
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quit(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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static char *altname[] = {"rview","rpict","pinterp",VIEWSTR,NULL}; |
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register char **an; |
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greg |
1.2 |
if (isexpos(s)) |
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exposure *= exposval(s); |
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greg |
1.1 |
else |
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for (an = altname; *an != NULL; an++) |
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if (!strncmp(*an, s, strlen(*an))) { |
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greg |
1.2 |
if (sscanview(&ourview, s+strlen(*an)) > 0) |
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greg |
1.1 |
gotview++; |
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return; |
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} |
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} |
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init() /* get data and open window */ |
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{ |
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XSizeHints oursizhints; |
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register int i; |
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if (fname != NULL) { |
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scanpos = (long *)malloc(ymax*sizeof(long)); |
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if (scanpos == NULL) |
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goto memerr; |
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for (i = 0; i < ymax; i++) |
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scanpos[i] = -1; |
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} |
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if ((thedisplay = XOpenDisplay(NULL)) == NULL) |
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quiterr("can't open display; DISPLAY variable set?"); |
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wind = XCreateSimpleWindow(thedisplay, |
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ourroot, 0, 0, xmax, ymax, BORWIDTH, ourblack, ourwhite); |
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if (wind == 0) |
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quiterr("can't create window"); |
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if (maxcolors == 0) { /* get number of available colors */ |
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greg |
1.2 |
i = DisplayPlanes(thedisplay,ourscreen); |
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maxcolors = i > 8 ? 256 : 1<<i; |
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greg |
1.1 |
if (maxcolors > 4) maxcolors -= 2; |
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} |
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fontid = XLoadFont(thedisplay, FONTNAME); |
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if (fontid == 0) |
| 217 |
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quiterr("can't get font"); |
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XSetFont(thedisplay, ourgc, fontid); |
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XStoreName(thedisplay, wind, fname == NULL ? progname : fname); |
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XDefineCursor(thedisplay, wind, XCreateFontCursor(thedisplay, |
| 221 |
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XC_diamond_cross)); |
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if (geometry != NULL) { |
| 223 |
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bzero((char *)&oursizhints, sizeof(oursizhints)); |
| 224 |
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i = XParseGeometry(geometry, &oursizhints.x, &oursizhints.y, |
| 225 |
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&oursizhints.width, &oursizhints.height); |
| 226 |
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if (i & (XValue|YValue) == (XValue|YValue)) { |
| 227 |
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oursizhints.flags |= USPosition; |
| 228 |
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if (i & XNegative) |
| 229 |
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oursizhints.x += DisplayWidth(thedisplay,ourscreen)-1; |
| 230 |
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if (i & YNegative) |
| 231 |
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oursizhints.y += DisplayHeight(thedisplay,ourscreen)-1; |
| 232 |
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} |
| 233 |
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if (i & (WidthValue|HeightValue) == (WidthValue|HeightValue)) |
| 234 |
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oursizhints.flags |= USSize; |
| 235 |
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XSetNormalHints(thedisplay, wind, &oursizhints); |
| 236 |
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} |
| 237 |
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/* store image */ |
| 238 |
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getras(); |
| 239 |
greg |
1.2 |
XSelectInput(thedisplay, wind, ButtonPressMask|ButtonReleaseMask |
| 240 |
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|ButtonMotionMask|StructureNotifyMask |
| 241 |
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|KeyPressMask|ExposureMask); |
| 242 |
greg |
1.1 |
XMapWindow(thedisplay, wind); |
| 243 |
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return; |
| 244 |
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memerr: |
| 245 |
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quiterr("out of memory"); |
| 246 |
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} /* end of init */ |
| 247 |
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| 248 |
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| 249 |
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quiterr(err) /* print message and exit */ |
| 250 |
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char *err; |
| 251 |
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{ |
| 252 |
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if (err != NULL) { |
| 253 |
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fprintf(stderr, "%s: %s\n", progname, err); |
| 254 |
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exit(1); |
| 255 |
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} |
| 256 |
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exit(0); |
| 257 |
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} |
| 258 |
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| 259 |
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| 260 |
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eputs(s) |
| 261 |
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char *s; |
| 262 |
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{ |
| 263 |
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fputs(s, stderr); |
| 264 |
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} |
| 265 |
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| 266 |
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| 267 |
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quit(code) |
| 268 |
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int code; |
| 269 |
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{ |
| 270 |
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exit(code); |
| 271 |
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} |
| 272 |
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| 273 |
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| 274 |
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getras() /* get raster file */ |
| 275 |
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{ |
| 276 |
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colormap ourmap; |
| 277 |
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unsigned char rmap[256], gmap[256], bmap[256]; |
| 278 |
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XVisualInfo vinfo; |
| 279 |
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register int i; |
| 280 |
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| 281 |
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if (maxcolors <= 2) { /* monochrome */ |
| 282 |
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ourdata = (unsigned char *)malloc(ymax*((xmax+7)/8)); |
| 283 |
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if (ourdata == NULL) |
| 284 |
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goto fail; |
| 285 |
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ourras = make_raster(thedisplay, ourscreen, 1, ourdata, |
| 286 |
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xmax, ymax, 8); |
| 287 |
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if (ourras == NULL) |
| 288 |
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goto fail; |
| 289 |
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getmono(); |
| 290 |
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} else if (XMatchVisualInfo(thedisplay,ourscreen,24,TrueColor,&vinfo)) { |
| 291 |
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ourdata = (unsigned char *)malloc(xmax*ymax*3); |
| 292 |
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if (ourdata == NULL) |
| 293 |
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goto fail; |
| 294 |
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ourras = make_raster(thedisplay, ourscreen, 24, ourdata, |
| 295 |
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xmax, ymax, 8); |
| 296 |
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if (ourras == NULL) |
| 297 |
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goto fail; |
| 298 |
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getfull(); |
| 299 |
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} else { |
| 300 |
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ourdata = (unsigned char *)malloc(xmax*ymax); |
| 301 |
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if (ourdata == NULL) |
| 302 |
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goto fail; |
| 303 |
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ourras = make_raster(thedisplay, ourscreen, 8, ourdata, |
| 304 |
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xmax, ymax, 8); |
| 305 |
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if (ourras == NULL) |
| 306 |
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goto fail; |
| 307 |
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if (greyscale) |
| 308 |
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biq(dither,maxcolors,1,ourmap); |
| 309 |
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else |
| 310 |
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ciq(dither,maxcolors,1,ourmap); |
| 311 |
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for (i = 0; i < 256; i++) { |
| 312 |
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rmap[i] = ourmap[0][i]; |
| 313 |
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gmap[i] = ourmap[1][i]; |
| 314 |
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bmap[i] = ourmap[2][i]; |
| 315 |
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} |
| 316 |
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if (init_rcolors(ourras, rmap, gmap, bmap) == 0) |
| 317 |
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goto fail; |
| 318 |
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} |
| 319 |
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return; |
| 320 |
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fail: |
| 321 |
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quit("could not create raster image"); |
| 322 |
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} |
| 323 |
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| 324 |
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| 325 |
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getevent() /* process the next event */ |
| 326 |
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{ |
| 327 |
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union { |
| 328 |
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XEvent u; |
| 329 |
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XConfigureEvent c; |
| 330 |
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XExposeEvent e; |
| 331 |
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XButtonPressedEvent b; |
| 332 |
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XKeyPressedEvent k; |
| 333 |
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} e; |
| 334 |
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| 335 |
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XNextEvent(thedisplay, &e.u); |
| 336 |
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switch (e.u.type) { |
| 337 |
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case KeyPress: |
| 338 |
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docom(&e.k); |
| 339 |
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break; |
| 340 |
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case ConfigureNotify: |
| 341 |
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width = e.c.width; |
| 342 |
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height = e.c.height; |
| 343 |
|
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break; |
| 344 |
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case MapNotify: |
| 345 |
|
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map_rcolors(ourras, wind); |
| 346 |
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if (fast) |
| 347 |
|
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make_rpixmap(ourras); |
| 348 |
|
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break; |
| 349 |
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case UnmapNotify: |
| 350 |
|
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unmap_rcolors(ourras); |
| 351 |
|
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break; |
| 352 |
|
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case Expose: |
| 353 |
|
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redraw(e.e.x, e.e.y, e.e.width, e.e.height); |
| 354 |
|
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break; |
| 355 |
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case ButtonPress: |
| 356 |
|
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if (e.b.state & (ShiftMask|ControlMask)) |
| 357 |
|
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moveimage(&e.b); |
| 358 |
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else |
| 359 |
|
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getbox(&e.b); |
| 360 |
|
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break; |
| 361 |
|
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} |
| 362 |
|
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} |
| 363 |
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| 364 |
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| 365 |
|
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docom(ekey) /* execute command */ |
| 366 |
|
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XKeyPressedEvent *ekey; |
| 367 |
|
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{ |
| 368 |
|
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char buf[80]; |
| 369 |
|
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COLOR cval; |
| 370 |
|
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XColor cvx; |
| 371 |
|
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int com, n; |
| 372 |
|
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double comp; |
| 373 |
|
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FVECT rorg, rdir; |
| 374 |
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| 375 |
|
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n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
| 376 |
|
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if (n == 0) |
| 377 |
|
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return(0); |
| 378 |
|
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com = buf[0]; |
| 379 |
|
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switch (com) { /* interpret command */ |
| 380 |
|
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case 'q': |
| 381 |
|
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case CTRL(D): /* quit */ |
| 382 |
|
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quit(0); |
| 383 |
|
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case '\n': |
| 384 |
|
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case '\r': |
| 385 |
|
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case 'l': |
| 386 |
|
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case 'c': /* value */ |
| 387 |
|
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if (avgbox(cval) == -1) |
| 388 |
|
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return(-1); |
| 389 |
|
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switch (com) { |
| 390 |
|
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case '\n': |
| 391 |
|
|
case '\r': /* radiance */ |
| 392 |
|
|
sprintf(buf, "%.3f", intens(cval)/exposure); |
| 393 |
|
|
break; |
| 394 |
|
|
case 'l': /* luminance */ |
| 395 |
|
|
sprintf(buf, "%.0fn", bright(cval)*683.0/exposure); |
| 396 |
|
|
break; |
| 397 |
|
|
case 'c': /* color */ |
| 398 |
|
|
comp = pow(2.0, (double)scale); |
| 399 |
|
|
sprintf(buf, "(%.2f,%.2f,%.2f)", |
| 400 |
|
|
colval(cval,RED)*comp, |
| 401 |
|
|
colval(cval,GRN)*comp, |
| 402 |
|
|
colval(cval,BLU)*comp); |
| 403 |
|
|
break; |
| 404 |
|
|
} |
| 405 |
|
|
XDrawImageString(thedisplay, wind, ourgc, box.xmin, box.ymin, |
| 406 |
|
|
buf, strlen(buf)); |
| 407 |
|
|
return(0); |
| 408 |
|
|
case 'i': /* identify (contour) */ |
| 409 |
|
|
if (ourras->pixels == NULL) |
| 410 |
|
|
return(-1); |
| 411 |
|
|
n = ourdata[ekey->x-xoff+xmax*(ekey->y-yoff)]; |
| 412 |
|
|
n = ourras->pmap[n]; |
| 413 |
|
|
cvx.pixel = ourras->cdefs[n].pixel; |
| 414 |
|
|
cvx.red = random() & 65535; |
| 415 |
|
|
cvx.green = random() & 65535; |
| 416 |
|
|
cvx.blue = random() & 65535; |
| 417 |
greg |
1.2 |
cvx.flags = DoRed|DoGreen|DoBlue; |
| 418 |
|
|
XStoreColor(thedisplay, ourras->cmap, &cvx); |
| 419 |
greg |
1.1 |
return(0); |
| 420 |
|
|
case 'p': /* position */ |
| 421 |
|
|
sprintf(buf, "(%d,%d)", ekey->x-xoff, ymax-1-ekey->y+yoff); |
| 422 |
|
|
XDrawImageString(thedisplay, wind, ourgc, ekey->x, ekey->y, |
| 423 |
|
|
buf, strlen(buf)); |
| 424 |
|
|
return(0); |
| 425 |
|
|
case 't': /* trace */ |
| 426 |
|
|
if (!gotview) { |
| 427 |
|
|
XBell(thedisplay, 0); |
| 428 |
|
|
return(-1); |
| 429 |
|
|
} |
| 430 |
|
|
viewray(rorg, rdir, &ourview, |
| 431 |
|
|
(ekey->x-xoff+.5)/xmax, |
| 432 |
|
|
(ymax-1-ekey->y+yoff+.5)/ymax); |
| 433 |
|
|
printf("%e %e %e ", rorg[0], rorg[1], rorg[2]); |
| 434 |
|
|
printf("%e %e %e\n", rdir[0], rdir[1], rdir[2]); |
| 435 |
|
|
fflush(stdout); |
| 436 |
|
|
return(0); |
| 437 |
|
|
case '=': /* adjust exposure */ |
| 438 |
|
|
if (avgbox(cval) == -1) |
| 439 |
|
|
return(-1); |
| 440 |
|
|
n = log(.5/bright(cval))/.69315 - scale; /* truncate */ |
| 441 |
|
|
if (n == 0) |
| 442 |
|
|
return(0); |
| 443 |
|
|
scale_rcolors(ourras, pow(2.0, (double)n)); |
| 444 |
|
|
scale += n; |
| 445 |
|
|
sprintf(buf, "%+d", scale); |
| 446 |
|
|
XDrawImageString(thedisplay, wind, ourgc, box.xmin, box.ymin, |
| 447 |
|
|
buf, strlen(buf)); |
| 448 |
|
|
XFlush(thedisplay); |
| 449 |
|
|
free(ourdata); |
| 450 |
|
|
free_raster(ourras); |
| 451 |
|
|
getras(); |
| 452 |
|
|
/* fall through */ |
| 453 |
|
|
case CTRL(R): /* redraw */ |
| 454 |
|
|
case CTRL(L): |
| 455 |
|
|
unmap_rcolors(ourras); |
| 456 |
|
|
XClearWindow(thedisplay, wind); |
| 457 |
|
|
map_rcolors(ourras, wind); |
| 458 |
|
|
if (fast) |
| 459 |
|
|
make_rpixmap(ourras); |
| 460 |
|
|
redraw(0, 0, width, height); |
| 461 |
|
|
return(0); |
| 462 |
|
|
case ' ': /* clear */ |
| 463 |
|
|
redraw(box.xmin, box.ymin, box.xsiz, box.ysiz); |
| 464 |
|
|
return(0); |
| 465 |
|
|
default: |
| 466 |
greg |
1.2 |
XBell(thedisplay, 0); |
| 467 |
greg |
1.1 |
return(-1); |
| 468 |
|
|
} |
| 469 |
|
|
} |
| 470 |
|
|
|
| 471 |
|
|
|
| 472 |
greg |
1.2 |
moveimage(ebut) /* shift the image */ |
| 473 |
|
|
XButtonPressedEvent *ebut; |
| 474 |
greg |
1.1 |
{ |
| 475 |
greg |
1.2 |
union { |
| 476 |
|
|
XEvent u; |
| 477 |
|
|
XButtonReleasedEvent b; |
| 478 |
|
|
} e; |
| 479 |
greg |
1.1 |
|
| 480 |
greg |
1.2 |
XMaskEvent(thedisplay, ButtonReleaseMask, &e.u); |
| 481 |
|
|
xoff += e.b.x - ebut->x; |
| 482 |
|
|
yoff += e.b.y - ebut->y; |
| 483 |
greg |
1.1 |
XClearWindow(thedisplay, wind); |
| 484 |
|
|
redraw(0, 0, width, height); |
| 485 |
|
|
} |
| 486 |
|
|
|
| 487 |
|
|
|
| 488 |
|
|
getbox(ebut) /* get new box */ |
| 489 |
|
|
XButtonPressedEvent *ebut; |
| 490 |
|
|
{ |
| 491 |
|
|
union { |
| 492 |
greg |
1.2 |
XEvent u; |
| 493 |
greg |
1.1 |
XButtonReleasedEvent b; |
| 494 |
|
|
XPointerMovedEvent m; |
| 495 |
|
|
} e; |
| 496 |
|
|
|
| 497 |
greg |
1.2 |
XMaskEvent(thedisplay, ButtonReleaseMask|ButtonMotionMask, &e.u); |
| 498 |
|
|
while (e.u.type == MotionNotify) { |
| 499 |
greg |
1.1 |
revbox(ebut->x, ebut->y, box.xmin = e.m.x, box.ymin = e.m.y); |
| 500 |
greg |
1.2 |
XMaskEvent(thedisplay,ButtonReleaseMask|ButtonMotionMask,&e.u); |
| 501 |
greg |
1.1 |
revbox(ebut->x, ebut->y, box.xmin, box.ymin); |
| 502 |
|
|
} |
| 503 |
|
|
box.xmin = e.b.x<0 ? 0 : (e.b.x>=width ? width-1 : e.b.x); |
| 504 |
|
|
box.ymin = e.b.y<0 ? 0 : (e.b.y>=height ? height-1 : e.b.y); |
| 505 |
|
|
if (box.xmin > ebut->x) { |
| 506 |
|
|
box.xsiz = box.xmin - ebut->x + 1; |
| 507 |
|
|
box.xmin = ebut->x; |
| 508 |
|
|
} else { |
| 509 |
|
|
box.xsiz = ebut->x - box.xmin + 1; |
| 510 |
|
|
} |
| 511 |
|
|
if (box.ymin > ebut->y) { |
| 512 |
|
|
box.ysiz = box.ymin - ebut->y + 1; |
| 513 |
|
|
box.ymin = ebut->y; |
| 514 |
|
|
} else { |
| 515 |
|
|
box.ysiz = ebut->y - box.ymin + 1; |
| 516 |
|
|
} |
| 517 |
|
|
} |
| 518 |
|
|
|
| 519 |
|
|
|
| 520 |
|
|
revbox(x0, y0, x1, y1) /* draw box with reversed lines */ |
| 521 |
|
|
int x0, y0, x1, y1; |
| 522 |
|
|
{ |
| 523 |
|
|
static GC mygc = 0; |
| 524 |
|
|
|
| 525 |
|
|
if (mygc == 0) { |
| 526 |
|
|
mygc = XCreateGC(thedisplay, wind, 0, 0); |
| 527 |
|
|
XSetFunction(thedisplay, mygc, GXinvert); |
| 528 |
|
|
} |
| 529 |
|
|
XDrawLine(thedisplay, wind, mygc, x0, y0, x1, y0); |
| 530 |
|
|
XDrawLine(thedisplay, wind, mygc, x0, y1, x1, y1); |
| 531 |
|
|
XDrawLine(thedisplay, wind, mygc, x0, y0, x0, y1); |
| 532 |
|
|
XDrawLine(thedisplay, wind, mygc, x1, y0, x1, y1); |
| 533 |
|
|
} /* end of revbox */ |
| 534 |
|
|
|
| 535 |
|
|
|
| 536 |
|
|
avgbox(clr) /* average color over current box */ |
| 537 |
|
|
COLOR clr; |
| 538 |
|
|
{ |
| 539 |
|
|
int left, right, top, bottom; |
| 540 |
|
|
int y; |
| 541 |
|
|
double d; |
| 542 |
|
|
COLOR ctmp; |
| 543 |
|
|
register int x; |
| 544 |
|
|
|
| 545 |
|
|
setcolor(clr, 0.0, 0.0, 0.0); |
| 546 |
|
|
left = box.xmin - xoff; |
| 547 |
|
|
right = left + box.xsiz; |
| 548 |
|
|
if (left < 0) |
| 549 |
|
|
left = 0; |
| 550 |
|
|
if (right > xmax) |
| 551 |
|
|
right = xmax; |
| 552 |
|
|
if (left >= right) |
| 553 |
|
|
return(-1); |
| 554 |
|
|
top = box.ymin - yoff; |
| 555 |
|
|
bottom = top + box.ysiz; |
| 556 |
|
|
if (top < 0) |
| 557 |
|
|
top = 0; |
| 558 |
|
|
if (bottom > ymax) |
| 559 |
|
|
bottom = ymax; |
| 560 |
|
|
if (top >= bottom) |
| 561 |
|
|
return(-1); |
| 562 |
|
|
for (y = top; y < bottom; y++) { |
| 563 |
|
|
if (getscan(y) == -1) |
| 564 |
|
|
return(-1); |
| 565 |
|
|
for (x = left; x < right; x++) { |
| 566 |
|
|
colr_color(ctmp, scanline[x]); |
| 567 |
|
|
addcolor(clr, ctmp); |
| 568 |
|
|
} |
| 569 |
|
|
} |
| 570 |
|
|
d = 1.0/((right-left)*(bottom-top)); |
| 571 |
|
|
scalecolor(clr, d); |
| 572 |
|
|
return(0); |
| 573 |
|
|
} |
| 574 |
|
|
|
| 575 |
|
|
|
| 576 |
|
|
getmono() /* get monochrome data */ |
| 577 |
|
|
{ |
| 578 |
|
|
register unsigned char *dp; |
| 579 |
|
|
register int x, err; |
| 580 |
|
|
int y; |
| 581 |
|
|
rgbpixel *inline; |
| 582 |
|
|
short *cerr; |
| 583 |
|
|
|
| 584 |
|
|
if ((inline = (rgbpixel *)malloc(xmax*sizeof(rgbpixel))) == NULL |
| 585 |
|
|
|| (cerr = (short *)calloc(xmax,sizeof(short))) == NULL) |
| 586 |
|
|
quit("out of memory in getmono"); |
| 587 |
|
|
dp = ourdata - 1; |
| 588 |
|
|
for (y = 0; y < ymax; y++) { |
| 589 |
|
|
picreadline3(y, inline); |
| 590 |
|
|
err = 0; |
| 591 |
|
|
for (x = 0; x < xmax; x++) { |
| 592 |
|
|
if (!(x&7)) |
| 593 |
|
|
*++dp = 0; |
| 594 |
|
|
err += rgb_bright(&inline[x]) + cerr[x]; |
| 595 |
|
|
if (err > 127) |
| 596 |
|
|
err -= 255; |
| 597 |
|
|
else |
| 598 |
|
|
*dp |= 1<<(x&07); |
| 599 |
|
|
cerr[x] = err >>= 1; |
| 600 |
|
|
} |
| 601 |
|
|
} |
| 602 |
|
|
free((char *)inline); |
| 603 |
|
|
free((char *)cerr); |
| 604 |
|
|
} |
| 605 |
|
|
|
| 606 |
|
|
|
| 607 |
|
|
getfull() /* get full (24-bit) data */ |
| 608 |
|
|
{ |
| 609 |
|
|
int y; |
| 610 |
|
|
|
| 611 |
|
|
for (y = 0; y < ymax; y++) |
| 612 |
|
|
picreadline3(y, (rgbpixel *)(ourdata+y*xmax*3)); |
| 613 |
|
|
} |
| 614 |
|
|
|
| 615 |
|
|
|
| 616 |
|
|
scale_rcolors(xr, sf) /* scale color map */ |
| 617 |
|
|
register XRASTER *xr; |
| 618 |
|
|
double sf; |
| 619 |
|
|
{ |
| 620 |
|
|
register int i; |
| 621 |
|
|
long maxv; |
| 622 |
|
|
|
| 623 |
|
|
if (xr->pixels == NULL) |
| 624 |
|
|
return; |
| 625 |
|
|
|
| 626 |
|
|
sf = pow(sf, 1.0/gamcor); |
| 627 |
|
|
maxv = 65535/sf; |
| 628 |
|
|
|
| 629 |
|
|
for (i = xr->ncolors; i--; ) { |
| 630 |
|
|
xr->cdefs[i].red = xr->cdefs[i].red > maxv ? |
| 631 |
|
|
65535 : |
| 632 |
|
|
xr->cdefs[i].red * sf; |
| 633 |
|
|
xr->cdefs[i].green = xr->cdefs[i].green > maxv ? |
| 634 |
|
|
65535 : |
| 635 |
|
|
xr->cdefs[i].green * sf; |
| 636 |
|
|
xr->cdefs[i].blue = xr->cdefs[i].blue > maxv ? |
| 637 |
|
|
65535 : |
| 638 |
|
|
xr->cdefs[i].blue * sf; |
| 639 |
|
|
} |
| 640 |
|
|
XStoreColors(thedisplay, xr->cmap, xr->cdefs, xr->ncolors); |
| 641 |
|
|
} |
| 642 |
|
|
|
| 643 |
|
|
|
| 644 |
|
|
getscan(y) |
| 645 |
|
|
int y; |
| 646 |
|
|
{ |
| 647 |
|
|
if (y != cury) { |
| 648 |
|
|
if (scanpos == NULL || scanpos[y] == -1) |
| 649 |
|
|
return(-1); |
| 650 |
|
|
if (fseek(fin, scanpos[y], 0) == -1) |
| 651 |
|
|
quit("fseek error"); |
| 652 |
|
|
cury = y; |
| 653 |
|
|
} else if (scanpos != NULL) |
| 654 |
|
|
scanpos[y] = ftell(fin); |
| 655 |
|
|
|
| 656 |
|
|
if (freadcolrs(scanline, xmax, fin) < 0) |
| 657 |
|
|
quiterr("read error"); |
| 658 |
|
|
|
| 659 |
|
|
cury++; |
| 660 |
|
|
return(0); |
| 661 |
|
|
} |
| 662 |
|
|
|
| 663 |
|
|
|
| 664 |
|
|
picreadline3(y, l3) /* read in 3-byte scanline */ |
| 665 |
|
|
int y; |
| 666 |
|
|
register rgbpixel *l3; |
| 667 |
|
|
{ |
| 668 |
|
|
register int i; |
| 669 |
|
|
/* read scanline */ |
| 670 |
|
|
if (getscan(y) < 0) |
| 671 |
|
|
quiterr("cannot seek for picreadline"); |
| 672 |
|
|
/* convert scanline */ |
| 673 |
|
|
normcolrs(scanline, xmax, scale); |
| 674 |
|
|
for (i = 0; i < xmax; i++) { |
| 675 |
|
|
l3[i].r = scanline[i][RED]; |
| 676 |
|
|
l3[i].g = scanline[i][GRN]; |
| 677 |
|
|
l3[i].b = scanline[i][BLU]; |
| 678 |
|
|
} |
| 679 |
|
|
} |
| 680 |
|
|
|
| 681 |
|
|
|
| 682 |
|
|
picwriteline(y, l) /* add 8-bit scanline to image */ |
| 683 |
|
|
int y; |
| 684 |
|
|
pixel *l; |
| 685 |
|
|
{ |
| 686 |
|
|
bcopy((char *)l, (char *)ourdata+y*xmax, xmax); |
| 687 |
|
|
} |
| 688 |
|
|
|
| 689 |
|
|
|
| 690 |
|
|
picreadcm(map) /* do gamma correction */ |
| 691 |
|
|
colormap map; |
| 692 |
|
|
{ |
| 693 |
|
|
extern double pow(); |
| 694 |
|
|
register int i, val; |
| 695 |
|
|
|
| 696 |
|
|
for (i = 0; i < 256; i++) { |
| 697 |
|
|
val = pow(i/256.0, 1.0/gamcor) * 256.0; |
| 698 |
|
|
map[0][i] = map[1][i] = map[2][i] = val; |
| 699 |
|
|
} |
| 700 |
|
|
} |
| 701 |
|
|
|
| 702 |
|
|
|
| 703 |
|
|
picwritecm(map) /* handled elsewhere */ |
| 704 |
|
|
colormap map; |
| 705 |
|
|
{ |
| 706 |
|
|
#ifdef DEBUG |
| 707 |
|
|
register int i; |
| 708 |
|
|
|
| 709 |
|
|
for (i = 0; i < 256; i++) |
| 710 |
|
|
printf("%d %d %d\n", map[0][i],map[1][i],map[2][i]); |
| 711 |
|
|
#endif |
| 712 |
|
|
} |
