1 |
greg |
1.1 |
/* Copyright (c) 1990 Regents of the University of California */ |
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#ifndef lint |
4 |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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7 |
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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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13 |
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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 |
19 |
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*/ |
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#include "standard.h" |
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24 |
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#include <X11/Xlib.h> |
25 |
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#include <X11/cursorfont.h> |
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#include <X11/Xutil.h> |
27 |
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28 |
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#include "color.h" |
29 |
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#include "view.h" |
30 |
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#include "pic.h" |
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#include "x11raster.h" |
32 |
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#include "random.h" |
33 |
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34 |
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#define FONTNAME "8x13" /* text font we'll use */ |
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36 |
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#define CTRL(c) ('c'-'@') |
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38 |
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#define BORWIDTH 5 /* border width */ |
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40 |
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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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46 |
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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48 |
greg |
1.1 |
double gamcor = 2.2; /* gamma correction */ |
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50 |
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int dither = 1; /* dither colors? */ |
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int fast = 0; /* keep picture in Pixmap? */ |
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53 |
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Window wind = 0; /* our output window */ |
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Font fontid; /* our font */ |
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56 |
greg |
1.2 |
int maxcolors = 0; /* maximum colors */ |
57 |
greg |
1.1 |
int greyscale = 0; /* in grey */ |
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59 |
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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; |
123 |
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case 'f': |
124 |
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fast = !fast; |
125 |
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break; |
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case 'e': |
127 |
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if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
128 |
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goto userr; |
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scale = atoi(argv[++i]); |
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break; |
131 |
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case 'g': |
132 |
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if (!strcmp(argv[i], "-geometry")) |
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geometry = argv[++i]; |
134 |
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else |
135 |
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gamcor = atof(argv[++i]); |
136 |
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break; |
137 |
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default: |
138 |
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goto userr; |
139 |
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} |
140 |
greg |
1.3 |
else if (argv[i][0] == '=') |
141 |
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geometry = argv[i]; |
142 |
greg |
1.1 |
else |
143 |
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break; |
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145 |
greg |
1.3 |
if (i == argc-1) { |
146 |
greg |
1.1 |
fname = argv[i]; |
147 |
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fin = fopen(fname, "r"); |
148 |
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if (fin == NULL) { |
149 |
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sprintf(errmsg, "can't open file \"%s\"", fname); |
150 |
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quiterr(errmsg); |
151 |
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} |
152 |
greg |
1.3 |
} else if (i != argc) |
153 |
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goto userr; |
154 |
greg |
1.1 |
/* get header */ |
155 |
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getheader(fin, headline); |
156 |
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/* get picture dimensions */ |
157 |
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if (fgetresolu(&xmax, &ymax, fin) != (YMAJOR|YDECR)) |
158 |
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quiterr("bad picture size"); |
159 |
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/* set view parameters */ |
160 |
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if (gotview && setview(&ourview) != NULL) |
161 |
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gotview = 0; |
162 |
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if ((scanline = (COLR *)malloc(xmax*sizeof(COLR))) == NULL) |
163 |
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quiterr("out of memory"); |
164 |
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165 |
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init(); /* get file and open window */ |
166 |
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167 |
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for ( ; ; ) |
168 |
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getevent(); /* main loop */ |
169 |
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userr: |
170 |
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fprintf(stderr, |
171 |
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"Usage: %s [-geometry spec][-b][-m][-d][-f][-c ncolors][-e +/-stops] file\n", |
172 |
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progname); |
173 |
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quit(1); |
174 |
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} |
175 |
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176 |
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177 |
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headline(s) /* get relevant info from header */ |
178 |
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char *s; |
179 |
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{ |
180 |
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static char *altname[] = {"rview","rpict","pinterp",VIEWSTR,NULL}; |
181 |
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register char **an; |
182 |
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183 |
greg |
1.2 |
if (isexpos(s)) |
184 |
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exposure *= exposval(s); |
185 |
greg |
1.1 |
else |
186 |
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for (an = altname; *an != NULL; an++) |
187 |
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if (!strncmp(*an, s, strlen(*an))) { |
188 |
greg |
1.2 |
if (sscanview(&ourview, s+strlen(*an)) > 0) |
189 |
greg |
1.1 |
gotview++; |
190 |
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return; |
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} |
192 |
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} |
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194 |
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195 |
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init() /* get data and open window */ |
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{ |
197 |
greg |
1.4 |
XSetWindowAttributes ourwinattr; |
198 |
greg |
1.1 |
XSizeHints oursizhints; |
199 |
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register int i; |
200 |
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201 |
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if (fname != NULL) { |
202 |
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scanpos = (long *)malloc(ymax*sizeof(long)); |
203 |
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if (scanpos == NULL) |
204 |
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goto memerr; |
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for (i = 0; i < ymax; i++) |
206 |
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scanpos[i] = -1; |
207 |
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} |
208 |
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if ((thedisplay = XOpenDisplay(NULL)) == NULL) |
209 |
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quiterr("can't open display; DISPLAY variable set?"); |
210 |
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if (maxcolors == 0) { /* get number of available colors */ |
211 |
greg |
1.2 |
i = DisplayPlanes(thedisplay,ourscreen); |
212 |
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maxcolors = i > 8 ? 256 : 1<<i; |
213 |
greg |
1.1 |
if (maxcolors > 4) maxcolors -= 2; |
214 |
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} |
215 |
greg |
1.4 |
/* store image */ |
216 |
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getras(); |
217 |
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/* open window */ |
218 |
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ourwinattr.border_pixel = ourblack; |
219 |
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ourwinattr.background_pixel = ourwhite; |
220 |
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wind = XCreateWindow(thedisplay, ourroot, 0, 0, xmax, ymax, BORWIDTH, |
221 |
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0, InputOutput, ourras->visual, |
222 |
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CWBackPixel|CWBorderPixel, &ourwinattr); |
223 |
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if (wind == 0) |
224 |
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quiterr("can't create window"); |
225 |
greg |
1.1 |
fontid = XLoadFont(thedisplay, FONTNAME); |
226 |
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if (fontid == 0) |
227 |
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quiterr("can't get font"); |
228 |
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XSetFont(thedisplay, ourgc, fontid); |
229 |
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XStoreName(thedisplay, wind, fname == NULL ? progname : fname); |
230 |
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XDefineCursor(thedisplay, wind, XCreateFontCursor(thedisplay, |
231 |
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XC_diamond_cross)); |
232 |
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if (geometry != NULL) { |
233 |
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bzero((char *)&oursizhints, sizeof(oursizhints)); |
234 |
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i = XParseGeometry(geometry, &oursizhints.x, &oursizhints.y, |
235 |
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&oursizhints.width, &oursizhints.height); |
236 |
greg |
1.3 |
if ((i&(WidthValue|HeightValue)) == (WidthValue|HeightValue)) |
237 |
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oursizhints.flags |= USSize; |
238 |
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else { |
239 |
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oursizhints.width = xmax; |
240 |
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oursizhints.height = ymax; |
241 |
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oursizhints.flags |= PSize; |
242 |
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} |
243 |
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if ((i&(XValue|YValue)) == (XValue|YValue)) { |
244 |
greg |
1.1 |
oursizhints.flags |= USPosition; |
245 |
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if (i & XNegative) |
246 |
greg |
1.3 |
oursizhints.x += DisplayWidth(thedisplay, |
247 |
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ourscreen)-1-oursizhints.width-2*BORWIDTH; |
248 |
greg |
1.1 |
if (i & YNegative) |
249 |
greg |
1.3 |
oursizhints.y += DisplayHeight(thedisplay, |
250 |
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ourscreen)-1-oursizhints.height-2*BORWIDTH; |
251 |
greg |
1.1 |
} |
252 |
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XSetNormalHints(thedisplay, wind, &oursizhints); |
253 |
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} |
254 |
greg |
1.2 |
XSelectInput(thedisplay, wind, ButtonPressMask|ButtonReleaseMask |
255 |
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|ButtonMotionMask|StructureNotifyMask |
256 |
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|KeyPressMask|ExposureMask); |
257 |
greg |
1.1 |
XMapWindow(thedisplay, wind); |
258 |
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return; |
259 |
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memerr: |
260 |
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quiterr("out of memory"); |
261 |
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} /* end of init */ |
262 |
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263 |
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264 |
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quiterr(err) /* print message and exit */ |
265 |
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char *err; |
266 |
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{ |
267 |
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if (err != NULL) { |
268 |
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fprintf(stderr, "%s: %s\n", progname, err); |
269 |
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exit(1); |
270 |
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} |
271 |
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exit(0); |
272 |
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} |
273 |
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274 |
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275 |
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eputs(s) |
276 |
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char *s; |
277 |
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{ |
278 |
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fputs(s, stderr); |
279 |
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} |
280 |
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281 |
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282 |
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quit(code) |
283 |
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int code; |
284 |
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{ |
285 |
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exit(code); |
286 |
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} |
287 |
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288 |
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289 |
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getras() /* get raster file */ |
290 |
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{ |
291 |
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colormap ourmap; |
292 |
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XVisualInfo vinfo; |
293 |
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294 |
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if (maxcolors <= 2) { /* monochrome */ |
295 |
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ourdata = (unsigned char *)malloc(ymax*((xmax+7)/8)); |
296 |
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if (ourdata == NULL) |
297 |
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goto fail; |
298 |
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ourras = make_raster(thedisplay, ourscreen, 1, ourdata, |
299 |
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xmax, ymax, 8); |
300 |
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if (ourras == NULL) |
301 |
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goto fail; |
302 |
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getmono(); |
303 |
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} else if (XMatchVisualInfo(thedisplay,ourscreen,24,TrueColor,&vinfo)) { |
304 |
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ourdata = (unsigned char *)malloc(xmax*ymax*3); |
305 |
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if (ourdata == NULL) |
306 |
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goto fail; |
307 |
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ourras = make_raster(thedisplay, ourscreen, 24, ourdata, |
308 |
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xmax, ymax, 8); |
309 |
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if (ourras == NULL) |
310 |
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goto fail; |
311 |
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getfull(); |
312 |
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} else { |
313 |
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ourdata = (unsigned char *)malloc(xmax*ymax); |
314 |
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if (ourdata == NULL) |
315 |
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goto fail; |
316 |
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ourras = make_raster(thedisplay, ourscreen, 8, ourdata, |
317 |
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xmax, ymax, 8); |
318 |
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if (ourras == NULL) |
319 |
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goto fail; |
320 |
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if (greyscale) |
321 |
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biq(dither,maxcolors,1,ourmap); |
322 |
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else |
323 |
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ciq(dither,maxcolors,1,ourmap); |
324 |
greg |
1.3 |
if (init_rcolors(ourras, ourmap[0], ourmap[1], ourmap[2]) == 0) |
325 |
greg |
1.1 |
goto fail; |
326 |
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} |
327 |
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return; |
328 |
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fail: |
329 |
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quit("could not create raster image"); |
330 |
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} |
331 |
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332 |
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333 |
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getevent() /* process the next event */ |
334 |
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{ |
335 |
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union { |
336 |
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XEvent u; |
337 |
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XConfigureEvent c; |
338 |
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XExposeEvent e; |
339 |
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XButtonPressedEvent b; |
340 |
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XKeyPressedEvent k; |
341 |
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} e; |
342 |
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343 |
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XNextEvent(thedisplay, &e.u); |
344 |
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switch (e.u.type) { |
345 |
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case KeyPress: |
346 |
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docom(&e.k); |
347 |
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break; |
348 |
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case ConfigureNotify: |
349 |
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width = e.c.width; |
350 |
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height = e.c.height; |
351 |
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break; |
352 |
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case MapNotify: |
353 |
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map_rcolors(ourras, wind); |
354 |
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if (fast) |
355 |
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make_rpixmap(ourras); |
356 |
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break; |
357 |
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case UnmapNotify: |
358 |
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unmap_rcolors(ourras); |
359 |
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break; |
360 |
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case Expose: |
361 |
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redraw(e.e.x, e.e.y, e.e.width, e.e.height); |
362 |
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break; |
363 |
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case ButtonPress: |
364 |
|
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if (e.b.state & (ShiftMask|ControlMask)) |
365 |
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moveimage(&e.b); |
366 |
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else |
367 |
|
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getbox(&e.b); |
368 |
|
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break; |
369 |
|
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} |
370 |
|
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} |
371 |
|
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|
372 |
|
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|
373 |
|
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docom(ekey) /* execute command */ |
374 |
|
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XKeyPressedEvent *ekey; |
375 |
|
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{ |
376 |
|
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char buf[80]; |
377 |
|
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COLOR cval; |
378 |
|
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XColor cvx; |
379 |
|
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int com, n; |
380 |
|
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double comp; |
381 |
|
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FVECT rorg, rdir; |
382 |
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383 |
|
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n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
384 |
|
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if (n == 0) |
385 |
|
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return(0); |
386 |
|
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com = buf[0]; |
387 |
|
|
switch (com) { /* interpret command */ |
388 |
|
|
case 'q': |
389 |
|
|
case CTRL(D): /* quit */ |
390 |
|
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quit(0); |
391 |
|
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case '\n': |
392 |
|
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case '\r': |
393 |
|
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case 'l': |
394 |
|
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case 'c': /* value */ |
395 |
|
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if (avgbox(cval) == -1) |
396 |
|
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return(-1); |
397 |
|
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switch (com) { |
398 |
|
|
case '\n': |
399 |
|
|
case '\r': /* radiance */ |
400 |
|
|
sprintf(buf, "%.3f", intens(cval)/exposure); |
401 |
|
|
break; |
402 |
|
|
case 'l': /* luminance */ |
403 |
|
|
sprintf(buf, "%.0fn", bright(cval)*683.0/exposure); |
404 |
|
|
break; |
405 |
|
|
case 'c': /* color */ |
406 |
|
|
comp = pow(2.0, (double)scale); |
407 |
|
|
sprintf(buf, "(%.2f,%.2f,%.2f)", |
408 |
|
|
colval(cval,RED)*comp, |
409 |
|
|
colval(cval,GRN)*comp, |
410 |
|
|
colval(cval,BLU)*comp); |
411 |
|
|
break; |
412 |
|
|
} |
413 |
greg |
1.3 |
XDrawImageString(thedisplay, wind, ourgc, |
414 |
|
|
box.xmin, box.ymin+box.ysiz, buf, strlen(buf)); |
415 |
greg |
1.1 |
return(0); |
416 |
|
|
case 'i': /* identify (contour) */ |
417 |
|
|
if (ourras->pixels == NULL) |
418 |
|
|
return(-1); |
419 |
|
|
n = ourdata[ekey->x-xoff+xmax*(ekey->y-yoff)]; |
420 |
|
|
n = ourras->pmap[n]; |
421 |
|
|
cvx.pixel = ourras->cdefs[n].pixel; |
422 |
|
|
cvx.red = random() & 65535; |
423 |
|
|
cvx.green = random() & 65535; |
424 |
|
|
cvx.blue = random() & 65535; |
425 |
greg |
1.2 |
cvx.flags = DoRed|DoGreen|DoBlue; |
426 |
|
|
XStoreColor(thedisplay, ourras->cmap, &cvx); |
427 |
greg |
1.1 |
return(0); |
428 |
|
|
case 'p': /* position */ |
429 |
|
|
sprintf(buf, "(%d,%d)", ekey->x-xoff, ymax-1-ekey->y+yoff); |
430 |
|
|
XDrawImageString(thedisplay, wind, ourgc, ekey->x, ekey->y, |
431 |
|
|
buf, strlen(buf)); |
432 |
|
|
return(0); |
433 |
|
|
case 't': /* trace */ |
434 |
|
|
if (!gotview) { |
435 |
|
|
XBell(thedisplay, 0); |
436 |
|
|
return(-1); |
437 |
|
|
} |
438 |
|
|
viewray(rorg, rdir, &ourview, |
439 |
|
|
(ekey->x-xoff+.5)/xmax, |
440 |
|
|
(ymax-1-ekey->y+yoff+.5)/ymax); |
441 |
|
|
printf("%e %e %e ", rorg[0], rorg[1], rorg[2]); |
442 |
|
|
printf("%e %e %e\n", rdir[0], rdir[1], rdir[2]); |
443 |
|
|
fflush(stdout); |
444 |
|
|
return(0); |
445 |
|
|
case '=': /* adjust exposure */ |
446 |
|
|
if (avgbox(cval) == -1) |
447 |
|
|
return(-1); |
448 |
|
|
n = log(.5/bright(cval))/.69315 - scale; /* truncate */ |
449 |
|
|
if (n == 0) |
450 |
|
|
return(0); |
451 |
|
|
scale_rcolors(ourras, pow(2.0, (double)n)); |
452 |
|
|
scale += n; |
453 |
|
|
sprintf(buf, "%+d", scale); |
454 |
greg |
1.3 |
XDrawImageString(thedisplay, wind, ourgc, |
455 |
|
|
box.xmin, box.ymin+box.ysiz, buf, strlen(buf)); |
456 |
greg |
1.1 |
XFlush(thedisplay); |
457 |
|
|
free(ourdata); |
458 |
|
|
free_raster(ourras); |
459 |
|
|
getras(); |
460 |
|
|
/* fall through */ |
461 |
|
|
case CTRL(R): /* redraw */ |
462 |
|
|
case CTRL(L): |
463 |
|
|
unmap_rcolors(ourras); |
464 |
|
|
XClearWindow(thedisplay, wind); |
465 |
|
|
map_rcolors(ourras, wind); |
466 |
|
|
if (fast) |
467 |
|
|
make_rpixmap(ourras); |
468 |
|
|
redraw(0, 0, width, height); |
469 |
|
|
return(0); |
470 |
|
|
case ' ': /* clear */ |
471 |
|
|
redraw(box.xmin, box.ymin, box.xsiz, box.ysiz); |
472 |
|
|
return(0); |
473 |
|
|
default: |
474 |
greg |
1.2 |
XBell(thedisplay, 0); |
475 |
greg |
1.1 |
return(-1); |
476 |
|
|
} |
477 |
|
|
} |
478 |
|
|
|
479 |
|
|
|
480 |
greg |
1.2 |
moveimage(ebut) /* shift the image */ |
481 |
|
|
XButtonPressedEvent *ebut; |
482 |
greg |
1.1 |
{ |
483 |
greg |
1.2 |
union { |
484 |
greg |
1.3 |
XEvent u; |
485 |
|
|
XButtonReleasedEvent b; |
486 |
|
|
XPointerMovedEvent m; |
487 |
|
|
} e; |
488 |
|
|
int nxo, nyo; |
489 |
greg |
1.1 |
|
490 |
greg |
1.3 |
XMaskEvent(thedisplay, ButtonReleaseMask|ButtonMotionMask, &e.u); |
491 |
|
|
while (e.u.type == MotionNotify) { |
492 |
|
|
nxo = xoff + e.m.x - ebut->x; |
493 |
|
|
nyo = yoff + e.m.y - ebut->y; |
494 |
|
|
revbox(nxo, nyo, nxo+xmax, nyo+ymax); |
495 |
|
|
XMaskEvent(thedisplay,ButtonReleaseMask|ButtonMotionMask,&e.u); |
496 |
|
|
revbox(nxo, nyo, nxo+xmax, nyo+ymax); |
497 |
|
|
} |
498 |
greg |
1.2 |
xoff += e.b.x - ebut->x; |
499 |
|
|
yoff += e.b.y - ebut->y; |
500 |
greg |
1.1 |
XClearWindow(thedisplay, wind); |
501 |
|
|
redraw(0, 0, width, height); |
502 |
|
|
} |
503 |
|
|
|
504 |
|
|
|
505 |
|
|
getbox(ebut) /* get new box */ |
506 |
|
|
XButtonPressedEvent *ebut; |
507 |
|
|
{ |
508 |
|
|
union { |
509 |
greg |
1.2 |
XEvent u; |
510 |
greg |
1.1 |
XButtonReleasedEvent b; |
511 |
|
|
XPointerMovedEvent m; |
512 |
|
|
} e; |
513 |
|
|
|
514 |
greg |
1.2 |
XMaskEvent(thedisplay, ButtonReleaseMask|ButtonMotionMask, &e.u); |
515 |
|
|
while (e.u.type == MotionNotify) { |
516 |
greg |
1.1 |
revbox(ebut->x, ebut->y, box.xmin = e.m.x, box.ymin = e.m.y); |
517 |
greg |
1.2 |
XMaskEvent(thedisplay,ButtonReleaseMask|ButtonMotionMask,&e.u); |
518 |
greg |
1.1 |
revbox(ebut->x, ebut->y, box.xmin, box.ymin); |
519 |
|
|
} |
520 |
|
|
box.xmin = e.b.x<0 ? 0 : (e.b.x>=width ? width-1 : e.b.x); |
521 |
|
|
box.ymin = e.b.y<0 ? 0 : (e.b.y>=height ? height-1 : e.b.y); |
522 |
|
|
if (box.xmin > ebut->x) { |
523 |
|
|
box.xsiz = box.xmin - ebut->x + 1; |
524 |
|
|
box.xmin = ebut->x; |
525 |
|
|
} else { |
526 |
|
|
box.xsiz = ebut->x - box.xmin + 1; |
527 |
|
|
} |
528 |
|
|
if (box.ymin > ebut->y) { |
529 |
|
|
box.ysiz = box.ymin - ebut->y + 1; |
530 |
|
|
box.ymin = ebut->y; |
531 |
|
|
} else { |
532 |
|
|
box.ysiz = ebut->y - box.ymin + 1; |
533 |
|
|
} |
534 |
|
|
} |
535 |
|
|
|
536 |
|
|
|
537 |
|
|
revbox(x0, y0, x1, y1) /* draw box with reversed lines */ |
538 |
|
|
int x0, y0, x1, y1; |
539 |
|
|
{ |
540 |
|
|
static GC mygc = 0; |
541 |
|
|
|
542 |
|
|
if (mygc == 0) { |
543 |
|
|
mygc = XCreateGC(thedisplay, wind, 0, 0); |
544 |
|
|
XSetFunction(thedisplay, mygc, GXinvert); |
545 |
|
|
} |
546 |
|
|
XDrawLine(thedisplay, wind, mygc, x0, y0, x1, y0); |
547 |
|
|
XDrawLine(thedisplay, wind, mygc, x0, y1, x1, y1); |
548 |
|
|
XDrawLine(thedisplay, wind, mygc, x0, y0, x0, y1); |
549 |
|
|
XDrawLine(thedisplay, wind, mygc, x1, y0, x1, y1); |
550 |
|
|
} /* end of revbox */ |
551 |
|
|
|
552 |
|
|
|
553 |
|
|
avgbox(clr) /* average color over current box */ |
554 |
|
|
COLOR clr; |
555 |
|
|
{ |
556 |
|
|
int left, right, top, bottom; |
557 |
|
|
int y; |
558 |
|
|
double d; |
559 |
|
|
COLOR ctmp; |
560 |
|
|
register int x; |
561 |
|
|
|
562 |
|
|
setcolor(clr, 0.0, 0.0, 0.0); |
563 |
|
|
left = box.xmin - xoff; |
564 |
|
|
right = left + box.xsiz; |
565 |
|
|
if (left < 0) |
566 |
|
|
left = 0; |
567 |
|
|
if (right > xmax) |
568 |
|
|
right = xmax; |
569 |
|
|
if (left >= right) |
570 |
|
|
return(-1); |
571 |
|
|
top = box.ymin - yoff; |
572 |
|
|
bottom = top + box.ysiz; |
573 |
|
|
if (top < 0) |
574 |
|
|
top = 0; |
575 |
|
|
if (bottom > ymax) |
576 |
|
|
bottom = ymax; |
577 |
|
|
if (top >= bottom) |
578 |
|
|
return(-1); |
579 |
|
|
for (y = top; y < bottom; y++) { |
580 |
|
|
if (getscan(y) == -1) |
581 |
|
|
return(-1); |
582 |
|
|
for (x = left; x < right; x++) { |
583 |
|
|
colr_color(ctmp, scanline[x]); |
584 |
|
|
addcolor(clr, ctmp); |
585 |
|
|
} |
586 |
|
|
} |
587 |
|
|
d = 1.0/((right-left)*(bottom-top)); |
588 |
|
|
scalecolor(clr, d); |
589 |
|
|
return(0); |
590 |
|
|
} |
591 |
|
|
|
592 |
|
|
|
593 |
|
|
getmono() /* get monochrome data */ |
594 |
|
|
{ |
595 |
|
|
register unsigned char *dp; |
596 |
|
|
register int x, err; |
597 |
|
|
int y; |
598 |
|
|
rgbpixel *inline; |
599 |
|
|
short *cerr; |
600 |
|
|
|
601 |
|
|
if ((inline = (rgbpixel *)malloc(xmax*sizeof(rgbpixel))) == NULL |
602 |
|
|
|| (cerr = (short *)calloc(xmax,sizeof(short))) == NULL) |
603 |
|
|
quit("out of memory in getmono"); |
604 |
|
|
dp = ourdata - 1; |
605 |
|
|
for (y = 0; y < ymax; y++) { |
606 |
|
|
picreadline3(y, inline); |
607 |
|
|
err = 0; |
608 |
|
|
for (x = 0; x < xmax; x++) { |
609 |
|
|
if (!(x&7)) |
610 |
|
|
*++dp = 0; |
611 |
|
|
err += rgb_bright(&inline[x]) + cerr[x]; |
612 |
|
|
if (err > 127) |
613 |
|
|
err -= 255; |
614 |
|
|
else |
615 |
greg |
1.3 |
*dp |= 1<<(7-(x&07)); |
616 |
greg |
1.1 |
cerr[x] = err >>= 1; |
617 |
|
|
} |
618 |
|
|
} |
619 |
|
|
free((char *)inline); |
620 |
|
|
free((char *)cerr); |
621 |
|
|
} |
622 |
|
|
|
623 |
|
|
|
624 |
|
|
getfull() /* get full (24-bit) data */ |
625 |
|
|
{ |
626 |
|
|
int y; |
627 |
|
|
|
628 |
|
|
for (y = 0; y < ymax; y++) |
629 |
|
|
picreadline3(y, (rgbpixel *)(ourdata+y*xmax*3)); |
630 |
|
|
} |
631 |
|
|
|
632 |
|
|
|
633 |
|
|
scale_rcolors(xr, sf) /* scale color map */ |
634 |
|
|
register XRASTER *xr; |
635 |
|
|
double sf; |
636 |
|
|
{ |
637 |
|
|
register int i; |
638 |
|
|
long maxv; |
639 |
|
|
|
640 |
|
|
if (xr->pixels == NULL) |
641 |
|
|
return; |
642 |
|
|
|
643 |
|
|
sf = pow(sf, 1.0/gamcor); |
644 |
|
|
maxv = 65535/sf; |
645 |
|
|
|
646 |
|
|
for (i = xr->ncolors; i--; ) { |
647 |
|
|
xr->cdefs[i].red = xr->cdefs[i].red > maxv ? |
648 |
|
|
65535 : |
649 |
|
|
xr->cdefs[i].red * sf; |
650 |
|
|
xr->cdefs[i].green = xr->cdefs[i].green > maxv ? |
651 |
|
|
65535 : |
652 |
|
|
xr->cdefs[i].green * sf; |
653 |
|
|
xr->cdefs[i].blue = xr->cdefs[i].blue > maxv ? |
654 |
|
|
65535 : |
655 |
|
|
xr->cdefs[i].blue * sf; |
656 |
|
|
} |
657 |
|
|
XStoreColors(thedisplay, xr->cmap, xr->cdefs, xr->ncolors); |
658 |
|
|
} |
659 |
|
|
|
660 |
|
|
|
661 |
|
|
getscan(y) |
662 |
|
|
int y; |
663 |
|
|
{ |
664 |
|
|
if (y != cury) { |
665 |
|
|
if (scanpos == NULL || scanpos[y] == -1) |
666 |
|
|
return(-1); |
667 |
|
|
if (fseek(fin, scanpos[y], 0) == -1) |
668 |
|
|
quit("fseek error"); |
669 |
|
|
cury = y; |
670 |
|
|
} else if (scanpos != NULL) |
671 |
|
|
scanpos[y] = ftell(fin); |
672 |
|
|
|
673 |
|
|
if (freadcolrs(scanline, xmax, fin) < 0) |
674 |
|
|
quiterr("read error"); |
675 |
|
|
|
676 |
|
|
cury++; |
677 |
|
|
return(0); |
678 |
|
|
} |
679 |
|
|
|
680 |
|
|
|
681 |
|
|
picreadline3(y, l3) /* read in 3-byte scanline */ |
682 |
|
|
int y; |
683 |
|
|
register rgbpixel *l3; |
684 |
|
|
{ |
685 |
|
|
register int i; |
686 |
|
|
/* read scanline */ |
687 |
|
|
if (getscan(y) < 0) |
688 |
|
|
quiterr("cannot seek for picreadline"); |
689 |
|
|
/* convert scanline */ |
690 |
|
|
normcolrs(scanline, xmax, scale); |
691 |
|
|
for (i = 0; i < xmax; i++) { |
692 |
|
|
l3[i].r = scanline[i][RED]; |
693 |
|
|
l3[i].g = scanline[i][GRN]; |
694 |
|
|
l3[i].b = scanline[i][BLU]; |
695 |
|
|
} |
696 |
|
|
} |
697 |
|
|
|
698 |
|
|
|
699 |
|
|
picwriteline(y, l) /* add 8-bit scanline to image */ |
700 |
|
|
int y; |
701 |
|
|
pixel *l; |
702 |
|
|
{ |
703 |
|
|
bcopy((char *)l, (char *)ourdata+y*xmax, xmax); |
704 |
|
|
} |
705 |
|
|
|
706 |
|
|
|
707 |
|
|
picreadcm(map) /* do gamma correction */ |
708 |
|
|
colormap map; |
709 |
|
|
{ |
710 |
|
|
extern double pow(); |
711 |
|
|
register int i, val; |
712 |
|
|
|
713 |
|
|
for (i = 0; i < 256; i++) { |
714 |
|
|
val = pow(i/256.0, 1.0/gamcor) * 256.0; |
715 |
|
|
map[0][i] = map[1][i] = map[2][i] = val; |
716 |
|
|
} |
717 |
|
|
} |
718 |
|
|
|
719 |
|
|
|
720 |
|
|
picwritecm(map) /* handled elsewhere */ |
721 |
|
|
colormap map; |
722 |
|
|
{ |
723 |
|
|
#ifdef DEBUG |
724 |
|
|
register int i; |
725 |
|
|
|
726 |
|
|
for (i = 0; i < 256; i++) |
727 |
|
|
printf("%d %d %d\n", map[0][i],map[1][i],map[2][i]); |
728 |
|
|
#endif |
729 |
|
|
} |