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/* Copyright (c) 1991 Regents of the University of California */ |
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|
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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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/* |
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* Combine picture files according to calcomp functions. |
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* |
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* 1/4/89 |
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*/ |
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|
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#include <stdio.h> |
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|
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#include <errno.h> |
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|
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#include "color.h" |
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|
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#include "calcomp.h" |
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|
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#define MAXINP 32 /* maximum number of input files */ |
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#define WINSIZ 9 /* scanline window size */ |
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#define MIDSCN 4 /* current scan position */ |
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|
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struct { |
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char *name; /* file or command name */ |
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FILE *fp; /* stream pointer */ |
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COLOR *scan[WINSIZ]; /* input scanline window */ |
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COLOR coef; /* coefficient */ |
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COLOR expos; /* recorded exposure */ |
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} input[MAXINP]; /* input pictures */ |
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|
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int nfiles; /* number of input files */ |
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|
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char vcolin[3][4] = {"ri", "gi", "bi"}; |
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char vcolout[3][4] = {"ro", "go", "bo"}; |
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char vbrtin[] = "li"; |
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char vbrtout[] = "lo"; |
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char vcolexp[3][4] = {"re", "ge", "be"}; |
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char vbrtexp[] = "le"; |
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|
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char vnfiles[] = "nfiles"; |
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char vxmax[] = "xmax"; |
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char vymax[] = "ymax"; |
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char vxres[] = "xres"; |
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char vyres[] = "yres"; |
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char vxpos[] = "x"; |
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char vypos[] = "y"; |
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|
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int nowarn = 0; /* no warning messages? */ |
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|
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int xmax = 0, ymax = 0; /* input resolution */ |
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|
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int xscan, yscan; /* input position */ |
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|
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int xres, yres; /* output resolution */ |
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|
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int xpos, ypos; /* output position */ |
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|
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int wrongformat = 0; |
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|
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FILE *popen(); |
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|
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|
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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 original; |
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double f; |
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int a, i; |
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/* scan options */ |
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for (a = 1; a < argc; a++) { |
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if (argv[a][0] == '-') |
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switch (argv[a][1]) { |
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case 'x': |
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case 'y': |
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a++; |
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continue; |
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case 'w': |
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nowarn = !nowarn; |
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continue; |
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case 'f': |
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case 'e': |
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a++; |
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continue; |
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} |
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break; |
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} |
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/* process files */ |
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for (nfiles = 0; nfiles < MAXINP; nfiles++) { |
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setcolor(input[nfiles].coef, 1.0, 1.0, 1.0); |
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setcolor(input[nfiles].expos, 1.0, 1.0, 1.0); |
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} |
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nfiles = 0; |
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original = 0; |
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for ( ; a < argc; a++) { |
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if (nfiles >= MAXINP) { |
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eputs(argv[0]); |
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eputs(": too many picture files\n"); |
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quit(1); |
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} |
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if (argv[a][0] == '-') |
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switch (argv[a][1]) { |
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case '\0': |
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input[nfiles].name = "<stdin>"; |
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input[nfiles].fp = stdin; |
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break; |
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case 'o': |
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original++; |
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break; |
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case 's': |
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f = atof(argv[++a]); |
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scalecolor(input[nfiles].coef, f); |
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continue; |
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case 'c': |
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colval(input[nfiles].coef,RED)*=atof(argv[++a]); |
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colval(input[nfiles].coef,GRN)*=atof(argv[++a]); |
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colval(input[nfiles].coef,BLU)*=atof(argv[++a]); |
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continue; |
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default: |
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goto usage; |
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} |
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else { |
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input[nfiles].name = argv[a]; |
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input[nfiles].fp = argv[a][0]=='!' ? |
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popen(argv[a]+1, "r") : |
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fopen(argv[a], "r"); |
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if (input[nfiles].fp == NULL) { |
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perror(argv[a]); |
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quit(1); |
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} |
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} |
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checkfile(); |
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if (original) { |
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colval(input[nfiles].coef,RED) /= |
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colval(input[nfiles].expos,RED); |
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colval(input[nfiles].coef,GRN) /= |
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colval(input[nfiles].expos,GRN); |
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colval(input[nfiles].coef,BLU) /= |
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colval(input[nfiles].expos,BLU); |
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} |
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nfiles++; |
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original = 0; |
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} |
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init(); /* set constants */ |
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/* go back and get expressions */ |
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for (a = 1; a < argc; a++) { |
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if (argv[a][0] == '-') |
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switch (argv[a][1]) { |
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case 'x': |
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varset(vxres, ':', eval(argv[++a])); |
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continue; |
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case 'y': |
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varset(vyres, ':', eval(argv[++a])); |
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continue; |
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case 'w': |
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continue; |
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case 'f': |
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fcompile(argv[++a]); |
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continue; |
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case 'e': |
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scompile(argv[++a], NULL, 0); |
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continue; |
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} |
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break; |
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} |
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/* set/get output resolution */ |
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if (!vardefined(vxres)) |
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varset(vxres, ':', (double)xmax); |
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if (!vardefined(vyres)) |
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varset(vyres, ':', (double)ymax); |
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xres = varvalue(vxres) + .5; |
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yres = varvalue(vyres) + .5; |
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if (xres <= 0 || yres <= 0) { |
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eputs(argv[0]); |
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eputs(": illegal output resolution\n"); |
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quit(1); |
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} |
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/* complete header */ |
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printargs(argc, argv, stdout); |
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fputformat(COLRFMT, stdout); |
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putchar('\n'); |
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fputresolu(YMAJOR|YDECR, xres, yres, stdout); |
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/* combine pictures */ |
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combine(); |
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quit(0); |
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usage: |
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eputs("Usage: "); |
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eputs(argv[0]); |
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eputs( |
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" [-w][-x xr][-y yr][-e expr][-f file] [ [-s f][-c r g b] pic ..]\n"); |
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quit(1); |
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} |
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|
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|
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tputs(s) /* put out string preceded by a tab */ |
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char *s; |
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{ |
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char fmt[32]; |
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double d; |
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COLOR ctmp; |
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|
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if (isformat(s)) { /* check format */ |
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formatval(fmt, s); |
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wrongformat = strcmp(fmt, COLRFMT); |
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return; /* don't echo */ |
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} |
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if (isexpos(s)) { /* exposure */ |
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d = exposval(s); |
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scalecolor(input[nfiles].expos, d); |
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} else if (iscolcor(s)) { /* color correction */ |
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colcorval(ctmp, s); |
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multcolor(input[nfiles].expos, ctmp); |
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} |
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/* echo line */ |
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putchar('\t'); |
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fputs(s, stdout); |
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} |
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|
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|
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checkfile() /* ready a file */ |
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{ |
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int xinp, yinp; |
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register int i; |
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/* process header */ |
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fputs(input[nfiles].name, stdout); |
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fputs(":\n", stdout); |
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getheader(input[nfiles].fp, tputs, NULL); |
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if (wrongformat) { |
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eputs(input[nfiles].name); |
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eputs(": not in Radiance picture format\n"); |
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quit(1); |
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} |
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if (fgetresolu(&xinp, &yinp, input[nfiles].fp) != (YMAJOR|YDECR)) { |
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eputs(input[nfiles].name); |
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eputs(": bad picture size\n"); |
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quit(1); |
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} |
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if (xmax == 0 && ymax == 0) { |
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xmax = xinp; |
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ymax = yinp; |
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} else if (xinp != xmax || yinp != ymax) { |
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eputs(input[nfiles].name); |
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eputs(": resolution mismatch\n"); |
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quit(1); |
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} |
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/* allocate scanlines */ |
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for (i = 0; i < WINSIZ; i++) |
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input[nfiles].scan[i] = (COLOR *)emalloc(xmax*sizeof(COLOR)); |
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} |
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|
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|
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init() /* perform final setup */ |
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{ |
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double l_colin(), l_expos(); |
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register int i; |
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/* define constants */ |
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varset(vnfiles, ':', (double)nfiles); |
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varset(vxmax, ':', (double)xmax); |
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varset(vymax, ':', (double)ymax); |
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/* set functions */ |
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for (i = 0; i < 3; i++) { |
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funset(vcolexp[i], 1, ':', l_expos); |
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funset(vcolin[i], 1, '=', l_colin); |
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} |
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funset(vbrtexp, 1, ':', l_expos); |
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funset(vbrtin, 1, '=', l_colin); |
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} |
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|
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|
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combine() /* combine pictures */ |
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{ |
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EPNODE *coldef[3], *brtdef; |
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COLOR *scanout; |
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double d; |
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register int i, j; |
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/* check defined variables */ |
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for (j = 0; j < 3; j++) { |
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if (vardefined(vcolout[j])) |
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coldef[j] = eparse(vcolout[j]); |
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else |
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coldef[j] = NULL; |
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} |
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if (vardefined(vbrtout)) |
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brtdef = eparse(vbrtout); |
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else |
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brtdef = NULL; |
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/* allocate scanline */ |
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scanout = (COLOR *)emalloc(xres*sizeof(COLOR)); |
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/* set input position */ |
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yscan = ymax+MIDSCN; |
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/* combine files */ |
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for (ypos = yres-1; ypos >= 0; ypos--) { |
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advance(); |
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varset(vypos, '=', (double)ypos); |
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for (xpos = 0; xpos < xres; xpos++) { |
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xscan = (long)xpos*xmax/xres; |
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varset(vxpos, '=', (double)xpos); |
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eclock++; |
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if (brtdef != NULL) { |
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d = evalue(brtdef); |
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if (d < 0.0) |
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d = 0.0; |
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setcolor(scanout[xpos], d, d, d); |
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} else { |
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for (j = 0; j < 3; j++) { |
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if (coldef[j] != NULL) { |
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d = evalue(coldef[j]); |
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} else { |
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d = 0.0; |
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for (i = 0; i < nfiles; i++) |
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d += colval(input[i].scan[MIDSCN][xscan],j); |
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} |
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if (d < 0.0) |
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d = 0.0; |
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colval(scanout[xpos],j) = d; |
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} |
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} |
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} |
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if (fwritescan(scanout, xres, stdout) < 0) { |
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perror("write error"); |
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quit(1); |
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} |
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} |
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efree(scanout); |
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} |
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|
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|
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advance() /* read in data for next scanline */ |
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{ |
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int ytarget; |
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register COLOR *st; |
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register int i, j; |
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|
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for (ytarget = (long)ypos*ymax/yres; yscan > ytarget; yscan--) |
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for (i = 0; i < nfiles; i++) { |
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st = input[i].scan[WINSIZ-1]; |
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for (j = WINSIZ-1; j > 0; j--) /* rotate window */ |
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input[i].scan[j] = input[i].scan[j-1]; |
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input[i].scan[0] = st; |
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if (yscan <= MIDSCN) /* hit bottom? */ |
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continue; |
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if (freadscan(st, xmax, input[i].fp) < 0) { /* read */ |
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eputs(input[i].name); |
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eputs(": read error\n"); |
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quit(1); |
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} |
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for (j = 0; j < xmax; j++) /* adjust color */ |
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multcolor(st[j], input[i].coef); |
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} |
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} |
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|
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|
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double |
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l_expos(nam) /* return picture exposure */ |
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register char *nam; |
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{ |
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register int fn, n; |
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|
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fn = argument(1) - .5; |
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if (fn < 0 || fn >= nfiles) |
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return(1.0); |
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if (nam == vbrtexp) |
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return(bright(input[fn].expos)); |
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n = 3; |
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while (n--) |
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if (nam == vcolexp[n]) |
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return(colval(input[fn].expos,n)); |
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eputs("Bad call to l_expos()!\n"); |
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quit(1); |
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} |
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|
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|
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double |
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l_colin(nam) /* return color value for picture */ |
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register char *nam; |
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{ |
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int fn; |
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register int n, xoff, yoff; |
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double d; |
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|
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d = argument(1); |
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if (d > -.5 && d < .5) |
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return((double)nfiles); |
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fn = d - .5; |
| 387 |
if (fn < 0 || fn >= nfiles) { |
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errno = EDOM; |
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return(0.0); |
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} |
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xoff = yoff = 0; |
| 392 |
n = nargum(); |
| 393 |
if (n >= 2) { |
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d = argument(2); |
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if (d < 0.0) { |
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xoff = d-.5; |
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if (xscan+xoff < 0) |
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xoff = -xscan; |
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} else { |
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xoff = d+.5; |
| 401 |
if (xscan+xoff >= xmax) |
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xoff = xmax-1-xscan; |
| 403 |
} |
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} |
| 405 |
if (n >= 3) { |
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d = argument(3); |
| 407 |
if (d < 0.0) { |
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yoff = d-.5; |
| 409 |
if (yoff+MIDSCN < 0) |
| 410 |
yoff = -MIDSCN; |
| 411 |
if (yscan+yoff < 0) |
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yoff = -yscan; |
| 413 |
} else { |
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yoff = d+.5; |
| 415 |
if (yoff+MIDSCN >= WINSIZ) |
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yoff = WINSIZ-1-MIDSCN; |
| 417 |
if (yscan+yoff >= ymax) |
| 418 |
yoff = ymax-1-yscan; |
| 419 |
} |
| 420 |
} |
| 421 |
if (nam == vbrtin) |
| 422 |
return(bright(input[fn].scan[MIDSCN+yoff][xscan+xoff])); |
| 423 |
n = 3; |
| 424 |
while (n--) |
| 425 |
if (nam == vcolin[n]) |
| 426 |
return(colval(input[fn].scan[MIDSCN+yoff][xscan+xoff],n)); |
| 427 |
eputs("Bad call to l_colin()!\n"); |
| 428 |
quit(1); |
| 429 |
} |
| 430 |
|
| 431 |
|
| 432 |
wputs(msg) |
| 433 |
char *msg; |
| 434 |
{ |
| 435 |
if (!nowarn) |
| 436 |
eputs(msg); |
| 437 |
} |
| 438 |
|
| 439 |
|
| 440 |
eputs(msg) |
| 441 |
char *msg; |
| 442 |
{ |
| 443 |
fputs(msg, stderr); |
| 444 |
} |
| 445 |
|
| 446 |
|
| 447 |
quit(code) |
| 448 |
int code; |
| 449 |
{ |
| 450 |
exit(code); |
| 451 |
} |
