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/* Copyright (c) 1988 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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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* Send pictures to PC animation system. |
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* |
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*/ |
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#include <stdio.h> |
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#include <rasterfile.h> |
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#include "random.h" |
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#include "color.h" |
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#define GAMMA 2.0 /* gamma correction factor */ |
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FILE *popen(); |
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char *pcom = NULL; /* pipe command */ |
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BYTE gammamap[256]; /* gamma correction table */ |
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for (progname = *argv++; --argc; argv++) |
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if (!strcmp(*argv, "-p") && argv[1]) { |
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port = atoi(*++argv); argc--; |
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} else if (!strcmp(*argv, "-u") && argv[1]) { |
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pcom = *++argv; argc--; |
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} else |
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break; |
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if (!argc) { |
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fputs("Usage: ", stderr); |
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fputs(progname, stderr); |
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fputs(" [-p port] hostname [-c copies][-r record] [frame] ..\n", |
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fputs(" [-p port] [-u uncompress] hostname [-c copies][-r record] [frame] ..\n", |
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stderr); |
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exit(1); |
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} |
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sendframe(file) /* convert and send a frame */ |
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char *file; |
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{ |
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char command[128]; |
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COLR scanin[SCANLINE]; |
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int xres, yres; |
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int xbeg, ybeg; |
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FILE *fp; |
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int j; |
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register int k, c; |
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register BYTE *in; |
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short *out; |
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int y; |
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register int x; |
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/* open file */ |
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if (file == NULL) { |
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fp = stdin; |
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if (pcom != NULL) |
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fp = popen(pcom, "r"); |
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else |
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fp = stdin; |
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file = "<stdin>"; |
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} else if ((fp = fopen(file, "r")) == NULL) { |
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} else { |
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if (pcom != NULL) { |
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sprintf(command, "( %s ) < %s", pcom, file); |
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fp = popen(command, "r"); |
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} else |
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fp = fopen(file, "r"); |
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} |
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if (fp == NULL) { |
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perror(file); |
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exit(1); |
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} |
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/* get dimensions */ |
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getheader(fp, NULL); |
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if (fscanf(fp, "-Y %d +X %d\n", &yres, &xres) != 2 || |
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if (checkheader(fp, COLRFMT, NULL) < 0) { |
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fputs(file, stderr); |
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fputs(": not a Radiance picture\n", stderr); |
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exit(1); |
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} |
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if (fgetresolu(&xres, &yres, fp) != (YMAJOR|YDECR) || |
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xres > SCANLINE || yres > NUMSCANS) { |
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fputs(file, stderr); |
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fputs(": bad picture size\n", stderr); |
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/* clear output */ |
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bzero(sc_frame_arr, sizeof(sc_frame_arr)); |
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/* get frame */ |
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for (j = yres-1; j >= 0; j--) { |
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for (y = yres-1; y >= 0; y--) { |
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if (freadcolrs(scanin, xres, fp) < 0) { |
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fputs(file, stderr); |
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fputs(": read error\n", stderr); |
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exit(1); |
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} |
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for (in = scanin[0], out = sc_frame_arr[ybeg+j]+xbeg; |
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in < scanin[xres]; in += 4, out++) { |
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k = in[EXP] - COLXS; |
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if (k >= 8) { |
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in[RED] = |
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in[GRN] = |
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in[BLU] = 255; |
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} else if (k <= -8) { |
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in[RED] = |
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in[GRN] = |
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in[BLU] = 0; |
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} else if (k > 0) { |
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c = in[RED] << k; |
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in[RED] = c > 255 ? 255 : c; |
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c = in[GRN] << k; |
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in[GRN] = c > 255 ? 255 : c; |
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c = in[BLU] << k; |
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in[BLU] = c > 255 ? 255 : c; |
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} else if (k < 0) { |
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in[RED] = in[RED] >> -k; |
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in[GRN] = in[GRN] >> -k; |
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in[BLU] = in[BLU] >> -k; |
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} |
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for (k = 0; k < 3; k++) |
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*out = *out<<5 | (gammamap[in[k]]+(random()&0x7))>>3; |
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} |
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normcolrs(scanin, xres, 0); /* normalize */ |
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for (x = 0; x < xres; x++) /* convert */ |
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sc_frame_arr[y+ybeg][x+xbeg] = |
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((gammamap[scanin[x][RED]]+(random()&7))&0xf8)<<7 |
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| ((gammamap[scanin[x][GRN]]+(random()&7))&0xf8)<<2 |
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| (gammamap[scanin[x][BLU]]+(random()&7))>>3; |
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} |
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/* send frame */ |
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scry_send_frame(); |
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/* close file */ |
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fclose(fp); |
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if (pcom != NULL) |
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pclose(fp); |
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else |
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fclose(fp); |
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} |
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register int i, val; |
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for (i = 0; i < 256; i++) { |
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val = pow(i/256.0, 1.0/GAMMA) * 256.0; |
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val = pow((i+0.5)/256.0, 1.0/GAMMA) * 256.0; |
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if (val > 248) val = 248; |
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gammamap[i] = val; |
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} |
