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greg |
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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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#endif |
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/* |
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* Send pictures to PC animation system. |
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* |
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* 6/20/88 |
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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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#include "clntrpc.h" |
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#include "scan.h" |
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#define GAMMA 2.0 /* gamma correction factor */ |
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BYTE gammamap[256]; /* gamma correction table */ |
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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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char *progname; |
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int nframes; |
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int port = PCPROGRAM; |
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/* initialize */ |
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compgamma(); |
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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 |
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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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stderr); |
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exit(1); |
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} |
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scry_open(*argv++, TCP, port); |
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scry_set_compress(NONE); |
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scry_set_image(TARGA_IMAGE); |
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scry_set_record(PREVIEW); |
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scry_set_copy_num(3); |
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/* send frames */ |
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nframes = 0; |
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for ( ; --argc; argv++) |
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if (!strcmp(*argv, "-r") && argv[1]) { |
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scry_set_record(atoi(*++argv)); argc--; |
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} else if (!strcmp(*argv, "-c") && argv[1]) { |
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scry_set_copy_num(atoi(*++argv)); argc--; |
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} else { |
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sendframe(*argv); |
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nframes++; |
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} |
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if (nframes == 0) /* get stdin */ |
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sendframe(NULL); |
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/* clean up */ |
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scry_close(); |
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exit(0); |
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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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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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/* open file */ |
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if (file == NULL) { |
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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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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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greg |
1.2 |
if (fgetresolu(&xres, &yres, fp) != (YMAJOR|YDECR) || |
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greg |
1.1 |
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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exit(1); |
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} |
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/* compute center */ |
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xbeg = (SCANLINE-xres)/2; |
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ybeg = (NUMSCANS-yres)/2; |
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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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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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} |
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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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} |
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compgamma() /* compute gamma correction map */ |
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{ |
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extern double pow(); |
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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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if (val > 248) val = 248; |
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gammamap[i] = val; |
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} |
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} |
