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/* Copyright (c) 1986 Regents of the University of California */ |
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/* Copyright (c) 1991 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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sprintf(msg, "can't open output \"%s\"", argv[i+1]); |
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quiterr(msg); |
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} |
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/* set gamma */ |
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setcolrgam(gamma); |
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/* convert */ |
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if (reverse) { |
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/* get header */ |
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if (!goodpic(&head)) |
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quiterr("incompatible format"); |
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/* put header */ |
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printargs(argc, argv, stdout); |
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printargs(i, argv, stdout); |
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fputformat(COLRFMT, stdout); |
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putchar('\n'); |
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fputresolu(YMAJOR|YDECR, head.x, head.y, stdout); |
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/* convert file */ |
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tg2ra(&head); |
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} else { |
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getheader(stdin, NULL); |
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if (fgetresolu(&head.x, &head.y, stdin) != (YMAJOR|YDECR)) |
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if (checkheader(stdin, COLRFMT, NULL) < 0 || |
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fgetresolu(&head.x, &head.y, stdin) != (YMAJOR|YDECR)) |
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quiterr("bad picture file"); |
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/* assign header */ |
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head.textSize = 0; |
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tg2ra(hp) /* targa file to RADIANCE file */ |
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struct hdStruct *hp; |
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{ |
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float gmap[256]; |
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COLOR *scanline; |
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COLR *scanline; |
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unsigned char *tarData; |
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register int i, j; |
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/* set up gamma correction */ |
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for (i = 0; i < 256; i++) |
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gmap[i] = pow((i+.5)/256., gamma); |
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/* skip color table */ |
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if (hp->mapType == CM_HASMAP) |
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fseek(stdin, (long)hp->mapLength*hp->CMapBits/8, 1); |
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/* get data */ |
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readtarga(hp, tarData, stdin); |
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/* allocate input scanline */ |
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scanline = (COLOR *)emalloc(hp->x*sizeof(COLOR)); |
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scanline = (COLR *)emalloc(hp->x*sizeof(COLR)); |
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/* convert file */ |
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for (i = hp->y-1; i >= 0; i--) { |
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if (hp->dataBits == 16) { |
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register unsigned short *dp; |
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dp = (unsigned short *)tarData + i*hp->x; |
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for (j = 0; j < hp->x; j++) { |
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setcolor(scanline[j], gmap[*dp>>7 & 0xf8], |
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gmap[*dp>>2 & 0xf8], |
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gmap[*dp<<3 & 0xf8]); |
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scanline[j][RED] = *dp>>7 & 0xf8; |
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scanline[j][GRN] = *dp>>2 & 0xf8; |
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scanline[j][BLU] = *dp<<3 & 0xf8; |
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dp++; |
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} |
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} else { /* hp->dataBits == 24 */ |
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register unsigned char *dp; |
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dp = (unsigned char *)tarData + i*3*hp->x; |
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for (j = 0; j < hp->x; j++) { |
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setcolor(scanline[j], gmap[dp[2]], |
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gmap[dp[1]], |
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gmap[dp[0]]); |
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scanline[j][RED] = dp[2]; |
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scanline[j][GRN] = dp[1]; |
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scanline[j][BLU] = dp[0]; |
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dp += 3; |
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} |
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} |
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if (fwritescan(scanline, hp->x, stdout) < 0) |
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gambs_colrs(scanline, hp->x); |
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if (fwritecolrs(scanline, hp->x, stdout) < 0) |
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quiterr("error writing RADIANCE file"); |
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} |
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free((char *)scanline); |
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ra2tg(hp) /* convert radiance to targa file */ |
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struct hdStruct *hp; |
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{ |
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#define map(v) (v >= 1.0 ? 1023 : (int)(v*1023.+.5)) |
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unsigned char gmap[1024]; |
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register int i, j; |
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unsigned char *tarData; |
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COLOR *inline; |
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/* set up gamma correction */ |
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for (i = 0; i < 1024; i++) { |
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j = 256.*pow((i+.5)/1024., 1./gamma); |
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gmap[i] = hp->dataBits == 16 && j > 248 ? 248 : j; |
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} |
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COLR *inl; |
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/* allocate space for data */ |
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inline = (COLOR *)emalloc(hp->x*sizeof(COLOR)); |
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inl = (COLR *)emalloc(hp->x*sizeof(COLR)); |
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tarData = taralloc(hp); |
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/* convert file */ |
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for (j = hp->y-1; j >= 0; j--) { |
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if (freadscan(inline, hp->x, stdin) < 0) |
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if (freadcolrs(inl, hp->x, stdin) < 0) |
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quiterr("error reading RADIANCE file"); |
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colrs_gambs(inl, hp->x); |
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if (hp->dataBits == 16) { |
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register unsigned short *dp; |
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register int v; |
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dp = (unsigned short *)tarData + j*hp->x; |
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for (i = 0; i < hp->x; i++) { |
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*dp = ((gmap[map(colval(inline[i],RED))] |
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+(random()&7)) & 0xf8)<<7; |
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*dp |= ((gmap[map(colval(inline[i],GRN))] |
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+(random()&7)) & 0xf8)<<2; |
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*dp++ |= (gmap[map(colval(inline[i],BLU))] |
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+(random()&7))>>3; |
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v = inl[i][RED] + (random()&7); |
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if (v > 255) v = 255; |
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*dp = (v&0xf8)<<7; |
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v = inl[i][GRN] + (random()&7); |
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if (v > 255) v = 255; |
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*dp |= (v&0xf8)<<2; |
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v = inl[i][BLU] + (random()&7); |
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if (v > 255) v = 255; |
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*dp++ |= v>>3; |
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} |
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} else { /* hp->dataBits == 24 */ |
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register unsigned char *dp; |
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dp = (unsigned char *)tarData + j*3*hp->x; |
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for (i = 0; i < hp->x; i++) { |
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*dp++ = gmap[map(colval(inline[i],BLU))]; |
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*dp++ = gmap[map(colval(inline[i],GRN))]; |
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*dp++ = gmap[map(colval(inline[i],RED))]; |
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*dp++ = inl[i][BLU]; |
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*dp++ = inl[i][GRN]; |
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*dp++ = inl[i][RED]; |
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} |
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} |
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} |
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/* write out targa data */ |
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writetarga(hp, tarData, stdout); |
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free((char *)inline); |
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> |
free((char *)inl); |
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free((char *)tarData); |
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– |
#undef map |
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} |
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