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#include <fcntl.h> |
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#endif |
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#include "color.h" |
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#include "random.h" |
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|
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#define HMARGIN (.5*72) /* horizontal margin */ |
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#define VMARGIN (.5*72) /* vertical margin */ |
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#define PWIDTH (8.5*72-2*HMARGIN) /* width of device */ |
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#define PHEIGHT (11*72-2*VMARGIN) /* height of device */ |
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|
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#define RUNCHR '*' /* character to start rle */ |
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#define MINRUN 4 /* minimum run-length */ |
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#define RSTRT '!' /* character for MINRUN */ |
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#define MAXRUN (MINRUN+'~'-RSTRT) /* maximum run-length */ |
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|
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char code[] = /* 6-bit code lookup table */ |
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"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ@+"; |
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|
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printf("%%%%EndComments\n"); |
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printf("64 dict begin\n"); |
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/* define image reader */ |
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PSprocdef("read6bit"); |
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PSprocdef("read6bitRLE"); |
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/* set up transformation matrix */ |
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printf("%f %f translate\n", HMARGIN, VMARGIN); |
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if (PWIDTH > PHEIGHT ^ landscape) { |
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printf("%f %f scale\n", iwidth, iheight); |
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printf("%%%%EndProlog\n"); |
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/* start image procedure */ |
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printf("%d %d 8 [%d 0 0 %d 0 %d] {read6bit} image", xmax, ymax, |
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printf("%d %d 8 [%d 0 0 %d 0 %d] {read6bitRLE} image\n", xmax, ymax, |
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xmax, -ymax, ymax); |
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} |
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|
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itab[code[i]] = i<<2 | 2; |
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itab[code[0]] = 0; /* black is black */ |
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itab[code[63]] = 255; /* and white is white */ |
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printf("/decode ["); |
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printf("/codetab ["); |
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for (i = 0; i < 128; i++) { |
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if (!(i & 0xf)) |
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putchar('\n'); |
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} |
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printf("\n] def\n"); |
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printf("/scanline %d string def\n", xmax); |
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printf("/nrept 0 def\n"); |
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printf("/readbyte { currentfile read not {stop} if } def\n"); |
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printf("/decode { codetab exch get } def\n"); |
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printf("/%s {\n", nam); |
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printf("\t{ 0 1 %d { scanline exch\n", xmax-1); |
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printf("\t\t{ decode currentfile read not {stop} if get\n"); |
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printf("\tdup 0 lt {pop} {exit} ifelse } loop put } for\n"); |
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printf("\t} stopped {pop pop pop 0 string} {scanline} ifelse\n"); |
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printf("\t\tnrept 0 le\n"); |
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printf("\t\t\t{ { readbyte dup %d eq\n", RUNCHR); |
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printf("\t\t\t\t\t{ pop /nrept readbyte %d sub def\n", RSTRT-MINRUN+1); |
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printf("\t\t\t\t\t\t/reptv readbyte decode def\n"); |
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printf("\t\t\t\t\t\treptv exit }\n"); |
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printf("\t\t\t\t\t{ decode dup 0 lt {pop} {exit} ifelse }\n"); |
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printf("\t\t\t\tifelse } loop }\n"); |
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printf("\t\t\t{ /nrept nrept 1 sub def reptv }\n"); |
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printf("\t\tifelse put\n"); |
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printf("\t\t} for\n"); |
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printf("\t} stopped {pop pop 0 string} {scanline} ifelse\n"); |
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printf("} bind def\n"); |
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} |
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ra2ps() /* convert Radiance scanlines to 6-bit */ |
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{ |
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COLR *scanin; |
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register int col = 0; |
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register COLR *scanin; |
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register int c; |
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int lastc, cnt; |
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register int x; |
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int y; |
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/* allocate scanline */ |
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if (freadcolrs(scanin, xmax, stdin) < 0) |
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quiterr("error reading Radiance picture"); |
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normcolrs(scanin, xmax, bradj); /* normalize */ |
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lastc = -1; cnt = 0; |
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for (x = 0; x < xmax; x++) { |
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if (!(col++ & 0x3f)) |
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putchar('\n'); |
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c = normbright(scanin[x]) + (random()&3); |
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c = normbright(scanin[x]) + 2; |
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if (c > 255) c = 255; |
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putchar(code[c>>2]); |
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c = code[c>>2]; |
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if (c == lastc && cnt < MAXRUN) |
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cnt++; |
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else { |
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putrle(cnt, lastc); |
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lastc = c; |
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cnt = 1; |
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} |
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} |
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putrle(cnt, lastc); |
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if (ferror(stdout)) |
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quiterr("error writing PostScript file"); |
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} |
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putchar('\n'); |
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/* free scanline */ |
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free((char *)scanin); |
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} |
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|
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|
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putrle(cnt, cod) /* put out cnt of cod */ |
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register int cnt, cod; |
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{ |
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static int col = 0; |
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|
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if (cnt >= MINRUN) { |
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col += 3; |
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putchar(RUNCHR); |
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putchar(RSTRT-MINRUN+cnt); |
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putchar(cod); |
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} else { |
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col += cnt; |
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while (cnt-- > 0) |
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putchar(cod); |
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} |
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if (col >= 72) { |
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putchar('\n'); |
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col = 0; |
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} |
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} |