93   fprintf(stderr, "usage: %s [switches] ", progname);  in usage()
95   fprintf(stderr, "inputfile outputfile\n");  in usage()
97   fprintf(stderr, "[inputfile]\n");  in usage()
100   fprintf(stderr, "Switches (names may be abbreviated):\n");  in usage()
101   fprintf(stderr, "  -colors N      Reduce image to no more than N colors\n");  in usage()
102   fprintf(stderr, "  -fast          Fast, low-quality processing\n");  in usage()
103   fprintf(stderr, "  -grayscale     Force grayscale output\n");  in usage()
105   fprintf(stderr, "  -scale M/N     Scale output image by fraction M/N, eg, 1/8\n");  in usage()
108   fprintf(stderr, "  -bmp           Select BMP output format (Windows style)%s\n",  in usage()
112   fprintf(stderr, "  -gif           Select GIF output format%s\n",  in usage()
116   fprintf(stderr, "  -os2           Select BMP output format (OS/2 style)%s\n",  in usage()
120   fprintf(stderr, "  -pnm           Select PBMPLUS (PPM/PGM) output format%s\n",  in usage()
124   fprintf(stderr, "  -rle           Select Utah RLE output format%s\n",  in usage()
128   fprintf(stderr, "  -targa         Select Targa output format%s\n",  in usage()
131   fprintf(stderr, "Switches for advanced users:\n");  in usage()
133   fprintf(stderr, "  -dct int       Use integer DCT method%s\n",  in usage()
137   fprintf(stderr, "  -dct fast      Use fast integer DCT (less accurate)%s\n",  in usage()
141   fprintf(stderr, "  -dct float     Use floating-point DCT method%s\n",  in usage()
144   fprintf(stderr, "  -dither fs     Use F-S dithering (default)\n");  in usage()
145   fprintf(stderr, "  -dither none   Don't use dithering in quantization\n");  in usage()
146   fprintf(stderr, "  -dither ordered  Use ordered dither (medium speed, quality)\n");  in usage()
148   fprintf(stderr, "  -map FILE      Map to colors used in named image file\n");  in usage()
150   fprintf(stderr, "  -nosmooth      Don't use high-quality upsampling\n");  in usage()
152   fprintf(stderr, "  -onepass       Use 1-pass quantization (fast, low quality)\n");  in usage()
154   fprintf(stderr, "  -maxmemory N   Maximum memory to use (in kbytes)\n");  in usage()
155   fprintf(stderr, "  -outfile name  Specify name for output file\n");  in usage()
156   fprintf(stderr, "  -verbose  or  -debug   Emit debug output\n");  in usage()
243 	fprintf(stderr, "Independent JPEG Group's DJPEG, version %s\n%s\n",  in parse_switches()
275 	  fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]);  in parse_switches()
382       fprintf(stderr, "Comment, length %ld:\n", (long) length);  in print_text_marker()
384       fprintf(stderr, "APP%d, length %ld:\n",  in print_text_marker()
397 	fprintf(stderr, "\n");  in print_text_marker()
400 	  fprintf(stderr, "\n");  in print_text_marker()
402 	fprintf(stderr, "\\\\");  in print_text_marker()
404 	putc(ch, stderr);  in print_text_marker()
406 	fprintf(stderr, "\\%03o", ch);  in print_text_marker()
413     fprintf(stderr, "\n");  in print_text_marker()
482       fprintf(stderr, "%s: must name one input and one output file\n",  in main()
489       fprintf(stderr, "%s: must name one input and one output file\n",  in main()
497     fprintf(stderr, "%s: only one input file\n", progname);  in main()
505       fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);  in main()
516       fprintf(stderr, "%s: can't open %s\n", progname, outfilename);  in main()