144   fprintf(stderr, "usage: %s [switches] ", progname);  in usage()
146   fprintf(stderr, "inputfile outputfile\n");  in usage()
148   fprintf(stderr, "[inputfile]\n");  in usage()
151   fprintf(stderr, "Switches (names may be abbreviated):\n");  in usage()
152   fprintf(stderr, "  -quality N     Compression quality (0..100; 5-95 is useful range)\n");  in usage()
153   fprintf(stderr, "  -grayscale     Create monochrome JPEG file\n");  in usage()
155   fprintf(stderr, "  -optimize      Optimize Huffman table (smaller file, but slow compression)\n");  in usage()
158   fprintf(stderr, "  -progressive   Create progressive JPEG file\n");  in usage()
161   fprintf(stderr, "  -targa         Input file is Targa format (usually not needed)\n");  in usage()
163   fprintf(stderr, "Switches for advanced users:\n");  in usage()
165   fprintf(stderr, "  -dct int       Use integer DCT method%s\n",  in usage()
169   fprintf(stderr, "  -dct fast      Use fast integer DCT (less accurate)%s\n",  in usage()
173   fprintf(stderr, "  -dct float     Use floating-point DCT method%s\n",  in usage()
176   fprintf(stderr, "  -restart N     Set restart interval in rows, or in blocks with B\n");  in usage()
178   fprintf(stderr, "  -smooth N      Smooth dithered input (N=1..100 is strength)\n");  in usage()
180   fprintf(stderr, "  -maxmemory N   Maximum memory to use (in kbytes)\n");  in usage()
181   fprintf(stderr, "  -outfile name  Specify name for output file\n");  in usage()
182   fprintf(stderr, "  -verbose  or  -debug   Emit debug output\n");  in usage()
183   fprintf(stderr, "Switches for wizards:\n");  in usage()
185   fprintf(stderr, "  -arithmetic    Use arithmetic coding\n");  in usage()
187   fprintf(stderr, "  -baseline      Force baseline quantization tables\n");  in usage()
188   fprintf(stderr, "  -qtables file  Use quantization tables given in file\n");  in usage()
189   fprintf(stderr, "  -qslots N[,...]    Set component quantization tables\n");  in usage()
190   fprintf(stderr, "  -sample HxV[,...]  Set component sampling factors\n");  in usage()
192   fprintf(stderr, "  -scans file    Create multi-scan JPEG per script file\n");  in usage()
252       fprintf(stderr, "%s: sorry, arithmetic coding not supported\n",  in parse_switches()
280 	fprintf(stderr, "Independent JPEG Group's CJPEG, version %s\n%s\n",  in parse_switches()
308       fprintf(stderr, "%s: sorry, entropy optimization was not compiled\n",  in parse_switches()
325       fprintf(stderr, "%s: sorry, progressive output was not compiled\n",  in parse_switches()
393       fprintf(stderr, "%s: sorry, multi-scan output was not compiled\n",  in parse_switches()
517       fprintf(stderr, "%s: must name one input and one output file\n",  in main()
524       fprintf(stderr, "%s: must name one input and one output file\n",  in main()
532     fprintf(stderr, "%s: only one input file\n", progname);  in main()
540       fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);  in main()
551       fprintf(stderr, "%s: can't open %s\n", progname, outfilename);  in main()