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djpeg/ReadMe1st
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » Personal collection » Acorn hard disk » apps » web |
| Filename: | djpeg/ReadMe1st |
| Read OK: | ✔ |
| File size: | 0313 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
Duplicates
There is 1 duplicate copy of this file in the archive:
- Personal collection » Acorn ADFS disks » Greaseweazled » adfs_1.6M_NetBits.adf » djpeg/ReadMe1st
- Personal collection » Acorn hard disk » apps » web » djpeg/ReadMe1st
File contents
djpeg ===== This software is based in part on the work of the Independent JPEG Group. It is actually a port of djpeg to RISC OS with a subtle change to alter the handling of unknown major revision numbers. The standard version 6a distribution treats an unknown major version number as a warning. This causes problems for ArcWeb (and ChangeFSI) as the program attempts to write this to the screen and causes a VDU4-style window to open and requires the user to "Press SPACE or click mouse to coninue." I have *altered* the handling of this situation to downgrade the message to a trace level message. This means that it doesn't appear unless you are using the -verbose option. This is the only alteration I have made to the distribution code. -- Stewart Brodie 18th August 1997.
00000000 64 6a 70 65 67 0a 3d 3d 3d 3d 3d 0a 0a 54 68 69 |djpeg.=====..Thi| 00000010 73 20 73 6f 66 74 77 61 72 65 20 69 73 20 62 61 |s software is ba| 00000020 73 65 64 20 69 6e 20 70 61 72 74 20 6f 6e 20 74 |sed in part on t| 00000030 68 65 20 77 6f 72 6b 20 6f 66 20 74 68 65 20 49 |he work of the I| 00000040 6e 64 65 70 65 6e 64 65 6e 74 20 4a 50 45 47 20 |ndependent JPEG | 00000050 47 72 6f 75 70 2e 0a 0a 49 74 20 69 73 20 61 63 |Group...It is ac| 00000060 74 75 61 6c 6c 79 20 61 20 70 6f 72 74 20 6f 66 |tually a port of| 00000070 20 64 6a 70 65 67 20 74 6f 20 52 49 53 43 20 4f | djpeg to RISC O| 00000080 53 20 77 69 74 68 20 61 20 73 75 62 74 6c 65 20 |S with a subtle | 00000090 63 68 61 6e 67 65 20 74 6f 20 61 6c 74 65 72 0a |change to alter.| 000000a0 74 68 65 20 68 61 6e 64 6c 69 6e 67 20 6f 66 20 |the handling of | 000000b0 75 6e 6b 6e 6f 77 6e 20 6d 61 6a 6f 72 20 72 65 |unknown major re| 000000c0 76 69 73 69 6f 6e 20 6e 75 6d 62 65 72 73 2e 20 |vision numbers. | 000000d0 20 54 68 65 20 73 74 61 6e 64 61 72 64 20 76 65 | The standard ve| 000000e0 72 73 69 6f 6e 20 36 61 0a 64 69 73 74 72 69 62 |rsion 6a.distrib| 000000f0 75 74 69 6f 6e 20 74 72 65 61 74 73 20 61 6e 20 |ution treats an | 00000100 75 6e 6b 6e 6f 77 6e 20 6d 61 6a 6f 72 20 76 65 |unknown major ve| 00000110 72 73 69 6f 6e 20 6e 75 6d 62 65 72 20 61 73 20 |rsion number as | 00000120 61 20 77 61 72 6e 69 6e 67 2e 20 20 54 68 69 73 |a warning. This| 00000130 0a 63 61 75 73 65 73 20 70 72 6f 62 6c 65 6d 73 |.causes problems| 00000140 20 66 6f 72 20 41 72 63 57 65 62 20 28 61 6e 64 | for ArcWeb (and| 00000150 20 43 68 61 6e 67 65 46 53 49 29 20 61 73 20 74 | ChangeFSI) as t| 00000160 68 65 20 70 72 6f 67 72 61 6d 20 61 74 74 65 6d |he program attem| 00000170 70 74 73 20 74 6f 0a 77 72 69 74 65 20 74 68 69 |pts to.write thi| 00000180 73 20 74 6f 20 74 68 65 20 73 63 72 65 65 6e 20 |s to the screen | 00000190 61 6e 64 20 63 61 75 73 65 73 20 61 20 56 44 55 |and causes a VDU| 000001a0 34 2d 73 74 79 6c 65 20 77 69 6e 64 6f 77 20 74 |4-style window t| 000001b0 6f 20 6f 70 65 6e 20 61 6e 64 0a 72 65 71 75 69 |o open and.requi| 000001c0 72 65 73 20 74 68 65 20 75 73 65 72 20 74 6f 20 |res the user to | 000001d0 22 50 72 65 73 73 20 53 50 41 43 45 20 6f 72 20 |"Press SPACE or | 000001e0 63 6c 69 63 6b 20 6d 6f 75 73 65 20 74 6f 20 63 |click mouse to c| 000001f0 6f 6e 69 6e 75 65 2e 22 0a 0a 49 20 68 61 76 65 |oninue."..I have| 00000200 20 2a 61 6c 74 65 72 65 64 2a 20 74 68 65 20 68 | *altered* the h| 00000210 61 6e 64 6c 69 6e 67 20 6f 66 20 74 68 69 73 20 |andling of this | 00000220 73 69 74 75 61 74 69 6f 6e 20 74 6f 20 64 6f 77 |situation to dow| 00000230 6e 67 72 61 64 65 20 74 68 65 20 6d 65 73 73 61 |ngrade the messa| 00000240 67 65 0a 74 6f 20 61 20 74 72 61 63 65 20 6c 65 |ge.to a trace le| 00000250 76 65 6c 20 6d 65 73 73 61 67 65 2e 20 20 54 68 |vel message. Th| 00000260 69 73 20 6d 65 61 6e 73 20 74 68 61 74 20 69 74 |is means that it| 00000270 20 64 6f 65 73 6e 27 74 20 61 70 70 65 61 72 20 | doesn't appear | 00000280 75 6e 6c 65 73 73 0a 79 6f 75 20 61 72 65 20 75 |unless.you are u| 00000290 73 69 6e 67 20 74 68 65 20 2d 76 65 72 62 6f 73 |sing the -verbos| 000002a0 65 20 6f 70 74 69 6f 6e 2e 20 20 20 54 68 69 73 |e option. This| 000002b0 20 69 73 20 74 68 65 20 6f 6e 6c 79 20 61 6c 74 | is the only alt| 000002c0 65 72 61 74 69 6f 6e 20 49 20 68 61 76 65 0a 6d |eration I have.m| 000002d0 61 64 65 20 74 6f 20 74 68 65 20 64 69 73 74 72 |ade to the distr| 000002e0 69 62 75 74 69 6f 6e 20 63 6f 64 65 2e 0a 0a 2d |ibution code...-| 000002f0 2d 0a 53 74 65 77 61 72 74 20 42 72 6f 64 69 65 |-.Stewart Brodie| 00000300 0a 31 38 74 68 20 41 75 67 75 73 74 20 31 39 39 |.18th August 199| 00000310 37 2e 0a |7..| 00000313
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