Home » Recent acquisitions » Acorn ADFS disks » adfs_AcornUser_199801_2.adf » Regulars2 » StarInfo/Fletcher/Tanner/!Png2Spr/!Help
StarInfo/Fletcher/Tanner/!Png2Spr/!Help
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 » Recent acquisitions » Acorn ADFS disks » adfs_AcornUser_199801_2.adf » Regulars2 |
| Filename: | StarInfo/Fletcher/Tanner/!Png2Spr/!Help |
| Read OK: | ✔ |
| File size: | 127D bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
!PNG2SPR
========
(c) T. R. Tanner
2 Cavendish Court, London Road, Hemel Hempstead, Herts HP3 9FH
email ttehtann@argonet.co.uk
This program allows conversion of graphics in the new "PNG" format to Acorn
sprite files, and vice versa. Note that due to the Acorn sprite formats, the
program converts 16 bit RGB colours to 8 bit RGB colours. Also, transparency is
an on / off mask.
The PNG web pages (specifications & example files) are to be found at
http://www.wco.com/~png/
To convert a PNG file (type B60), double click the file, or drop the file onto
the program icon on the icon bar. To save the file when converted, click the
menu button over the displayed picture, and drag the sprite to where you want
to save it, or type in a path name and click OK.
To convert a sprite to a PNG file, drop the sprite onto the iconbar icon.
Currently there are no conversion options, apart from the "Use Gamma" item on
the iconbar menu - if this is ticked, the file is given a gamma correction of
1 / 1.8 (the inverse of my guess at the gamma value for my monitor!).
Icon Bar Menu:
Info Standard useless program info
Single Task When ticked. the program does not release control to the wimp.
It therefore converts faster (but you can't do anything else!).
Off by default.
Use Scale When ticked, the program uses the "pHYS" chunk in the file (if
supplied) to scale the picture. NOTE: The size is not
guaranteed - I will supply some method of configuring real
pixel sizes in a later version. On by default.
Use Gamma When ticked, the program uses the "gAMA" chunk in the file (if
supplied) to apply gamma correction. On by default.
Viewer Mode When ticked, supresses queries about unsaved files on closing /
quitting
Transparency When clicked, brings up a screen allowing you to select
transparency options, as follows:
Ignore Ignore transparency / alpha channels (all pixels
considered opaque).
Create mask Create a mask (pixels whose opacity is less
than the slider value are considered
transparent).
Use Background
in bKGD chunk If bKGD chunk supplied, use it. Otherwise
use the colour selected by the button.
Use specified
colour Always use the colour selected by the button.
Save Options Save the above state of ticks above for the next time you run
the program.
Quit No prizes for guessing the effect of this one!
The program supports the Acorn desktop save and help protocols.
Known Bugs:
-----------
Masks are not converted from 8bpp sprite files to PNG files (mainly
because I'd probably have to produce a truecolour image)
sBIT is not dealt with, so converting a 32k sprite to a PNG and back to
a sprite results in a 16M colour sprite.
Future Enhancements:
--------------------
1 Allow specification of compression & interlacing when converting
sprite files.
2 Tidy up interface (again)
3 Convert Acorn masks on 8bpp sprites
4 Lots of others which are in the source code...
Tedious legal message
=====================
This application is freeware. It can be distributed freely as long as only
reasonable charges are made for media and distribution. I retain copyright on
all program code and documentation contained in this distribution.
This software is supplied �as�is�: I make no warranty, expressed or
implied, of the merchantability of this software or its �tness for any
particular purpose. In no circumstances shall I be liable for any damage,
loss of pro�ts, or any indirect or consequential loss arising out of the use
of this software or inability to use this software, even if I have been
advised of the possibility of such loss.
In other words, if your computer crashes, blows up, you lose all your work
etc. all because of !Png2Spr, don�t blame me.
Acknowledgments
---------------
Thanks are due to:
Greg Roelofs, for being helpful
Nick Smith, ANT Ltd, for sending me the official PNG sprites and pointing out
that I can't spell my own name.
Nick Roberts ("tigger@argonet.co.uk") for using the program and making some
suggestions to improve it.
Stewart Brodie for doing much the same
The producers of the Zlib & PNG support libraries
Copyrights
==========
The PNG support library (libpng) is copyright as follows:
Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
Copyright (c) 1996, 1997 Andreas Dilger
Guy Eric Schalnat, Group 42, Inc.
Contributing Authors:
John Bowler
Sam Bushell
Kevin Bracey
Andreas Dilger
Magnus Holmgren
Dave Martindale
Greg Roelofs
Guy Eric Schalnat
Paul Schmidt
Tom Tanner
Tim Wegner
The inflate / deflate support library (zlib) is copyright as follows:
Copyright (c) 1995-1996 Jean-loup Gailly and Mark Adler
00000000 21 50 4e 47 32 53 50 52 0a 3d 3d 3d 3d 3d 3d 3d |!PNG2SPR.=======|
00000010 3d 0a 0a 28 63 29 20 54 2e 20 52 2e 20 54 61 6e |=..(c) T. R. Tan|
00000020 6e 65 72 0a 32 20 43 61 76 65 6e 64 69 73 68 20 |ner.2 Cavendish |
00000030 43 6f 75 72 74 2c 20 4c 6f 6e 64 6f 6e 20 52 6f |Court, London Ro|
00000040 61 64 2c 20 48 65 6d 65 6c 20 48 65 6d 70 73 74 |ad, Hemel Hempst|
00000050 65 61 64 2c 20 48 65 72 74 73 20 48 50 33 20 39 |ead, Herts HP3 9|
00000060 46 48 0a 0a 65 6d 61 69 6c 20 74 74 65 68 74 61 |FH..email ttehta|
00000070 6e 6e 40 61 72 67 6f 6e 65 74 2e 63 6f 2e 75 6b |nn@argonet.co.uk|
00000080 0a 0a 0a 54 68 69 73 20 70 72 6f 67 72 61 6d 20 |...This program |
00000090 61 6c 6c 6f 77 73 20 63 6f 6e 76 65 72 73 69 6f |allows conversio|
000000a0 6e 20 6f 66 20 67 72 61 70 68 69 63 73 20 69 6e |n of graphics in|
000000b0 20 74 68 65 20 6e 65 77 20 22 50 4e 47 22 20 66 | the new "PNG" f|
000000c0 6f 72 6d 61 74 20 74 6f 20 41 63 6f 72 6e 0a 73 |ormat to Acorn.s|
000000d0 70 72 69 74 65 20 66 69 6c 65 73 2c 20 61 6e 64 |prite files, and|
000000e0 20 76 69 63 65 20 76 65 72 73 61 2e 20 4e 6f 74 | vice versa. Not|
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00000100 65 20 41 63 6f 72 6e 20 73 70 72 69 74 65 20 66 |e Acorn sprite f|
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00000120 72 61 6d 20 63 6f 6e 76 65 72 74 73 20 31 36 20 |ram converts 16 |
00000130 62 69 74 20 52 47 42 20 63 6f 6c 6f 75 72 73 20 |bit RGB colours |
00000140 74 6f 20 38 20 62 69 74 20 52 47 42 20 63 6f 6c |to 8 bit RGB col|
00000150 6f 75 72 73 2e 20 41 6c 73 6f 2c 20 74 72 61 6e |ours. Also, tran|
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00000230 65 20 70 72 6f 67 72 61 6d 20 69 63 6f 6e 20 6f |e program icon o|
00000240 6e 20 74 68 65 20 69 63 6f 6e 20 62 61 72 2e 20 |n the icon bar. |
00000250 54 6f 20 73 61 76 65 20 74 68 65 20 66 69 6c 65 |To save the file|
00000260 20 77 68 65 6e 20 63 6f 6e 76 65 72 74 65 64 2c | when converted,|
00000270 20 63 6c 69 63 6b 20 74 68 65 0a 6d 65 6e 75 20 | click the.menu |
00000280 62 75 74 74 6f 6e 20 6f 76 65 72 20 74 68 65 20 |button over the |
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00000420 74 6f 72 21 29 2e 0a 0a 49 63 6f 6e 20 42 61 72 |tor!)...Icon Bar|
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00000480 6d 20 64 6f 65 73 20 6e 6f 74 20 72 65 6c 65 61 |m does not relea|
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00000500 20 53 63 61 6c 65 09 57 68 65 6e 20 74 69 63 6b | Scale.When tick|
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00000520 75 73 65 73 20 74 68 65 20 22 70 48 59 53 22 20 |uses the "pHYS" |
00000530 63 68 75 6e 6b 20 69 6e 20 74 68 65 20 66 69 6c |chunk in the fil|
00000540 65 20 28 69 66 0a 09 09 73 75 70 70 6c 69 65 64 |e (if...supplied|
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00000580 67 75 61 72 61 6e 74 65 65 64 20 2d 20 49 20 77 |guaranteed - I w|
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00000910 51 75 69 74 09 09 4e 6f 20 70 72 69 7a 65 73 20 |Quit..No prizes |
00000920 66 6f 72 20 67 75 65 73 73 69 6e 67 20 74 68 65 |for guessing the|
00000930 20 65 66 66 65 63 74 20 6f 66 20 74 68 69 73 20 | effect of this |
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00000960 63 6f 72 6e 20 64 65 73 6b 74 6f 70 20 73 61 76 |corn desktop sav|
00000970 65 20 61 6e 64 20 68 65 6c 70 20 70 72 6f 74 6f |e and help proto|
00000980 63 6f 6c 73 2e 0a 0a 4b 6e 6f 77 6e 20 42 75 67 |cols...Known Bug|
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00000a70 20 72 65 73 75 6c 74 73 20 69 6e 20 61 20 31 36 | results in a 16|
00000a80 4d 20 63 6f 6c 6f 75 72 20 73 70 72 69 74 65 2e |M colour sprite.|
00000a90 0a 0a 46 75 74 75 72 65 20 45 6e 68 61 6e 63 65 |..Future Enhance|
00000aa0 6d 65 6e 74 73 3a 0a 2d 2d 2d 2d 2d 2d 2d 2d 2d |ments:.---------|
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00000b10 54 69 64 79 20 75 70 20 69 6e 74 65 72 66 61 63 |Tidy up interfac|
00000b20 65 20 28 61 67 61 69 6e 29 0a 33 09 43 6f 6e 76 |e (again).3.Conv|
00000b30 65 72 74 20 41 63 6f 72 6e 20 6d 61 73 6b 73 20 |ert Acorn masks |
00000b40 6f 6e 20 38 62 70 70 20 73 70 72 69 74 65 73 0a |on 8bpp sprites.|
00000b50 34 09 4c 6f 74 73 20 6f 66 20 6f 74 68 65 72 73 |4.Lots of others|
00000b60 20 77 68 69 63 68 20 61 72 65 20 69 6e 20 74 68 | which are in th|
00000b70 65 20 73 6f 75 72 63 65 20 63 6f 64 65 2e 2e 2e |e source code...|
00000b80 0a 0a 54 65 64 69 6f 75 73 20 6c 65 67 61 6c 20 |..Tedious legal |
00000b90 6d 65 73 73 61 67 65 0a 3d 3d 3d 3d 3d 3d 3d 3d |message.========|
00000ba0 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 0a 0a 20 |=============.. |
00000bb0 20 20 54 68 69 73 20 61 70 70 6c 69 63 61 74 69 | This applicati|
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00000bd0 49 74 20 63 61 6e 20 62 65 20 64 69 73 74 72 69 |It can be distri|
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00000c30 69 6f 6e 2e 20 49 20 72 65 74 61 69 6e 20 63 6f |ion. I retain co|
00000c40 70 79 72 69 67 68 74 20 6f 6e 0a 61 6c 6c 20 70 |pyright on.all p|
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00000c60 64 6f 63 75 6d 65 6e 74 61 74 69 6f 6e 20 63 6f |documentation co|
00000c70 6e 74 61 69 6e 65 64 20 69 6e 20 74 68 69 73 20 |ntained in this |
00000c80 64 69 73 74 72 69 62 75 74 69 6f 6e 2e 0a 0a 20 |distribution... |
00000c90 20 20 54 68 69 73 20 73 6f 66 74 77 61 72 65 20 | This software |
00000ca0 69 73 20 73 75 70 70 6c 69 65 64 20 94 61 73 a0 |is supplied .as.|
00000cb0 69 73 95 3a 20 49 20 6d 61 6b 65 20 6e 6f 20 77 |is.: I make no w|
00000cc0 61 72 72 61 6e 74 79 2c 20 65 78 70 72 65 73 73 |arranty, express|
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00000ce0 66 20 74 68 65 20 6d 65 72 63 68 61 6e 74 61 62 |f the merchantab|
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00000d00 66 74 77 61 72 65 20 6f 72 20 69 74 73 20 9e 74 |ftware or its .t|
00000d10 6e 65 73 73 20 66 6f 72 20 61 6e 79 0a 70 61 72 |ness for any.par|
00000d20 74 69 63 75 6c 61 72 20 70 75 72 70 6f 73 65 2e |ticular purpose.|
00000d30 20 49 6e 20 6e 6f 20 63 69 72 63 75 6d 73 74 61 | In no circumsta|
00000d40 6e 63 65 73 20 73 68 61 6c 6c 20 49 20 62 65 20 |nces shall I be |
00000d50 6c 69 61 62 6c 65 20 66 6f 72 20 61 6e 79 20 64 |liable for any d|
00000d60 61 6d 61 67 65 2c 0a 6c 6f 73 73 20 6f 66 20 70 |amage,.loss of p|
00000d70 72 6f 9e 74 73 2c 20 6f 72 20 61 6e 79 20 69 6e |ro.ts, or any in|
00000d80 64 69 72 65 63 74 20 6f 72 20 63 6f 6e 73 65 71 |direct or conseq|
00000d90 75 65 6e 74 69 61 6c 20 6c 6f 73 73 20 61 72 69 |uential loss ari|
00000da0 73 69 6e 67 20 6f 75 74 20 6f 66 20 74 68 65 20 |sing out of the |
00000db0 75 73 65 0a 6f 66 20 74 68 69 73 20 73 6f 66 74 |use.of this soft|
00000dc0 77 61 72 65 20 6f 72 20 69 6e 61 62 69 6c 69 74 |ware or inabilit|
00000dd0 79 20 74 6f 20 75 73 65 20 74 68 69 73 20 73 6f |y to use this so|
00000de0 66 74 77 61 72 65 2c 20 65 76 65 6e 20 69 66 20 |ftware, even if |
00000df0 49 20 68 61 76 65 20 62 65 65 6e 0a 61 64 76 69 |I have been.advi|
00000e00 73 65 64 20 6f 66 20 74 68 65 20 70 6f 73 73 69 |sed of the possi|
00000e10 62 69 6c 69 74 79 20 6f 66 20 73 75 63 68 20 6c |bility of such l|
00000e20 6f 73 73 2e 0a 0a 20 20 20 49 6e 20 6f 74 68 65 |oss... In othe|
00000e30 72 20 77 6f 72 64 73 2c 20 69 66 20 79 6f 75 72 |r words, if your|
00000e40 20 63 6f 6d 70 75 74 65 72 20 63 72 61 73 68 65 | computer crashe|
00000e50 73 2c 20 62 6c 6f 77 73 20 75 70 2c 20 79 6f 75 |s, blows up, you|
00000e60 20 6c 6f 73 65 20 61 6c 6c 20 79 6f 75 72 20 77 | lose all your w|
00000e70 6f 72 6b 0a 65 74 63 2e 20 61 6c 6c 20 62 65 63 |ork.etc. all bec|
00000e80 61 75 73 65 20 6f 66 20 21 50 6e 67 32 53 70 72 |ause of !Png2Spr|
00000e90 2c 20 64 6f 6e 91 74 20 62 6c 61 6d 65 20 6d 65 |, don.t blame me|
00000ea0 2e 0a 0a 41 63 6b 6e 6f 77 6c 65 64 67 6d 65 6e |...Acknowledgmen|
00000eb0 74 73 0a 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |ts.-------------|
00000ec0 2d 2d 0a 0a 54 68 61 6e 6b 73 20 61 72 65 20 64 |--..Thanks are d|
00000ed0 75 65 20 74 6f 3a 0a 0a 47 72 65 67 20 52 6f 65 |ue to:..Greg Roe|
00000ee0 6c 6f 66 73 2c 20 66 6f 72 20 62 65 69 6e 67 20 |lofs, for being |
00000ef0 68 65 6c 70 66 75 6c 0a 0a 4e 69 63 6b 20 53 6d |helpful..Nick Sm|
00000f00 69 74 68 2c 20 41 4e 54 20 4c 74 64 2c 20 66 6f |ith, ANT Ltd, fo|
00000f10 72 20 73 65 6e 64 69 6e 67 20 6d 65 20 74 68 65 |r sending me the|
00000f20 20 6f 66 66 69 63 69 61 6c 20 50 4e 47 20 73 70 | official PNG sp|
00000f30 72 69 74 65 73 20 61 6e 64 20 70 6f 69 6e 74 69 |rites and pointi|
00000f40 6e 67 20 6f 75 74 0a 74 68 61 74 20 49 20 63 61 |ng out.that I ca|
00000f50 6e 27 74 20 73 70 65 6c 6c 20 6d 79 20 6f 77 6e |n't spell my own|
00000f60 20 6e 61 6d 65 2e 0a 0a 4e 69 63 6b 20 52 6f 62 | name...Nick Rob|
00000f70 65 72 74 73 20 28 22 74 69 67 67 65 72 40 61 72 |erts ("tigger@ar|
00000f80 67 6f 6e 65 74 2e 63 6f 2e 75 6b 22 29 20 66 6f |gonet.co.uk") fo|
00000f90 72 20 75 73 69 6e 67 20 74 68 65 20 70 72 6f 67 |r using the prog|
00000fa0 72 61 6d 20 61 6e 64 20 6d 61 6b 69 6e 67 20 73 |ram and making s|
00000fb0 6f 6d 65 0a 73 75 67 67 65 73 74 69 6f 6e 73 20 |ome.suggestions |
00000fc0 74 6f 20 69 6d 70 72 6f 76 65 20 69 74 2e 0a 0a |to improve it...|
00000fd0 53 74 65 77 61 72 74 20 42 72 6f 64 69 65 20 66 |Stewart Brodie f|
00000fe0 6f 72 20 64 6f 69 6e 67 20 6d 75 63 68 20 74 68 |or doing much th|
00000ff0 65 20 73 61 6d 65 0a 0a 54 68 65 20 70 72 6f 64 |e same..The prod|
00001000 75 63 65 72 73 20 6f 66 20 74 68 65 20 5a 6c 69 |ucers of the Zli|
00001010 62 20 26 20 50 4e 47 20 73 75 70 70 6f 72 74 20 |b & PNG support |
00001020 6c 69 62 72 61 72 69 65 73 0a 0a 43 6f 70 79 72 |libraries..Copyr|
00001030 69 67 68 74 73 0a 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |ights.==========|
00001040 0a 0a 54 68 65 20 50 4e 47 20 73 75 70 70 6f 72 |..The PNG suppor|
00001050 74 20 6c 69 62 72 61 72 79 20 28 6c 69 62 70 6e |t library (libpn|
00001060 67 29 20 69 73 20 63 6f 70 79 72 69 67 68 74 20 |g) is copyright |
00001070 61 73 20 66 6f 6c 6c 6f 77 73 3a 0a 20 20 20 43 |as follows:. C|
00001080 6f 70 79 72 69 67 68 74 20 28 63 29 20 31 39 39 |opyright (c) 199|
00001090 35 2c 20 31 39 39 36 20 47 75 79 20 45 72 69 63 |5, 1996 Guy Eric|
000010a0 20 53 63 68 61 6c 6e 61 74 2c 20 47 72 6f 75 70 | Schalnat, Group|
000010b0 20 34 32 2c 20 49 6e 63 2e 0a 20 20 20 43 6f 70 | 42, Inc.. Cop|
000010c0 79 72 69 67 68 74 20 28 63 29 20 31 39 39 36 2c |yright (c) 1996,|
000010d0 20 31 39 39 37 20 41 6e 64 72 65 61 73 20 44 69 | 1997 Andreas Di|
000010e0 6c 67 65 72 0a 20 20 20 47 75 79 20 45 72 69 63 |lger. Guy Eric|
000010f0 20 53 63 68 61 6c 6e 61 74 2c 20 47 72 6f 75 70 | Schalnat, Group|
00001100 20 34 32 2c 20 49 6e 63 2e 0a 20 20 20 43 6f 6e | 42, Inc.. Con|
00001110 74 72 69 62 75 74 69 6e 67 20 41 75 74 68 6f 72 |tributing Author|
00001120 73 3a 0a 20 20 20 20 20 20 4a 6f 68 6e 20 42 6f |s:. John Bo|
00001130 77 6c 65 72 0a 20 20 20 20 20 20 53 61 6d 20 42 |wler. Sam B|
00001140 75 73 68 65 6c 6c 0a 20 20 20 20 20 20 4b 65 76 |ushell. Kev|
00001150 69 6e 20 42 72 61 63 65 79 0a 20 20 20 20 20 20 |in Bracey. |
00001160 41 6e 64 72 65 61 73 20 44 69 6c 67 65 72 0a 20 |Andreas Dilger. |
00001170 20 20 20 20 20 4d 61 67 6e 75 73 20 48 6f 6c 6d | Magnus Holm|
00001180 67 72 65 6e 0a 20 20 20 20 20 20 44 61 76 65 20 |gren. Dave |
00001190 4d 61 72 74 69 6e 64 61 6c 65 0a 20 20 20 20 20 |Martindale. |
000011a0 20 47 72 65 67 20 52 6f 65 6c 6f 66 73 0a 20 20 | Greg Roelofs. |
000011b0 20 20 20 20 47 75 79 20 45 72 69 63 20 53 63 68 | Guy Eric Sch|
000011c0 61 6c 6e 61 74 0a 20 20 20 20 20 20 50 61 75 6c |alnat. Paul|
000011d0 20 53 63 68 6d 69 64 74 0a 20 20 20 20 20 20 54 | Schmidt. T|
000011e0 6f 6d 20 54 61 6e 6e 65 72 0a 20 20 20 20 20 20 |om Tanner. |
000011f0 54 69 6d 20 57 65 67 6e 65 72 0a 0a 54 68 65 20 |Tim Wegner..The |
00001200 69 6e 66 6c 61 74 65 20 2f 20 64 65 66 6c 61 74 |inflate / deflat|
00001210 65 20 73 75 70 70 6f 72 74 20 6c 69 62 72 61 72 |e support librar|
00001220 79 20 28 7a 6c 69 62 29 20 69 73 20 63 6f 70 79 |y (zlib) is copy|
00001230 72 69 67 68 74 20 61 73 20 66 6f 6c 6c 6f 77 73 |right as follows|
00001240 3a 0a 20 20 20 43 6f 70 79 72 69 67 68 74 20 28 |:. Copyright (|
00001250 63 29 20 31 39 39 35 2d 31 39 39 36 20 4a 65 61 |c) 1995-1996 Jea|
00001260 6e 2d 6c 6f 75 70 20 47 61 69 6c 6c 79 20 61 6e |n-loup Gailly an|
00001270 64 20 4d 61 72 6b 20 41 64 6c 65 72 0a |d Mark Adler.|
0000127d 
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