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- ============================== Icon 1.0 ==============================
- ======================================================================
- An icon program designed to create icons, written by Olaf 'Olsen'
- Barthel of MXM. Copyright, © 1990 by MXM. Shareware, all rights
- reserved. No guarantee of any kind is made that the program(s)
- described in this document are 100% reliable. You use this material
- on your own risk.
-
- ============================== Purpose ===============================
- ======================================================================
- The new Workbench 2.0 will display `All Files' contained in a
- directory if told to do so. Unfortunately, only two types of icons
- will be displayed for standard files: a tool icon (for those files
- which have the `executable' protection bit set and a project icon (for
- those files which have the `executable' bit cleared). This doesn't
- make it too easy to distinguish between the different file types
- (text, archive files, iff-pictures, etc). The Amiga isn't a MacIntosh
- on which each file has its icon built into the file structure.
- `Icon' is a more or less easy hack which supplies `fake' icons for
- each file that does not have it's own icon.
-
- =============================== Usage ================================
- ======================================================================
- `Icon' cannot be started from Workbench and should be called from the
- s:user-startup script (echo >>s:user-startup Icon). 41 different
- icons (more or less pretty) are supplied and should be copied to
- ENVARC:sys (copy icons envarc:sys). The s:startup-sequence script
- will copy these files to ENV:sys where `Icon' expects them to reside.
- If your hard disk does not have enough space left for all these icons
- copy only those icons you will need, `Icon' is smart enough to notice
- which icons are available and which are not.
- The default icons may be edited and changed in any way (you may
- want to set the default tools for example) but take care that you
- _never_ perform a `Snapshot' on them. Should this happen, fake icons
- created by `Icon' will appear to be `nailed' to a specific location.
- To avoid this effect, select the approriate icon in the ENVARC:sys
- drawer and `UnSnapshot' it.
-
- ============================ How it works ============================
- ======================================================================
- `Icon' patches a couple of system functions to make Workbench believe
- that there is an icon file for each file which does not have an icon.
- I do not expect the way this is accomplished to work under any future
- Workbench release, but as far as I can see it works fine under
- Kickstart 37.74. The source code of this program is included to make
- it easier to adapt it to future operating system releases.
- `Icon' determines the type of a file by taking a look at the first
- 400 bytes. A few magic numbers are checked and, if this fails, `Icon'
- evaluates how many of these 400 bytes are actually ASCII characters.
- 75% are the minimum for a plain ASCII text file. While this method is
- not perfect it has scored a lot of hits. If you come across a better
- method which does not involve too much time (reading 400 bytes forces
- only a single data block to be read) please tell me.
- Since system functions once patched cannot be safely restored I
- suggest leaving `Icon' active once it has been activated. If you're
- bold and daring, try calling `Icon' a second time to remove it.
-
- =============================== Author ===============================
- ======================================================================
- This program was written by Olaf Barthel of MXM. All files have been
- placed in the public domain. You may freely distribute this material,
- even a small copy fee is okay but everything which looks like
- commercial distribution is forbidden. Still you may use this material
- for software development without giving credit to the original author.
-
- Send new program revisions, comments, bug reports, donations,
- unmarried sisters, non-poisoned candy, home-grown palm trees,
- horoscopes, promising capital investments, etc. to:
-
- Olaf Barthel, MXM
- Brabeckstrasse 35
- D-3000 Hannover 71
-
- Federal Republic of Germany
-
- ============ Revision history (most recent change first) =============
- ======================================================================
- V1.0 First public release.
-