ain@j.cc.purdue.edu (Patrick White) (05/17/88)
Submitted by: eric@ulysses.homer.nj.att.com (Eric Lavitsky[hmm])
Summary: Puts a 4-color picture on the Workbench Screen.
Poster Boy: Patrick White (ain@j.cc.purdue.edu)
Archive Name: binaries/amiga/volume5/dropcloth_2-3.sh.Z
tested.
NOTES:
works.
-- Pat White (co-moderator comp.sources/binaries.amiga)
ARPA/UUCP: j.cc.purdue.edu!ain BITNET: PATWHITE@PURCCVM PHONE: (317) 743-8421
U.S. Mail: 320 Brown St. apt. 406, West Lafayette, IN 47906
========================================
Here is the latest version of DropCloth - V2.3. It fixes the
bugs present in V2.2 (garbage at bottom of 640x200 pictures
in 640x400 screens and wierd behavior when no pattern is
specified). It is also much more solid than 2.2 in the way
it installs/de-installs itself.
Cheers,
Eric Lavitsky
ulysses!eric
# This is a shell archive. Remove anything before this line,
# then unpack it by saving it in a file and typing "sh file".
#
# Wrapped by hector!eric on Tue Feb 9 19:09:57 EST 1988
# Contents: dropcloth.uu readme
echo x - dropcloth.uu
sed 's/^@//' > "dropcloth.uu" <<'@//E*O*F dropcloth.uu//'
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end
@//E*O*F dropcloth.uu//
chmod u=rw,g=r,o=r dropcloth.uu
echo x - readme
sed 's/^@//' > "readme" <<'@//E*O*F readme//'
DropCloth
Version 2.3
By Eric Lavitsky
04-January-1988
(C) 1987 by Eric Lavitsky
DropCloth lets you place a pattern, a 2 bitplane IFF image or a
combination of a pattern and image into your Amiga's WorkBench
backdrop. If you are using ARC to unpack DropCloth, please do
the following from the CLI:
1> execute execute.me
this will rename all of the files in the archive to their proper
names.
To use DropCloth from the CLI, type:
1>dropcloth [-d number] [-i filename]
where "number" is between 0 and 64 inclusive and "filename" is a
valid 2 bitplane (4 color) IFF image file. The number specifies
the intensity of the pattern used for the backdrop, 0 will render
a clear pattern into the display, while 64 will render a solid
backdrop. If you don't specify a pattern, DropCloth will default
to 0, a clear pattern. To remove DropCloth and any pattern or image
it has rendered into the backdrop, simply run DropCloth a second
time. It is generally recommended that DropCloth be "RUN" or
"RUNBACKED" from the CLI.
To use DropCloth from the WorkBench:
Double click directly on the DropCloth Icon or
Double click on an IFF image Icon whose default
tool points to DropCloth.
The image must be an IFF image (ILBM). Change it's default tool to
point to DropCloth. Assuming DropCloth resides in the C: directory,
select the image icon and then select "Info" from the WorkBench menu.
The next to last field in the Icon is the default tool:
____________________________
DEFAULT TOOL | C:DropCloth |
----------------------------
If your image does not have an Icon, you may create an Icon for it by
copying one of the Icons normally created by DPaint. If you want
DropCloth to render a pattern, specify the pattern you want in the
ToolTypes of the DropCloth Icon (if you are rendering a pattern only)
or in the ToolTypes of the image Icon (if you are rendering an image
along with a pattern). Again, select the Icon in question, pull down
"Info" from the WorkBench menu, go down to the ToolTypes field, select
"ADD", click in the ToolTypes text gadget and enter:
_________________________________
|PATTERN=n |
---------------------------------
where n is again a number between 0 and 64 inclusive.
To remove dropcloth and any pattern or image it has rendered into the
WorkBench backdrop, simply run DropCloth a second time by double
clicking on it's Icon.
- Features and Limitations
- Current version wants 640x200x2 images - patterns work fine in any
size screen including "morerowed" (overscan) screens.
- Current version will accept 640x400x2 images - if you use a 640x200
image in an interlaced WorkBench, garbage will be rendered at the
bottom of the display.
- We make a few assumptions about the IFF image that limit us to
accepting only 2 bitplane images.
- The fuel gauge in main disk windows is not properly refreshed by
RefreshWindowFrame() ... (sigh)
- Requires V1.2 or greater of KickStart to run
- Future considerations
- We could give an option to add bitplanes to the workbench screen for
images > 2 bitplanes or try and map colors to 2 bitplanes. This would
slow things down and eat lots of CHIP memory (ugh!).
- Allow the user to select the pen number used to render the backdrop
pattern.
- Temporarily change WorkBench colors to that of the image being
rendered and restore the old colors upon exit.
- V 2.3 Fixes
- Fixed bug where disk icons weren't correctly refreshed when no
pattern was selected to be rendered.
- Garbage is no longer rendered into the display when a picture of
resolution lower than the WorkBench screen is rendered.
GENERAL INFO
- How it started
- When I first got my Amiga way back in August '85, I was
dissapointed to find that I couldn't put an image or pattern in my
backdrop like we could on the AI workstations and Macintoshes at Rutgers.
- One day, someone posted on the net that at a gathering in the
Apple Computer cafeteria one day, Andy Hertzfeld, of Macintosh design
team fame, was quoted as saying that the Amiga wasn't a serious machine:
"C'mon, a user interface with windows the same color as the screen?!!!".
I vowed that one day, I'd show him! :-)
- DropCloth is the answer to Hertzfeld's shortsighted remark.
Maybe one day, he'll realize what the Amiga is for it's true potential.
Remember, the Workbench is just another application - it can be greatly
enhanced or replaced (Can *you* say that about the Mac Finder?)
- What it does
- Things we had to realize about the workbench:
- The Workbench renders it's icons into a
backdrop borderless window.
- When an icon is moved SetRast() is called to
clear the layer and all the icons are redrawn.
This is fairly fast, but destroys anything you
render yourself into the backdrop.
- So, get the source to see how it's done! (plug, plug :-)
Thanks to:
Perry Kivolowitz - Spurring me on, helping fix my bugs
Jon Trudel - The DropCloth Icon
Andy Hertzfeld - The original incentive
Copyright and Shareware Notice:
DropCloth is Copyright 1987, 1988 by Eric Lavitsky. DropCloth is a
shareware product. If you feel this product enhances your environment,
please send a contribution to:
Eric Lavitsky
34 Maplehurst Ln.
Piscatway, NJ 08854
Keep the shareware concept alive! Suggested donation is $10. Donations
of $15 or more will yield a disk replete with the source code to the
latest version of DropCloth ($20 would be greatly appreciated). The
source code was written using Manx Aztec C, V3.6a (Yes Jim, a plug! :-),
remains proprietary to Eric Lavitsky and may not be redistributed or
sold without the expressed written consent of Eric Lavitsky. The
executable version of DropCloth and it's associated icons may be freely
redistributed provided this document is included in the distribution.
@//E*O*F readme//
chmod u=rw,g=rw,o=r readme
exit 0