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- This file lists bugs that may impede your use of PMView. Bugs in PMView are
- listed first, followed by known bugs in OS/2.
-
- PMVIEW BUGS:
- If you try to delete an image by dragging it from the File Open
- container to the shredder, you will hear the sound of the shredder, but
- the file will *not* be deleted. Fixing this bug will require completely
- changing PMView's WPS support. We *will* do it, but it may not happen
- for a few versions. For now, please use the Del key, or the _Delete...
- right-mouse-button command.
-
- There are no other known bugs in PMView 0.86b. We welcome any and all
- bug reports at sthiagar@nickel.ucs.indiana.edu.
-
- * * *
-
- OS/2 BUGS:
- Everything from here on is a bug in OS/2 and *not* in PMView.
-
- PROBLEMS WITH SPECIFIC OS/2 VERSIONS:
- For best results, you should run PMView under the generally available
- version of OS/2 2.1. This version fixes many screen driver bugs in
- OS/2. The *second* Service Pack for OS/2 2.0 is also reputed to fix
- these bugs, but we have not tried it.
-
- We do not recommend that you run PMView under other OS/2 variants.
- While you cannot "damage" your system, the screen driver bugs may give
- disappointing performance.
-
- GENERAL OS/2 BUGS:
- As of this writing, OS/2 does *not* recover very gracefully if you run
- out of swap space. Running *many* copies of PMView while viewing big
- images may get you in trouble. (Remember, a 1024x768x256 image
- represents 768K of pixel data alone!) Also, turning on color counting
- (on the "_Color" page of the options notebook) can increase your RAM
- requirements significantly. (Even an "optimal" 24-bit color counting
- algorithm can take up to 2MB RAM if it is fed an image with the maximum
- number of colors.)
-
- There's also a "feature" of OS/2's WPS that you might want to know
- about. Suppose you associate *.GIF files with PMView. This means that
- you'll be able to double-click on a *.GIF file (when you have a drives
- object open, for instance) and PMView will start up and display that
- file. The "feature" is this: If you start up PMView this way and then
- do a _File _Delete, OS/2 will kill PMView shortly after the file gets
- deleted. If there is sufficient interest, Peter will try to write a
- workaround.
-
- OS/2 SCREEN DRIVER BUGS:
- On some machines, the desktop icons will occasionally "bleed through"
- and be visible when the shouldn't be. We have not found any pattern to
- this bug, except that it seems to occur more often on faster machines.
-
- If you run under a screen driver that does not support Palette Manager,
- you won't get very good results. As of this writing, the 32-bit
- 256-color drivers for the XGA, ET4000, Trident, and ThinkPad 700C are
- known to support Palette Manager. (These drivers are available in the
- Service Pack or OS/2 2.1.) I am told that OS/2 2.1 includes Palette
- Manager support for several other adapters, including the 8514/a.
-
- If you are running the release version of OS/2 2.1, you can stop
- reading: ALL of the bugs listed below have been fixed. (Way to go,
- IBM!) If you are still running OS/2 2.0 + SP, or an OS/2 2.1 beta
- version, keep reading. The surest fix for these bugs is to acquire the
- release version of OS/2 2.1. A lower-cost alternative might be to
- acquire the second Service Pack for OS/2 2.0, but we have not tested
- this ourselves.
-
- THE UNIVERSAL BUG:
- When you drop a menu down over a window that's using Palette Manager,
- the obscured part of the window will later be redrawn with the wrong
- colors. This is (partly) why we have the F5 function.
-
- THE FATAL ET4000 / TRIDENT SERVICE PACK BUG:
- If you're using the Service Pack, and if you run a program (*any*
- program, not just PMView) that changes the screen palette and then try
- to move an icon on the OS/2 desktop, YOUR COMPUTER WILL HANG!!! Be
- *very* careful if you want to try this out. This bug occurs on ET4000
- systems using the Service Pack screen driver. It also occurs on Trident
- systems using the Service Pack and the screen driver that was
- distributed shortly afterwards. This bug is fixed in the December 2.1
- beta and, of course, in the release version of OS/2 2.1.
-
- This bug does *not* occur on the XGA, nor on the ThinkPad 700C.
-
- ET4000 / TRIDENT / THINKPAD SCALING BUGS:
- The screen drivers for the ET4000, Trident 8900C, and ThinkPad do not
- scale paletted bitmaps correctly. This is why we have our own scaling
- routines built into PMView. You can disable these routines (by
- selecting _View S_ettings, going to the Spe_cial page, and unchecking
- the "Use PMView's _own scaling routines") to see the bugs firsthand.
-
- Raja Thiagarajan / BUGS.DOC / 2-9-94 release
-