Image Display Issues on Win XP

Bill Marriott wjm at
Mon Dec 19 14:55:37 EST 2005

For performance and reliability (the problem you are seeing is almost 
certainly the result of memory management trouble) I would create an actual 
75x50 pixel thumbnail (not shrink a 5 megapixel image) for the opening page 
and link to the full image as a discreet file on disk.

- Loading multiple megapixel images is sure to gobble up tons of RAM
- Keeping images on disk preserves ability to work with graphic apps easily, 
as well as Windows Explorer thumbnails, etc.
- Keeping images outside of the stack minimizes potential for corruption


"Rob Cozens" <rcozens at> wrote in message 
news: at
> Hi All,
> I have a stack displaying my wife's artistic creations.
> The basic design is:
> Title Card
> About Card
> Art Card 1
> ...
> Art Card n
> Photo Index
> Each Art Card contains one to six 5MPix jpeg images locked in 75x50 
> "thumbnail" size & position.  Selecting an image copies it to a larger 
> "main image" at a size based on current card dimensions.  From there the 
> viewer can enlarge the main image [under a "frame"] to view detail and 
> move a scaled "position box" over the thumbnail to traverse the main 
> image.  All images have alwaysBuffer set to true.
> The Photo Index Card contains one button for each Art Card, with the icon 
> id set to the id of the curently-selected thumbnail image of the pertinent 
> card.
> The stack was originally created in v2.1.2 on MacOSX, with no problems 
> except the inordinate amount of time it takes to open the Photo Index 
> Card.  It was compressed/decompressed before/after transfer.
> In v2.6.1 on Win XP, sometimes the images are not displayed when an Art 
> Card is opened, and the Photo Index Card shows the icons for the first six 
> Art Cards plus the Art Card from which one navigated to the Index, only6.
> I seem to recall some discussion along this line; but a Bugzilla search 
> for image visibility & alwaysBuffer came up zip.
> Suggestions, anyone?
> Rob Cozens CCW
> Serendipity Software Company
> "And I, which was two fooles, do so grow three;
>  Who are a little wise, the best fooles bee."
>  from "The Triple Foole" by John Donne (1572-1631)
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