Image Display Issues on Win XP
wjm at wjm.org
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 pon.net> wrote in message
news:220.127.116.11.1.20051219104322.01967b38 at pon.net...
> 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
> 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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