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Date Posted: 07:13:58 04/19/04 Mon
Author: Michel
Subject: Re: Memory usage
In reply to: Mike B 's message, "Memory usage" on 12:59:40 04/15/04 Thu


Hi Mike,

I am aware of this, but have not found the best solution yet. Since annotations have been introduced the memory consumption has increased because the annotations are drawned on the displayed graphic, so the displayed graphic cannot be for example, black and white.

It has been suggested to use TImage directly but then you lose the features of the TImageScrollBox.

The ideal solution is to break down the image into tiles and only work with it one "tile" at a time, but this is very complex, for displaying and applying transformations.

A possible option is to have an option in TImageScrollBox to work in a more lightweight mode, without annotations and possibly removing some other features. Or, another display component with less features. What are you requirements?

Best regards,

Michel

>I know this has probably been covered many times
>before, but I need to know some options. Envision
>uses massive amounts of memory (depending on image
>size, of course). I understand that it is because the
>entire image is in memory, but this is killing me.
>Opening a given map in my software at 100% is using
>upwards of 350MB of memory in the task manager. Using
>a competitors software, the same image uses about 48MB
>- zooming does not effect this. Otherwise their
>software sucks, but there is no way mine is going to
>work worth a damn on anything but high end computers.
> So how do they do that and what are my options with
>Delphi? Thanks.

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