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Date Posted: 21:11:37 10/29/00 Sun
Author: Michel
Subject: Re: Get DIB Failed
In reply to: James Wendell 's message, "Re: Get DIB Failed" on 12:03:00 10/27/00 Fri


Hi James,

Yes, could you please send me sample files, and a minimal sample project that has this behavior.

Martin project is in CBuilder, and I have not yet reproduced it, without his source bmp images.

For some images appearing as blank rectangles, this is probably the windows API call, CreateDibSection failing with large images. I have not found any work around to that, other than using WinNT or 2000, which seem to have higher limits on image sizes.

Best regards,

Michel


> I have tried using both 0 and 1 when I load the images
> into memory for my thumbnail program. In either case,
> I can load about half of the images in a directory
> before I get the CreateDibGraphic failure message.
> Basically I create a TDibGraphic, resize it using a
> TResizeTransform, and then assign the resized graphic
> to a TImageScrollBox. I then free the original
> TDibGraphic and TResizeTransform. I am using Delphi 5,
> but the procedure should be the same as for C-Builder.
> I am using your demo project as the basis for the
> thumbnail program.
> The images I am using are straight from my digital
> camera, at a JPEG resolution of 2048x1536 and a file
> size of less than 1 MB. I also have noticed that
> larger images cause the same error message using your
> demo program as you shipped it. I suspect you have a
> problem with the TDibGraphic class. Again, I am using
> Win98 Second Edition. Using Win NT, I have NO PROBLEMS
> AT ALL - everything works OK????
> If you would like, I would be happy to send you the
> program files (not too big) and enough sample images,
> so that you can observe the problem directly. I am
> really disapointed at this point, as I bought your
> library with the hope of making my own thumbnail
> viewer program, and I have no clue as to why I am
> getting this error message so often. Thank you for
> your concern.

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