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Date Posted: 05:56:41 05/06/02 Mon
Author: Michel
Subject: Re: "GetDIB Failed" error with Envision 1.1 (Delphi 5)
In reply to: Jon Scott 's message, ""GetDIB Failed" error with Envision 1.1 (Delphi 5)" on 15:54:35 05/01/02 Wed


Hi Jon,

The correction is not yet the current beta code for version 2. In TDibGraphic.AssignFromBitmapHandle, replace the call to

GetMem(BitmapBits, ImageSize);

with,

BitmapBits := PByteArray(GlobalAlloc( GMEM_FIXED, ImageSize ));
if BitmapBits = nil then
raise EEnvisionError.Create('GlobalAlloc failed');


and in the finally block use,

GlobalFree(Windows.THandle(BitmapBits));

instead of

FreeMem(BitmapBits, ImageSize);

Best regards,

Michel



>Michel,
>
>I've sent you an email to michel@intervalsoftware.com
>with a BMP attachment and steps for the infamous
>"GetDIB Failed" error. Basically, the problem goes
>like this... I need to clear the TImageScrollBox at
>various times in my program, but doing this sometimes
>causes the error when attempting to load the same
>bitmap again. However, this ONLY happens when
>clearing the image control. This can be reproduced
>(on some bitmaps) with just two lines of code:
>
>ImageScrollBox.Clear;
>ImageScrollBox.LoadFromFile('C:\temp\somebmp.bmp', 1);
>
>Do this a few times and you'll get the error. I have
>yet to try v2 Beta. If you still have the problem in
>v2, what can I do to get around this problem?
>
>Thanks,
>Jon.

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