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Date Posted: 07:54:28 05/22/01 Tue
Author: Michel
Subject: Re: problem in TDibGraphic.Assign
In reply to: wto 's message, "problem in TDibGraphic.Assign" on 10:27:00 05/21/01 Mon


Hi,

The handle type was changed to workaround a problem when assigning 16 bit bitmaps. I'll have to look into this in more detail before I do a change.

As a workaround, you may try loading your bitmap in a TBitmapGraphic instead of a TBitmap.

Best regards,

Michel

>you use following code in TDibGraphic.Assign:
>
> if (Source is TBitmap) then
> begin
> { AssignFromBitmapHandle reads the X and Y
>resolutions }
>
> { MB Oct 28, 1999. The AssignFromBitmapHandle
>works with a device
> dependent bitmap. This is required to load
>16 bit bitmaps, in order
> to convert them to 24 bits using the GetDIB
>function. }
> TBitmap(Source).HandleType := bmDDB;
>
>
>Self.AssignFromBitmapHandle(TBitmap(Source).Handle);
> end
>
>I don't know why you select to change the HandleType
>of the
>source bitmap since usually it is considered as a
>constant one and will not be changed in a
>AnotherGraphic.Assign(SourceBitmap) operation?

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