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 ImageEn Library for Delphi, C++ and .Net
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 difference in Opacity
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john_siggy@yahoo.com

USA
158 Posts

Posted - Dec 25 2020 :  09:33:00  Show Profile  Reply
why is there a difference in Opacity between ImageEn and the Windows API ? Works for Max & Min Opacity values but values in the middle are darker with Windows API.


TIETextLayer(ImageEnVect2.CurrentLayer).Opacity := 1.0;
TIETextLayer(ImageEnVect2.CurrentLayer).FillOpacity := Opacity;



BlendFunc.SourceConstantAlpha := Opacity * 255;
Windows.AlphaBlend(Destination.Handle, X, Y, Source.Width, Source.Height,
Source.Canvas.Handle, 0, 0, Source.Width, Source.Height, BlendFunc);

Is There a ImageEn function to paint an opaque region ?

xequte

38627 Posts

Posted - Dec 28 2020 :  01:04:57  Show Profile  Reply
Hi

We don't use the Windows API to draw our opacity, so you may get different results with ImageEn.

Can you let me know more about what you are looking for with opaque query, do you mean with a TIECanvas?

Nigel
Xequte Software
www.imageen.com
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