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 Create transparent objBitmap
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shackers

United Kingdom
12 Posts

Posted - Feb 13 2020 :  09:30:26  Show Profile  Reply
I'm trying to add a bitmap object to an imageEnView with transparency.

This is what I have so far:

bmp.PixelFormat:=pf24bit;
bmp.assign(bmpIconNote);
bmp.TransparentMode:=tmAuto;
bmp.saveToFile(filename);
ImageEnV.setObjBitmapFromFile(hObj, fileName);
ImageEnV.ObjWidth[hOBJ]:=48;
ImageEnV.ObjHeight[hOBJ]:=48;
I
However, the image is not transparent. What do I need to do?

xequte

5522 Posts

Posted - Feb 13 2020 :  14:21:55  Show Profile  Reply
Hi

For a TBitmap to be transparent it must be 32bit. Even then I don't know that assigning an icon to it will copy the alpha information. You are probably better to work with TIEBitmap to generate a transparent image.

What is your source? If it is an icon file, you can just TIEBitmap.Read to load it with transparency.

Also, if you are starting on a new project, you should use TIELayers, not TImageEnVect objects, e.g.

ImageEnView1.LayersAdd( 'C:\myicon.ico' );

See:

https://www.imageen.com/help/TImageEnVect%20vs%20TIELayers.html

Nigel
Xequte Software
www.imageen.com
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shackers

United Kingdom
12 Posts

Posted - Feb 13 2020 :  14:43:58  Show Profile  Reply
Thanks Nigel.

I'll move to layers and it's easy enough for me to change the bitmap to an icon.
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