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 Transparency issue when drawing on transparent layer

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T O P I C    R E V I E W
jiang_jiji Posted - Mar 30 2026 : 04:27:26
When 
TransparencyMode := ietmReplace
is set, drawing on a transparent layer appears opaque during the process and only becomes transparent after the drawing is completed.

ps. How add a transparent layer

ImageView.LayersAdd(ielkImage, 0, 0);
ImageView.IEBitmap.Fill(0, 0);


5   L A T E S T    R E P L I E S    (Newest First)
xequte Posted - Mar 31 2026 : 22:39:30
Sorry, I cannot say. There are many higher priority items.

Nigel
Xequte Software
www.imageen.com
jiang_jiji Posted - Mar 31 2026 : 22:06:17
If there are plans for this, which version is it expected to be released in? This would help me better plan my product timeline.
xequte Posted - Mar 31 2026 : 19:24:05
Hi

We'll look at improving this in a later update, as it will require a rewrite of the painting code.

Nigel
Xequte Software
www.imageen.com
jiang_jiji Posted - Mar 31 2026 : 04:26:50
1. Yes, that is limitation in the way the paint tool works (performance reasons).

Could you please let me know if there's a way to remove or adjust this limitation?

2. You just need to fill the alpha channel with 0 values, so the method you are using above should be fine

This step is fine. The problem is that it is only opaque during MouseDown, and turns transparent again after MouseUp.
xequte Posted - Mar 30 2026 : 17:46:12
Hi

1. Yes, that is limitation in the way the paint tool works (performance reasons).

2. You just need to fill the alpha channel with 0 values, so the method you are using above should be fine.

What are you seeing?

What is the size of the layer? Might need to call Allocate:

http://www.imageen.com/help/TIEBitmap.Allocate.html

Also, ensure you call update after changing the bitmap or layer properties:

ImageEnView1.Update();




Nigel
Xequte Software
www.imageen.com