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 After CopyObjectsToBack an annotation disappears		  New Topic  Reply to Topic
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rlange

Germany
26 Posts
Posted - Apr 26 2013 :  04:46:09  Show Profile  Reply
Steps to reproduce:

1. Open the attached TIFF file with TImageENVect
2. Place a text marker annotation (taken from demo program Annotations.dproj)

ImageEnVect1.MouseInteractVt := [miPutBox];
ImageEnVect1.ObjBoxHighlight[-1] := true;
ImageEnVect1.ObjBrushColor[-1] := clYellow;
ImageEnVect1.ObjBrushStyle[-1] := bsSolid;

3. Burn in the annotation with CopyObjectsToBack

ImageEnVect1.CopyObjectsToBack(true);
ImageEnVect1.RemoveAllObjects;

Now the PutBox is not visible any more.

What is the reason?
The TIFF file is fully colored (PixelFormat ie24RGB) and LZW compressed.

Here is the TIFF file (zipped):
http://www.imageen.com/ieforum/attach/rlange/201342643849_test1.zip

w2m

USA
1990 Posts
Posted - Apr 26 2013 :  07:54:31  Show Profile  Reply
ObjBoxHighlight creates an object with alpha = 0 so when you CopyObjectsToBack with a 32-bit image with alphachannel the box is invisible. If you change the pixelformat of the image to 24-bit the box will be visible. To make the ObjBoxHighlight visible with 32-bit use ImageEnVect1.CopyObjectsToBack(False, False, False);

William Miller
Adirondack Software & Graphics
Email: w2m@frontiernet.net
EBook: http://www.imageen.com/ebook/
Apprehend: http://www.frontiernet.net/~w2m/index.html
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rlange

Germany
26 Posts
Posted - Apr 29 2013 :  06:01:32  Show Profile  Reply
Thank you!
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