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HeartWare
Denmark
48 Posts |
 Posted - Apr 11 2024 : 23:46:24
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| If I have an image, say 256x256, and I want to "mask out" the surrounding area so that only a circle of radius 256 pixels is shown in a TImageEnView component (sort of like the common way to display avatars on various online sites), how would I do this? |
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xequte
38341 Posts |
Posted - Apr 12 2024 : 02:13:05
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Hi
You can make a perfectly circular crop using:
https://www.imageen.com/help/TImageEnProc.Crop.html
sz := imin( ImageEnView1.IEBitmap.Width, ImageEnView1.IEBitmap.Height );
x := ( ImageEnView1.Bitmap.Width - sz ) div 2;
y := ( ImageEnView1.Bitmap.Height - sz ) div 2;
ImageEnView1.Proc.Crop( x, y, x + sz, y + sz, iesEllipse );
Nigel
Xequte Software
www.imageen.com
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HeartWare
Denmark
48 Posts |
Posted - Apr 12 2024 : 02:41:59
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"There is no overloaded version of 'Crop' that can be called with these arguments"
on the line:
Avatar.Proc.Crop(0,0,Avatar.Bitmap.Width,Avatar.Bitmap.Height,TIEShape.iesEllipse);
where
Avatar : TImageEnView;
Using: ImageEn Build 13.0.0.27.7132 @ 15-Nov-23 10:54:47
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HeartWare
Denmark
48 Posts |
Posted - Apr 12 2024 : 03:10:36
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| Okay - installed v13.1 that I had lying around, but hadn't installed yet, and it now compiles. |
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xequte
38341 Posts |
Posted - Apr 12 2024 : 15:58:26
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Hi
Yes, it was introduced in 13.1.0. Also in the upcoming release you can force a perfect circle.
Nigel
Xequte Software
www.imageen.com
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HeartWare
Denmark
48 Posts |
Posted - Jun 28 2024 : 02:03:36
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How do I extract the processed image and save it as a transparent PNG file? I've tried
Image.Bitmap.SaveToFile(...)
but the cut out area is not transparent. Have also tried "upgrading" the BitMap to 32-bit, fiddle around with Image.Proc.SetTransparentColor and other stuff, but can't get it to save the proper .PNG file with the transparency.. |
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xequte
38341 Posts |
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HeartWare
Denmark
48 Posts |
Posted - Jun 28 2024 : 07:40:22
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Ah, yeah. The one thing I didn't try 
I was focused on the Bitmap itself...
Thank you... |
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xequte
38341 Posts |
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Generating circular image
