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 IEN image extraction
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98 Posts

Posted - May 12 2022 :  14:00:23  Show Profile  Reply

I load a PNG (with transparency) in a TImage + an image layer and save it as IEN file.

Afterwards, when I load the IEN file I'ld like also to load the included PNG in the TImage.

Which is the correct way to extract the PNG (TIEBitmap) in order to load it as TBitmap in the TImage.Picture.Bitmap, including the transparency?



6969 Posts

Posted - May 12 2022 :  21:24:07  Show Profile  Reply
Hi Al

As long as the IEN_Compression is not a format like JPEG the compression will be maintained.

You can display a layer in a TImage as follows:

// Display a layer containing an image with alpha transparency in a TImage
iebmp := TIEBitmap.Create();
iebmp.Assign( ImageEnView1.Layers[3].Bitmap );
iebmp.SynchronizeRGBA( False, True ); // Convert 24bit Image + Alpha channel to 32bit RGBA
iebmp.CopyToTBitmap( Image1.Picture.Bitmap );
Image1.Picture.Bitmap.AlphaFormat := afDefined;

Xequte Software
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