how to handle transparent parts of layers?

Comments and discussions about 8bf plugins which can be use in various applications like Photoshop, Paint Shop Pro or Photo-Paint
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how to handle transparent parts of layers?

Postby rgreene » Thu Aug 31, 2006 8:37 am

Does anyone know the right way to handle layers in a filter plugin so as to preserve the colors at the semi-transparent edges of the opaque parts of a layer?

It seems the inData I get from the plugin host (Photoshop or PSP) already has the image composited (based on the alpha channel) with a white background. So even if I just copy all the RGB and alpha data I get from inData back to outData, I end up with light-colored edges around the non-transparent parts of the layer. Telling the host that I only want to handle the RGB planes (by setting inHiPlane=outHiPlane=3) doesn't seem to work either. :cry:

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Postby HaraldHeim » Thu Aug 31, 2006 1:01 pm

Best ask such questions on the Adobe SDK mailing list. To join send an email to and put subscribe in the subject line.

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