Re[2]: How do I overlay Performer scene on X window grafic c

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ISOMURA_MITUGU (mi_isomura++at++mpcnet.co.jp)
Wed, 17 Jun 98 11:23:07 +0900

Thank you for your quick reply.

>> I use X window + Motif.
>> I want to draw picture image(Ximage format) to Motif graphic context
>> and I want to overlay Performer scene on it.
>> And Performer image must be half transparent.
>> Please advise me how to do.

> Would it make any sense to draw the performer scene first and then render
> the image with alpha on top of the scene?

First image is X window pixmap image. This is not created by performer.
Image is transferred form video signal(16mm film image ,VTR image etc.).
Second image is created by Performer. And Second one must be rendered with alpha
 on top of the scene.

                    _______________________________
                   / /
   Second image / Performer Scene /
                 / (half transparent) /
                / /
               /______________________________/
                         
                              +(alpha blending)
                  _______________________________
                 / /
   First image / picture image /
               / (Ximage format) /
              / (no transparent) /
             /______________________________/

 ==========================================================
     name :mitsugu isomura
     company:mitsubishi precision co.
     e-mail :mi_isomura++at++mpcnet.co.jp
      

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