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 20:40:33 +0900

Thank you for your quick reply.

> If you use an OpenGL rendering context in the Motif window
Maybe yes. I referenced Performer sample c source "motif.c" when I make
 my program. I create ManagedWidget like below.

   Widget v_glwidget; /* performer drawing area */
   Widget V_frame_widget; /* Frame widget, parent of v_glwidget */
   XVisualInfo *vi;

   v_glwidget = XtVaCreateManagedWidget("v_glwidget",
   glwMDrawingAreaWidgetClass, V_frame_widget, GLwNvisualInfo, vi,
   NULL);

> you could introduce 50% alpha to the performer image in memory after
> you read from performer but before you glDrawPixels. Then you can enable
> blending and drawpixels with source_alpha, one_minus_source_alpha for
> the blend.
When I draw Performer image, I use pfFrame().
Must I do anything before pfFrame()? Or must I change some performer
configuration to use alpha blending?
=================================================
name :mitsugu isomura
company:mitsubishi precision co.
e-mail :mi_isomura++at++mpcnet.co.jp

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