Re: [Mesa3d-users] Anti-aliasing lines Intel GMA 4500 question

[Stefan P. <sp...@sy...>]

Hi,

> I don't see any attachments.

Probable hidden a bit inside bugzilla.

Here you go:

  Ubuntu intel gma4500:
  http://systemdatarecorder.org:9009/bugzilla/attachment.cgi?id=1

  Solaris nvidia:
  http://systemdatarecorder.org:9009/bugzilla/attachment.cgi?id=2

> Are you talking about line antialiasing?

yep. Im just plotting the Barry coordinates using a simple sequence
like:

         /* Enable Anti-aliasing and width of axis */
         glEnable(GL_LINE_SMOOTH);
         glEnable(GL_BLEND);
         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
         /* glHint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE); */
         glHint(GL_LINE_SMOOTH_HINT, GL_NICEST);
         glLineWidth(0.5);


         glBegin(GL_LINES);

             /* draw axis */
             /* Usr Red */
 	    glColor3f (1.0f, 0.0f, 0.0f);
 	    glVertex2f(b3Vertex[1][0], b3Vertex[1][1]);
 	    glVertex2f(op_usr.x, op_usr.y);

             ...

         glEnd();

> I think the 4500 has some limitations w.r.t. antialiased lines.  You might 
> try settting the INTEL_STRICT_CONFORMANCE env var to 1 and see what happens. 
> This will turn on software-drawn AA lines.  Performance will be poor, 
> however.

thanks. I will try this. I will report back the results.

stefan

[1] http://www.systemdatarecorder.org/cpuplayer/src/cpuplayer.c