By enabling FLAT shading I get a really large speedup:
======================================================================
*** /tmp/gamma.c Sat Jun 5 16:32:58 1999
--- gamma.c Sat Jun 5 16:33:13 1999
***************
*** 38,41 ****
--- 38,42 ----
glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
glMatrixMode(GL_MODELVIEW);
+ glShadeModel(GL_FLAT);
}
======================================================================
I think rendering of Rects should always take place with flat rendering,
because smooth rendering doesn't make sense because it's impossible to
specify different colors/normals for the vertices. One possible solution
would be saving ctx->Light.ShadeModel, setting it to GL_FLAT, render the rect
and restore it. Did I miss something ? Maybe fogging ?
======================================================================
*** /tmp/rect.c.old Sat Jun 5 17:06:28 1999
--- rect.c Sat Jun 5 17:06:38 1999
***************
*** 60,71 ****
--- 60,76 ----
* flushes the vb...
*/
+ GLenum oldshademode;
+
ASSERT_OUTSIDE_BEGIN_END(ctx, "glRect");
RESET_IMMEDIATE(ctx);
+ oldshademode = ctx->Light.ShadeModel;
+ gl_ShadeModel( ctx, GL_FLAT );
gl_Begin( ctx, GL_QUADS );
gl_Vertex2f( ctx, x1, y1 );
gl_Vertex2f( ctx, x2, y1 );
gl_Vertex2f( ctx, x2, y2 );
gl_Vertex2f( ctx, x1, y2 );
gl_End( ctx );
+ gl_ShadeModel( ctx, oldshademode );
}
======================================================================
This if course makes the patch to gamma.c useless.
BTW, referring to the TODO in rect.c: calling Driver->RectFunc() is
only possible if the projection and modelview matrices are orthogonal, right ?
--
|/
|\ai
---------------------------------------------------------------------
Kai Schuetz
mailto:[EMAIL PROTECTED]
Hi, I'm not a signature virus. Why don't you just copy me into your
signature?
---------------------------------------------------------------------
_______________________________________________
Mesa-dev maillist - [EMAIL PROTECTED]
http://lists.mesa3d.org/mailman/listinfo/mesa-dev
