this patch helps for the demo. but someone more familiar with radeon_vtxfmt should check if it really fixes all cases...
I think in case of GL_QUAD_STRIP we should check for 0, too. (and maybe for 1?)
--- radeon_vtxfmt.c_orig Fri Mar 21 17:22:23 2003 +++ radeon_vtxfmt.c Mon Mar 24 21:52:58 2003 @@ -312,6 +312,8 @@ return 2; } case GL_TRIANGLE_STRIP: + if (nr == 0) /* dont let verts go negative! */ + return 0; ovf = MIN2( nr-1, 2 ); for (i = 0 ; i < ovf ; i++) copy_vertex( rmesa, nr-ovf+i, tmp[i] );
Good catch!
I'll commit fixes for this.
Keith
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