On 30 August 2011 12:34, Kenneth Graunke <<a href="mailto:kenneth@whitecape.org">kenneth@whitecape.org</a>> wrote: <div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> The fragment shader needs gl_Position.w in order to do interpolation. Both the comments above and the old VS backend emitted this. Fixes a ton of piglit tests on Ironlake with the new VS. </blockquote><div> I ran across this last week but was in the middle of other work and ran out of time to address it. Thanks for fixing it. Reviewed-by: Paul Berry <<a href="mailto:stereotype441@gmail.com">stereotype441@gmail.com</a>> </div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> Signed-off-by: Kenneth Graunke <<a href="mailto:kenneth@whitecape.org">kenneth@whitecape.org</a>> --- src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp index 4babc56..04c49da 100644 --- a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp +++ b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp @@ -1736,6 +1736,8 @@ vec4_visitor::emit_vue_header_gen4(int header_mrf) /* Pad so that vertex element data is aligned. */ header_mrf++; + + emit(BRW_OPCODE_MOV, brw_message_reg(header_mrf++), pos); } else { /* There are 8 dwords in VUE header pre-Ironlake: * dword 0-3 (m1) is indices, point width, clip flags. -- 1.7.6 _______________________________________________ mesa-dev mailing list <a href="mailto:mesa-dev@lists.freedesktop.org">mesa-dev@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/mesa-dev" target="_blank">http://lists.freedesktop.org/mailman/listinfo/mesa-dev</a> </blockquote></div>