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i965: Fix color interpolation on sandybridge

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Don't double store position in vertex attribute. This makes color
interpolation right by using barycentric coordinates.
This commit is contained in:
Zhenyu Wang 2010-09-17 12:57:35 +08:00
parent 8c31a4c3cf
commit 41c31c2ebd
1 changed files with 2 additions and 3 deletions
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5
src/mesa/drivers/dri/i965/brw_vs_emit.c
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@ -254,7 +254,7 @@ static void brw_vs_alloc_regs( struct brw_vs_compile *c )
c->first_overflow_output = 0;
if (intel->gen >= 6)
mrf = 4;
mrf = 3; /* no more pos store in attribute */
else if (intel->gen == 5)
mrf = 8;
else
@ -1451,8 +1451,7 @@ static void emit_vertex_write( struct brw_vs_compile *c)
* position.
*/
brw_MOV(p, brw_message_reg(2), pos);
brw_MOV(p, brw_message_reg(3), pos);
len_vertex_header = 2;
len_vertex_header = 1;
} else if (intel->gen == 5) {
/* There are 20 DWs (D0-D19) in VUE header on Ironlake:
* dword 0-3 (m1) of the header is indices, point width, clip flags.