Mesa (9.1): i965/Gen4: Zero extra coordinates for ir_tex
Carl Worth
cworth at kemper.freedesktop.org
Wed Jul 31 05:45:20 UTC 2013
Module: Mesa
Branch: 9.1
Commit: 01b38d489c3dda7814873ba80df7d8918e8bce44
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=01b38d489c3dda7814873ba80df7d8918e8bce44
Author: Chris Forbes <chrisf at ijw.co.nz>
Date: Sun Jul 14 18:30:52 2013 +1200
i965/Gen4: Zero extra coordinates for ir_tex
We always emit U,V,R coordinates for this message, but the sampler gets
very angry if we pass garbage in the R coordinate for at least some
texture formats.
Fill the remaining coordinates with zero instead.
Fixes broken rendering on GM45 in Source games, and in VDrift.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=65236
NOTE: This is a candidate for stable branches.
Signed-off-by: Chris Forbes <chrisf at ijw.co.nz>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>
(cherry picked from commit 121ea0b38bfee093e0bde0ff1443fc2efec688b0)
---
src/mesa/drivers/dri/i965/brw_fs_visitor.cpp | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
index 3df4966..7276154 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
@@ -809,6 +809,10 @@ fs_visitor::emit_texture_gen4(ir_texture *ir, fs_reg dst, fs_reg coordinate,
emit(MOV(fs_reg(MRF, base_mrf + mlen + i), coordinate));
coordinate.reg_offset++;
}
+ /* zero the others. */
+ for (int i = ir->coordinate->type->vector_elements; i<3; i++) {
+ emit(MOV(fs_reg(MRF, base_mrf + mlen + i), fs_reg(0.0f)));
+ }
/* gen4's SIMD8 sampler always has the slots for u,v,r present. */
mlen += 3;
} else if (ir->op == ir_txd) {
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