From: Kenneth Graunke <kenneth@whitecape.org>
Date: Sun, 20 Feb 2011 00:48:24 +0000 (-0800)
Subject: i965/fs: Correctly set up gl_FragCoord.w on Sandybridge.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4a3b28113c3d23ba21bb8b8f5ebab7c567083a6d;p=mesa.git

i965/fs: Correctly set up gl_FragCoord.w on Sandybridge.

pixel_w is the final result; wpos_w is used on gen4 to compute it.

NOTE: This is a candidate for the 7.10 branch.

Reviewed-by: Eric Anholt <eric@anholt.net>
---

diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index c6c64972cd3..30e3bd54469 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -494,7 +494,7 @@ fs_visitor::emit_fragcoord_interpolation(ir_variable *ir)
    wpos.reg_offset++;
 
    /* gl_FragCoord.w: Already set up in emit_interpolation */
-   emit(fs_inst(BRW_OPCODE_MOV, wpos, this->wpos_w));
+   emit(fs_inst(BRW_OPCODE_MOV, wpos, this->pixel_w));
 
    return reg;
 }