i965: Write gl_FragCoord directly to the destination.

This patch makes emit_general_interpolation take a destination register
as an argument, and write directly to that.  This is simpler than the
old approach of ralloc'ing a register, writing to that temporary, and
then making the caller emit per-component MOVs to copy it to the actual
destination.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Timothy Arceri <timothy.arceri@collabora.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_fs.h b/src/mesa/drivers/dri/i965/brw_fs.h
index 29c13cd..7998f51 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.h
+++ b/src/mesa/drivers/dri/i965/brw_fs.h
@@ -169,7 +169,7 @@ public:
 
    void emit_dummy_fs();
    void emit_repclear_shader();
-   fs_reg *emit_fragcoord_interpolation();
+   void emit_fragcoord_interpolation(fs_reg wpos);
    fs_reg *emit_frontfacing_interpolation();
    fs_reg *emit_samplepos_setup();
    fs_reg *emit_sampleid_setup();