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compiler/nir: extend lower_fragcoord_wtrans to support VARYING_SLOT_POS 

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Reviewed-by: Andreas Baierl <ichgeh@imkreisrum.de>
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6220>
This commit is contained in:
Gert Wollny 2020-07-06 09:41:25 +02:00 committed by Marge Bot
parent 7aaddf1a34
commit 418c4c0d7d
1 changed files with 8 additions and 3 deletions
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11
src/compiler/nir/nir_lower_fragcoord_wtrans.c
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@ -30,8 +30,6 @@
* gl_FragCoord.xyz = gl_FragCoord_orig.xyz
* gl_FragCoord.w = 1.0 / gl_FragCoord_orig.w
*
* To trigger the transformation, gl_FragCoord currently has to be treated
* as a system value with PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL enabled.
*/
static bool
@ -41,7 +39,14 @@ lower_fragcoord_wtrans_filter(const nir_instr *instr, UNUSED const void *_option
return false;
nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr);
return intr->intrinsic == nir_intrinsic_load_frag_coord;
if (intr->intrinsic == nir_intrinsic_load_frag_coord)
return true;
if (intr->intrinsic != nir_intrinsic_load_deref)
return false;
nir_variable *var = nir_intrinsic_get_var(intr, 0);
return var->data.location == VARYING_SLOT_POS;
}
static nir_ssa_def *