Mesa (master): llvmpipe: fix position offset interpolation
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Thu Jul 16 19:58:40 UTC 2020
Module: Mesa
Branch: master
Commit: e16f59c31621cdba819d7aed07d1457c838121bd
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=e16f59c31621cdba819d7aed07d1457c838121bd
Author: Dave Airlie <airlied at redhat.com>
Date: Mon Jul 13 15:44:24 2020 +1000
llvmpipe: fix position offset interpolation
pos offset only applies to the gl_FragPos input, when I refactored
I messed that up, only use pos_offset for the position inputs
and use 0.5 otherwise.
This fixes:
GTF-GL45.gtf30.GL3Tests.fragment_coord_conventions.fragment_coord_conventions_multisample
Reviewed-by: Roland Scheidegger <sroland at vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5926>
---
src/gallium/drivers/llvmpipe/lp_bld_interp.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_interp.c b/src/gallium/drivers/llvmpipe/lp_bld_interp.c
index 52ba7dbdd2a..7ec8bd13cbc 100644
--- a/src/gallium/drivers/llvmpipe/lp_bld_interp.c
+++ b/src/gallium/drivers/llvmpipe/lp_bld_interp.c
@@ -291,7 +291,7 @@ attribs_update_simple(struct lp_build_interp_soa_context *bld,
LLVMValueRef pixoffx;
LLVMValueRef pixoffy;
LLVMValueRef ptr;
- LLVMValueRef pix_center_offset = lp_build_const_vec(gallivm, coeff_bld->type, bld->pos_offset);
+ LLVMValueRef pix_center_offset = lp_build_const_vec(gallivm, coeff_bld->type, 0.5);
/* could do this with code-generated passed in pixel offsets too */
@@ -333,7 +333,7 @@ attribs_update_simple(struct lp_build_interp_soa_context *bld,
x_val_idx = lp_build_array_get(gallivm, bld->sample_pos_array, x_val_idx);
a = lp_build_broadcast_scalar(coeff_bld, x_val_idx);
} else {
- a = pix_center_offset;
+ a = lp_build_const_vec(gallivm, coeff_bld->type, bld->pos_offset);
}
}
else if (attrib == 0 && chan == 1) {
@@ -344,7 +344,7 @@ attribs_update_simple(struct lp_build_interp_soa_context *bld,
y_val_idx = lp_build_array_get(gallivm, bld->sample_pos_array, y_val_idx);
a = lp_build_broadcast_scalar(coeff_bld, y_val_idx);
} else {
- a = pix_center_offset;
+ a = lp_build_const_vec(gallivm, coeff_bld->type, bld->pos_offset);
}
}
else {
@@ -534,7 +534,7 @@ lp_build_interp_soa(struct lp_build_interp_soa_context *bld,
pixoffy = LLVMBuildFAdd(builder, pixoffy,
lp_build_broadcast_scalar(coeff_bld, bld->y), "");
- LLVMValueRef pix_center_offset = lp_build_const_vec(gallivm, coeff_bld->type, bld->pos_offset);
+ LLVMValueRef pix_center_offset = lp_build_const_vec(gallivm, coeff_bld->type, 0.5);
if (loc == TGSI_INTERPOLATE_LOC_CENTER) {
if (bld->coverage_samples > 1) {
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