gallivm: Allow to disable bri-linear filtering with GALLIVM_DEBUG=no_brilinear runtime option

3 files changed, 10 insertions, 9 deletions

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_debug.h b/src/gallium/auxiliary/gallivm/lp_bld_debug.h
index 369c1bbf09..eb11dcd4ef 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_debug.h
+++ b/src/gallium/auxiliary/gallivm/lp_bld_debug.h
@@ -36,11 +36,12 @@
 #include "util/u_string.h"
 
 
-#define GALLIVM_DEBUG_TGSI      0x1
-#define GALLIVM_DEBUG_IR        0x2
-#define GALLIVM_DEBUG_ASM       0x4
-#define GALLIVM_DEBUG_NO_OPT    0x8
-#define GALLIVM_DEBUG_PERF      0x10
+#define GALLIVM_DEBUG_TGSI          (1 << 0)
+#define GALLIVM_DEBUG_IR            (1 << 1)
+#define GALLIVM_DEBUG_ASM           (1 << 2)
+#define GALLIVM_DEBUG_NO_OPT        (1 << 3)
+#define GALLIVM_DEBUG_PERF          (1 << 4)
+#define GALLIVM_DEBUG_NO_BRILINEAR  (1 << 5)
 
 
 #ifdef DEBUG
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_init.c b/src/gallium/auxiliary/gallivm/lp_bld_init.c
index 761f33b578..5598ca5c48 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_init.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_init.c
@@ -44,6 +44,7 @@ static const struct debug_named_value lp_bld_debug_flags[] = {
    { "asm",    GALLIVM_DEBUG_ASM, NULL },
    { "nopt",   GALLIVM_DEBUG_NO_OPT, NULL },
    { "perf",   GALLIVM_DEBUG_PERF, NULL },
+   { "no_brilinear", GALLIVM_DEBUG_NO_BRILINEAR, NULL },
    DEBUG_NAMED_VALUE_END
 };
 
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_sample.c b/src/gallium/auxiliary/gallivm/lp_bld_sample.c
index 1a27a24118..9d15a6f4da 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_sample.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_sample.c
@@ -47,8 +47,7 @@
 
 
 /*
- * Bri-linear factor. Use zero or any other number less than one to force
- * tri-linear filtering.
+ * Bri-linear factor. Should be greater than one.
  */
 #define BRILINEAR_FACTOR 2
 
@@ -464,7 +463,7 @@ lp_build_lod_selector(struct lp_build_sample_context *bld,
                return;
             }
             if (mip_filter == PIPE_TEX_MIPFILTER_LINEAR &&
-                BRILINEAR_FACTOR > 1.0) {
+                !(gallivm_debug & GALLIVM_DEBUG_NO_BRILINEAR)) {
                lp_build_brilinear_rho(float_bld, rho, BRILINEAR_FACTOR,
                                       out_lod_ipart, out_lod_fpart);
                return;
@@ -507,7 +506,7 @@ lp_build_lod_selector(struct lp_build_sample_context *bld,
    }
 
    if (mip_filter == PIPE_TEX_MIPFILTER_LINEAR) {
-      if (BRILINEAR_FACTOR > 1.0) {
+      if (!(gallivm_debug & GALLIVM_DEBUG_NO_BRILINEAR)) {
          lp_build_brilinear_lod(float_bld, lod, BRILINEAR_FACTOR,
                                 out_lod_ipart, out_lod_fpart);
       }