[Mesa-dev] [PATCH 1/2] i965: Add a new debug mode for the VUE map

[Chris Forbes]

INTEL_DEBUG=vue now emits a listing of each slot in the VUE map,
and the corresponding interpolation mode.

Signed-off-by: Chris Forbes <chrisf at ijw.co.nz>
---
 src/mesa/drivers/dri/i965/brw_interpolation_map.c | 28 +++++++++++++++++++++++
 src/mesa/drivers/dri/i965/intel_context.c         |  1 +
 src/mesa/drivers/dri/i965/intel_context.h         |  1 +
 3 files changed, 30 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/brw_interpolation_map.c b/src/mesa/drivers/dri/i965/brw_interpolation_map.c
index 7b7dbef..a7df8e6 100644
--- a/src/mesa/drivers/dri/i965/brw_interpolation_map.c
+++ b/src/mesa/drivers/dri/i965/brw_interpolation_map.c
@@ -23,6 +23,18 @@
 
 #include "brw_state.h"
 
+static char const *get_qual_name(int mode)
+{
+   switch (mode) {
+      case INTERP_QUALIFIER_NONE: return "none";
+      case INTERP_QUALIFIER_FLAT: return "flat";
+      case INTERP_QUALIFIER_SMOOTH: return "smooth";
+      case INTERP_QUALIFIER_NOPERSPECTIVE: return "nopersp";
+      default:
+                                           return "???";
+   }
+}
+
 
 /* Set up interpolation modes for every element in the VUE */
 static void
@@ -72,6 +84,22 @@ brw_setup_vue_interpolation(struct brw_context *brw)
 
       brw->interpolation_mode.mode[i] = mode;
    }
+
+   if (unlikely(INTEL_DEBUG & DEBUG_VUE)) {
+      printf("VUE map:\n");
+      for (int i=0; i < vue_map->num_slots; i++) {
+         int varying = vue_map->slot_to_varying[i];
+         if (varying == -1) {
+            printf("%d: --\n", i);
+            continue;
+         }
+
+         printf("%d: %d %s ofs %d\n",
+               i, varying,
+               get_qual_name(brw->interpolation_mode.mode[i]),
+               brw_vue_slot_to_offset(i));
+      }
+   }
 }
 
 
diff --git a/src/mesa/drivers/dri/i965/intel_context.c b/src/mesa/drivers/dri/i965/intel_context.c
index 7860e1f..cf2d02e 100644
--- a/src/mesa/drivers/dri/i965/intel_context.c
+++ b/src/mesa/drivers/dri/i965/intel_context.c
@@ -332,6 +332,7 @@ static const struct dri_debug_control debug_control[] = {
    { "shader_time", DEBUG_SHADER_TIME },
    { "no16",  DEBUG_NO16 },
    { "blorp", DEBUG_BLORP },
+   { "vue",   DEBUG_VUE },
    { NULL,    0 }
 };
 
diff --git a/src/mesa/drivers/dri/i965/intel_context.h b/src/mesa/drivers/dri/i965/intel_context.h
index 188ac89..734c57c 100644
--- a/src/mesa/drivers/dri/i965/intel_context.h
+++ b/src/mesa/drivers/dri/i965/intel_context.h
@@ -190,6 +190,7 @@ extern int INTEL_DEBUG;
 #define DEBUG_SHADER_TIME 0x8000000
 #define DEBUG_BLORP     0x10000000
 #define DEBUG_NO16      0x20000000
+#define DEBUG_VUE       0x40000000
 
 #ifdef HAVE_ANDROID_PLATFORM
 #define LOG_TAG "INTEL-MESA"
-- 
1.8.3.4