[Mesa-dev] [PATCH 2/4] st/mesa: add ST_DEBUG=wf option which enables wireframe rendering

[Marek Olšák]

From: Marek Olšák <marek.olsak at amd.com>

Useful for tessellation.
---
 src/mesa/state_tracker/st_atom_rasterizer.c | 11 +++++++++--
 src/mesa/state_tracker/st_debug.c           |  1 +
 src/mesa/state_tracker/st_debug.h           |  1 +
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/mesa/state_tracker/st_atom_rasterizer.c b/src/mesa/state_tracker/st_atom_rasterizer.c
index a228538..dfa728b 100644
--- a/src/mesa/state_tracker/st_atom_rasterizer.c
+++ b/src/mesa/state_tracker/st_atom_rasterizer.c
@@ -33,6 +33,7 @@
 #include "main/macros.h"
 #include "st_context.h"
 #include "st_atom.h"
+#include "st_debug.h"
 #include "st_program.h"
 #include "pipe/p_context.h"
 #include "pipe/p_defines.h"
@@ -119,8 +120,14 @@ static void update_raster_state( struct st_context *st )
    /* _NEW_POLYGON
     */
    {
-      raster->fill_front = translate_fill( ctx->Polygon.FrontMode );
-      raster->fill_back = translate_fill( ctx->Polygon.BackMode );
+      if (ST_DEBUG & DEBUG_WIREFRAME) {
+         raster->fill_front = PIPE_POLYGON_MODE_LINE;
+         raster->fill_back = PIPE_POLYGON_MODE_LINE;
+      }
+      else {
+         raster->fill_front = translate_fill( ctx->Polygon.FrontMode );
+         raster->fill_back = translate_fill( ctx->Polygon.BackMode );
+      }
 
       /* Simplify when culling is active:
        */
diff --git a/src/mesa/state_tracker/st_debug.c b/src/mesa/state_tracker/st_debug.c
index 8c15e18..de3e3a9 100644
--- a/src/mesa/state_tracker/st_debug.c
+++ b/src/mesa/state_tracker/st_debug.c
@@ -55,6 +55,7 @@ static const struct debug_named_value st_debug_flags[] = {
    { "query",    DEBUG_QUERY, NULL },
    { "draw",     DEBUG_DRAW, NULL },
    { "buffer",   DEBUG_BUFFER, NULL },
+   { "wf",       DEBUG_WIREFRAME, NULL },
    DEBUG_NAMED_VALUE_END
 };
 
diff --git a/src/mesa/state_tracker/st_debug.h b/src/mesa/state_tracker/st_debug.h
index c1c4825..49b916f 100644
--- a/src/mesa/state_tracker/st_debug.h
+++ b/src/mesa/state_tracker/st_debug.h
@@ -46,6 +46,7 @@ st_print_current(void);
 #define DEBUG_SCREEN    0x80
 #define DEBUG_DRAW      0x100
 #define DEBUG_BUFFER    0x200
+#define DEBUG_WIREFRAME 0x400
 
 #ifdef DEBUG
 extern int ST_DEBUG;
-- 
1.9.1