[Mesa-dev] [PATCH 1/2] i965: Split brw_set_prim into brw/gen6 variants

[Chad Versace]

The "slight optimization to avoid the GS program" in brw_set_prim() is not
used by Gen 6, since Gen 6 doesn't use a GS program. Also, Gen 6 doesn't use
reduced primitives.

Also, document that intel_context.reduced_primitive is only used for Gen < 6

Signed-off-by: Chad Versace <chad at chad-versace.us>
---
 src/mesa/drivers/dri/i965/brw_draw.c       |   19 ++++++++++++++++++-
 src/mesa/drivers/dri/intel/intel_context.h |    2 +-
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_draw.c b/src/mesa/drivers/dri/i965/brw_draw.c
index bdb5b67..39d38a5 100644
--- a/src/mesa/drivers/dri/i965/brw_draw.c
+++ b/src/mesa/drivers/dri/i965/brw_draw.c
@@ -115,6 +115,19 @@ static GLuint brw_set_prim(struct brw_context *brw,
    return prim_to_hw_prim[mode];
 }
 
+static GLuint gen6_set_prim(struct brw_context *brw,
+                            const struct _mesa_prim *prim)
+{
+   DBG("PRIM: %s\n", _mesa_lookup_enum_by_nr(prim->mode));
+
+   if (prim->mode != brw->primitive) {
+      brw->primitive = prim->mode;
+      brw->state.dirty.brw |= BRW_NEW_PRIMITIVE;
+   }
+
+   return prim_to_hw_prim[mode];
+}
+
 
 static GLuint trim(GLenum prim, GLuint length)
 {
@@ -335,7 +348,11 @@ static GLboolean brw_try_draw_prims( struct gl_context *ctx,
        */
       intel_batchbuffer_require_space(intel, estimated_max_prim_size, false);
 
-      hw_prim = brw_set_prim(brw, &prim[i]);
+      if (intel->gen < 6)
+	 hw_prim = brw_set_prim(brw, &prim[i]);
+      else
+	 hw_prim = gen6_set_prim(brw, &prim[i]);
+
       if (brw->state.dirty.brw) {
 	 brw_validate_state(brw);
 
diff --git a/src/mesa/drivers/dri/intel/intel_context.h b/src/mesa/drivers/dri/intel/intel_context.h
index eb78c00..cf7ab9e 100644
--- a/src/mesa/drivers/dri/intel/intel_context.h
+++ b/src/mesa/drivers/dri/intel/intel_context.h
@@ -253,7 +253,7 @@ struct intel_context
    GLuint RenderIndex;
    GLmatrix ViewportMatrix;
    GLenum render_primitive;
-   GLenum reduced_primitive;
+   GLenum reduced_primitive; /*< Only gen < 6 */
    GLuint vertex_size;
    GLubyte *verts;              /* points to tnl->clipspace.vertex_buf */
 
-- 
1.7.6.2