mesa: Make MultiDrawElements submit multiple primitives at once.

Previously, MultiDrawElements just called DrawElements a bunch of times.
By sending several primitives down the pipeline at once, we avoid a bunch
of validation.  On my GL demo, this improves fps by 2.5% (+/- .41%) and
reduces CPU usage by 70.5% (+/- 2.9%) (n=3).

Reviewed by: Ian Romanick <ian.d.romanick@intel.com>

8 files changed, 38 insertions, 33 deletions

diff --git a/src/mesa/main/api_exec.c b/src/mesa/main/api_exec.c
index 199550b35d..cbf48615bf 100644
--- a/src/mesa/main/api_exec.c
+++ b/src/mesa/main/api_exec.c
@@ -529,7 +529,6 @@ _mesa_init_exec_table(struct _glapi_table *exec)
    /* 148. GL_EXT_multi_draw_arrays */
 #if _HAVE_FULL_GL
    SET_MultiDrawArraysEXT(exec, _mesa_MultiDrawArraysEXT);
-   SET_MultiDrawElementsEXT(exec, _mesa_MultiDrawElementsEXT);
 #endif
 
    /* 173. GL_INGR_blend_func_separate */
diff --git a/src/mesa/main/api_noop.c b/src/mesa/main/api_noop.c
index 66f9c4e6bd..09ba7e5062 100644
--- a/src/mesa/main/api_noop.c
+++ b/src/mesa/main/api_noop.c
@@ -772,6 +772,20 @@ _mesa_noop_DrawRangeElements(GLenum mode,
        CALL_DrawElements(GET_DISPATCH(), (mode, count, type, indices));
 }
 
+/* GL_EXT_multi_draw_arrays */
+void GLAPIENTRY
+_mesa_noop_MultiDrawElements(GLenum mode, const GLsizei *count, GLenum type,
+			     const GLvoid **indices, GLsizei primcount)
+{
+   GLsizei i;
+
+   for (i = 0; i < primcount; i++) {
+      if (count[i] > 0) {
+	 CALL_DrawElements(GET_DISPATCH(), (mode, count[i], type, indices[i]));
+      }
+   }
+}
+
 /*
  * Eval Mesh
  */
@@ -980,6 +994,7 @@ _mesa_noop_vtxfmt_init( GLvertexformat *vfmt )
    vfmt->DrawArrays = _mesa_noop_DrawArrays;
    vfmt->DrawElements = _mesa_noop_DrawElements;
    vfmt->DrawRangeElements = _mesa_noop_DrawRangeElements;
+   vfmt->MultiDrawElementsEXT = _mesa_noop_MultiDrawElements;
    vfmt->EvalMesh1 = _mesa_noop_EvalMesh1;
    vfmt->EvalMesh2 = _mesa_noop_EvalMesh2;
 }
diff --git a/src/mesa/main/api_noop.h b/src/mesa/main/api_noop.h
index 8bf4660800..a7956d00b3 100644
--- a/src/mesa/main/api_noop.h
+++ b/src/mesa/main/api_noop.h
@@ -40,6 +40,10 @@ _mesa_noop_EvalMesh2(GLenum mode, GLint i1, GLint i2, GLint j1, GLint j2);
 extern void GLAPIENTRY
 _mesa_noop_Materialfv(GLenum face, GLenum pname, const GLfloat *param);
 
+extern void GLAPIENTRY
+_mesa_noop_MultiDrawElements(GLenum mode, const GLsizei *count, GLenum type,
+			     const GLvoid **indices, GLsizei primcount);
+
 extern void
 _mesa_noop_vtxfmt_init(GLvertexformat *vfmt);
 
diff --git a/src/mesa/main/dd.h b/src/mesa/main/dd.h
index 1d92e510a4..f02e868d4a 100644
--- a/src/mesa/main/dd.h
+++ b/src/mesa/main/dd.h
@@ -1150,7 +1150,11 @@ typedef struct {
    void (GLAPIENTRYP DrawRangeElements)( GLenum mode, GLuint start,
 			      GLuint end, GLsizei count,
 			      GLenum type, const GLvoid *indices );
-   /*@}*/
+   void (GLAPIENTRYP MultiDrawElementsEXT)( GLenum mode, const GLsizei *count,
+					    GLenum type,
+					    const GLvoid **indices,
+					    GLsizei primcount);
+  /*@}*/
 
    /**
     * \name Eval
diff --git a/src/mesa/main/dlist.c b/src/mesa/main/dlist.c
index 9b68b3e116..8cff9ea64a 100644
--- a/src/mesa/main/dlist.c
+++ b/src/mesa/main/dlist.c
@@ -7751,18 +7751,6 @@ exec_MultiDrawArraysEXT(GLenum mode, GLint * first,
    CALL_MultiDrawArraysEXT(ctx->Exec, (mode, first, count, primcount));
 }
 
-/* GL_EXT_multi_draw_arrays */
-static void GLAPIENTRY
-exec_MultiDrawElementsEXT(GLenum mode, const GLsizei * count,
-                          GLenum type, const GLvoid ** indices,
-                          GLsizei primcount)
-{
-   GET_CURRENT_CONTEXT(ctx);
-   FLUSH_VERTICES(ctx, 0);
-   CALL_MultiDrawElementsEXT(ctx->Exec,
-                             (mode, count, type, indices, primcount));
-}
-
 /* GL_IBM_multimode_draw_arrays */
 static void GLAPIENTRY
 exec_MultiModeDrawArraysIBM(const GLenum * mode, const GLint * first,
@@ -8108,7 +8096,6 @@ _mesa_init_dlist_table(struct _glapi_table *table)
 
    /* 148. GL_EXT_multi_draw_arrays */
    SET_MultiDrawArraysEXT(table, exec_MultiDrawArraysEXT);
-   SET_MultiDrawElementsEXT(table, exec_MultiDrawElementsEXT);
 
    /* 149. GL_EXT_fog_coord */
    SET_FogCoordPointerEXT(table, exec_FogCoordPointerEXT);
@@ -8723,6 +8710,7 @@ _mesa_save_vtxfmt_init(GLvertexformat * vfmt)
    vfmt->DrawArrays = 0;
    vfmt->DrawElements = 0;
    vfmt->DrawRangeElements = 0;
+   vfmt->MultiDrawElemementsEXT = 0;
 #endif
 }
 
diff --git a/src/mesa/main/varray.c b/src/mesa/main/varray.c
index be1c03cec2..6cd2a2f4f6 100644
--- a/src/mesa/main/varray.c
+++ b/src/mesa/main/varray.c
@@ -1038,24 +1038,6 @@ _mesa_MultiDrawArraysEXT( GLenum mode, GLint *first,
 }
 
 
-/* GL_EXT_multi_draw_arrays */
-void GLAPIENTRY
-_mesa_MultiDrawElementsEXT( GLenum mode, const GLsizei *count, GLenum type,
-                            const GLvoid **indices, GLsizei primcount )
-{
-   GET_CURRENT_CONTEXT(ctx);
-   GLint i;
-
-   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
-
-   for (i = 0; i < primcount; i++) {
-      if (count[i] > 0) {
-         CALL_DrawElements(ctx->Exec, (mode, count[i], type, indices[i]));
-      }
-   }
-}
-
-
 /* GL_IBM_multimode_draw_arrays */
 void GLAPIENTRY
 _mesa_MultiModeDrawArraysIBM( const GLenum * mode, const GLint * first,
diff --git a/src/mesa/main/vtxfmt.c b/src/mesa/main/vtxfmt.c
index 1f807dc3dc..8d6f560a80 100644
--- a/src/mesa/main/vtxfmt.c
+++ b/src/mesa/main/vtxfmt.c
@@ -133,6 +133,7 @@ install_vtxfmt( struct _glapi_table *tab, const GLvertexformat *vfmt )
    SET_DrawArrays(tab, vfmt->DrawArrays);
    SET_DrawElements(tab, vfmt->DrawElements);
    SET_DrawRangeElements(tab, vfmt->DrawRangeElements);
+   SET_MultiDrawElementsEXT(tab, vfmt->MultiDrawElementsEXT);
    SET_EvalMesh1(tab, vfmt->EvalMesh1);
    SET_EvalMesh2(tab, vfmt->EvalMesh2);
    ASSERT(tab->EvalMesh2);
diff --git a/src/mesa/main/vtxfmt_tmp.h b/src/mesa/main/vtxfmt_tmp.h
index 6f5d01e40f..1308d0aa46 100644
--- a/src/mesa/main/vtxfmt_tmp.h
+++ b/src/mesa/main/vtxfmt_tmp.h
@@ -335,6 +335,17 @@ static void GLAPIENTRY TAG(DrawElements)( GLenum mode, GLsizei count, GLenum typ
    CALL_DrawElements(GET_DISPATCH(), ( mode, count, type, indices ));
 }
 
+static void GLAPIENTRY TAG(MultiDrawElementsEXT)( GLenum mode,
+						  const GLsizei *count,
+						  GLenum type,
+						  const GLvoid **indices,
+						  GLsizei primcount)
+{
+   PRE_LOOPBACK( MultiDrawElementsEXT );
+   CALL_MultiDrawElementsEXT(GET_DISPATCH(), ( mode, count, type, indices,
+					       primcount ));
+}
+
 static void GLAPIENTRY TAG(DrawRangeElements)( GLenum mode, GLuint start,
 				    GLuint end, GLsizei count,
 				    GLenum type, const GLvoid *indices )
@@ -522,6 +533,7 @@ static GLvertexformat TAG(vtxfmt) = {
    TAG(DrawArrays),
    TAG(DrawElements),
    TAG(DrawRangeElements),
+   TAG(MultiDrawElementsEXT),
    TAG(EvalMesh1),
    TAG(EvalMesh2)
 };