Hook in split functionality

2 files changed, 37 insertions, 7 deletions

diff --git a/src/mesa/vbo/vbo.h b/src/mesa/vbo/vbo.h
index 80f7a3322b..c81d83f9b6 100644
--- a/src/mesa/vbo/vbo.h
+++ b/src/mesa/vbo/vbo.h
@@ -65,4 +65,40 @@ void _vbo_DestroyContext( GLcontext *ctx );
 void _vbo_InvalidateState( GLcontext *ctx, GLuint new_state );
 
 
+typedef void (*vbo_draw_func)( GLcontext *ctx,
+			       const struct gl_client_array **arrays,
+			       const struct _mesa_prim *prims,
+			       GLuint nr_prims,
+			       const struct _mesa_index_buffer *ib,
+			       GLuint min_index,
+			       GLuint max_index );
+
+
+
+
+/* Utility function to cope with various constraints on tnl modules or
+ * hardware.  This can be used to split an incoming set of arrays and
+ * primitives against the following constraints:
+ *    - Maximum number of indices in index buffer.
+ *    - Maximum number of vertices referenced by index buffer.
+ *    - Maximum hardware vertex buffer size.
+ */
+struct split_limits {
+   GLuint max_verts;
+   GLuint max_indices;
+   GLuint max_vb_size;		/* bytes */
+};
+
+
+void vbo_split_prims( GLcontext *ctx,
+		      const struct gl_client_array *arrays[],
+		      const struct _mesa_prim *prim,
+		      GLuint nr_prims,
+		      const struct _mesa_index_buffer *ib,
+		      GLuint min_index,
+		      GLuint max_index,
+		      vbo_draw_func draw,
+		      const struct split_limits *limits );
+
+
 #endif
diff --git a/src/mesa/vbo/vbo_context.h b/src/mesa/vbo/vbo_context.h
index 4c5ed96765..0dc1019b39 100644
--- a/src/mesa/vbo/vbo_context.h
+++ b/src/mesa/vbo/vbo_context.h
@@ -79,13 +79,7 @@ struct vbo_context {
    /* Callback into the driver.  This must always succeed, the driver
     * is responsible for initiating any fallback actions required:
     */
-   void (*draw_prims)( GLcontext *ctx,
-		       const struct gl_client_array *arrays[],
-		       const struct _mesa_prim *prims,
-		       GLuint nr_prims,
-		       const struct _mesa_index_buffer *ib,
-		       GLuint min_index,
-		       GLuint max_index );
+   vbo_draw_func draw_prims;
 };