vbo: create a new draw function interface for indirect draws

All indirect draws are passed to the new draw function. By default
there's a fallback implementation which pipes it right back to
draw_prims, but eventually both the fallback and draw_prim's support for
indirect drawing should be removed.

This should allow a backend to properly support ARB_multi_draw_indirect
and ARB_indirect_parameters.

Signed-off-by: Ilia Mirkin <[email protected]>
Acked-by: Marek Olšák <[email protected]>
Reviewed-by: Ian Romanick <[email protected]>

1 files changed, 15 insertions, 0 deletions

diff --git a/src/mesa/vbo/vbo.h b/src/mesa/vbo/vbo.h
index dd9b428b104..0b8b6a9de56 100644
--- a/src/mesa/vbo/vbo.h
+++ b/src/mesa/vbo/vbo.h
@@ -110,6 +110,18 @@ typedef void (*vbo_draw_func)( struct gl_context *ctx,
 			       struct gl_buffer_object *indirect);
 
 
+typedef void (*vbo_indirect_draw_func)(
+   struct gl_context *ctx,
+   GLuint mode,
+   struct gl_buffer_object *indirect_data,
+   GLsizeiptr indirect_offset,
+   unsigned draw_count,
+   unsigned stride,
+   struct gl_buffer_object *indirect_params,
+   GLsizeiptr indirect_params_offset,
+   const struct _mesa_index_buffer *ib);
+
+
 
 
 /* Utility function to cope with various constraints on tnl modules or
@@ -179,6 +191,9 @@ void vbo_always_unmap_buffers(struct gl_context *ctx);
 
 void vbo_set_draw_func(struct gl_context *ctx, vbo_draw_func func);
 
+void vbo_set_indirect_draw_func(struct gl_context *ctx,
+                                vbo_indirect_draw_func func);
+
 void vbo_check_buffers_are_unmapped(struct gl_context *ctx);
 
 void vbo_bind_arrays(struct gl_context *ctx);