gallium: Implement draw_vbo and set_index_buffer for all drivers.

Some drivers define a generic function that is called by all drawing
functions.  To implement draw_vbo for such drivers, either draw_vbo
calls the generic function or the prototype of the generic function is
changed to match draw_vbo.

Other drivers have no such generic function.  draw_vbo is implemented by
calling either draw_arrays and draw_elements.

For most drivers, set_index_buffer does not mark the state dirty for
tracking.  Instead, the index buffer state is emitted whenever draw_vbo
is called, just like the case with draw_elements.  It surely can be
improved.

1 files changed, 14 insertions, 0 deletions

diff --git a/src/gallium/drivers/llvmpipe/lp_state_vertex.c b/src/gallium/drivers/llvmpipe/lp_state_vertex.c
index 113f13db01..d86e66b4fb 100644
--- a/src/gallium/drivers/llvmpipe/lp_state_vertex.c
+++ b/src/gallium/drivers/llvmpipe/lp_state_vertex.c
@@ -89,6 +89,19 @@ llvmpipe_set_vertex_buffers(struct pipe_context *pipe,
 }
 
 
+static void
+llvmpipe_set_index_buffer(struct pipe_context *pipe,
+                          const struct pipe_index_buffer *ib)
+{
+   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
+
+   if (ib)
+      memcpy(&llvmpipe->index_buffer, ib, sizeof(llvmpipe->index_buffer));
+   else
+      memset(&llvmpipe->index_buffer, 0, sizeof(llvmpipe->index_buffer));
+
+   /* TODO make this more like a state */
+}
 
 void
 llvmpipe_init_vertex_funcs(struct llvmpipe_context *llvmpipe)
@@ -98,4 +111,5 @@ llvmpipe_init_vertex_funcs(struct llvmpipe_context *llvmpipe)
    llvmpipe->pipe.delete_vertex_elements_state = llvmpipe_delete_vertex_elements_state;
 
    llvmpipe->pipe.set_vertex_buffers = llvmpipe_set_vertex_buffers;
+   llvmpipe->pipe.set_index_buffer = llvmpipe_set_index_buffer;
 }