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/softpipe/sp_state_vertex.c b/src/gallium/drivers/softpipe/sp_state_vertex.c
index 462f4d2655..880a7c7cd2 100644
--- a/src/gallium/drivers/softpipe/sp_state_vertex.c
+++ b/src/gallium/drivers/softpipe/sp_state_vertex.c
@@ -88,3 +88,17 @@ softpipe_set_vertex_buffers(struct pipe_context *pipe,
 
    draw_set_vertex_buffers(softpipe->draw, count, buffers);
 }
+
+void
+softpipe_set_index_buffer(struct pipe_context *pipe,
+                          const struct pipe_index_buffer *ib)
+{
+   struct softpipe_context *softpipe = softpipe_context(pipe);
+
+   if (ib)
+      memcpy(&softpipe->index_buffer, ib, sizeof(softpipe->index_buffer));
+   else
+      memset(&softpipe->index_buffer, 0, sizeof(softpipe->index_buffer));
+
+   /* TODO make this more like a state */
+}