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/i915/i915_state.c b/src/gallium/drivers/i915/i915_state.c
index e767aa9f8f..385c3b2d2d 100644
--- a/src/gallium/drivers/i915/i915_state.c
+++ b/src/gallium/drivers/i915/i915_state.c
@@ -812,6 +812,19 @@ i915_delete_vertex_elements_state(struct pipe_context *pipe, void *velems)
    FREE( velems );
 }
 
+static void i915_set_index_buffer(struct pipe_context *pipe,
+                                  const struct pipe_index_buffer *ib)
+{
+   struct i915_context *i915 = i915_context(pipe);
+
+   if (ib)
+      memcpy(&i915->index_buffer, ib, sizeof(i915->index_buffer));
+   else
+      memset(&i915->index_buffer, 0, sizeof(i915->index_buffer));
+
+   /* TODO make this more like a state */
+}
+
 static void
 i915_set_sample_mask(struct pipe_context *pipe,
                      unsigned sample_mask)
@@ -860,4 +873,5 @@ i915_init_state_functions( struct i915_context *i915 )
    i915->base.sampler_view_destroy = i915_sampler_view_destroy;
    i915->base.set_viewport_state = i915_set_viewport_state;
    i915->base.set_vertex_buffers = i915_set_vertex_buffers;
+   i915->base.set_index_buffer = i915_set_index_buffer;
 }