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, 15 insertions, 0 deletions

diff --git a/src/gallium/drivers/nvfx/nvfx_state.c b/src/gallium/drivers/nvfx/nvfx_state.c
index 30322d46d9..cd58e439d7 100644
--- a/src/gallium/drivers/nvfx/nvfx_state.c
+++ b/src/gallium/drivers/nvfx/nvfx_state.c
@@ -555,6 +555,20 @@ nvfx_set_vertex_buffers(struct pipe_context *pipe, unsigned count,
 	nvfx->draw_dirty |= NVFX_NEW_ARRAYS;
 }
 
+static void
+nvfx_set_index_buffer(struct pipe_context *pipe,
+		      const struct pipe_index_buffer *ib)
+{
+	struct nvfx_context *nvfx = nvfx_context(pipe);
+
+	if (ib)
+		memcpy(&nvfx->idxbuf, ib, sizeof(nvfx->idxbuf));
+	else
+		memset(&nvfx->idxbuf, 0, sizeof(nvfx->idxbuf));
+
+	/* TODO make this more like a state */
+}
+
 static void *
 nvfx_vtxelts_state_create(struct pipe_context *pipe,
 			  unsigned num_elements,
@@ -635,4 +649,5 @@ nvfx_init_state_functions(struct nvfx_context *nvfx)
 	nvfx->pipe.bind_vertex_elements_state = nvfx_vtxelts_state_bind;
 
 	nvfx->pipe.set_vertex_buffers = nvfx_set_vertex_buffers;
+	nvfx->pipe.set_index_buffer = nvfx_set_index_buffer;
 }