[Mesa-dev] [PATCH] st/mesa: unmap the stream_uploader buffer before drawing

[Brian Paul]

Some drivers require that the vertex buffers be unmapped prior to
drawing.  This change unmaps the stream_uploader buffer after we've
uploaded the zero-stride attributes (unless the driver supports
rendering with mapped buffers).

This fixes a regression in the VMware driver since 17f776c27be266f2.
Some Mesa demos such as mandelbrot and brick would display black
quads instead of the expected rendering.

--

Marek: can you please verify that this is the right place for this
call (and not in st_draw_vbo())?
---
 src/mesa/state_tracker/st_atom_array.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/mesa/state_tracker/st_atom_array.c b/src/mesa/state_tracker/st_atom_array.c
index c7467eb..6af1355 100644
--- a/src/mesa/state_tracker/st_atom_array.c
+++ b/src/mesa/state_tracker/st_atom_array.c
@@ -670,6 +670,10 @@ setup_non_interleaved_attribs(struct st_context *st,
                             array->Size, array->Doubles, &attr);
    }
 
+   if (!ctx->Const.AllowMappedBuffersDuringExecution) {
+      u_upload_unmap(st->pipe->stream_uploader);
+   }
+
    set_vertex_attribs(st, vbuffer, num_vbuffers, velements, num_inputs);
 
    /* Unreference uploaded zero-stride vertex buffers. */
-- 
1.9.1