llvmpipe: support pipe_resource-based constant buffers

Before this we only supported user-based constant buffers.

First, we basically plumb pipe_constant_buffer objects through llvmpipe
rather than pipe_resource objects.

Second, update llvmpipe_set_constant_buffer() and try_update_scene_state()
so they understand both resource- and user-based constant buffers.

The problem with user constant buffers is the potential for use-after-free,
as seen in some WebGL tests.  The next patch will flip the switch for
resource-based const buffers.

Reviewed-by: Jose Fonseca <jfonseca@vmware.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/gallium/drivers/llvmpipe/lp_setup_context.h b/src/gallium/drivers/llvmpipe/lp_setup_context.h
index 60809db..4d20dd3 100644
--- a/src/gallium/drivers/llvmpipe/lp_setup_context.h
+++ b/src/gallium/drivers/llvmpipe/lp_setup_context.h
@@ -128,7 +128,7 @@ struct lp_setup_context
 
    /** fragment shader constants */
    struct {
-      struct pipe_resource *current;
+      struct pipe_constant_buffer current;
       unsigned stored_size;
       const void *stored_data;
    } constants[LP_MAX_TGSI_CONST_BUFFERS];