gallium: add void *user_buffer to pipe_constant_buffer

This reduces CPU overhead when updating constants.

1 files changed, 10 insertions, 0 deletions

diff --git a/src/gallium/drivers/nv30/nv30_state.c b/src/gallium/drivers/nv30/nv30_state.c
index 3b4cc998877..f65c8b71fdd 100644
--- a/src/gallium/drivers/nv30/nv30_state.c
+++ b/src/gallium/drivers/nv30/nv30_state.c
@@ -323,6 +323,12 @@ nv30_set_constant_buffer(struct pipe_context *pipe, uint shader, uint index,
    struct pipe_resource *buf = cb ? cb->buffer : NULL;
    unsigned size;
 
+   if (cb && cb->user_buffer) {
+      buf = nouveau_user_buffer_create(pipe->screen, cb->user_buffer,
+                                       cb->buffer_size,
+                                       PIPE_BIND_CONSTANT_BUFFER);
+   }
+
    size = 0;
    if (buf)
       size = buf->width0 / (4 * sizeof(float));
@@ -337,6 +343,10 @@ nv30_set_constant_buffer(struct pipe_context *pipe, uint shader, uint index,
       nv30->fragprog.constbuf_nr = size;
       nv30->dirty |= NV30_NEW_FRAGCONST;
    }
+
+   if (cb && cb->user_buffer) {
+      pipe_resource_reference(&buf, NULL);
+   }
 }
 
 static void