gallium: add void *user_buffer to pipe_constant_buffer

This reduces CPU overhead when updating constants.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/gallium/drivers/i915/i915_state.c b/src/gallium/drivers/i915/i915_state.c
index 772e229ceff..bd9e8bac0ae 100644
--- a/src/gallium/drivers/i915/i915_state.c
+++ b/src/gallium/drivers/i915/i915_state.c
@@ -672,6 +672,11 @@ static void i915_set_constant_buffer(struct pipe_context *pipe,
    unsigned new_num = 0;
    boolean diff = TRUE;
 
+   if (cb && cb->user_buffer) {
+      buf = i915_user_buffer_create(pipe->screen, cb->user_buffer,
+                                    cb->buffer_size,
+                                    PIPE_BIND_CONSTANT_BUFFER);
+   }
 
    /* XXX don't support geom shaders now */
    if (shader == PIPE_SHADER_GEOMETRY)
@@ -707,6 +712,10 @@ static void i915_set_constant_buffer(struct pipe_context *pipe,
 
    if (diff)
       i915->dirty |= shader == PIPE_SHADER_VERTEX ? I915_NEW_VS_CONSTANTS : I915_NEW_FS_CONSTANTS;
+
+   if (cb && cb->user_buffer) {
+      pipe_resource_reference(&buf, NULL);
+   }
 }