gallium: add QUERY_TIMESTAMP cap and get_timestamp screen function

2 files changed, 9 insertions, 1 deletions

diff --git a/src/gallium/include/pipe/p_defines.h b/src/gallium/include/pipe/p_defines.h
index 479b26e1517..8d787ec79e2 100644
--- a/src/gallium/include/pipe/p_defines.h
+++ b/src/gallium/include/pipe/p_defines.h
@@ -485,7 +485,8 @@ enum pipe_cap {
    PIPE_CAP_USER_INDEX_BUFFERS = 69,
    PIPE_CAP_USER_CONSTANT_BUFFERS = 70,
    PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT = 71,
-   PIPE_CAP_START_INSTANCE = 72
+   PIPE_CAP_START_INSTANCE = 72,
+   PIPE_CAP_QUERY_TIMESTAMP = 73
 };
 
 /**
diff --git a/src/gallium/include/pipe/p_screen.h b/src/gallium/include/pipe/p_screen.h
index 164e54d3205..fdf6fa2d3f9 100644
--- a/src/gallium/include/pipe/p_screen.h
+++ b/src/gallium/include/pipe/p_screen.h
@@ -108,6 +108,13 @@ struct pipe_screen {
 			    enum pipe_compute_cap param,
 			    void *ret);
 
+   /**
+    * Query a timestamp in nanoseconds. The returned value should match
+    * PIPE_QUERY_TIMESTAMP. This function returns immediately and doesn't
+    * wait for rendering to complete (which cannot be achieved with queries).
+    */
+   uint64_t (*get_timestamp)(struct pipe_screen *);
+
    struct pipe_context * (*context_create)( struct pipe_screen *,
 					    void *priv );