gallium: extend pipe_context::flush for it to accept an END_OF_FRAME flag

Usage with pipe_context:
  pipe->flush(pipe, NULL, PIPE_FLUSH_END_OF_FRAME);

Usage with st_context_iface:
  st->flush(st, ST_FLUSH_END_OF_FRAME, NULL);

The flag is only a hint for drivers. Radeon will use it for buffer eviction
heuristics in the kernel (e.g. for queries like how many frames have passed
since a buffer was used).

The flag is currently only generated by st/dri on SwapBuffers.

Reviewed-by: Brian Paul <[email protected]>
Reviewed-by: Stéphane Marchesin <[email protected]>

1 files changed, 4 insertions, 2 deletions

diff --git a/src/gallium/include/pipe/p_context.h b/src/gallium/include/pipe/p_context.h
index c5dcae56501..7ed946e2ca9 100644
--- a/src/gallium/include/pipe/p_context.h
+++ b/src/gallium/include/pipe/p_context.h
@@ -31,6 +31,7 @@
 #include "p_compiler.h"
 #include "p_format.h"
 #include "p_video_enums.h"
+#include "p_defines.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -349,8 +350,9 @@ struct pipe_context {
 
    /** Flush draw commands
     */
-   void (*flush)( struct pipe_context *pipe,
-                  struct pipe_fence_handle **fence );
+   void (*flush)(struct pipe_context *pipe,
+                 struct pipe_fence_handle **fence,
+                 enum pipe_flush_flags flags);
 
    /**
     * Create a view on a texture to be used by a shader stage.