gallium: Plumb the swap INVALIDATE_ANCILLARY flag through more layers.

v2: Instead of telling the driver that the window system ancillaries have
    been invalidated (when the driver doesn't know which of its buffers
    are the window system's!), introduce a method for invalidating
    specific surfaces.

Reviewed-by: Jose Fonseca <[email protected]>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/gallium/include/pipe/p_context.h b/src/gallium/include/pipe/p_context.h
index af5674ff753..a4cae8eaf63 100644
--- a/src/gallium/include/pipe/p_context.h
+++ b/src/gallium/include/pipe/p_context.h
@@ -551,6 +551,17 @@ struct pipe_context {
     */
    void (*flush_resource)(struct pipe_context *ctx,
                           struct pipe_resource *resource);
+
+   /**
+    * Invalidate the contents of the resource.
+    *
+    * This is used to implement EGL's semantic of undefined depth/stencil
+    * contenst after a swapbuffers.  This allows a tiled renderer (for
+    * example) to not store the depth buffer.
+    */
+   void (*invalidate_resource)(struct pipe_context *ctx,
+                               struct pipe_resource *resource);
+
 };