Mesa (master): gallium: add pipe_transfer_usage for z/s only mappings

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Module: Mesa
Branch: master
Commit: 2368813ce6f6e767226ae4698159106f467ce428
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=2368813ce6f6e767226ae4698159106f467ce428

Author: Mike Blumenkrantz <michael.blumenkrantz at gmail.com>
Date:   Mon Aug 10 17:32:05 2020 -0400

gallium: add pipe_transfer_usage for z/s only mappings

Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5338>

---

 src/gallium/include/pipe/p_defines.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/gallium/include/pipe/p_defines.h b/src/gallium/include/pipe/p_defines.h
index d82ffcd14dc..88e65ca787e 100644
--- a/src/gallium/include/pipe/p_defines.h
+++ b/src/gallium/include/pipe/p_defines.h
@@ -352,6 +352,16 @@ enum pipe_transfer_usage
     */
    PIPE_TRANSFER_THREAD_SAFE = 1 << 15,
 
+   /**
+    * Map only the depth aspect of a resource
+    */
+   PIPE_TRANSFER_DEPTH_ONLY = 1 << 16,
+
+   /**
+    * Map only the stencil aspect of a resource
+    */
+   PIPE_TRANSFER_STENCIL_ONLY = 1 << 17,
+
    /**
     * This and higher bits are reserved for private use by drivers. Drivers
     * should use this as (PIPE_TRANSFER_DRV_PRV << i).