Mesa (main): zink: invalidate blit dsts if fully covered

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Module: Mesa
Branch: main
Commit: 79685199f43faac04544112751399d718cf588ec
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=79685199f43faac04544112751399d718cf588ec

Author: Mike Blumenkrantz <michael.blumenkrantz at gmail.com>
Date:   Fri Jun  3 13:59:11 2022 -0400

zink: invalidate blit dsts if fully covered

tiling perf++ since there's no need to load

Reviewed-by: Dave Airlie <airlied at redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16877>

---

 src/gallium/drivers/zink/zink_blit.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/gallium/drivers/zink/zink_blit.c b/src/gallium/drivers/zink/zink_blit.c
index 5df459f838c..49b298f391c 100644
--- a/src/gallium/drivers/zink/zink_blit.c
+++ b/src/gallium/drivers/zink/zink_blit.c
@@ -347,6 +347,9 @@ zink_blit(struct pipe_context *pctx,
    if (info->dst.resource->target == PIPE_BUFFER)
       util_range_add(info->dst.resource, &dst->valid_buffer_range,
                      info->dst.box.x, info->dst.box.x + info->dst.box.width);
+   /* this will draw a full-resource quad, so ignore existing data */
+   if (util_blit_covers_whole_resource(info))
+      pctx->invalidate_resource(pctx, info->dst.resource);
    zink_blit_begin(ctx, ZINK_BLIT_SAVE_FB | ZINK_BLIT_SAVE_FS | ZINK_BLIT_SAVE_TEXTURES);
 
    if (stencil_blit) {