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-rw-r--r--src/loader/loader_dri3_helper.c18
-rw-r--r--src/loader/loader_dri3_helper.h3
2 files changed, 21 insertions, 0 deletions
diff --git a/src/loader/loader_dri3_helper.c b/src/loader/loader_dri3_helper.c
index 1c93e7a96d3..c2ae8958120 100644
--- a/src/loader/loader_dri3_helper.c
+++ b/src/loader/loader_dri3_helper.c
@@ -504,6 +504,7 @@ loader_dri3_copy_sub_buffer(struct loader_dri3_drawable *draw,
x, y, width, height, __BLIT_FLAG_FLUSH);
}
+ loader_dri3_swapbuffer_barrier(draw);
dri3_fence_reset(draw->conn, back);
dri3_copy_area(draw->conn,
dri3_back_buffer(draw)->pixmap,
@@ -595,6 +596,7 @@ loader_dri3_wait_gl(struct loader_dri3_drawable *draw)
front->height,
0, 0, front->width,
front->height, __BLIT_FLAG_FLUSH);
+ loader_dri3_swapbuffer_barrier(draw);
loader_dri3_copy_drawable(draw, draw->drawable, front->pixmap);
}
@@ -1258,6 +1260,7 @@ dri3_get_buffer(__DRIdrawable *driDrawable,
}
break;
case loader_dri3_buffer_front:
+ loader_dri3_swapbuffer_barrier(draw);
dri3_fence_reset(draw->conn, new_buffer);
dri3_copy_area(draw->conn,
draw->drawable,
@@ -1431,3 +1434,18 @@ loader_dri3_update_drawable_geometry(struct loader_dri3_drawable *draw)
free(geom_reply);
}
}
+
+
+/**
+ * Make sure the server has flushed all pending swap buffers to hardware
+ * for this drawable. Ideally we'd want to send an X protocol request to
+ * have the server block our connection until the swaps are complete. That
+ * would avoid the potential round-trip here.
+ */
+void
+loader_dri3_swapbuffer_barrier(struct loader_dri3_drawable *draw)
+{
+ int64_t ust, msc, sbc;
+
+ (void) loader_dri3_wait_for_sbc(draw, 0, &ust, &msc, &sbc);
+}
diff --git a/src/loader/loader_dri3_helper.h b/src/loader/loader_dri3_helper.h
index a865e463559..659b63afa7a 100644
--- a/src/loader/loader_dri3_helper.h
+++ b/src/loader/loader_dri3_helper.h
@@ -241,4 +241,7 @@ loader_dri3_get_buffers(__DRIdrawable *driDrawable,
void
loader_dri3_update_drawable_geometry(struct loader_dri3_drawable *draw);
+
+void
+loader_dri3_swapbuffer_barrier(struct loader_dri3_drawable *draw);
#endif