[PATCH 2/4] EXA/evergreen/ni: optimize non-overlapping Copy

[Grigori Goronzy]

In case dst and src rectangles of a Copy operation in the same surface
don't overlap, it is safe to skip the scratch surface. This is a
common case.
---
 src/evergreen_exa.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/evergreen_exa.c b/src/evergreen_exa.c
index 86f455d..2cdce0f 100644
--- a/src/evergreen_exa.c
+++ b/src/evergreen_exa.c
@@ -575,7 +575,12 @@ EVERGREENCopy(PixmapPtr pDst,
     if (accel_state->vsync)
 	RADEONVlineHelperSet(pScrn, dstX, dstY, dstX + w, dstY + h);
 
-    if (accel_state->same_surface && accel_state->copy_area) {
+    if (accel_state->same_surface &&
+	    (srcX + w <= dstX || dstX + w <= srcX || srcY + h <= dstY || dstY + h <= srcY)) {
+	EVERGREENDoPrepareCopy(pScrn);
+	EVERGREENAppendCopyVertex(pScrn, srcX, srcY, dstX, dstY, w, h);
+	EVERGREENDoCopyVline(pDst);
+    } else if (accel_state->same_surface && accel_state->copy_area) {
 	uint32_t orig_dst_domain = accel_state->dst_obj.domain;
 	uint32_t orig_src_domain = accel_state->src_obj[0].domain;
 	uint32_t orig_src_tiling_flags = accel_state->src_obj[0].tiling_flags;
-- 
1.8.1.2