diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2011-12-20 18:39:20 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2011-12-20 18:46:47 +0000 |
| commit | dfafe76a57655784c313bc2078d0b28a7ac2675b (patch) | |
| tree | b278530a4aa9ccc04598bbaf4694e8e63832d2c6 | |
| parent | 0cda7b4fa82870d57fcd0036a3b734cc73e2bf28 (diff) | |
sna: Do not use Y-tiling for composite back pixmaps
These are treated by the core drawing routines as replacements for the
front-buffer attached to Windows, and so expect the usual BLT
accelerations are available, for example overlapping blits to handle
scrolling. If we create these pixmaps with Y-tiling and then they are
pinned by the external compositor we are forced to perform a double copy
through the 3D pipeline as it does not handle overlapping blits and the
BLT does not handle Y-tiling.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
| -rw-r--r-- | src/sna/sna_accel.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/sna/sna_accel.c b/src/sna/sna_accel.c index 60bd39fc..6c655cae 100644 --- a/src/sna/sna_accel.c +++ b/src/sna/sna_accel.c @@ -291,6 +291,13 @@ static inline uint32_t default_tiling(PixmapPtr pixmap) if (sna->kgem.gen == 21) return I915_TILING_X; + if (pixmap->usage_hint == CREATE_PIXMAP_USAGE_BACKING_PIXMAP) { + /* Treat this like a window, and require accelerated + * scrolling i.e. overlapped blits. + */ + return I915_TILING_X; + } + return sna_damage_is_all(&priv->cpu_damage, pixmap->drawable.width, pixmap->drawable.height) ? I915_TILING_Y : sna->default_tiling; |