Make compositor handle subsurfaces with shm buffers.

So we'r lying for now for shm buffers, and assuming they
have allways been displayed.

Also, this patch fixes so that if you attach a buffer, and the last
buffer has not gotten any damages, then it will be released.

Change-Id: Id1b9789aa8e4dcff75147f6c96220039defc0d8f
Sanity-Review: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Paul Olav Tvete <paul.tvete@nokia.com>

diff --git a/src/compositor/wayland_wrapper/wlsurface.cpp b/src/compositor/wayland_wrapper/wlsurface.cpp
index c638868..7acd379 100644 (file)
--- a/src/compositor/wayland_wrapper/wlsurface.cpp
+++ b/src/compositor/wayland_wrapper/wlsurface.cpp
@@ -151,7 +151,7 @@ public:
     void setFinished() { m_is_frame_finished = true; }
 
     inline bool isPosted() const { return m_is_posted; }
-    inline bool isDisplayed() const { return m_texture || m_is_posted; }
+    inline bool isDisplayed() const { return m_texture || m_is_posted || wl_buffer_is_shm(m_buffer); }
     inline bool isFinished() const { return m_is_frame_finished; }
 
     inline QRect damageRect() const { return m_damageRect; }
@@ -544,6 +544,11 @@ void Surface::attach(struct wl_buffer *buffer)
         d->surfaceBuffer = 0;
     }
 #endif
+    SurfaceBuffer *last = d->bufferQueue.size()?d->bufferQueue.last():0;
+    if (last && !last->damageRect().isValid()) {
+        last->destructBufferState();
+        d->bufferQueue.takeLast();
+    }
     d->bufferQueue << newBuffer;
 }