added the notion of fixed-size buffers

the new native_window_set_buffers_geometry allows
to specify a size and format for all buffers to be
dequeued. the buffer will be scalled to the window's
size.

Change-Id: I2c378b85c88d29cdd827a5f319d5c704d79ba381
diff --git a/include/private/surfaceflinger/SharedBufferStack.h b/include/private/surfaceflinger/SharedBufferStack.h
index de54870..ea8391d 100644
--- a/include/private/surfaceflinger/SharedBufferStack.h
+++ b/include/private/surfaceflinger/SharedBufferStack.h
@@ -279,7 +279,8 @@
     ssize_t retireAndLock();
     status_t unlock(int buffer);
     void setStatus(status_t status);
-    status_t reallocate();
+    status_t reallocateAll();
+    status_t reallocateAllExcept(int buffer);
     status_t assertReallocate(int buffer);
     int32_t getQueuedCount() const;
     Region getDirtyRegion(int buffer) const;