if no b/a area enabled some speed up when opening images

rtgui/bqentryupdater.h

@@ -0,0 +1,62 @@
+/*
+ *  This file is part of RawTherapee.
+ *
+ *  Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
+ *
+ *  RawTherapee is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ * 
+ *  RawTherapee is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with RawTherapee.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _BQENTRYUPDATER_
+#define _BQENTRYUPDATER_
+
+#include <glibmm.h>
+#include <rtengine.h>
+#include <thumbnail.h>
+
+class BQEntryUpdateListener {
+
+    public:
+        virtual void updateImage (guint8* img, int w, int h) {}
+};
+
+class BatchQueueEntryUpdater {
+
+    struct Job {
+        guint8* oimg;
+        int ow, oh, newh;
+        BQEntryUpdateListener* listener;
+    };
+
+  protected:
+    bool tostop;
+    bool stopped;
+    std::list<Job> jqueue;
+    Glib::Thread* thread;
+    Glib::Mutex* qMutex;
+
+  public:
+    BatchQueueEntryUpdater ();
+
+    void add        (guint8* oimg, int ow, int oh, int newh, BQEntryUpdateListener* listener);
+    void process    ();
+    void stop       ();
+    void removeJobs ();
+    void removeJobs (BQEntryUpdateListener* listener);
+    void terminate  ();
+
+    void process_   ();
+};
+
+extern BatchQueueEntryUpdater batchQueueEntryUpdater;
+
+#endif