1 files changed, 108 insertions, 0 deletions
diff --git a/test/dw/dw_imgbuf_mem_test.cc b/test/dw/dw_imgbuf_mem_test.cc
new file mode 100644
index 00000000..e2532ea7
--- /dev/null
+++ b/test/dw/dw_imgbuf_mem_test.cc
@@ -0,0 +1,108 @@
+/*
+ * Dillo Widget
+ *
+ * Copyright 2005-2007 Sebastian Geerken <sgeerken@dillo.org>
+ *
+ * This program 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.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "../dw/core.hh"
+#include "../dw/fltkcore.hh"
+
+using namespace lout::signal;
+using namespace dw::core;
+using namespace dw::fltk;
+
+void solution1 ()
+{
+   FltkPlatform *platform = new FltkPlatform ();
+   Layout *layout = new Layout (platform);
+
+   Imgbuf *rootbuf = layout->createImgbuf (Imgbuf::RGB, 100, 100, 1);
+   rootbuf->ref (); // Extra reference by the dicache.
+   printf ("=== Can be deleted? %s.\n",
+           rootbuf->lastReference () ? "Yes" : "No");
+   Imgbuf *scaledbuf = rootbuf->getScaledBuf (50, 50);
+   printf ("=== Can be deleted? %s.\n",
+           rootbuf->lastReference () ? "Yes" : "No");
+   rootbuf->unref ();
+   printf ("=== Can be deleted? %s.\n",
+           rootbuf->lastReference () ? "Yes" : "No");
+   scaledbuf->unref ();
+   printf ("=== Can be deleted? %s.\n",
+           rootbuf->lastReference () ? "Yes" : "No");
+   rootbuf->unref (); // Extra reference by the dicache.
+
+   delete layout;
+}
+
+void solution2 ()
+{
+   FltkPlatform *platform = new FltkPlatform ();
+   Layout *layout = new Layout (platform);
+
+   Imgbuf *rootbuf = layout->createImgbuf (Imgbuf::RGB, 100, 100, 1);
+   rootbuf->setDeleteOnUnref (false);
+   printf ("=== Can be deleted? %s.\n",
+           !rootbuf->isReferred () ? "Yes" : "No");
+   Imgbuf *scaledbuf = rootbuf->getScaledBuf (50, 50);
+   printf ("=== Can be deleted? %s.\n",
+           !rootbuf->isReferred () ? "Yes" : "No");
+   rootbuf->unref ();
+   printf ("=== Can be deleted? %s.\n",
+           !rootbuf->isReferred () ? "Yes" : "No");
+   scaledbuf->unref ();
+   printf ("=== Can be deleted? %s.\n",
+           !rootbuf->isReferred () ? "Yes" : "No");
+   delete rootbuf;
+
+   delete layout;
+}
+
+class RootbufDeletionReceiver: public ObservedObject::DeletionReceiver
+{
+   void deleted (ObservedObject *object);
+};
+
+void RootbufDeletionReceiver::deleted (ObservedObject *object)
+{
+   printf ("=== Is deleted now.\n");
+   delete this;
+}
+
+void solution3 ()
+{
+   FltkPlatform *platform = new FltkPlatform ();
+   Layout *layout = new Layout (platform);
+
+   Imgbuf *rootbuf = layout->createImgbuf (Imgbuf::RGB, 100, 100, 1);
+   rootbuf->connectDeletion (new RootbufDeletionReceiver ());
+   Imgbuf *scaledbuf = rootbuf->getScaledBuf (50, 50);
+   rootbuf->unref ();
+   scaledbuf->unref ();
+
+   delete layout;
+}
+
+int main (int argc, char **argv)
+{
+   printf ("========== SOLUTION 1 ==========\n");
+   solution1 ();
+   printf ("========== SOLUTION 2 ==========\n");
+   solution2 ();
+   printf ("========== SOLUTION 3 ==========\n");
+   solution3 ();
+
+   return 0;
+}