summaryrefslogtreecommitdiff
path: root/plugingui/imagecache.h
diff options
context:
space:
mode:
authorBent Bisballe Nyeng <deva@aasimon.org>2016-06-02 21:00:37 +0200
committerBent Bisballe Nyeng <deva@aasimon.org>2016-06-02 21:00:37 +0200
commitab7ab9e52ab87963831f90ab25957d883878654d (patch)
tree2225a4382497889f43477429d2f6b696ce04bf8f /plugingui/imagecache.h
parent1d6833cfcb0b5bf4890fa15b5013d7490af48f69 (diff)
New ImageCache class for reusing Image resources.
Diffstat (limited to 'plugingui/imagecache.h')
-rw-r--r--plugingui/imagecache.h72
1 files changed, 72 insertions, 0 deletions
diff --git a/plugingui/imagecache.h b/plugingui/imagecache.h
new file mode 100644
index 0000000..9ca28fb
--- /dev/null
+++ b/plugingui/imagecache.h
@@ -0,0 +1,72 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ * imagecache.h
+ *
+ * Thu Jun 2 17:12:05 CEST 2016
+ * Copyright 2016 Bent Bisballe Nyeng
+ * deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ * This file is part of DrumGizmo.
+ *
+ * DrumGizmo is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * DrumGizmo 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with DrumGizmo; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+#pragma once
+
+#include <string>
+#include <map>
+#include <utility>
+
+namespace GUI
+{
+
+class Image;
+class ImageCache;
+
+class ScopedImageBorrower
+{
+public:
+ ScopedImageBorrower(ImageCache& imageCache, const std::string& filename);
+ ScopedImageBorrower(ScopedImageBorrower&& other);
+ ~ScopedImageBorrower();
+
+ ScopedImageBorrower& operator=(ScopedImageBorrower&& other);
+
+ Image& operator*();
+ Image& operator()();
+
+private:
+ ImageCache& imageCache;
+ std::string filename;
+ Image& image;
+};
+
+class ImageCache
+{
+public:
+ ScopedImageBorrower getImage(const std::string& filename);
+
+private:
+ friend class ScopedImageBorrower;
+
+ Image& borrow(const std::string& filename);
+ void giveBack(const std::string& filename);
+
+protected:
+ std::map<std::string, std::pair<std::size_t, Image>> imageCache;
+};
+
+} // GUI::