Committed patch #2050337 "KYRA/SCUMM: Thumbnail support/improvement". (Without Max' compressed backward seeking support for now)

svn-id: r34053

1 files changed, 69 insertions, 0 deletions

diff --git a/graphics/thumbnail.h b/graphics/thumbnail.h
new file mode 100644
index 0000000000..0553306519
--- /dev/null
+++ b/graphics/thumbnail.h
@@ -0,0 +1,69 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ */
+
+#ifndef GRAPHICS_THUMBNAIL_H
+#define GRAPHICS_THUMBNAIL_H
+
+#include "common/stream.h"
+#include "graphics/surface.h"
+
+namespace Graphics {
+
+/**
+ * Checks for presence of the thumbnail save header.
+ * Seeks automatically back to start position after check.
+ *
+ * @param in	stream to check for header
+ */
+bool checkThumbnailHeader(Common::SeekableReadStream &in);
+
+/**
+ * Skips a thumbnail header, if present.
+ *
+ * @param in	stream to process
+ */
+bool skipThumbnailHeader(Common::SeekableReadStream &in);
+
+/**
+ * Lodas a thumbnail from the given input stream.
+ * The loaded thumbnail will be automatically converted to the
+ * current overlay pixelformat.
+ */
+bool loadThumbnail(Common::SeekableReadStream &in, Graphics::Surface &to);
+
+/**
+ * Saves a thumbnail to the given write stream.
+ * Automatically creates a thumbnail from screen contents.
+ */
+bool saveThumbnail(Common::WriteStream &out);
+
+/**
+ * Saves a (given) thumbnail to the given write stream.
+ */
+bool saveThumbnail(Common::WriteStream &out, const Graphics::Surface &thumb);
+
+} // end of namespace Graphics
+
+#endif
+