From Mathias Fröhlich, txf plugin for reading .txf textured texture files.

src/osgPlugins/txf/ReaderWriterTXF.cpp

@@ -0,0 +1,62 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 2006 Mathias Froehlich
+ *
+ * This library is open source and may be redistributed and/or modified under
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ *
+ * This library 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
+ * OpenSceneGraph Public License for more details.
+*/
+
+#include <fstream>
+
+#include <osgDB/FileNameUtils>
+#include <osgDB/FileUtils>
+#include <osgDB/Registry>
+#include <osg/Notify>
+
+#include "TXFFont.h"
+
+class ReaderWriterTXF : public osgDB::ReaderWriter
+{
+    public:
+        virtual const char* className() const { return "TXF Font Reader/Writer"; }
+        
+        virtual bool acceptsExtension(const std::string& extension) const
+        {
+            return osgDB::equalCaseInsensitive(extension, "txf"); // GLU texture fonts
+        }
+
+        virtual ReadResult readObject(const std::string& file, const osgDB::ReaderWriter::Options* options) const
+        {
+            std::string ext = osgDB::getLowerCaseFileExtension(file);
+            if (!acceptsExtension(ext)) return ReadResult::FILE_NOT_HANDLED;
+
+            std::string fileName = osgDB::findDataFile(file, options);
+            if (fileName.empty()) return ReadResult::FILE_NOT_FOUND;
+
+            std::ifstream stream;
+            stream.open(fileName.c_str(), std::ios::in);
+            if (!stream.is_open()) return ReadResult::FILE_NOT_FOUND;
+
+            TXFFont* impl = new TXFFont(fileName);
+            osg::ref_ptr<osgText::Font> font = new osgText::Font(impl);
+            if (!impl->loadFont(stream)) return ReadResult::FILE_NOT_HANDLED;
+            return font.release();
+        }
+
+        virtual ReadResult readObject(std::istream& stream, const osgDB::ReaderWriter::Options*) const
+        {
+            TXFFont* impl = new TXFFont("streamed font");
+            osg::ref_ptr<osgText::Font> font = new osgText::Font(impl);
+            if (!impl->loadFont(stream)) return ReadResult::FILE_NOT_HANDLED;
+            return font.release();
+        }
+};
+
+// now register with Registry to instantiate the above
+// reader/writer.
+osgDB::RegisterReaderWriterProxy<ReaderWriterTXF> g_readerWriter_TXF_Proxy;