Add support for input rescaling:

- round extents to power of two.
- clamp max extents.
Add output options pimpl.
Other misc API changes.

src/nvtt/OutputOptions.h

@@ -0,0 +1,76 @@
+// Copyright NVIDIA Corporation 2007 -- Ignacio Castano <icastano@nvidia.com>
+// 
+// Permission is hereby granted, free of charge, to any person
+// obtaining a copy of this software and associated documentation
+// files (the "Software"), to deal in the Software without
+// restriction, including without limitation the rights to use,
+// copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following
+// conditions:
+// 
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+
+#ifndef NV_TT_OUTPUTOPTIONS_H
+#define NV_TT_OUTPUTOPTIONS_H
+
+#include <nvcore/StrLib.h>
+#include <nvcore/StdStream.h>
+#include "nvtt.h"
+
+namespace nvtt
+{
+
+	struct DefaultOutputHandler : public nvtt::OutputHandler
+	{
+		DefaultOutputHandler(const char * fileName) : stream(fileName) {}
+		
+		virtual ~DefaultOutputHandler()
+		{
+		}
+		
+		virtual void mipmap(int size, int width, int height, int depth, int face, int miplevel)
+		{
+			// ignore.
+		}
+		
+		// Output data.
+		virtual void writeData(const void * data, int size)
+		{
+			stream.serialize(const_cast<void *>(data), size);
+		}
+		
+		nv::StdOutputStream stream;
+	};
+	
+	
+	struct OutputOptions::Private
+	{
+		nv::Path fileName;
+		
+		mutable OutputHandler * outputHandler;
+		mutable ErrorHandler * errorHandler;
+		mutable bool outputHeader;
+		
+		bool openFile() const;
+		void closeFile() const;
+	};
+
+	// @@ temporary hack to copy public attributes to pimpl.
+	void initOptions(OutputOptions * outputOptions);
+	
+	
+} // nvtt namespace
+
+
+#endif // NV_TT_OUTPUTOPTIONS_H