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diff --git a/source/gles2glide64/src/GlideHQ/TxFilter.h b/source/gles2glide64/src/GlideHQ/TxFilter.h
new file mode 100644
index 0000000..bdbfe1b
--- /dev/null
+++ b/source/gles2glide64/src/GlideHQ/TxFilter.h
@@ -0,0 +1,83 @@
+/*
+ * Texture Filtering
+ * Version:  1.0
+ *
+ * Copyright (C) 2007  Hiroshi Morii   All Rights Reserved.
+ * Email koolsmoky(at)users.sourceforge.net
+ * Web   http://www.3dfxzone.it/koolsmoky
+ *
+ * this 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, or (at your option)
+ * any later version.
+ *
+ * this 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 GNU Make; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __TXFILTER_H__
+#define __TXFILTER_H__
+
+#include "TxInternal.h"
+#include "TxQuantize.h"
+#include "TxHiResCache.h"
+#include "TxTexCache.h"
+#include "TxUtil.h"
+#include "TxImage.h"
+#include <string>
+
+class TxFilter
+{
+private:
+  int _numcore;
+
+  uint8 *_tex1;
+  uint8 *_tex2;
+  int _maxwidth;
+  int _maxheight;
+  int _maxbpp;
+  int _options;
+  int _cacheSize;
+  std::wstring _ident;
+  std::wstring _datapath;
+  std::wstring _cachepath;
+  TxQuantize *_txQuantize;
+  TxTexCache *_txTexCache;
+  TxHiResCache *_txHiResCache;
+  TxUtil *_txUtil;
+  TxImage *_txImage;
+  boolean _initialized;
+  void clear();
+public:
+  ~TxFilter();
+  TxFilter(int maxwidth,
+           int maxheight,
+           int maxbpp,
+           int options,
+           int cachesize,
+           wchar_t *datapath,
+           wchar_t *cachepath,
+           wchar_t *ident,
+           dispInfoFuncExt callback);
+  boolean filter(uint8 *src,
+                  int srcwidth,
+                  int srcheight,
+                  uint16 srcformat,
+                  uint64 g64crc, /* glide64 crc, 64bit for future use */
+                  GHQTexInfo *info);
+  boolean hirestex(uint64 g64crc, /* glide64 crc, 64bit for future use */
+                      uint64 r_crc64,   /* checksum hi:palette low:texture */
+                      uint16 *palette,
+                      GHQTexInfo *info);
+  uint64 checksum64(uint8 *src, int width, int height, int size, int rowStride, uint8 *palette);
+  boolean dmptx(uint8 *src, int width, int height, int rowStridePixel, uint16 gfmt, uint16 n64fmt, uint64 r_crc64);
+  boolean reloadhirestex();
+};
+
+#endif /* __TXFILTER_H__ */