--- deliantra/server/utils/cfhq2xa.C	2007/04/01 00:36:35	1.1
+++ deliantra/server/utils/cfhq2xa.C	2010/03/26 00:59:22	1.9
@@ -1,22 +1,27 @@
-//hq2xa filter
-//----------------------------------------------------------
-//Copyright (C) 2003 MaxSt ( maxst@hiend3d.com )
-//Copyright (C) 2006 Marc Lehmann <pcg@goof.com>
-//                   converted to RGBA, cleaned up
-
-//This program 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 2.1 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
-//Lesser General Public License for more details.
-//
-//You should have received a copy of the GNU Lesser General Public
-//License along with this program; if not, write to the Free Software
-//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+/*
+ * This file is part of Deliantra, the Roguelike Realtime MMORPG.
+ * 
+ * Copyright (©) 2007 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
+ * Copyright (©) 2003 MaxSt <maxst@hiend3d.com>
+ * 
+ * Deliantra is free software: you can redistribute it and/or modify it under
+ * the terms of the Affero GNU General Public License as published by the
+ * Free Software Foundation, either version 3 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 Affero GNU General Public License
+ * and the GNU General Public License along with this program. If not, see
+ * <http://www.gnu.org/licenses/>.
+ * 
+ * The authors can be reached via e-mail to <support@deliantra.net>
+ */
+
+// note: the original code was released under the LGPL version 2.1
 
 #include <cstdio>
 #include <cstring>
@@ -63,7 +68,7 @@
   return ((((c1 >> shift) & Cmask) * w1 + ((c2 >> shift) & Cmask) * w2 + ((c3 >> shift) & Cmask) * w3 + w / 2) / w) << shift;
 }
 
-inline void lerp (unsigned char *pc, pixel c1, int w1, pixel c2, int w2, pixel c3 = 0, int w3 = 0)
+static inline void lerp (unsigned char *pc, pixel c1, int w1, pixel c2, int w2, pixel c3 = 0, int w3 = 0)
 {
   *(pixel *)pc = lerp (c1, w1, c2, w2, c3, w3, Rshift)
                | lerp (c1, w1, c2, w2, c3, w3, Gshift)
@@ -71,37 +76,37 @@
                | lerp (c1, w1, c2, w2, c3, w3, Ashift);
 }
 
-inline void Interp1 (unsigned char *pc, pixel c1, pixel c2)
+static inline void Interp1 (unsigned char *pc, pixel c1, pixel c2)
 {
   lerp (pc, c1, 3, c2, 1);
 }
 
-inline void Interp2 (unsigned char *pc, pixel c1, pixel c2, pixel c3)
+static inline void Interp2 (unsigned char *pc, pixel c1, pixel c2, pixel c3)
 {
   lerp (pc, c1, 2, c2, 1, c3, 1);
 }
 
-inline void Interp5 (unsigned char *pc, pixel c1, pixel c2)
+static inline void Interp5 (unsigned char *pc, pixel c1, pixel c2)
 {
   lerp (pc, c1, 1, c2, 1);
 }
 
-inline void Interp6 (unsigned char *pc, pixel c1, pixel c2, pixel c3)
+static inline void Interp6 (unsigned char *pc, pixel c1, pixel c2, pixel c3)
 {
   lerp (pc, c1, 5, c2, 2, c3, 1);
 }
 
-inline void Interp7 (unsigned char *pc, pixel c1, pixel c2, pixel c3)
+static inline void Interp7 (unsigned char *pc, pixel c1, pixel c2, pixel c3)
 {
   lerp (pc, c1, 6, c2, 1, c3, 1);
 }
 
-inline void Interp9 (unsigned char *pc, pixel c1, pixel c2, pixel c3)
+static inline void Interp9 (unsigned char *pc, pixel c1, pixel c2, pixel c3)
 {
   lerp (pc, c1, 2, c2, 3, c2, 3);
 }
 
-inline void Interp10 (unsigned char *pc, pixel c1, pixel c2, pixel c3)
+static inline void Interp10 (unsigned char *pc, pixel c1, pixel c2, pixel c3)
 {
   lerp (pc, c1, 14, c2, 1, c3, 1);
 }
@@ -155,7 +160,7 @@
 #define PIXEL11_90    Interp9(pOut+BpL + sizeof (pixel), w[5], w[6], w[8]);
 #define PIXEL11_100   Interp10(pOut+BpL + sizeof (pixel), w[5], w[6], w[8]);
 
-inline pixel RGBAtoYUVA (pixel w)
+static inline pixel RGBAtoYUVA (pixel w)
 {
   int r = (w >> Rshift) & Cmask;
   int g = (w >> Gshift) & Cmask;
@@ -172,7 +177,7 @@
        | (a << Ashift);
 }
 
-inline bool Diff (pixel w1, pixel w2)
+static inline bool Diff (pixel w1, pixel w2)
 {
   pixel YUV1 = RGBAtoYUVA (w1);
   pixel YUV2 = RGBAtoYUVA (w2);
@@ -183,23 +188,20 @@
           (abs (((YUV1 >> Ashift) & Cmask) - ((YUV2 >> Ashift) & Cmask)) > trA) );
 }
 
-void
+static void
 hq2x_32 (unsigned char *pIn, unsigned char *pOut, int Xres, int Yres, int BpL, bool wrap)
 {
   int i, j, k;
   int prevline, nextline;
   pixel w[10];
 
-  //   +----+----+----+
-  //   |    |    |    |
-  //   | w1 | w2 | w3 |
-  //   +----+----+----+
-  //   |    |    |    |
-  //   | w4 | w5 | w6 |
-  //   +----+----+----+
-  //   |    |    |    |
-  //   | w7 | w8 | w9 |
-  //   +----+----+----+
+  //   +--+--+--+
+  //   |w1|w2|w3|
+  //   +--+--+--+
+  //   |w4|w5|w6|
+  //   +--+--+--+
+  //   |w7|w8|w9|
+  //   +--+--+--+
 
   for (j = 0; j < Yres; j++)
     {