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+/*******************************************************************************
+  Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
+ 
+  (c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com) and
+                            Jerremy Koot (jkoot@snes9x.com)
+
+  (c) Copyright 2001 - 2004 John Weidman (jweidman@slip.net)
+
+  (c) Copyright 2002 - 2004 Brad Jorsch (anomie@users.sourceforge.net),
+                            funkyass (funkyass@spam.shaw.ca),
+                            Joel Yliluoma (http://iki.fi/bisqwit/)
+                            Kris Bleakley (codeviolation@hotmail.com),
+                            Matthew Kendora,
+                            Nach (n-a-c-h@users.sourceforge.net),
+                            Peter Bortas (peter@bortas.org) and
+                            zones (kasumitokoduck@yahoo.com)
+
+  C4 x86 assembler and some C emulation code
+  (c) Copyright 2000 - 2003 zsKnight (zsknight@zsnes.com),
+                            _Demo_ (_demo_@zsnes.com), and Nach
+
+  C4 C++ code
+  (c) Copyright 2003 Brad Jorsch
+
+  DSP-1 emulator code
+  (c) Copyright 1998 - 2004 Ivar (ivar@snes9x.com), _Demo_, Gary Henderson,
+                            John Weidman, neviksti (neviksti@hotmail.com),
+                            Kris Bleakley, Andreas Naive
+
+  DSP-2 emulator code
+  (c) Copyright 2003 Kris Bleakley, John Weidman, neviksti, Matthew Kendora, and
+                     Lord Nightmare (lord_nightmare@users.sourceforge.net
+
+  OBC1 emulator code
+  (c) Copyright 2001 - 2004 zsKnight, pagefault (pagefault@zsnes.com) and
+                            Kris Bleakley
+  Ported from x86 assembler to C by sanmaiwashi
+
+  SPC7110 and RTC C++ emulator code
+  (c) Copyright 2002 Matthew Kendora with research by
+                     zsKnight, John Weidman, and Dark Force
+
+  S-DD1 C emulator code
+  (c) Copyright 2003 Brad Jorsch with research by
+                     Andreas Naive and John Weidman
+ 
+  S-RTC C emulator code
+  (c) Copyright 2001 John Weidman
+  
+  ST010 C++ emulator code
+  (c) Copyright 2003 Feather, Kris Bleakley, John Weidman and Matthew Kendora
+
+  Super FX x86 assembler emulator code 
+  (c) Copyright 1998 - 2003 zsKnight, _Demo_, and pagefault 
+
+  Super FX C emulator code 
+  (c) Copyright 1997 - 1999 Ivar, Gary Henderson and John Weidman
+
+
+  SH assembler code partly based on x86 assembler code
+  (c) Copyright 2002 - 2004 Marcus Comstedt (marcus@mc.pp.se) 
+
+ 
+  Specific ports contains the works of other authors. See headers in
+  individual files.
+ 
+  Snes9x homepage: http://www.snes9x.com
+ 
+  Permission to use, copy, modify and distribute Snes9x in both binary and
+  source form, for non-commercial purposes, is hereby granted without fee,
+  providing that this license information and copyright notice appear with
+  all copies and any derived work.
+ 
+  This software is provided 'as-is', without any express or implied
+  warranty. In no event shall the authors be held liable for any damages
+  arising from the use of this software.
+ 
+  Snes9x is freeware for PERSONAL USE only. Commercial users should
+  seek permission of the copyright holders first. Commercial use includes
+  charging money for Snes9x or software derived from Snes9x.
+ 
+  The copyright holders request that bug fixes and improvements to the code
+  should be forwarded to them so everyone can benefit from the modifications
+  in future versions.
+ 
+  Super NES and Super Nintendo Entertainment System are trademarks of
+  Nintendo Co., Limited and its subsidiary companies.
+*******************************************************************************/
+#ifndef _TILE_H_
+#define _TILE_H_
+
+#define TILE_PREAMBLE \
+    uint8 *pCache; \
+\
+    uint32 TileAddr = BG.TileAddress + ((Tile & 0x3ff) << BG.TileShift); \
+    if ((Tile & 0x1ff) >= 256) \
+	TileAddr += BG.NameSelect; \
+\
+    TileAddr &= 0xffff; \
+\
+    uint32 TileNumber; \
+    pCache = &BG.Buffer[(TileNumber = (TileAddr >> BG.TileShift)) << 6]; \
+\
+    if (!BG.Buffered [TileNumber]) \
+	BG.Buffered[TileNumber] = ConvertTile (pCache, TileAddr); \
+\
+    if (BG.Buffered [TileNumber] == BLANK_TILE) \
+	return; \
+\
+    register uint32 l; \
+    if (BG.DirectColourMode) \
+    { \
+	if (IPPU.DirectColourMapsNeedRebuild) \
+            S9xBuildDirectColourMaps (); \
+        GFX.ScreenColors = DirectColourMaps [(Tile >> 10) & BG.PaletteMask]; \
+    } \
+    else \
+	GFX.ScreenColors = &IPPU.ScreenColors [(((Tile >> 10) & BG.PaletteMask) << BG.PaletteShift) + BG.StartPalette];
+
+#define RENDER_TILE(NORMAL, FLIPPED, N) \
+    if (!(Tile & (V_FLIP | H_FLIP))) \
+    { \
+	bp = pCache + StartLine; \
+	for (l = LineCount; l != 0; l--, bp += 8, Offset += GFX.PPL) \
+	{ \
+	    if (*(uint32 *) bp) \
+		NORMAL (Offset, bp); \
+	    if (*(uint32 *) (bp + 4)) \
+		NORMAL (Offset + N, bp + 4); \
+	} \
+    } \
+    else \
+    if (!(Tile & V_FLIP)) \
+    { \
+	bp = pCache + StartLine; \
+	for (l = LineCount; l != 0; l--, bp += 8, Offset += GFX.PPL) \
+	{ \
+	    if (*(uint32 *) (bp + 4)) \
+		FLIPPED (Offset, bp + 4); \
+	    if (*(uint32 *) bp) \
+		FLIPPED (Offset + N, bp); \
+	} \
+    } \
+    else \
+    if (Tile & H_FLIP) \
+    { \
+	bp = pCache + 56 - StartLine; \
+	for (l = LineCount; l != 0; l--, bp -= 8, Offset += GFX.PPL) \
+	{ \
+	    if (*(uint32 *) (bp + 4)) \
+		FLIPPED (Offset, bp + 4); \
+	    if (*(uint32 *) bp) \
+		FLIPPED (Offset + N, bp); \
+	} \
+    } \
+    else \
+    { \
+	bp = pCache + 56 - StartLine; \
+	for (l = LineCount; l != 0; l--, bp -= 8, Offset += GFX.PPL) \
+	{ \
+	    if (*(uint32 *) bp) \
+		NORMAL (Offset, bp); \
+	    if (*(uint32 *) (bp + 4)) \
+		NORMAL (Offset + N, bp + 4); \
+	} \
+    }
+
+#define TILE_CLIP_PREAMBLE \
+    uint32 dd; \
+    uint32 d1; \
+    uint32 d2; \
+\
+    if (StartPixel < 4) \
+    { \
+	d1 = HeadMask [StartPixel]; \
+	if (StartPixel + Width < 4) \
+	    d1 &= TailMask [StartPixel + Width]; \
+    } \
+    else \
+	d1 = 0; \
+\
+    if (StartPixel + Width > 4) \
+    { \
+	if (StartPixel > 4) \
+	    d2 = HeadMask [StartPixel - 4]; \
+	else \
+	    d2 = 0xffffffff; \
+\
+	d2 &= TailMask [(StartPixel + Width - 4)]; \
+    } \
+    else \
+	d2 = 0;
+
+
+#define RENDER_CLIPPED_TILE(NORMAL, FLIPPED, N) \
+    if (!(Tile & (V_FLIP | H_FLIP))) \
+    { \
+	bp = pCache + StartLine; \
+	for (l = LineCount; l != 0; l--, bp += 8, Offset += GFX.PPL) \
+	{ \
+	    if ((dd = (*(uint32 *) bp) & d1)) \
+		NORMAL (Offset, (uint8 *) &dd); \
+	    if ((dd = (*(uint32 *) (bp + 4)) & d2)) \
+		NORMAL (Offset + N, (uint8 *) &dd); \
+	} \
+    } \
+    else \
+    if (!(Tile & V_FLIP)) \
+    { \
+	bp = pCache + StartLine; \
+	SWAP_DWORD (d1); \
+	SWAP_DWORD (d2); \
+	for (l = LineCount; l != 0; l--, bp += 8, Offset += GFX.PPL) \
+	{ \
+	    if ((dd = *(uint32 *) (bp + 4) & d1)) \
+		FLIPPED (Offset, (uint8 *) &dd); \
+	    if ((dd = *(uint32 *) bp & d2)) \
+		FLIPPED (Offset + N, (uint8 *) &dd); \
+	} \
+    } \
+    else \
+    if (Tile & H_FLIP) \
+    { \
+	bp = pCache + 56 - StartLine; \
+	SWAP_DWORD (d1); \
+	SWAP_DWORD (d2); \
+	for (l = LineCount; l != 0; l--, bp -= 8, Offset += GFX.PPL) \
+	{ \
+	    if ((dd = *(uint32 *) (bp + 4) & d1)) \
+		FLIPPED (Offset, (uint8 *) &dd); \
+	    if ((dd = *(uint32 *) bp & d2)) \
+		FLIPPED (Offset + N, (uint8 *) &dd); \
+	} \
+    } \
+    else \
+    { \
+	bp = pCache + 56 - StartLine; \
+	for (l = LineCount; l != 0; l--, bp -= 8, Offset += GFX.PPL) \
+	{ \
+	    if ((dd = (*(uint32 *) bp) & d1)) \
+		NORMAL (Offset, (uint8 *) &dd); \
+	    if ((dd = (*(uint32 *) (bp + 4)) & d2)) \
+		NORMAL (Offset + N, (uint8 *) &dd); \
+	} \
+    }
+
+#define RENDER_TILE_LARGE(PIXEL, FUNCTION) \
+    if (!(Tile & (V_FLIP | H_FLIP))) \
+    { \
+	if ((pixel = *(pCache + StartLine + StartPixel))) \
+	{ \
+	    pixel = PIXEL; \
+	    for (l = LineCount; l != 0; l--, sp += GFX.PPL, Depth += GFX.PPL) \
+	    { \
+		for (int z = Pixels - 1; z >= 0; z--) \
+		    if (GFX.Z1 > Depth [z]) \
+		    { \
+			sp [z] = FUNCTION(sp + z, pixel); \
+			Depth [z] = GFX.Z2; \
+		    }\
+	    } \
+	} \
+    } \
+    else \
+    if (!(Tile & V_FLIP)) \
+    { \
+	StartPixel = 7 - StartPixel; \
+	if ((pixel = *(pCache + StartLine + StartPixel))) \
+	{ \
+	    pixel = PIXEL; \
+	    for (l = LineCount; l != 0; l--, sp += GFX.PPL, Depth += GFX.PPL) \
+	    { \
+		for (int z = Pixels - 1; z >= 0; z--) \
+		    if (GFX.Z1 > Depth [z]) \
+		    { \
+			sp [z] = FUNCTION(sp + z, pixel); \
+			Depth [z] = GFX.Z2; \
+		    }\
+	    } \
+	} \
+    } \
+    else \
+    if (Tile & H_FLIP) \
+    { \
+	StartPixel = 7 - StartPixel; \
+	if ((pixel = *(pCache + 56 - StartLine + StartPixel))) \
+	{ \
+	    pixel = PIXEL; \
+	    for (l = LineCount; l != 0; l--, sp += GFX.PPL, Depth += GFX.PPL) \
+	    { \
+		for (int z = Pixels - 1; z >= 0; z--) \
+		    if (GFX.Z1 > Depth [z]) \
+		    { \
+			sp [z] = FUNCTION(sp + z, pixel); \
+			Depth [z] = GFX.Z2; \
+		    }\
+	    } \
+	} \
+    } \
+    else \
+    { \
+	if ((pixel = *(pCache + 56 - StartLine + StartPixel))) \
+	{ \
+	    pixel = PIXEL; \
+	    for (l = LineCount; l != 0; l--, sp += GFX.PPL, Depth += GFX.PPL) \
+	    { \
+		for (int z = Pixels - 1; z >= 0; z--) \
+		    if (GFX.Z1 > Depth [z]) \
+		    { \
+			sp [z] = FUNCTION(sp + z, pixel); \
+			Depth [z] = GFX.Z2; \
+		    }\
+	    } \
+	} \
+    }
+#endif
+