2010-09-25 17:46:12 +02:00
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/***********************************************************************************
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Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
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(c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com),
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Jerremy Koot (jkoot@snes9x.com)
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(c) Copyright 2002 - 2004 Matthew Kendora
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(c) Copyright 2002 - 2005 Peter Bortas (peter@bortas.org)
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(c) Copyright 2004 - 2005 Joel Yliluoma (http://iki.fi/bisqwit/)
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(c) Copyright 2001 - 2006 John Weidman (jweidman@slip.net)
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(c) Copyright 2002 - 2006 funkyass (funkyass@spam.shaw.ca),
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Kris Bleakley (codeviolation@hotmail.com)
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(c) Copyright 2002 - 2010 Brad Jorsch (anomie@users.sourceforge.net),
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Nach (n-a-c-h@users.sourceforge.net),
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2011-04-11 21:51:20 +02:00
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(c) Copyright 2002 - 2011 zones (kasumitokoduck@yahoo.com)
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2010-09-25 17:46:12 +02:00
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(c) Copyright 2006 - 2007 nitsuja
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2018-05-25 22:43:57 +02:00
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(c) Copyright 2009 - 2018 BearOso,
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2010-09-25 17:46:12 +02:00
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OV2
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2017-11-17 23:00:58 +01:00
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(c) Copyright 2017 qwertymodo
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(c) Copyright 2011 - 2017 Hans-Kristian Arntzen,
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2016-10-15 18:31:26 +02:00
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Daniel De Matteis
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(Under no circumstances will commercial rights be given)
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2010-09-25 17:46:12 +02:00
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BS-X C emulator code
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(c) Copyright 2005 - 2006 Dreamer Nom,
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zones
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C4 x86 assembler and some C emulation code
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(c) Copyright 2000 - 2003 _Demo_ (_demo_@zsnes.com),
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Nach,
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zsKnight (zsknight@zsnes.com)
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C4 C++ code
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(c) Copyright 2003 - 2006 Brad Jorsch,
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Nach
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DSP-1 emulator code
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(c) Copyright 1998 - 2006 _Demo_,
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Andreas Naive (andreasnaive@gmail.com),
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Gary Henderson,
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Ivar (ivar@snes9x.com),
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John Weidman,
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Kris Bleakley,
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Matthew Kendora,
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Nach,
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neviksti (neviksti@hotmail.com)
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DSP-2 emulator code
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(c) Copyright 2003 John Weidman,
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Kris Bleakley,
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Lord Nightmare (lord_nightmare@users.sourceforge.net),
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Matthew Kendora,
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neviksti
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DSP-3 emulator code
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(c) Copyright 2003 - 2006 John Weidman,
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Kris Bleakley,
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Lancer,
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z80 gaiden
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DSP-4 emulator code
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(c) Copyright 2004 - 2006 Dreamer Nom,
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John Weidman,
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Kris Bleakley,
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Nach,
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z80 gaiden
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OBC1 emulator code
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(c) Copyright 2001 - 2004 zsKnight,
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pagefault (pagefault@zsnes.com),
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Kris Bleakley
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Ported from x86 assembler to C by sanmaiwashi
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SPC7110 and RTC C++ emulator code used in 1.39-1.51
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(c) Copyright 2002 Matthew Kendora with research by
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zsKnight,
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John Weidman,
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Dark Force
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SPC7110 and RTC C++ emulator code used in 1.52+
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(c) Copyright 2009 byuu,
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neviksti
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S-DD1 C emulator code
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(c) Copyright 2003 Brad Jorsch with research by
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Andreas Naive,
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John Weidman
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S-RTC C emulator code
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(c) Copyright 2001 - 2006 byuu,
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John Weidman
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ST010 C++ emulator code
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(c) Copyright 2003 Feather,
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John Weidman,
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Kris Bleakley,
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Matthew Kendora
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Super FX x86 assembler emulator code
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(c) Copyright 1998 - 2003 _Demo_,
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pagefault,
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zsKnight
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Super FX C emulator code
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(c) Copyright 1997 - 1999 Ivar,
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Gary Henderson,
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John Weidman
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Sound emulator code used in 1.5-1.51
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(c) Copyright 1998 - 2003 Brad Martin
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(c) Copyright 1998 - 2006 Charles Bilyue'
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Sound emulator code used in 1.52+
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(c) Copyright 2004 - 2007 Shay Green (gblargg@gmail.com)
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2016-10-07 19:47:07 +02:00
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S-SMP emulator code used in 1.54+
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(c) Copyright 2016 byuu
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2010-09-25 17:46:12 +02:00
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SH assembler code partly based on x86 assembler code
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(c) Copyright 2002 - 2004 Marcus Comstedt (marcus@mc.pp.se)
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2xSaI filter
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(c) Copyright 1999 - 2001 Derek Liauw Kie Fa
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HQ2x, HQ3x, HQ4x filters
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(c) Copyright 2003 Maxim Stepin (maxim@hiend3d.com)
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NTSC filter
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(c) Copyright 2006 - 2007 Shay Green
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GTK+ GUI code
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2018-05-25 22:43:57 +02:00
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(c) Copyright 2004 - 2018 BearOso
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2010-09-25 17:46:12 +02:00
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Win32 GUI code
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(c) Copyright 2003 - 2006 blip,
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funkyass,
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Matthew Kendora,
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Nach,
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nitsuja
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2018-05-25 22:43:57 +02:00
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(c) Copyright 2009 - 2018 OV2
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2010-09-25 17:46:12 +02:00
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Mac OS GUI code
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(c) Copyright 1998 - 2001 John Stiles
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2011-04-11 21:51:20 +02:00
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(c) Copyright 2001 - 2011 zones
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2010-09-25 17:46:12 +02:00
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2016-10-15 18:31:26 +02:00
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Libretro port
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2017-11-17 23:00:58 +01:00
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(c) Copyright 2011 - 2017 Hans-Kristian Arntzen,
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2016-10-15 18:31:26 +02:00
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Daniel De Matteis
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(Under no circumstances will commercial rights be given)
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2010-09-25 17:46:12 +02:00
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Specific ports contains the works of other authors. See headers in
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individual files.
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Snes9x homepage: http://www.snes9x.com/
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Permission to use, copy, modify and/or distribute Snes9x in both binary
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and source form, for non-commercial purposes, is hereby granted without
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fee, providing that this license information and copyright notice appear
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with all copies and any derived work.
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This software is provided 'as-is', without any express or implied
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warranty. In no event shall the authors be held liable for any damages
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arising from the use of this software or it's derivatives.
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Snes9x is freeware for PERSONAL USE only. Commercial users should
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seek permission of the copyright holders first. Commercial use includes,
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but is not limited to, charging money for Snes9x or software derived from
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Snes9x, including Snes9x or derivatives in commercial game bundles, and/or
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using Snes9x as a promotion for your commercial product.
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The copyright holders request that bug fixes and improvements to the code
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should be forwarded to them so everyone can benefit from the modifications
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in future versions.
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Super NES and Super Nintendo Entertainment System are trademarks of
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Nintendo Co., Limited and its subsidiary companies.
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***********************************************************************************/
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#include "snes9x.h"
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#include "memmap.h"
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static uint8 region_map[6][6] =
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{
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{ 0, 0x01, 0x03, 0x07, 0x0f, 0x1f },
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{ 0, 0, 0x02, 0x06, 0x0e, 0x1e },
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{ 0, 0, 0, 0x04, 0x0c, 0x1c },
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{ 0, 0, 0, 0, 0x08, 0x18 },
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{ 0, 0, 0, 0, 0, 0x10 }
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};
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static inline uint8 CalcWindowMask (int, uint8, uint8);
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static inline void StoreWindowRegions (uint8, struct ClipData *, int, int16 *, uint8 *, bool8, bool8 s = FALSE);
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static inline uint8 CalcWindowMask (int i, uint8 W1, uint8 W2)
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{
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if (!PPU.ClipWindow1Enable[i])
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{
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if (!PPU.ClipWindow2Enable[i])
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return (0);
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else
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{
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if (!PPU.ClipWindow2Inside[i])
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return (~W2);
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return (W2);
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}
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}
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else
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{
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if (!PPU.ClipWindow2Enable[i])
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{
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if (!PPU.ClipWindow1Inside[i])
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return (~W1);
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return (W1);
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}
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else
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{
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if (!PPU.ClipWindow1Inside[i])
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W1 = ~W1;
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if (!PPU.ClipWindow2Inside[i])
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W2 = ~W2;
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switch (PPU.ClipWindowOverlapLogic[i])
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{
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case 0: // OR
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return (W1 | W2);
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case 1: // AND
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return (W1 & W2);
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case 2: // XOR
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return (W1 ^ W2);
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case 3: // XNOR
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return (~(W1 ^ W2));
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}
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}
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}
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// Never get here
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return (0);
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}
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static inline void StoreWindowRegions (uint8 Mask, struct ClipData *Clip, int n_regions, int16 *windows, uint8 *drawing_modes, bool8 sub, bool8 StoreMode0)
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{
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int ct = 0;
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for (int j = 0; j < n_regions; j++)
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{
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int DrawMode = drawing_modes[j];
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if (sub)
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DrawMode |= 1;
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if (Mask & (1 << j))
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DrawMode = 0;
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if (!StoreMode0 && !DrawMode)
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continue;
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if (ct > 0 && Clip->Right[ct - 1] == windows[j] && Clip->DrawMode[ct - 1] == DrawMode)
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Clip->Right[ct - 1] = windows[j + 1]; // This region borders with and has the same drawing mode as the previous region: merge them.
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else
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{
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// Add a new region to the BG
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Clip->Left[ct] = windows[j];
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Clip->Right[ct] = windows[j + 1];
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Clip->DrawMode[ct] = DrawMode;
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ct++;
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}
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}
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Clip->Count = ct;
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}
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void S9xComputeClipWindows (void)
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{
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int16 windows[6] = { 0, 256, 256, 256, 256, 256 };
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uint8 drawing_modes[5] = { 0, 0, 0, 0, 0 };
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int n_regions = 1;
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int i, j;
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// Calculate window regions. We have at most 5 regions, because we have 6 control points
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// (screen edges, window 1 left & right, and window 2 left & right).
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if (PPU.Window1Left <= PPU.Window1Right)
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{
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if (PPU.Window1Left > 0)
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{
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windows[2] = 256;
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windows[1] = PPU.Window1Left;
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n_regions = 2;
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}
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if (PPU.Window1Right < 255)
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{
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windows[n_regions + 1] = 256;
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windows[n_regions] = PPU.Window1Right + 1;
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n_regions++;
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}
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}
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if (PPU.Window2Left <= PPU.Window2Right)
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{
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for (i = 0; i <= n_regions; i++)
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{
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if (PPU.Window2Left == windows[i])
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break;
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if (PPU.Window2Left < windows[i])
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{
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for (j = n_regions; j >= i; j--)
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windows[j + 1] = windows[j];
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windows[i] = PPU.Window2Left;
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n_regions++;
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break;
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}
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}
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for (; i <= n_regions; i++)
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{
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if (PPU.Window2Right + 1 == windows[i])
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|
break;
|
|
|
|
|
|
|
|
|
|
if (PPU.Window2Right + 1 < windows[i])
|
|
|
|
|
{
|
|
|
|
|
for (j = n_regions; j >= i; j--)
|
|
|
|
|
windows[j + 1] = windows[j];
|
|
|
|
|
|
|
|
|
|
windows[i] = PPU.Window2Right + 1;
|
|
|
|
|
n_regions++;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// Get a bitmap of which regions correspond to each window.
|
|
|
|
|
|
|
|
|
|
uint8 W1, W2;
|
|
|
|
|
|
|
|
|
|
if (PPU.Window1Left <= PPU.Window1Right)
|
|
|
|
|
{
|
|
|
|
|
for (i = 0; windows[i] != PPU.Window1Left; i++) ;
|
|
|
|
|
for (j = i; windows[j] != PPU.Window1Right + 1; j++) ;
|
|
|
|
|
W1 = region_map[i][j];
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
W1 = 0;
|
|
|
|
|
|
|
|
|
|
if (PPU.Window2Left <= PPU.Window2Right)
|
|
|
|
|
{
|
|
|
|
|
for (i = 0; windows[i] != PPU.Window2Left; i++) ;
|
|
|
|
|
for (j = i; windows[j] != PPU.Window2Right + 1; j++) ;
|
|
|
|
|
W2 = region_map[i][j];
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
W2 = 0;
|
|
|
|
|
|
|
|
|
|
// Color Window affects the drawing mode for each region.
|
|
|
|
|
// Modes are: 3=Draw as normal, 2=clip color (math only), 1=no math (draw only), 0=nothing.
|
|
|
|
|
|
|
|
|
|
uint8 CW_color = 0, CW_math = 0;
|
|
|
|
|
uint8 CW = CalcWindowMask(5, W1, W2);
|
|
|
|
|
|
|
|
|
|
switch (Memory.FillRAM[0x2130] & 0xc0)
|
|
|
|
|
{
|
|
|
|
|
case 0x00: CW_color = 0; break;
|
|
|
|
|
case 0x40: CW_color = ~CW; break;
|
|
|
|
|
case 0x80: CW_color = CW; break;
|
|
|
|
|
case 0xc0: CW_color = 0xff; break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
switch (Memory.FillRAM[0x2130] & 0x30)
|
|
|
|
|
{
|
|
|
|
|
case 0x00: CW_math = 0; break;
|
|
|
|
|
case 0x10: CW_math = ~CW; break;
|
|
|
|
|
case 0x20: CW_math = CW; break;
|
|
|
|
|
case 0x30: CW_math = 0xff; break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < n_regions; i++)
|
|
|
|
|
{
|
|
|
|
|
if (!(CW_color & (1 << i)))
|
|
|
|
|
drawing_modes[i] |= 1;
|
|
|
|
|
if (!(CW_math & (1 << i)))
|
|
|
|
|
drawing_modes[i] |= 2;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// Store backdrop clip window (draw everywhere color window allows)
|
|
|
|
|
|
|
|
|
|
StoreWindowRegions(0, &IPPU.Clip[0][5], n_regions, windows, drawing_modes, FALSE, TRUE);
|
|
|
|
|
StoreWindowRegions(0, &IPPU.Clip[1][5], n_regions, windows, drawing_modes, TRUE, TRUE);
|
|
|
|
|
|
|
|
|
|
// Store per-BG and OBJ clip windows
|
|
|
|
|
|
|
|
|
|
for (j = 0; j < 5; j++)
|
|
|
|
|
{
|
|
|
|
|
uint8 W = Settings.DisableGraphicWindows ? 0 : CalcWindowMask(j, W1, W2);
|
|
|
|
|
for (int sub = 0; sub < 2; sub++)
|
|
|
|
|
{
|
|
|
|
|
if (Memory.FillRAM[sub + 0x212e] & (1 << j))
|
|
|
|
|
StoreWindowRegions(W, &IPPU.Clip[sub][j], n_regions, windows, drawing_modes, sub);
|
|
|
|
|
else
|
|
|
|
|
StoreWindowRegions(0, &IPPU.Clip[sub][j], n_regions, windows, drawing_modes, sub);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
