mirror of
https://github.com/libretro/snes9x.git
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430 lines
11 KiB
C++
430 lines
11 KiB
C++
/***********************************************************************************
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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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zones (kasumitokoduck@yahoo.com)
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(c) Copyright 2006 - 2007 nitsuja
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(c) Copyright 2009 - 2010 BearOso,
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OV2
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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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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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(c) Copyright 2004 - 2010 BearOso
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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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(c) Copyright 2009 - 2010 OV2
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Mac OS GUI code
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(c) Copyright 1998 - 2001 John Stiles
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(c) Copyright 2001 - 2010 zones
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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 "epx.h"
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void EPX_16 (uint8 *srcPtr, int srcRowBytes, uint8 *dstPtr, int dstRowBytes, int width, int height)
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{
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uint16 colorX, colorA, colorB, colorC, colorD;
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uint16 *sP, *uP, *lP;
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uint32 *dP1, *dP2;
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int w;
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height -= 2;
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// D
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// A X C
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// B
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// top edge
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sP = (uint16 *) srcPtr;
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lP = (uint16 *) (srcPtr + srcRowBytes);
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dP1 = (uint32 *) dstPtr;
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dP2 = (uint32 *) (dstPtr + dstRowBytes);
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// left edge
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colorX = *sP;
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colorC = *++sP;
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colorB = *lP++;
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if ((colorX != colorC) && (colorB != colorX))
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{
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#ifdef MSB_FIRST
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*dP1 = (colorX << 16) + colorX;
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*dP2 = (colorX << 16) + ((colorB == colorC) ? colorB : colorX);
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#else
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*dP1 = colorX + (colorX << 16);
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*dP2 = colorX + (((colorB == colorC) ? colorB : colorX) << 16);
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#endif
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}
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else
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*dP1 = *dP2 = (colorX << 16) + colorX;
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dP1++;
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dP2++;
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//
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for (w = width - 2; w; w--)
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{
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colorA = colorX;
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colorX = colorC;
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colorC = *++sP;
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colorB = *lP++;
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if ((colorA != colorC) && (colorB != colorX))
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{
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#ifdef MSB_FIRST
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*dP1 = (colorX << 16) + colorX;
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*dP2 = (((colorA == colorB) ? colorA : colorX) << 16) + ((colorB == colorC) ? colorB : colorX);
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#else
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*dP1 = colorX + (colorX << 16);
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*dP2 = ((colorA == colorB) ? colorA : colorX) + (((colorB == colorC) ? colorB : colorX) << 16);
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#endif
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}
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else
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*dP1 = *dP2 = (colorX << 16) + colorX;
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dP1++;
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dP2++;
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}
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// right edge
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colorA = colorX;
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colorX = colorC;
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colorB = *lP;
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if ((colorA != colorX) && (colorB != colorX))
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{
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#ifdef MSB_FIRST
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*dP1 = (colorX << 16) + colorX;
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*dP2 = (((colorA == colorB) ? colorA : colorX) << 16) + colorX;
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#else
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*dP1 = colorX + (colorX << 16);
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*dP2 = ((colorA == colorB) ? colorA : colorX) + (colorX << 16);
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#endif
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}
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else
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*dP1 = *dP2 = (colorX << 16) + colorX;
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srcPtr += srcRowBytes;
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dstPtr += dstRowBytes << 1;
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//
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for (; height; height--)
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{
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sP = (uint16 *) srcPtr;
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uP = (uint16 *) (srcPtr - srcRowBytes);
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lP = (uint16 *) (srcPtr + srcRowBytes);
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dP1 = (uint32 *) dstPtr;
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dP2 = (uint32 *) (dstPtr + dstRowBytes);
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// left edge
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colorX = *sP;
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colorC = *++sP;
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colorB = *lP++;
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colorD = *uP++;
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if ((colorX != colorC) && (colorB != colorD))
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{
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#ifdef MSB_FIRST
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*dP1 = (colorX << 16) + ((colorC == colorD) ? colorC : colorX);
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*dP2 = (colorX << 16) + ((colorB == colorC) ? colorB : colorX);
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#else
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*dP1 = colorX + (((colorC == colorD) ? colorC : colorX) << 16);
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*dP2 = colorX + (((colorB == colorC) ? colorB : colorX) << 16);
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#endif
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}
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else
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*dP1 = *dP2 = (colorX << 16) + colorX;
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dP1++;
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dP2++;
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//
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for (w = width - 2; w; w--)
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{
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colorA = colorX;
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colorX = colorC;
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colorC = *++sP;
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colorB = *lP++;
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colorD = *uP++;
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if ((colorA != colorC) && (colorB != colorD))
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{
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#ifdef MSB_FIRST
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*dP1 = (((colorD == colorA) ? colorD : colorX) << 16) + ((colorC == colorD) ? colorC : colorX);
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*dP2 = (((colorA == colorB) ? colorA : colorX) << 16) + ((colorB == colorC) ? colorB : colorX);
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#else
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*dP1 = ((colorD == colorA) ? colorD : colorX) + (((colorC == colorD) ? colorC : colorX) << 16);
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*dP2 = ((colorA == colorB) ? colorA : colorX) + (((colorB == colorC) ? colorB : colorX) << 16);
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#endif
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}
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else
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*dP1 = *dP2 = (colorX << 16) + colorX;
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dP1++;
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dP2++;
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}
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// right edge
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colorA = colorX;
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colorX = colorC;
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colorB = *lP;
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colorD = *uP;
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if ((colorA != colorX) && (colorB != colorD))
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{
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#ifdef MSB_FIRST
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*dP1 = (((colorD == colorA) ? colorD : colorX) << 16) + colorX;
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*dP2 = (((colorA == colorB) ? colorA : colorX) << 16) + colorX;
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#else
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*dP1 = ((colorD == colorA) ? colorD : colorX) + (colorX << 16);
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*dP2 = ((colorA == colorB) ? colorA : colorX) + (colorX << 16);
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#endif
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}
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else
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*dP1 = *dP2 = (colorX << 16) + colorX;
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srcPtr += srcRowBytes;
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dstPtr += dstRowBytes << 1;
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}
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// bottom edge
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sP = (uint16 *) srcPtr;
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uP = (uint16 *) (srcPtr - srcRowBytes);
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dP1 = (uint32 *) dstPtr;
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dP2 = (uint32 *) (dstPtr + dstRowBytes);
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// left edge
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colorX = *sP;
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colorC = *++sP;
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colorD = *uP++;
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if ((colorX != colorC) && (colorX != colorD))
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{
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#ifdef MSB_FIRST
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*dP1 = (colorX << 16) + ((colorC == colorD) ? colorC : colorX);
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*dP2 = (colorX << 16) + colorX;
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#else
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*dP1 = colorX + (((colorC == colorD) ? colorC : colorX) << 16);
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*dP2 = colorX + (colorX << 16);
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#endif
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}
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else
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*dP1 = *dP2 = (colorX << 16) + colorX;
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dP1++;
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dP2++;
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//
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for (w = width - 2; w; w--)
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{
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colorA = colorX;
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colorX = colorC;
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colorC = *++sP;
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colorD = *uP++;
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if ((colorA != colorC) && (colorX != colorD))
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{
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#ifdef MSB_FIRST
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*dP1 = (((colorD == colorA) ? colorD : colorX) << 16) + ((colorC == colorD) ? colorC : colorX);
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*dP2 = (colorX << 16) + colorX;
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#else
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*dP1 = ((colorD == colorA) ? colorD : colorX) + (((colorC == colorD) ? colorC : colorX) << 16);
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*dP2 = colorX + (colorX << 16);
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#endif
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}
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else
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*dP1 = *dP2 = (colorX << 16) + colorX;
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dP1++;
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dP2++;
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}
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// right edge
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colorA = colorX;
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colorX = colorC;
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colorD = *uP;
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if ((colorA != colorX) && (colorX != colorD))
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{
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#ifdef MSB_FIRST
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*dP1 = (((colorD == colorA) ? colorD : colorX) << 16) + colorX;
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*dP2 = (colorX << 16) + colorX;
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#else
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*dP1 = ((colorD == colorA) ? colorD : colorX) + (colorX << 16);
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*dP2 = colorX + (colorX << 16);
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#endif
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}
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else
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*dP1 = *dP2 = (colorX << 16) + colorX;
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}
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