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c4emu.c
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/***********************************************************************************
Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
(c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com),
Jerremy Koot (jkoot@snes9x.com)
(c) Copyright 2002 - 2004 Matthew Kendora
(c) Copyright 2002 - 2005 Peter Bortas (peter@bortas.org)
(c) Copyright 2004 - 2005 Joel Yliluoma (http://iki.fi/bisqwit/)
(c) Copyright 2001 - 2006 John Weidman (jweidman@slip.net)
(c) Copyright 2002 - 2006 funkyass (funkyass@spam.shaw.ca),
Kris Bleakley (codeviolation@hotmail.com)
(c) Copyright 2002 - 2010 Brad Jorsch (anomie@users.sourceforge.net),
Nach (n-a-c-h@users.sourceforge.net),
zones (kasumitokoduck@yahoo.com)
(c) Copyright 2006 - 2007 nitsuja
(c) Copyright 2009 - 2010 BearOso,
OV2
BS-X C emulator code
(c) Copyright 2005 - 2006 Dreamer Nom,
zones
C4 x86 assembler and some C emulation code
(c) Copyright 2000 - 2003 _Demo_ (_demo_@zsnes.com),
Nach,
zsKnight (zsknight@zsnes.com)
C4 C++ code
(c) Copyright 2003 - 2006 Brad Jorsch,
Nach
DSP-1 emulator code
(c) Copyright 1998 - 2006 _Demo_,
Andreas Naive (andreasnaive@gmail.com),
Gary Henderson,
Ivar (ivar@snes9x.com),
John Weidman,
Kris Bleakley,
Matthew Kendora,
Nach,
neviksti (neviksti@hotmail.com)
DSP-2 emulator code
(c) Copyright 2003 John Weidman,
Kris Bleakley,
Lord Nightmare (lord_nightmare@users.sourceforge.net),
Matthew Kendora,
neviksti
DSP-3 emulator code
(c) Copyright 2003 - 2006 John Weidman,
Kris Bleakley,
Lancer,
z80 gaiden
DSP-4 emulator code
(c) Copyright 2004 - 2006 Dreamer Nom,
John Weidman,
Kris Bleakley,
Nach,
z80 gaiden
OBC1 emulator code
(c) Copyright 2001 - 2004 zsKnight,
pagefault (pagefault@zsnes.com),
Kris Bleakley
Ported from x86 assembler to C by sanmaiwashi
SPC7110 and RTC C++ emulator code used in 1.39-1.51
(c) Copyright 2002 Matthew Kendora with research by
zsKnight,
John Weidman,
Dark Force
SPC7110 and RTC C++ emulator code used in 1.52+
(c) Copyright 2009 byuu,
neviksti
S-DD1 C emulator code
(c) Copyright 2003 Brad Jorsch with research by
Andreas Naive,
John Weidman
S-RTC C emulator code
(c) Copyright 2001 - 2006 byuu,
John Weidman
ST010 C++ emulator code
(c) Copyright 2003 Feather,
John Weidman,
Kris Bleakley,
Matthew Kendora
Super FX x86 assembler emulator code
(c) Copyright 1998 - 2003 _Demo_,
pagefault,
zsKnight
Super FX C emulator code
(c) Copyright 1997 - 1999 Ivar,
Gary Henderson,
John Weidman
Sound emulator code used in 1.5-1.51
(c) Copyright 1998 - 2003 Brad Martin
(c) Copyright 1998 - 2006 Charles Bilyue'
Sound emulator code used in 1.52+
(c) Copyright 2004 - 2007 Shay Green (gblargg@gmail.com)
SH assembler code partly based on x86 assembler code
(c) Copyright 2002 - 2004 Marcus Comstedt (marcus@mc.pp.se)
2xSaI filter
(c) Copyright 1999 - 2001 Derek Liauw Kie Fa
HQ2x, HQ3x, HQ4x filters
(c) Copyright 2003 Maxim Stepin (maxim@hiend3d.com)
NTSC filter
(c) Copyright 2006 - 2007 Shay Green
GTK+ GUI code
(c) Copyright 2004 - 2010 BearOso
Win32 GUI code
(c) Copyright 2003 - 2006 blip,
funkyass,
Matthew Kendora,
Nach,
nitsuja
(c) Copyright 2009 - 2010 OV2
Mac OS GUI code
(c) Copyright 1998 - 2001 John Stiles
(c) Copyright 2001 - 2010 zones
(c) Copyright 2010 - 2016 Daniel De Matteis. (UNDER NO CIRCUMSTANCE
WILL COMMERCIAL RIGHTS EVER BE APPROPRIATED TO ANY PARTY)
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/or 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 or it's derivatives.
Snes9x is freeware for PERSONAL USE only. Commercial users should
seek permission of the copyright holders first. Commercial use includes,
but is not limited to, charging money for Snes9x or software derived from
Snes9x, including Snes9x or derivatives in commercial game bundles, and/or
using Snes9x as a promotion for your commercial product.
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.
***********************************************************************************/
#include <string.h>
#include <stdlib.h>
#include <math.h>
#include <retro_inline.h>
#include "snes9x.h"
#include "memmap.h"
#ifdef RIGHTSHIFT_IS_SAR
#ifndef SAR
#define SAR(b, n) ((b) >> (n))
#endif
#else
static INLINE int8 SAR (const int8 b, const int n)
{
#ifndef RIGHTSHIFT_int8_IS_SAR
if (b < 0)
return ((b >> n) | (-1 << (8 - n)));
#endif
return (b >> n);
}
static INLINE int16 SAR (const int16 b, const int n)
{
#ifndef RIGHTSHIFT_int16_IS_SAR
if (b < 0)
return ((b >> n) | (-1 << (16 - n)));
#endif
return (b >> n);
}
static INLINE int32 SAR (const int32 b, const int n)
{
#ifndef RIGHTSHIFT_int32_IS_SAR
if (b < 0)
return ((b >> n) | (-1 << (32 - n)));
#endif
return (b >> n);
}
static INLINE int64 SAR (const int64 b, const int n)
{
#ifndef RIGHTSHIFT_int64_IS_SAR
if (b < 0)
return ((b >> n) | (-1 << (64 - n)));
#endif
return (b >> n);
}
#endif
#define C4_PI 3.14159265
static int16 C4WFXVal;
static int16 C4WFYVal;
static int16 C4WFZVal;
static int16 C4WFX2Val;
static int16 C4WFY2Val;
static int16 C4WFDist;
static int16 C4WFScale;
static int16 C41FXVal;
static int16 C41FYVal;
static int16 C41FAngleRes;
static int16 C41FDist;
static int16 C41FDistVal;
static double tanval;
static double c4x, c4y, c4z;
static double c4x2, c4y2, c4z2;
static int16 C4SinTable[512] =
{
0, 402, 804, 1206, 1607, 2009, 2410, 2811,
3211, 3611, 4011, 4409, 4808, 5205, 5602, 5997,
6392, 6786, 7179, 7571, 7961, 8351, 8739, 9126,
9512, 9896, 10278, 10659, 11039, 11416, 11793, 12167,
12539, 12910, 13278, 13645, 14010, 14372, 14732, 15090,
15446, 15800, 16151, 16499, 16846, 17189, 17530, 17869,
18204, 18537, 18868, 19195, 19519, 19841, 20159, 20475,
20787, 21097, 21403, 21706, 22005, 22301, 22594, 22884,
23170, 23453, 23732, 24007, 24279, 24547, 24812, 25073,
25330, 25583, 25832, 26077, 26319, 26557, 26790, 27020,
27245, 27466, 27684, 27897, 28106, 28310, 28511, 28707,
28898, 29086, 29269, 29447, 29621, 29791, 29956, 30117,
30273, 30425, 30572, 30714, 30852, 30985, 31114, 31237,
31357, 31471, 31581, 31685, 31785, 31881, 31971, 32057,
32138, 32214, 32285, 32351, 32413, 32469, 32521, 32568,
32610, 32647, 32679, 32706, 32728, 32745, 32758, 32765,
32767, 32765, 32758, 32745, 32728, 32706, 32679, 32647,
32610, 32568, 32521, 32469, 32413, 32351, 32285, 32214,
32138, 32057, 31971, 31881, 31785, 31685, 31581, 31471,
31357, 31237, 31114, 30985, 30852, 30714, 30572, 30425,
30273, 30117, 29956, 29791, 29621, 29447, 29269, 29086,
28898, 28707, 28511, 28310, 28106, 27897, 27684, 27466,
27245, 27020, 26790, 26557, 26319, 26077, 25832, 25583,
25330, 25073, 24812, 24547, 24279, 24007, 23732, 23453,
23170, 22884, 22594, 22301, 22005, 21706, 21403, 21097,
20787, 20475, 20159, 19841, 19519, 19195, 18868, 18537,
18204, 17869, 17530, 17189, 16846, 16499, 16151, 15800,
15446, 15090, 14732, 14372, 14010, 13645, 13278, 12910,
12539, 12167, 11793, 11416, 11039, 10659, 10278, 9896,
9512, 9126, 8739, 8351, 7961, 7571, 7179, 6786,
6392, 5997, 5602, 5205, 4808, 4409, 4011, 3611,
3211, 2811, 2410, 2009, 1607, 1206, 804, 402,
0, -402, -804, -1206, -1607, -2009, -2410, -2811,
-3211, -3611, -4011, -4409, -4808, -5205, -5602, -5997,
-6392, -6786, -7179, -7571, -7961, -8351, -8739, -9126,
-9512, -9896, -10278, -10659, -11039, -11416, -11793, -12167,
-12539, -12910, -13278, -13645, -14010, -14372, -14732, -15090,
-15446, -15800, -16151, -16499, -16846, -17189, -17530, -17869,
-18204, -18537, -18868, -19195, -19519, -19841, -20159, -20475,
-20787, -21097, -21403, -21706, -22005, -22301, -22594, -22884,
-23170, -23453, -23732, -24007, -24279, -24547, -24812, -25073,
-25330, -25583, -25832, -26077, -26319, -26557, -26790, -27020,
-27245, -27466, -27684, -27897, -28106, -28310, -28511, -28707,
-28898, -29086, -29269, -29447, -29621, -29791, -29956, -30117,
-30273, -30425, -30572, -30714, -30852, -30985, -31114, -31237,
-31357, -31471, -31581, -31685, -31785, -31881, -31971, -32057,
-32138, -32214, -32285, -32351, -32413, -32469, -32521, -32568,
-32610, -32647, -32679, -32706, -32728, -32745, -32758, -32765,
-32767, -32765, -32758, -32745, -32728, -32706, -32679, -32647,
-32610, -32568, -32521, -32469, -32413, -32351, -32285, -32214,
-32138, -32057, -31971, -31881, -31785, -31685, -31581, -31471,
-31357, -31237, -31114, -30985, -30852, -30714, -30572, -30425,
-30273, -30117, -29956, -29791, -29621, -29447, -29269, -29086,
-28898, -28707, -28511, -28310, -28106, -27897, -27684, -27466,
-27245, -27020, -26790, -26557, -26319, -26077, -25832, -25583,
-25330, -25073, -24812, -24547, -24279, -24007, -23732, -23453,
-23170, -22884, -22594, -22301, -22005, -21706, -21403, -21097,
-20787, -20475, -20159, -19841, -19519, -19195, -18868, -18537,
-18204, -17869, -17530, -17189, -16846, -16499, -16151, -15800,
-15446, -15090, -14732, -14372, -14010, -13645, -13278, -12910,
-12539, -12167, -11793, -11416, -11039, -10659, -10278, -9896,
-9512, -9126, -8739, -8351, -7961, -7571, -7179, -6786,
-6392, -5997, -5602, -5205, -4808, -4409, -4011, -3611,
-3211, -2811, -2410, -2009, -1607, -1206, -804, -402
};
static int16 C4CosTable[512] =
{
32767, 32765, 32758, 32745, 32728, 32706, 32679, 32647,
32610, 32568, 32521, 32469, 32413, 32351, 32285, 32214,
32138, 32057, 31971, 31881, 31785, 31685, 31581, 31471,
31357, 31237, 31114, 30985, 30852, 30714, 30572, 30425,
30273, 30117, 29956, 29791, 29621, 29447, 29269, 29086,
28898, 28707, 28511, 28310, 28106, 27897, 27684, 27466,
27245, 27020, 26790, 26557, 26319, 26077, 25832, 25583,
25330, 25073, 24812, 24547, 24279, 24007, 23732, 23453,
23170, 22884, 22594, 22301, 22005, 21706, 21403, 21097,
20787, 20475, 20159, 19841, 19519, 19195, 18868, 18537,
18204, 17869, 17530, 17189, 16846, 16499, 16151, 15800,
15446, 15090, 14732, 14372, 14010, 13645, 13278, 12910,
12539, 12167, 11793, 11416, 11039, 10659, 10278, 9896,
9512, 9126, 8739, 8351, 7961, 7571, 7179, 6786,
6392, 5997, 5602, 5205, 4808, 4409, 4011, 3611,
3211, 2811, 2410, 2009, 1607, 1206, 804, 402,
0, -402, -804, -1206, -1607, -2009, -2410, -2811,
-3211, -3611, -4011, -4409, -4808, -5205, -5602, -5997,
-6392, -6786, -7179, -7571, -7961, -8351, -8739, -9126,
-9512, -9896, -10278, -10659, -11039, -11416, -11793, -12167,
-12539, -12910, -13278, -13645, -14010, -14372, -14732, -15090,
-15446, -15800, -16151, -16499, -16846, -17189, -17530, -17869,
-18204, -18537, -18868, -19195, -19519, -19841, -20159, -20475,
-20787, -21097, -21403, -21706, -22005, -22301, -22594, -22884,
-23170, -23453, -23732, -24007, -24279, -24547, -24812, -25073,
-25330, -25583, -25832, -26077, -26319, -26557, -26790, -27020,
-27245, -27466, -27684, -27897, -28106, -28310, -28511, -28707,
-28898, -29086, -29269, -29447, -29621, -29791, -29956, -30117,
-30273, -30425, -30572, -30714, -30852, -30985, -31114, -31237,
-31357, -31471, -31581, -31685, -31785, -31881, -31971, -32057,
-32138, -32214, -32285, -32351, -32413, -32469, -32521, -32568,
-32610, -32647, -32679, -32706, -32728, -32745, -32758, -32765,
-32767, -32765, -32758, -32745, -32728, -32706, -32679, -32647,
-32610, -32568, -32521, -32469, -32413, -32351, -32285, -32214,
-32138, -32057, -31971, -31881, -31785, -31685, -31581, -31471,
-31357, -31237, -31114, -30985, -30852, -30714, -30572, -30425,
-30273, -30117, -29956, -29791, -29621, -29447, -29269, -29086,
-28898, -28707, -28511, -28310, -28106, -27897, -27684, -27466,
-27245, -27020, -26790, -26557, -26319, -26077, -25832, -25583,
-25330, -25073, -24812, -24547, -24279, -24007, -23732, -23453,
-23170, -22884, -22594, -22301, -22005, -21706, -21403, -21097,
-20787, -20475, -20159, -19841, -19519, -19195, -18868, -18537,
-18204, -17869, -17530, -17189, -16846, -16499, -16151, -15800,
-15446, -15090, -14732, -14372, -14010, -13645, -13278, -12910,
-12539, -12167, -11793, -11416, -11039, -10659, -10278, -9896,
-9512, -9126, -8739, -8351, -7961, -7571, -7179, -6786,
-6392, -5997, -5602, -5205, -4808, -4409, -4011, -3611,
-3211, -2811, -2410, -2009, -1607, -1206, -804, -402,
0, 402, 804, 1206, 1607, 2009, 2410, 2811,
3211, 3611, 4011, 4409, 4808, 5205, 5602, 5997,
6392, 6786, 7179, 7571, 7961, 8351, 8739, 9126,
9512, 9896, 10278, 10659, 11039, 11416, 11793, 12167,
12539, 12910, 13278, 13645, 14010, 14372, 14732, 15090,
15446, 15800, 16151, 16499, 16846, 17189, 17530, 17869,
18204, 18537, 18868, 19195, 19519, 19841, 20159, 20475,
20787, 21097, 21403, 21706, 22005, 22301, 22594, 22884,
23170, 23453, 23732, 24007, 24279, 24547, 24812, 25073,
25330, 25583, 25832, 26077, 26319, 26557, 26790, 27020,
27245, 27466, 27684, 27897, 28106, 28310, 28511, 28707,
28898, 29086, 29269, 29447, 29621, 29791, 29956, 30117,
30273, 30425, 30572, 30714, 30852, 30985, 31114, 31237,
31357, 31471, 31581, 31685, 31785, 31881, 31971, 32057,
32138, 32214, 32285, 32351, 32413, 32469, 32521, 32568,
32610, 32647, 32679, 32706, 32728, 32745, 32758, 32765
};
static uint8 C4TestPattern[12 * 4] =
{
0x00, 0x00, 0x00, 0xff,
0xff, 0xff, 0x00, 0xff,
0x00, 0x00, 0x00, 0xff,
0xff, 0xff, 0x00, 0x00,
0xff, 0xff, 0x00, 0x00,
0x80, 0xff, 0xff, 0x7f,
0x00, 0x80, 0x00, 0xff,
0x7f, 0x00, 0xff, 0x7f,
0xff, 0x7f, 0xff, 0xff,
0x00, 0x00, 0x01, 0xff,
0xff, 0xfe, 0x00, 0x01,
0x00, 0xff, 0xfe, 0x00
};
static INLINE uint8 * C4GetMemPointer (uint32 Address)
{
return (Memory.ROM + ((Address & 0xff0000) >> 1) + (Address & 0x7fff));
}
static void C4ConvOAM (void)
{
uint8 *i, *OAMptr, *OAMptr2, *srcptr, *sprptr;
uint8 SprName, SprAttr, SprCount, offset;
int16 SprX, SprY;
uint16 globalX, globalY;
int j;
OAMptr = Memory.C4RAM + (Memory.C4RAM[0x626] << 2);
for (i = Memory.C4RAM + 0x1fd; i > OAMptr; i -= 4)
*i = 0xe0; /* Clear OAM-to-be */
globalX = READ_WORD(Memory.C4RAM + 0x0621);
globalY = READ_WORD(Memory.C4RAM + 0x0623);
OAMptr2 = Memory.C4RAM + 0x200 + (Memory.C4RAM[0x626] >> 2);
if (Memory.C4RAM[0x0620] != 0)
{
SprCount = 128 - Memory.C4RAM[0x626];
offset = (Memory.C4RAM[0x626] & 3) * 2;
srcptr = Memory.C4RAM + 0x220;
for ( j = Memory.C4RAM[0x0620]; j > 0 && SprCount > 0; j--, srcptr += 16)
{
SprX = READ_WORD(srcptr) - globalX;
SprY = READ_WORD(srcptr + 2) - globalY;
SprName = srcptr[5];
SprAttr = srcptr[4] | srcptr[0x06]; /* XXX: mask bits? */
sprptr = C4GetMemPointer(READ_3WORD(srcptr + 7));
if (*sprptr != 0)
{
int16 X, Y;
int SprCnt;
for ( SprCnt = *sprptr++; SprCnt > 0 && SprCount > 0; SprCnt--, sprptr += 4)
{
X = (int8) sprptr[1];
if (SprAttr & 0x40)
X = -X - ((sprptr[0] & 0x20) ? 16 : 8); /* flip X */
X += SprX;
if (X >= -16 && X <= 272)
{
Y = (int8) sprptr[2];
if (SprAttr & 0x80)
Y = -Y - ((sprptr[0] & 0x20) ? 16 : 8);
Y += SprY;
if (Y >= -16 && Y <= 224)
{
OAMptr[0] = X & 0xff;
OAMptr[1] = (uint8) Y;
OAMptr[2] = SprName + sprptr[3];
OAMptr[3] = SprAttr ^ (sprptr[0] & 0xc0); /* XXX: Carry from SprName addition? */
*OAMptr2 &= ~(3 << offset);
if (X & 0x100)
*OAMptr2 |= 1 << offset;
if (sprptr[0] & 0x20)
*OAMptr2 |= 2 << offset;
OAMptr += 4;
SprCount--;
offset = (offset + 2) & 6;
if (offset == 0)
OAMptr2++;
}
}
}
}
else
if (SprCount > 0)
{
/* XXX: Should we be testing -16<=SprX<=272 and -16<=SprY<=224? */
OAMptr[0] = (uint8) SprX;
OAMptr[1] = (uint8) SprY;
OAMptr[2] = SprName;
OAMptr[3] = SprAttr;
*OAMptr2 &= ~(3 << offset);
if (SprX & 0x100)
*OAMptr2 |= 3 << offset;
else
*OAMptr2 |= 2 << offset;
OAMptr += 4;
SprCount--;
offset = (offset + 2) & 6;
if (offset == 0)
OAMptr2++;
}
}
}
}
static void C4DoScaleRotate (int row_padding)
{
uint8 w, h, byte, bit;
int16 A, B, C, D;
int32 XScale, YScale, Cx, Cy, LineX, LineY;
uint32 X, Y;
int x, y, outidx;
/* Calculate matrix */
XScale = READ_WORD(Memory.C4RAM + 0x1f8f);
if (XScale & 0x8000)
XScale = 0x7fff;
YScale = READ_WORD(Memory.C4RAM + 0x1f92);
if (YScale & 0x8000)
YScale = 0x7fff;
if (READ_WORD(Memory.C4RAM + 0x1f80) == 0) /* no rotation */
{
/* XXX: only do this for C and D? */
/* XXX: and then only when YScale is 0x1000? */
A = (int16) XScale;
B = 0;
C = 0;
D = (int16) YScale;
}
else
if (READ_WORD(Memory.C4RAM + 0x1f80) == 128) /* 90 degree rotation */
{
/* XXX: Really do this? */
A = 0;
B = (int16) (-YScale);
C = (int16) XScale;
D = 0;
}
else
if (READ_WORD(Memory.C4RAM + 0x1f80) == 256) /* 180 degree rotation */
{
/* XXX: Really do this? */
A = (int16) (-XScale);
B = 0;
C = 0;
D = (int16) (-YScale);
}
else
if (READ_WORD(Memory.C4RAM + 0x1f80) == 384) /* 270 degree rotation */
{
/* XXX: Really do this? */
A = 0;
B = (int16) YScale;
C = (int16) (-XScale);
D = 0;
}
else
{
A = (int16) SAR(C4CosTable[READ_WORD(Memory.C4RAM + 0x1f80) & 0x1ff] * XScale, 15);
B = (int16) (-SAR(C4SinTable[READ_WORD(Memory.C4RAM + 0x1f80) & 0x1ff] * YScale, 15));
C = (int16) SAR(C4SinTable[READ_WORD(Memory.C4RAM + 0x1f80) & 0x1ff] * XScale, 15);
D = (int16) SAR(C4CosTable[READ_WORD(Memory.C4RAM + 0x1f80) & 0x1ff] * YScale, 15);
}
/* Calculate Pixel Resolution */
w = Memory.C4RAM[0x1f89] & ~7;
h = Memory.C4RAM[0x1f8c] & ~7;
/* Clear the output RAM */
memset(Memory.C4RAM, 0, (w + row_padding / 4) * h / 2);
Cx = (int16) READ_WORD(Memory.C4RAM + 0x1f83);
Cy = (int16) READ_WORD(Memory.C4RAM + 0x1f86);
/* Calculate start position (i.e. (Ox, Oy) = (0, 0))
The low 12 bits are fractional, so (Cx<<12) gives us the Cx we want in the function.
We do Cx*A etc normally because the matrix parameters already have the fractional parts. */
LineX = (Cx << 12) - Cx * A - Cx * B;
LineY = (Cy << 12) - Cy * C - Cy * D;
/* Start loop */
outidx = 0;
bit = 0x80;
for ( y = 0; y < h; y++)
{
X = LineX;
Y = LineY;
for ( x = 0; x < w; x++)
{
if ((X >> 12) >= w || (Y >> 12) >= h)
byte = 0;
else
{
uint32 addr = (Y >> 12) * w + (X >> 12);
byte = Memory.C4RAM[0x600 + (addr >> 1)];
if (addr & 1)
byte >>= 4;
}
/* De-bitplanify */
if (byte & 1)
Memory.C4RAM[outidx] |= bit;
if (byte & 2)
Memory.C4RAM[outidx + 1] |= bit;
if (byte & 4)
Memory.C4RAM[outidx + 16] |= bit;
if (byte & 8)
Memory.C4RAM[outidx + 17] |= bit;
bit >>= 1;
if (bit == 0)
{
bit = 0x80;
outidx += 32;
}
X += A; /* Add 1 to output x => add an A and a C */
Y += C;
}
outidx += 2 + row_padding;
if (outidx & 0x10)
outidx &= ~0x10;
else
outidx -= w * 4 + row_padding;
LineX += B; /* Add 1 to output y => add a B and a D */
LineY += D;
}
}
static void C4CalcWireFrame (void)
{
C4WFXVal = C4WFX2Val - C4WFXVal;
C4WFYVal = C4WFY2Val - C4WFYVal;
if (abs(C4WFXVal) > abs(C4WFYVal))
{
C4WFDist = abs(C4WFXVal) + 1;
C4WFYVal = (int16) (256 * (double) C4WFYVal / abs(C4WFXVal));
if (C4WFXVal < 0)
C4WFXVal = -256;
else
C4WFXVal = 256;
}
else
{
if (C4WFYVal != 0)
{
C4WFDist = abs(C4WFYVal) + 1;
C4WFXVal = (int16) (256 * (double) C4WFXVal / abs(C4WFYVal));
if (C4WFYVal < 0)
C4WFYVal = -256;
else
C4WFYVal = 256;
}
else
C4WFDist = 0;
}
}
static void C4TransfWireFrame2 (void)
{
c4x = (double) C4WFXVal;
c4y = (double) C4WFYVal;
c4z = (double) C4WFZVal;
/* Rotate X */
tanval = -(double) C4WFX2Val * C4_PI * 2 / 128;
c4y2 = c4y * cos(tanval) - c4z * sin(tanval);
c4z2 = c4y * sin(tanval) + c4z * cos(tanval);
/* Rotate Y */
tanval = -(double) C4WFY2Val * C4_PI * 2 / 128;
c4x2 = c4x * cos(tanval) + c4z2 * sin(tanval);
c4z = c4x * -sin(tanval) + c4z2 * cos(tanval);
/* Rotate Z */
tanval = -(double) C4WFDist * C4_PI * 2 / 128;
c4x = c4x2 * cos(tanval) - c4y2 * sin(tanval);
c4y = c4x2 * sin(tanval) + c4y2 * cos(tanval);
/* Scale */
C4WFXVal = (int16) (c4x * (double) C4WFScale / 0x100);
C4WFYVal = (int16) (c4y * (double) C4WFScale / 0x100);
}
static void C4DrawLine (int32 X1, int32 Y1, int16 Z1, int32 X2, int32 Y2, int16 Z2, uint8 Color)
{
int i;
/* Transform coordinates */
C4WFXVal = (int16) X1;
C4WFYVal = (int16) Y1;
C4WFZVal = Z1;
C4WFScale = Memory.C4RAM[0x1f90];
C4WFX2Val = Memory.C4RAM[0x1f86];
C4WFY2Val = Memory.C4RAM[0x1f87];
C4WFDist = Memory.C4RAM[0x1f88];
C4TransfWireFrame2();
X1 = (C4WFXVal + 48) << 8;
Y1 = (C4WFYVal + 48) << 8;
C4WFXVal = (int16) X2;
C4WFYVal = (int16) Y2;
C4WFZVal = Z2;
C4TransfWireFrame2();
X2 = (C4WFXVal + 48) << 8;
Y2 = (C4WFYVal + 48) << 8;
/* Get line info */
C4WFXVal = (int16) (X1 >> 8);
C4WFYVal = (int16) (Y1 >> 8);
C4WFX2Val = (int16) (X2 >> 8);
C4WFY2Val = (int16) (Y2 >> 8);
C4CalcWireFrame();
X2 = (int16) C4WFXVal;
Y2 = (int16) C4WFYVal;
/* Render line */
for ( i = C4WFDist ? C4WFDist : 1; i > 0; i--)
{
if (X1 > 0xff && Y1 > 0xff && X1 < 0x6000 && Y1 < 0x6000)
{
uint16 addr = (((Y1 >> 8) >> 3) << 8) - (((Y1 >> 8) >> 3) << 6) + (((X1 >> 8) >> 3) << 4) + ((Y1 >> 8) & 7) * 2;
uint8 bit = 0x80 >> ((X1 >> 8) & 7);
Memory.C4RAM[addr + 0x300] &= ~bit;
Memory.C4RAM[addr + 0x301] &= ~bit;
if (Color & 1)
Memory.C4RAM[addr + 0x300] |= bit;
if (Color & 2)
Memory.C4RAM[addr + 0x301] |= bit;
}
X1 += X2;
Y1 += Y2;
}
}
static void C4DrawWireFrame (void)
{
uint8 *line = C4GetMemPointer(READ_3WORD(Memory.C4RAM + 0x1f80));
uint8 *point1, *point2;
int16 X1, Y1, Z1;
int16 X2, Y2, Z2;
uint8 Color;
int i;
for ( i = Memory.C4RAM[0x0295]; i > 0; i--, line += 5)
{
if (line[0] == 0xff && line[1] == 0xff)
{
uint8 *tmp = line - 5;
while (tmp[2] == 0xff && tmp[3] == 0xff)
tmp -= 5;
point1 = C4GetMemPointer((Memory.C4RAM[0x1f82] << 16) | (tmp[2] << 8) | tmp[3]);
}
else
point1 = C4GetMemPointer((Memory.C4RAM[0x1f82] << 16) | (line[0] << 8) | line[1]);
point2 = C4GetMemPointer((Memory.C4RAM[0x1f82] << 16) | (line[2] << 8) | line[3]);
X1 = (point1[0] << 8) | point1[1];
Y1 = (point1[2] << 8) | point1[3];
Z1 = (point1[4] << 8) | point1[5];
X2 = (point2[0] << 8) | point2[1];
Y2 = (point2[2] << 8) | point2[3];
Z2 = (point2[4] << 8) | point2[5];
Color = line[4];
C4DrawLine(X1, Y1, Z1, X2, Y2, Z2, Color);
}
}
static void C4TransfWireFrame (void)
{
c4x = (double) C4WFXVal;
c4y = (double) C4WFYVal;
c4z = (double) C4WFZVal - 0x95;
/* Rotate X */
tanval = -(double) C4WFX2Val * C4_PI * 2 / 128;
c4y2 = c4y * cos(tanval) - c4z * sin(tanval);
c4z2 = c4y * sin(tanval) + c4z * cos(tanval);
/* Rotate Y */
tanval = -(double) C4WFY2Val * C4_PI * 2 / 128;
c4x2 = c4x * cos(tanval) + c4z2 * sin(tanval);
c4z = c4x * -sin(tanval) + c4z2 * cos(tanval);
/* Rotate Z */
tanval = -(double) C4WFDist * C4_PI * 2 / 128;
c4x = c4x2 * cos(tanval) - c4y2 * sin(tanval);
c4y = c4x2 * sin(tanval) + c4y2 * cos(tanval);
/* Scale */
C4WFXVal = (int16) (c4x * (double) C4WFScale / (0x90 * (c4z + 0x95)) * 0x95);
C4WFYVal = (int16) (c4y * (double) C4WFScale / (0x90 * (c4z + 0x95)) * 0x95);
}
static void C4TransformLines (void)
{
uint8 *ptr, *ptr2;
int i;
C4WFX2Val = Memory.C4RAM[0x1f83];
C4WFY2Val = Memory.C4RAM[0x1f86];
C4WFDist = Memory.C4RAM[0x1f89];
C4WFScale = Memory.C4RAM[0x1f8c];
/* Transform vertices */
ptr = Memory.C4RAM;
for ( i = READ_WORD(Memory.C4RAM + 0x1f80); i > 0; i--, ptr += 0x10)
{
C4WFXVal = READ_WORD(ptr + 1);
C4WFYVal = READ_WORD(ptr + 5);
C4WFZVal = READ_WORD(ptr + 9);
C4TransfWireFrame();
/* Displace */
WRITE_WORD(ptr + 1, C4WFXVal + 0x80);
WRITE_WORD(ptr + 5, C4WFYVal + 0x50);
}
WRITE_WORD(Memory.C4RAM + 0x600, 23);
WRITE_WORD(Memory.C4RAM + 0x602, 0x60);
WRITE_WORD(Memory.C4RAM + 0x605, 0x40);
WRITE_WORD(Memory.C4RAM + 0x600 + 8, 23);
WRITE_WORD(Memory.C4RAM + 0x602 + 8, 0x60);
WRITE_WORD(Memory.C4RAM + 0x605 + 8, 0x40);
ptr = Memory.C4RAM + 0xb02;
ptr2 = Memory.C4RAM;
for ( i = READ_WORD(Memory.C4RAM + 0xb00); i > 0; i--, ptr += 2, ptr2 += 8)
{
C4WFXVal = READ_WORD(Memory.C4RAM + (ptr[0] << 4) + 1);
C4WFYVal = READ_WORD(Memory.C4RAM + (ptr[0] << 4) + 5);
C4WFX2Val = READ_WORD(Memory.C4RAM + (ptr[1] << 4) + 1);
C4WFY2Val = READ_WORD(Memory.C4RAM + (ptr[1] << 4) + 5);
C4CalcWireFrame();
WRITE_WORD(ptr2 + 0x600, C4WFDist ? C4WFDist : 1);
WRITE_WORD(ptr2 + 0x602, C4WFXVal);
WRITE_WORD(ptr2 + 0x605, C4WFYVal);
}
}
static void C4BitPlaneWave (void)
{
int i, j;
static uint16 bmpdata[] =
{
0x0000, 0x0002, 0x0004, 0x0006, 0x0008, 0x000A, 0x000C, 0x000E,
0x0200, 0x0202, 0x0204, 0x0206, 0x0208, 0x020A, 0x020C, 0x020E,
0x0400, 0x0402, 0x0404, 0x0406, 0x0408, 0x040A, 0x040C, 0x040E,
0x0600, 0x0602, 0x0604, 0x0606, 0x0608, 0x060A, 0x060C, 0x060E,
0x0800, 0x0802, 0x0804, 0x0806, 0x0808, 0x080A, 0x080C, 0x080E
};
uint8 *dst = Memory.C4RAM;
uint32 waveptr = Memory.C4RAM[0x1f83];
uint16 mask1 = 0xc0c0;
uint16 mask2 = 0x3f3f;
for ( j = 0; j < 0x10; j++)
{
do
{
int16 height = -((int8) Memory.C4RAM[waveptr + 0xb00]) - 16;
for ( i = 0; i < 40; i++)
{
uint16 tmp = READ_WORD(dst + bmpdata[i]) & mask2;
if (height >= 0)
{
if (height < 8)
tmp |= mask1 & READ_WORD(Memory.C4RAM + 0xa00 + height * 2);
else
tmp |= mask1 & 0xff00;
}
WRITE_WORD(dst + bmpdata[i], tmp);
height++;
}
waveptr = (waveptr + 1) & 0x7f;
mask1 = (mask1 >> 2) | (mask1 << 6);
mask2 = (mask2 >> 2) | (mask2 << 6);
}
while (mask1 != 0xc0c0);
dst += 16;
do
{
int16 height = -((int8) Memory.C4RAM[waveptr + 0xb00]) - 16;
for ( i = 0; i < 40; i++)
{
uint16 tmp = READ_WORD(dst + bmpdata[i]) & mask2;
if (height >= 0)
{
if (height < 8)
tmp |= mask1 & READ_WORD(Memory.C4RAM + 0xa10 + height * 2);
else
tmp |= mask1 & 0xff00;
}
WRITE_WORD(dst + bmpdata[i], tmp);
height++;
}
waveptr = (waveptr + 1) & 0x7f;
mask1 = (mask1 >> 2) | (mask1 << 6);
mask2 = (mask2 >> 2) | (mask2 << 6);
}
while (mask1 != 0xc0c0);
dst += 16;
}
}
static void C4SprDisintegrate (void)
{
uint8 *src;
uint8 width, height;
uint32 StartX, StartY;
int32 scaleX, scaleY;
int32 Cx, Cy;
uint32 i, j, x, y;
width = Memory.C4RAM[0x1f89];
height = Memory.C4RAM[0x1f8c];
Cx = (int16) READ_WORD(Memory.C4RAM + 0x1f80);
Cy = (int16) READ_WORD(Memory.C4RAM + 0x1f83);
scaleX = (int16) READ_WORD(Memory.C4RAM + 0x1f86);
scaleY = (int16) READ_WORD(Memory.C4RAM + 0x1f8f);
StartX = -Cx * scaleX + (Cx << 8);
StartY = -Cy * scaleY + (Cy << 8);
src = Memory.C4RAM + 0x600;
memset(Memory.C4RAM, 0, width * height / 2);
for ( y = StartY, i = 0; i < height; i++, y += scaleY)
{
for ( x = StartX, j = 0; j < width; j++, x += scaleX)
{
if ((x >> 8) < width && (y >> 8) < height && (y >> 8) * width + (x >> 8) < 0x2000)
{
uint8 pixel = (j & 1) ? (*src >> 4) : *src;
int idx = (y >> 11) * width * 4 + (x >> 11) * 32 + ((y >> 8) & 7) * 2;
uint8 mask = 0x80 >> ((x >> 8) & 7);
if (pixel & 1)
Memory.C4RAM[idx] |= mask;
if (pixel & 2)
Memory.C4RAM[idx + 1] |= mask;
if (pixel & 4)
Memory.C4RAM[idx + 16] |= mask;
if (pixel & 8)
Memory.C4RAM[idx + 17] |= mask;
}
if (j & 1)
src++;
}
}
}
static void C4ProcessSprites (void)
{
switch (Memory.C4RAM[0x1f4d])
{
case 0x00: /* Build OAM */
C4ConvOAM();
break;
case 0x03: /* Scale/Rotate */
C4DoScaleRotate(0);
break;
case 0x05: /* Transform Lines */
C4TransformLines();
break;
case 0x07: /* Scale/Rotate */
C4DoScaleRotate(64);