path: root/src/dsp1_gp32.h

/*
 * Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
 *
 * (c) Copyright 1996 - 2001 Gary Henderson (gary.henderson@ntlworld.com) and
 *                           Jerremy Koot (jkoot@snes9x.com)
 *
 * Super FX C emulator code
 * (c) Copyright 1997 - 1999 Ivar (ivar@snes9x.com) and
 *                           Gary Henderson.
 * Super FX assembler emulator code (c) Copyright 1998 zsKnight and _Demo_.
 *
 * DSP1 emulator code (c) Copyright 1998 Ivar, _Demo_ and Gary Henderson.
 * C4 asm and some C emulation code (c) Copyright 2000 zsKnight and _Demo_.
 * C4 C code (c) Copyright 2001 Gary Henderson (gary.henderson@ntlworld.com).
 *
 * DOS port code 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 _DSP1_H_
#define _DSP1_H_

// Simple vector and matrix types
typedef double MATRIX[3][3];
typedef double VECTOR[3];

enum AttitudeMatrix { MatrixA, MatrixB, MatrixC };

struct SDSP1
{
   bool8 waiting4command;
   bool8 first_parameter;
   uint8 command;
   uint32 in_count;
   uint32 in_index;
   uint32 out_count;
   uint32 out_index;
   uint16 parameters [10];
   uint16 output [10];

   // Attitude matrices
   MATRIX vMa;
   MATRIX vMb;
   MATRIX vMc;

   // Matrix and translaton vector for
   // transforming a 3D position into the global coordinate system,
   // from the view space coordinate system.
   MATRIX vM;
   VECTOR vT;

   // Focal distance
   double vFov;

   // A precalculated value for optimization
   double vPlaneD;

   // Raster position of horizon
   double vHorizon;

   // Convert a 2D screen coordinate to a 3D ground coordinate in global coordinate system.
   void ScreenToGround(VECTOR &v, double X2d, double Y2d);

   MATRIX &GetMatrix(AttitudeMatrix Matrix);
};

///////////////// DSP Commands ////////////////////

// DSP1 Command 02h
struct DSP1_Parameter
{
   DSP1_Parameter(int16 Fx, int16 Fy, int16 Fz,
                  uint16 Lfe, uint16 Les,
                  int8 Aas, int8 Azs);

   // Raster number of imaginary center
   int16 Vof; // -32768 ~ +32767

   // Raster number representing
   // horizontal line.
   int16 Vva; // -32768 ~ +32767

   // X,Y coordinate of the point
   // projected on the center of the screen
   // (ground coordinate)
   int16 Cx;  // -32768 ~ +32767
   int16 Cy;  // -32768 ~ +32767
};

// DSP1 Command 0Ah
struct DSP1_Raster
{
   DSP1_Raster(int16 Vs);

   // Linear transformation matrix elements
   // for each raster
   int16 An;
   int16 Bn;
   int16 Cn;
   int16 Dn;
};

// DSP1 Command 06h
struct DSP1_Project
{
   DSP1_Project(int16 x, int16 y, int16 z);

   int16 H;
   int16 V;
   int16 M;
};

// DSP1 Command 0Eh
struct DSP1_Target
{
   DSP1_Target(int16 h, int16 v);

   int16 X;
   int16 Y;
};

// DSP1 Command 04h
struct DSP1_Triangle
{
   DSP1_Triangle(int16 Theta, int16 r);
   int16 S;
   int16 C;
};

// DSP1 Command 08h
struct DSP1_Radius
{
   DSP1_Radius(int16 x, int16 y, int16 z);
   int16 Ll;
   int16 Lh;
};

// DSP1 Command 18h
int16 DSP1_Range(int16 x, int16 y, int16 z, int16 r);

// DSP1 Command 28h
int16 DSP1_Distance(int16 x, int16 y, int16 z);

// DSP1 Command 0Ch
struct DSP1_Rotate
{
   DSP1_Rotate(int16 A, int16 x1, int16 y1);

   int16 x2;
   int16 y2;
};

// DSP1 Command 1Ch
struct DSP1_Polar
{
   DSP1_Polar(int8 Za, int8 Xa, int8 Ya, int16 x, int16 y, int16 z);

   int16 X;
   int16 Y;
   int16 Z;
};

// DSP1 Command 01h, 11h and 21h
void DSP1_Attitude(int16 m, int8 Za, int8 Xa, int8 Ya, AttitudeMatrix Matrix);

// DSP1 Command 0Dh, 1Dh and 2Dh
struct DSP1_Objective
{
   DSP1_Objective(int16 x, int16 y, int16 z, AttitudeMatrix Matrix);

   int16 F;
   int16 L;
   int16 U;
};

// DSP1 Command 03h, 13h and 23h
struct DSP1_Subjective
{
   DSP1_Subjective(int16 F, int16 L, int16 U, AttitudeMatrix Matrix);

   int16 X;
   int16 Y;
   int16 Z;
};

// DSP1 Command 0Bh, 1Bh and 2Bh
int16 DSP1_Scalar(int16 x, int16 y, int16 z, AttitudeMatrix Matrix);

// DSP1 Command 14h
struct DSP1_Gyrate
{
   DSP1_Gyrate(int8 Zi, int8 Xi, int8 Yi,
               int8 dU, int8 dF, int8 dL);

   int8 Z0;
   int8 X0;
   int8 Y0;
};

// DSP1 Command 00h
int16 DSP1_Multiply(int16 k, int16 I);

// DSP1 Command 10h
struct DSP1_Inverse
{
   DSP1_Inverse(int16 a, int16 b);

   int16 A;
   int16 B;
};

void S9xResetDSP1(void);
uint8 S9xGetDSP(uint16 Address);
void S9xSetDSP(uint8 Byte, uint16 Address);

#ifndef __GP32__
extern struct SDSP1 DSP1;
#else
extern struct SDSP1 DSP1;
#endif

#endif