/*
 *      Copyright (c) 2024 Scott Duensing, scott@kangaroopunch.com
 *
 *      Permission is hereby granted, free of charge, to any person obtaining a copy
 *      of this software and associated documentation files (the "Software"), to deal
 *      in the Software without restriction, including without limitation the rights
 *      to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *      copies of the Software, and to permit persons to whom the Software is
 *      furnished to do so, subject to the following conditions:
 *
 *      The above copyright notice and this permission notice shall be included in
 *      all copies or substantial portions of the Software.
 *
 *      THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *      IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *      FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *      AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *      LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *      OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 *      SOFTWARE.
 */


#ifdef __F256K__
#include "f256lib.h"
#else
#include <stdint.h>
#include <stdbool.h>
#include "util.h"
#endif


#define A23D2_FAR_BLOCK     42
#define DATABASE_FAR_BLOCK  43

#define DATABASE_FAR        0x56000
#define DRAWLIST_P0_FAR     0x57000
#define DRAWLIST_P1_FAR     0x57800

#define DATABASE            0x8000
#define DRAWLIST_P0         0x9000
#define DRAWLIST_P1         0x9800


// A2-3D2 Function Addresses.
#define A23D2_ENTRYN         0x6090
#define A23D2_NXTPT          0x6118
#define A23D2_SINEX          0x61f6
#define A23D2_COSEX          0x620f

// A2-3D2 Data Addresses.
#define A23D2_TEST_DATABASE  0x80fb
#define A23D2_TDATA          0x613e
#define A23D2_IBP            0x9b

// Stuff A2-3D2 is going to clobber that our compiler may want.
#define COMPILER_ZP_START    0x60  // To 0xC2
#define COMPILER_ZP_LENGTH   0x62
#define A23D2_ZP_START       COMPILER_ZP_START
#define A23D2_ZP_LENGTH      COMPILER_ZP_LENGTH

// Our Scratch Addresses.
#define CAMERA_SHARED_START  0x200 // To 0x209
#define CAMERA_SHARED_LENGTH 0x9
#define SCRATCH_END          0x2ff
#define COMPILER_ZP_SAVE     (CAMERA_SHARED_START + CAMERA_SHARED_LENGTH)
#define A23D2_ZP_SAVE        (COMPILER_ZP_SAVE + COMPILER_ZP_LENGTH)


// A2-3D1 Commands.  Commented out items are Apple ][ only.
#define PNT    0x00 // xLSB, xMSB, yLSB, yMSB, zLSB, zMSB - Define 3D Point
#define SPNT   0x01 // xLSB, xMSB, yLSB, yMSB, zLSB, zMSB - Define 3D Start Point
#define CPNT   0x02 // xLSB, xMSB, yLSB, yMSB, zLSB, zMSB - Define 3D Continue Point
#define RAY    0x03 // xLSB, xMSB, yLSB, yMSB, zLSB, zMSB - Define 3D Ray
#define CLPSW  0x04 // N - Define Clipper (0=off, 1=on)
#define EYE    0x05 // xLSB, xMSB, yLSB, yMSB, zLSB, zMSB, P, B, H - Define 3D Eye/Camera
#define LIN2D  0x06 // X1, Y1, X2, Y2 - Draw 2D Line
//#define DISP   0x07 // N - Display Select (50=set graphics, 51=set text, 52=clear mixed, 53=set mixed, 54=set page 1, 55=set page 2, 56=clear hi-res, 57=set hi-res)
//#define ERAS   0x08 // N - Erase Screen (0=erase page 1, 1=erase page 2, 2=fill page 1, 3=fill page 2)
//#define DRAW   0x09 // N - Select Draw Page (0=page 1, 1=page 2)
#define PNT2D  0x0a // X1, Y1 - Draw 2D Point
#define JMP    0x0b // LSB, MSB - Interpretive Jump
//#define LMODE  0x0c // N - Line Drawing Mode (0=solid, 1=xor)
#define ARRAY  0x0d // LSB, MSB - Enable Output Array
#define SCRSZ  0x0e // WIDTH, HEIGHT, xCENTER, yCENTER - Define Screen Size
#define FIELD  0x0f // xLSB, xMSB, yLSB, yMSB, zLSB, zMSB - Field of View Selection
#define INIT   0x10 // Easy Init
#define NOP    0x11 // No Operation

// A2-3D2 Commands.  Commented out items are Apple ][ only.
#define STCOL  0x12 // COL - Set Color
#define ICALL  0x13 // STAT, LOC, ADDR - Independent Object Call
#define SRES   0x14 // RES - Set Resolution (0=140x192, 1=280x192)
//#define HLIN   0x15 // x1L, x1H, y1, x2L, x2H, y2 - Hi-Res (280x192) Line 2D
//#define SHRB   0x16 // xL, xH, y - Set Hi-Res Bias
//#define HLIN2  0x17 // x1, y1, x2, y2 - Hi-Res (x limited) Line 2D
//#define HPNT   0x18 // xL, xH, y - Hi-Res (280x192) Point 2D
//#define HPNT2  0x19 // x, y - Hi-Res (x limited) Point 2D
#define SKIP   0x1a // SIZE, STATUS - Skip Segment
//#define PAUS   0x1b // TIME - Pause for TIME/5ths of a Second
#define SET323 0x1c // LSB, MSB - Set 3D to 3D Array Address
#define GN323  0x1d // STATUS - Set 3D to 3D Status
#define END    0x79 // End of Database


typedef struct cameraS {  // 9 bytes.
	int16_t x;
	int16_t y;
	int16_t z;
	byte    p;
	byte    b;
	byte    h;
} cameraT;


extern volatile cameraT   *_camera;
extern volatile cameraT   *_cameraInDatabase;
extern volatile byte      *_pointer;

extern uint16_t   _drawlist;
extern uint16_t   _drawlistInDatabase;

extern uint16_t   _bytes;
extern uint8_t    _x1;
extern uint8_t    _y1;
extern uint8_t    _x2;
extern uint8_t    _y2;
extern bool       _useColor;
extern byte       _mmu;
extern byte       _ram;


void a23d2Draw(void);
void a23d2Init(void);
void a23d2Render(void);