#include "../copyright"

#ifndef _DSP4_H_
#define _DSP4_H_

// op control
int8_t DSP4_Logic; // controls op flow

// projection format
const int16_t PLANE_START = 0x7fff; // starting distance

int16_t view_plane; // viewer location
int16_t far_plane;  // next milestone into screen
int16_t segments;   // # raster segments to draw
int16_t raster;     // current raster line

int16_t project_x; // current x-position
int16_t project_y; // current y-position

int16_t project_centerx; // x-target of projection
int16_t project_centery; // y-target of projection

int16_t project_x1;    // current x-distance
int16_t project_x1low; // lower 16-bits
int16_t project_y1;    // current y-distance
int16_t project_y1low; // lower 16-bits

int16_t project_x2; // next projected x-distance
int16_t project_y2; // next projected y-distance

int16_t project_pitchx;    // delta center
int16_t project_pitchxlow; // lower 16-bits
int16_t project_pitchy;    // delta center
int16_t project_pitchylow; // lower 16-bits

int16_t project_focalx; // x-point of projection at viewer plane
int16_t project_focaly; // y-point of projection at viewer plane

int16_t project_ptr; // data structure pointer

// render window
int16_t center_x;        // x-center of viewport
int16_t center_y;        // y-center of viewport
int16_t viewport_left;   // x-left of viewport
int16_t viewport_right;  // x-right of viewport
int16_t viewport_top;    // y-top of viewport
int16_t viewport_bottom; // y-bottom of viewport

// sprite structure
int16_t sprite_x;      // projected x-pos of sprite
int16_t sprite_y;      // projected y-pos of sprite
int16_t sprite_offset; // data pointer offset
int8_t sprite_type;    // vehicle, terrain
bool sprite_size;      // sprite size: 8x8 or 16x16

// path strips
int16_t path_clipRight[4]; // value to clip to for x>b
int16_t path_clipLeft[4];  // value to clip to for x<a
int16_t path_pos[4];       // x-positions of lanes
int16_t path_ptr[4];       // data structure pointers
int16_t path_raster[4];    // current raster
int16_t path_top[4];       // viewport_top

int16_t path_y[2];     // current y-position
int16_t path_x[2];     // current focals
int16_t path_plane[2]; // previous plane

// op09 window sorting
int16_t multi_index1; // index counter
int16_t multi_index2; // index counter
bool op09_mode;       // window mode

// multi-op storage
int16_t multi_focaly[64];  // focal_y values
int16_t multi_farplane[4]; // farthest drawn distance
int16_t multi_raster[4];   // line where track stops

// OAM
int8_t op06_OAM[32]; // OAM (size,MSB) data
int8_t op06_index;   // index into OAM table
int8_t op06_offset;  // offset into OAM table
#endif