rpi4-osdev/part12-wgt/wgt.h

#include "include/mb.h"

#define NULL 0
#define rgb(r,g,b) (r<<16)|(g<<8)|b

typedef struct {
    short xres;
    short yres;
    short videomode;
    long  videobanksize;
    short (*bankswitch)(short);
    short screenwidth;
    short screenheight;
} wgt_sys;
extern wgt_sys WGT_SYS;

/* A single palette register definition */
typedef struct
{
    unsigned char r,g,b;
} color;
extern unsigned int vgapal[256];

/* A font definition */
typedef unsigned char * wgtfont;
extern unsigned char vgafont[224][8];

/* Text grid settings */
#define TEXTGRID_OFF 0
#define TEXTGRID_ON 1

/* Text transparency settings */
#define TEXTFG 0
#define TEXTBG 1
#define TEXTFGBG 2

/* Pointer to the active drawing page */
typedef unsigned int *block;
extern block abuf;

/* Current drawing color */
extern unsigned int currentcolor;

/* Clipping boundaries */
extern short bx,by,tx,ty;

// ######## HELPER FUNCTIONS ########

void *memset(void *dest, int val, unsigned len);
int abs(int i);
int strlen(const char *str);

// ######## WGT FUNCTIONS ########

void vga256(void);
void wsetcolor (unsigned int col);
void wline (short x, short y, short x2, short y2);
void whline (short x1, short x2, short y);
void wcls (unsigned int col);
unsigned int wgetpixel (short x, short y);
void wputpixel (short x, short y);
void wfastputpixel (short x, short y);
void wclip (short x, short y, short x2, short y2);
void wcircle (short x_center, short y_center, short radius);
void wfill_circle (short x_center, short y_center, short radius);
void wrectangle (short x, short y, short x2, short y2);
void wbar (short x, short y, short x2, short y2);
void wbutt (short x, short y, short x2, short y2);
void wsetrgb (unsigned char num, unsigned char red, unsigned char green, unsigned char blue, color *pal);
void wsetpalette (unsigned char start, unsigned char finish, color *pal);
void wreadpalette (unsigned char start, unsigned char finish, color *palc);
void wfline (short x, short y, short x2, short y2);
void wstyleline (short x, short y, short x2, short y2, unsigned short style);
void wellipse (short x_center, short y_center, short x_radius, short y_radius);
void wfill_ellipse (short x_center, short y_center, short x_radius, short y_radius);
void wouttextxy (short x, short y, wgtfont font, char *string);
short woutchar (short asc, short xc, short yc, wgtfont font);
void wtextcolor (unsigned int col);
void wtextbackground (unsigned int col);
void wtexttransparent (short transparent);
void wtextgrid (short onoff);
void wregionfill (short x, short y);