#ifndef _GFX_H_
#define _GFX_H_

#include <stdbool.h>
#include <stdint.h>

enum vga_color_t {
    VGA_BLACK = 0,
    VGA_BLUE = 1,
    VGA_GREEN = 2,
    VGA_CYAN = 3,
    VGA_RED = 4,
    VGA_MAGENTA = 5,
    VGA_BROWN = 6,
    VGA_LIGHT_GRAY = 7,
    VGA_DARK_GRAY = 8,
    VGA_LIGHT_BLUE = 9,
    VGA_LIGHT_GREEN = 10,
    VGA_LIGHT_CYAN = 11,
    VGA_LIGHT_RED = 12,
    VGA_LIGHT_MAGENTA = 13,
    VGA_LIGHT_BROWN = 14,
    VGA_WHITE = 15
};

#define VGA_WIDTH  80
#define VGA_HEIGHT 25

#define VGA_MAKE_COLOR(fg, bg) (fg | bg << 4)
#define VGA_MAKE_ENTRY(ch, col) (((uint16_t)ch)|((uint16_t)col<<8))
#define VGA_RGBPACK(r, g, b)  ((r << 16)|(g << 8)|(b << 0))

#define GFX_WHITE 0xFFFFFF
#define GFX_BLACK 0x000000

struct vbe_info_t;

bool gfx_init(struct vbe_info_t *vbe_mode_info);

extern void (*gfx_drawpixel)(int x, int y);

/* transparent background */
void gfx_drawchar(int x, int y, int ch);

/* fills the background with bgcolor */
void gfx_drawchar_bg(int x, int y, int ch);

void gfx_putchar(int ch);

void gfx_puts(const char* str);

/* this function can be different from resolution to resolution */
extern void (*gfx_clear)(void);

void gfx_reset(void);

void gfx_set_foreground(uint32_t);

uint32_t gfx_get_foreground(void);

void gfx_set_background(uint32_t);

uint32_t gfx_get_background(void);

void (*gfx_hline)(int x1, int x2, int y);

void (*gfx_vline)(int y1, int y2, int x);

void gfx_fillrect(int x1, int y1, int w, int h);

void gfx_drawline(int x1, int y1, int x2, int y2);

/* these circle algorithms are very fast */
void gfx_drawcircle(int cx, int cy, int rad);

void gfx_fillcircle(int cx, int cy, int rad);

void gfx_filltriangle(int x1, int y1, int x2, int y2, int x3, int y3);

extern const uint16_t *gfx_width, *gfx_height;

/* this is _BYTES_ per pixel, NOT BITS per pixel! */
extern const uint8_t *gfx_bpp;

struct bitmap_t {
    unsigned int w, h;
    unsigned int bpp;
    uint8_t *data;
};

void gfx_bitmap(int x, int y, const struct bitmap_t*);

void gfx_drawrect(int x, int y, int w, int h);

void gfx_set_doublebuffer(bool);

bool gfx_get_doublebuffer(void);

/* don't call this wo/ double buffering! */
void gfx_update(void);

void gfx_putsxy(int, int, const char*);

void gfx_putsxy_bg(int, int, const char*);
#endif