#ifndef VGA_H
#define VGA_H

#include <stdbool.h>

#include "string.h"

#include "interrupts.h"
#include "port.h"

#include "driver.h"

#define NOF_MODE_REGS 66

typedef struct {
	int x;
	int y;
	int color_depth;
	uint8_t regs[NOF_MODE_REGS];
	uint8_t *segment;
} vga_mode_t;

typedef struct {
	driver_t base;
	interrupt_t *interrupts;
	port8_t misc_port;
	port8_t crtc_index_port;
	port8_t crtc_data_port;
	port8_t sequencer_index_port;
	port8_t sequencer_data_port;
	port8_t graphics_controller_index_port;
	port8_t graphics_controller_data_port;
	port8_t attribute_controller_index_port;
	port8_t attribute_controller_read_port;
	port8_t attribute_controller_write_port;
	port8_t attribute_controller_reset_port;
	vga_mode_t mode;
	void *context;
} vga_t;

typedef struct {
	driver_vtable_t base;
} vga_vtable_t;

void vga_init( vga_t *vga, void *context );
void vga_activate( void *obj );
void vga_deactivate( void *obj );
void vga_deinit( void *obj );
void vga_print_info( void *obj );

vga_mode_t vga_make_mode( const int x, const int y, const int color_depth );
bool vga_set_mode( vga_t *vga, const vga_mode_t mode );
bool vga_supports_mode( const vga_mode_t mode );

typedef struct {
	int R;
	int G;
	int B;
} vga_color_t;

vga_color_t vga_make_RGB( int R, int G, int B );

void vga_set_pixel( vga_t *vga, const int x, const int y, const vga_color_t color );
void vga_draw_rectangle( vga_t *vga, const int x, const int y, const int w, const int h, const vga_color_t color );

#endif // VGA_H