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/*
* bubbl
* Copyright (C) 2024-2025 Raghuram Subramani <raghus2247@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __drivers_vga_text_buffer_h
#define __drivers_vga_text_buffer_h
/*
* TODO:
* Implement scrolling
*/
#include <stdbool.h>
#include <stdint.h>
#define VGA_WIDTH 80
#define VGA_HEIGHT 25
/* Hardware text mode color constants. */
typedef enum {
VGA_COLOR_BLACK = 0,
VGA_COLOR_BLUE = 1,
VGA_COLOR_GREEN = 2,
VGA_COLOR_CYAN = 3,
VGA_COLOR_RED = 4,
VGA_COLOR_MAGENTA = 5,
VGA_COLOR_BROWN = 6,
VGA_COLOR_LIGHT_GREY = 7,
VGA_COLOR_DARK_GREY = 8,
VGA_COLOR_LIGHT_BLUE = 9,
VGA_COLOR_LIGHT_GREEN = 10,
VGA_COLOR_LIGHT_CYAN = 11,
VGA_COLOR_LIGHT_RED = 12,
VGA_COLOR_LIGHT_MAGENTA = 13,
VGA_COLOR_LIGHT_BROWN = 14,
VGA_COLOR_WHITE = 15,
} vga_color;
/*
* bg fg
* 1110 0101
*/
#define vga_entry_color(fg, bg) (bg << 4 | fg)
/*
* color character
* 1110 0101 1001 1010
*/
#define vga_entry(character, color) \
((uint16_t) color << 8 | (uint16_t) character)
bool vga_text_buffer_is_initialized(void);
void vga_text_buffer_initialize(void);
void vga_text_buffer_write_char(const char);
void vga_text_buffer_write_string(const char *string);
void vga_text_buffer_printf(const char *string, ...);
#endif
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