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/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef VGA_H
#define VGA_H
#define VGA_FB 0xB8000
#define VGA_FB_SIZE 0x4000 /* char + attr = word sized so 0x8000 / 2 */
#define VGA_COLUMNS 80
#define VGA_LINES 25
#define VGA_TEXT_HORIZONTAL_TOP 0
#define VGA_TEXT_HORIZONTAL_MIDDLE (VGA_LINES / 2)
enum VGA_TEXT_ALIGNMENT {
VGA_TEXT_LEFT,
VGA_TEXT_CENTER,
VGA_TEXT_RIGHT,
};
void vga_io_init(void);
void vga_textmode_init(void);
void vga_cursor_enable(int enable);
void vga_cursor_reset(void);
void vga_cursor_set(unsigned int line, unsigned int character);
void vga_frame_set(unsigned int line, unsigned int character);
void vga_line_write(unsigned int line, const char *string);
/*
* vga_write_text() writes a line of text aligned left/center/right
* horizontally on the screen (i.e. enum VGA_TEXT_ALIGNMENT)
*/
void vga_write_text(enum VGA_TEXT_ALIGNMENT alignment, unsigned int line,
const unsigned char *ustring);
#endif /* VGA_H */
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