matos/drivers/vga.h

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C
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#pragma once
#include "stdarg.h"
#include "stdint.h"
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// https://wiki.osdev.org/Text_UI
#define BLACK 0x00
#define BLUE 0x01
#define GREEN 0x02
#define CYAN 0x03
#define RED 0x04
#define MAGENTA 0x05
#define BROWN 0x06
#define GREY 0x07
#define WHITE 0x0F
#define VGA_ADDR 0xB8000
#define VGA_WIDTH 80
#define VGA_HEIGHT 25
#ifndef pr_fmt
#define pr_fmt(fmt) fmt
#endif
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void vprintf(const char *format, va_list ap);
void printf(const char *format, ...);
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int VGASetup(uint bgColor, uint color);
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void clearScreen(uint bgColor);
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void clearScreenLine(uint bgColor, uint line);
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void printInt(int integer);
void printIntDetails(int integer, uint color, uint bgColor, int startX, int startY);
void printCharDetails(char str, uint color, uint bgColor, int startX, int startY);
void printStringDetails(const char *str, uint color, uint bgColor, int startX, int startY);
void printString(const char *str);
void printChar(const char str);
void vgaScrollUp(void);
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void cursorEnable(uint8_t cursor_start, uint8_t cursor_end);
void cursorDisable(void);
void cursorMove(int x, int y);
/*
* Dummy printk for disabled debugging statements to use whilst maintaining
* gcc's format checking.
*/
#define no_printf(fmt, ...) \
({ \
if (0) \
printf(fmt, ##__VA_ARGS__); \
0; \
})
#ifdef DEBUG
#define pr_devel(fmt, ...) \
printf(pr_fmt(fmt), ##__VA_ARGS__)
#else
#define pr_devel(fmt, ...) \
no_printf(pr_fmt(fmt), ##__VA_ARGS__)
#endif
#define pr_info(fmt, ...) \
printf(pr_fmt(fmt), ##__VA_ARGS__)