forked from Bananymous/banan-os
144 lines
2.9 KiB
C++
144 lines
2.9 KiB
C++
#include <kernel/IO.h>
|
|
#include <kernel/multiboot.h>
|
|
#include <kernel/panic.h>
|
|
#include <kernel/tty.h>
|
|
|
|
#include "vga.h"
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
|
|
static size_t VGA_WIDTH;
|
|
static size_t VGA_HEIGHT;
|
|
static uint16_t* VGA_MEMORY;
|
|
|
|
static size_t terminal_row;
|
|
static size_t terminal_col;
|
|
static uint8_t terminal_color;
|
|
static uint16_t* terminal_buffer;
|
|
|
|
void terminal_putentryat(unsigned char c, uint8_t color, size_t x, size_t y)
|
|
{
|
|
const size_t index = y * VGA_WIDTH + x;
|
|
terminal_buffer[index] = vga_entry(c, color);
|
|
}
|
|
|
|
void terminal_clear()
|
|
{
|
|
for (size_t y = 0; y < VGA_HEIGHT; y++)
|
|
for (size_t x = 0; x < VGA_WIDTH; x++)
|
|
terminal_putentryat(' ', terminal_color, x, y);
|
|
}
|
|
|
|
void terminal_initialize()
|
|
{
|
|
if (s_multiboot_info->flags & (1 << 12))
|
|
{
|
|
const framebuffer_info_t& fb = s_multiboot_info->framebuffer;
|
|
VGA_WIDTH = fb.width;
|
|
VGA_HEIGHT = fb.height;
|
|
VGA_MEMORY = (uint16_t*)fb.addr;
|
|
}
|
|
else
|
|
{
|
|
VGA_WIDTH = 80;
|
|
VGA_HEIGHT = 25;
|
|
VGA_MEMORY = (uint16_t*)0xB8000;
|
|
}
|
|
|
|
terminal_row = 0;
|
|
terminal_col = 0;
|
|
terminal_color = vga_entry_color(VGA_COLOR_WHITE, VGA_COLOR_BLACK);
|
|
terminal_buffer = VGA_MEMORY;
|
|
terminal_clear();
|
|
|
|
if (s_multiboot_info->flags & (1 << 12))
|
|
if (s_multiboot_info->framebuffer.type != 2)
|
|
Kernel::panic("Invalid framebuffer_type in multiboot info");
|
|
}
|
|
|
|
void terminal_setcolor(uint8_t color)
|
|
{
|
|
terminal_color = color;
|
|
}
|
|
|
|
void terminal_scroll_line(size_t line)
|
|
{
|
|
for (size_t x = 0; x < VGA_WIDTH; x++)
|
|
{
|
|
const size_t index = line * VGA_WIDTH + x;
|
|
terminal_buffer[index - VGA_WIDTH] = terminal_buffer[index];
|
|
}
|
|
}
|
|
|
|
void terminal_clear_line(size_t line)
|
|
{
|
|
for (size_t x = 0; x < VGA_WIDTH; x++)
|
|
terminal_putentryat(' ', terminal_color, x, line);
|
|
}
|
|
|
|
static void terminal_update_cursor()
|
|
{
|
|
uint16_t pos = terminal_row * VGA_WIDTH + terminal_col;
|
|
IO::outb(0x3D4, 0x0F);
|
|
IO::outb(0x3D5, (uint8_t) (pos & 0xFF));
|
|
IO::outb(0x3D4, 0x0E);
|
|
IO::outb(0x3D5, (uint8_t) ((pos >> 8) & 0xFF));
|
|
}
|
|
|
|
void terminal_set_cursor_pos(int x, int y)
|
|
{
|
|
terminal_row = y;
|
|
terminal_col = x;
|
|
terminal_update_cursor();
|
|
}
|
|
|
|
void terminal_putchar(char c)
|
|
{
|
|
if (c == '\n')
|
|
{
|
|
terminal_col = 0;
|
|
terminal_row++;
|
|
}
|
|
else if (c == '\b')
|
|
{
|
|
if (terminal_col > 0)
|
|
terminal_col--;
|
|
terminal_putentryat(' ', terminal_color, terminal_col, terminal_row);
|
|
}
|
|
else
|
|
{
|
|
terminal_putentryat(c, terminal_color, terminal_col, terminal_row);
|
|
terminal_col++;
|
|
}
|
|
|
|
if (terminal_col == VGA_WIDTH)
|
|
{
|
|
terminal_col = 0;
|
|
terminal_row++;
|
|
}
|
|
|
|
if (terminal_row == VGA_HEIGHT)
|
|
{
|
|
for (size_t line = 1; line < VGA_HEIGHT; line++)
|
|
terminal_scroll_line(line);
|
|
terminal_clear_line(VGA_HEIGHT - 1);
|
|
|
|
terminal_col = 0;
|
|
terminal_row = VGA_HEIGHT - 1;
|
|
}
|
|
|
|
terminal_update_cursor();
|
|
}
|
|
|
|
void terminal_write(const char* data, size_t size)
|
|
{
|
|
for (size_t i = 0; i < size; i++)
|
|
terminal_putchar(data[i]);
|
|
}
|
|
|
|
void terminal_writestring(const char* data)
|
|
{
|
|
terminal_write(data, strlen(data));
|
|
} |