diff options
author | Danny Holman <dholman@gymli.org> | 2025-01-12 01:17:36 -0600 |
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committer | Danny Holman <dholman@gymli.org> | 2025-01-12 01:19:11 -0600 |
commit | 95cd78840f0891e60f5ebecc8a8eb4fbaf3c2ebf (patch) | |
tree | c8c35347b50477929727fa5be9f5d0f55cbe18fd /drivers/video/framebuffer.c | |
parent | 5e166f3042a8e7b3031aae4da7006f80caa53ecc (diff) |
PROJECT RESTRUCTURING
Move the entire kernel into its own directory. Create new directories
for system commands, libraries and other required essentials for a
complete Unix-like operating system.
Signed-off-by: Danny Holman <dholman@gymli.org>
Diffstat (limited to 'drivers/video/framebuffer.c')
-rw-r--r-- | drivers/video/framebuffer.c | 109 |
1 files changed, 0 insertions, 109 deletions
diff --git a/drivers/video/framebuffer.c b/drivers/video/framebuffer.c deleted file mode 100644 index 3df3df4..0000000 --- a/drivers/video/framebuffer.c +++ /dev/null @@ -1,109 +0,0 @@ -#include <kernel/video/framebuffer.h> -#include <kernel/video/vga.h> -#include <kernel/asm.h> -#include <kernel/kthread.h> -#include <kernel/paging.h> -#include <kernel/pic.h> -#include <libk/string.h> -#include <stddef.h> -#include <stdint.h> - -static size_t fb_row; -static size_t fb_column; -static uint8_t fb_color; -static uint16_t *framebuffer; - -void _enable_cursor(uint8_t cursor_start, uint8_t cursor_end) { - outb(0x3D4, 0x0A); - outb(0x3D5, (inb(0x3D5) & 0xC0) | cursor_start); - - outb(0x3D4, 0x0B); - outb(0x3D5, (inb(0x3D5) & 0xE0) | cursor_end); -} - -void _update_cursor(size_t x, size_t y) { - uint16_t pos = y * VGA_WIDTH + x; - - outb(0x3D4, 0x0F); - outb(0x3D5, (uint8_t)(pos & 0xFF)); - outb(0x3D4, 0x0E); - outb(0x3D5, (uint8_t)((pos >> 8) & 0xFF)); -} - -void _fb_putentryat(unsigned char c, uint8_t color, size_t x, size_t y) { - const size_t index = y * VGA_WIDTH + x; - framebuffer[index] = vga_entry(c, color); -} - -void _fb_scroll(void) { - for (size_t i = 0; i < VGA_HEIGHT-1; i++) { - for (size_t j = 0; j < VGA_WIDTH; j++) - framebuffer[i * VGA_WIDTH + j] = VGA_MEMORY[(i+1) * VGA_WIDTH + j]; - } -} - -void fb_init(void) { - fb_row = 0; - fb_column = 0; - fb_color = vga_entry_color(VGA_COLOR_LIGHT_GREY, VGA_COLOR_BLACK); - framebuffer = VGA_MEMORY; - for (size_t y = 0; y < VGA_HEIGHT; y++) { - for (size_t x = 0; x < VGA_WIDTH; x++) - _fb_putentryat(' ', fb_color, x, y); - } - _enable_cursor(0, 0); - _update_cursor(0, 0); -} - -void fb_setcolor(uint8_t color) { - fb_color = color; -} - -void fb_setpos(int x, int y) { - fb_row = y; - fb_column = x; - _update_cursor(fb_column, fb_row+1); -} - -void fb_offsetpos(int dx, int dy) { - fb_row += dy; - fb_column += dx; - _update_cursor(fb_column, fb_row+1); -} - -void fb_putchar(char c) { - unsigned char uc = c; - switch (uc) { - case '\r': - fb_column = 0; - break; - case '\n': - fb_column = 0; - if (++fb_row == VGA_HEIGHT) { - fb_row--; - _fb_scroll(); - } - break; - case '\t': - fb_column += 4; - if (++fb_column == VGA_WIDTH) { - fb_column = 4; - if (++fb_row == VGA_HEIGHT) { - fb_row--; - _fb_scroll(); - } - } - break; - default: - _fb_putentryat(uc, fb_color, fb_column, fb_row); - if (++fb_column == VGA_WIDTH) { - fb_column = 0; - if (++fb_row == VGA_HEIGHT) { - fb_row--; - _fb_scroll(); - } - } - break; - } - _update_cursor(fb_column, fb_row+1); -} |