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authorDanny Holman <dholman@gymli.org>2025-01-12 01:17:36 -0600
committerDanny Holman <dholman@gymli.org>2025-01-12 01:19:11 -0600
commit95cd78840f0891e60f5ebecc8a8eb4fbaf3c2ebf (patch)
treec8c35347b50477929727fa5be9f5d0f55cbe18fd /drivers/video/framebuffer.c
parent5e166f3042a8e7b3031aae4da7006f80caa53ecc (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.c109
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);
-}