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slinky55
2026-07-15 08:07:06 -05:00
parent c77d9e1725
commit 44a0c9aeba
9 changed files with 126 additions and 51 deletions
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91
kernel/drivers/vga/vga.c
View File

@@ -4,6 +4,7 @@
#include <lib/stream.h>
#include <drivers/vga/vga.h>
#include <drivers/serial/serial.h>
#include <common.h>
#include <memory/mm.h>
@@ -15,13 +16,55 @@ static uint32_t framebuffer_total_pixels;
static uint32_t framebuffer_pitch;
static uint32_t framebuffer_bpp;
static uint8_t red_mask_sz;
static uint8_t red_field_pos;
static uint8_t green_mask_sz;
static uint8_t green_field_pos;
static uint8_t blue_mask_sz;
static uint8_t blue_field_pos;
static uint32_t create_pixel(uint8_t r, uint8_t g, uint8_t b) {
return (r >> (8 - red_mask_sz)) << red_field_pos
| (g >> (8 - green_mask_sz)) << green_field_pos
| (b >> (8 - blue_mask_sz)) << blue_field_pos;
}
vga_color_t VGA_COLOR_BLACK = {0, 0, 0, 255};
vga_color_t VGA_COLOR_RED = {0, 0, 255, 255};
vga_color_t VGA_COLOR_GREEN = {0, 255, 0, 255};
vga_color_t VGA_COLOR_BLUE = {255, 0, 0, 255};
void vga_init(
uint32_t fb_paddr,
uint32_t fb_width,
uint32_t fb_height,
uint32_t fb_pitch,
uint8_t fb_bpp
uint8_t fb_bpp,
uint8_t _red_mask_sz,
uint8_t _red_field_pos,
uint8_t _green_mask_sz,
uint8_t _green_field_pos,
uint8_t _blue_mask_sz,
uint8_t _blue_field_pos
) {
framebuffer_address = VGA_FRAMEBUFFER;
red_mask_sz = _red_mask_sz;
red_field_pos = _red_field_pos;
green_mask_sz = _green_mask_sz;
green_field_pos = _green_field_pos;
blue_mask_sz = _blue_mask_sz;
blue_field_pos = _blue_field_pos;
print_serial("initializing vga.\r\n");
print_serial_hex(fb_paddr);
print_serial("\r\n");
print_serial_hex(framebuffer_address);
print_serial("\r\n");
print_serial("BPP: ");
print_serial_hex(fb_bpp);
print_serial("\r\n");
uint32_t fb_size_bytes = fb_height * fb_pitch;
uint32_t num_pages = (fb_size_bytes + 4095) / 4096;
for (uint32_t i = 0; i < num_pages; i++) {
@@ -30,36 +73,58 @@ void vga_init(
map_page(virt_addr, phys_addr, PAGE_PRESENT | PAGE_WRITABLE);
}
framebuffer_address = VGA_FRAMEBUFFER;
framebuffer_width = fb_width;
framebuffer_height = fb_height;
framebuffer_pitch = fb_pitch;
framebuffer_bpp = fb_bpp;
framebuffer_total_pixels = framebuffer_width * framebuffer_height;
vga_clear_scrn(0x000000FF);
framebuffer_pitch = fb_pitch;
framebuffer_bpp = fb_bpp;
vga_clear_scrn(0x00000000);
}
uint32_t vga_get_framebuffer() {
return framebuffer_address;
}
uint32_t vga_get_width() {
return framebuffer_width;
}
uint32_t vga_get_height() {
return framebuffer_height;
}
uint32_t vga_get_pitch() {
return framebuffer_pitch;
}
uint8_t vga_get_bpp() {
return framebuffer_bpp;
}
void vga_clear_scrn(uint32_t color) {
if (framebuffer_address == 0) return;
for (uint32_t y = 0; y < framebuffer_height; y++) {
uint32_t* row = (uint32_t*)((uintptr_t)framebuffer_address + (y * framebuffer_pitch));
uint8_t* fb_bytes = (uint8_t*)framebuffer_address;
uint8_t bytes_per_pixel = framebuffer_bpp / 8;
for (uint32_t y = 0; y < framebuffer_height; y++) {
uint8_t* row = fb_bytes + (y * framebuffer_pitch);
for (uint32_t x = 0; x < framebuffer_width; x++) {
row[x] = color;
uint8_t* pixel = row + (x * bytes_per_pixel);
switch(framebuffer_bpp) {
case 32: {
*(uint32_t*)pixel = color;
break;
}
}
}
}
}
void vga_drawchar(char c, int x, int y, psf_font_t* font) {
}
uint32_t vga_write(vfs_node_t* node, uint32_t offset, uint32_t size, uint8_t* buf) {
// probably just memcpy here
return size;
}

44
kernel/drivers/vga/vga.h
View File

@@ -4,39 +4,41 @@
#include <vfs.h>
#include <lib/font.h>
#define VGA_FRAMEBUFFER 0xFF700000
#define VGA_FRAMEBUFFER 0xF0000000
enum vga_color {
VGA_COLOR_BLACK = 0,
VGA_COLOR_BLUE = 1,
VGA_COLOR_GREEN = 2,
VGA_COLOR_CYAN = 3,
VGA_COLOR_RED = 4,
VGA_COLOR_MAGENTA = 5,
VGA_COLOR_BROWN = 6,
VGA_COLOR_LIGHT_GREY = 7,
VGA_COLOR_DARK_GREY = 8,
VGA_COLOR_LIGHT_BLUE = 9,
VGA_COLOR_LIGHT_GREEN = 10,
VGA_COLOR_LIGHT_CYAN = 11,
VGA_COLOR_LIGHT_RED = 12,
VGA_COLOR_LIGHT_MAGENTA = 13,
VGA_COLOR_LIGHT_BROWN = 14,
VGA_COLOR_WHITE = 15,
};
typedef struct {
uint8_t b;
uint8_t g;
uint8_t r;
uint8_t a;
} vga_color_t;
extern vga_color_t VGA_COLOR_BLACK;
extern vga_color_t VGA_COLOR_RED;
extern vga_color_t VGA_COLOR_GREEN;
extern vga_color_t VGA_COLOR_BLUE;
void vga_init(
uint32_t fb_paddr,
uint32_t fb_width,
uint32_t fb_height,
uint32_t fb_pitch,
uint8_t fb_bpp
uint8_t fb_bpp,
uint8_t red_mask_sz,
uint8_t red_field_pos,
uint8_t green_mask_sz,
uint8_t green_field_pos,
uint8_t blue_mask_sz,
uint8_t blue_field_pos
);
uint32_t vga_get_framebuffer();
uint32_t vga_get_width();
uint32_t vga_get_height();
uint32_t vga_get_pitch();
uint8_t vga_get_bpp();
void vga_clear_scrn(uint32_t color);
void vga_drawchar(char c, int x, int y, psf_font_t* font);
uint32_t vga_write(vfs_node_t* node, uint32_t offset, uint32_t size, uint8_t* buf);