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feature: vbe can now display pixels to the screen 🥳

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This commit is contained in:
0x35c 2024-12-09 10:06:57 +01:00
parent daf510687a
commit 738b285e62
1 changed files with 6 additions and 7 deletions
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13
src/multiboot.c
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@ -1,6 +1,7 @@
#include <stddef.h> #include <stddef.h>
#include <stdint.h> #include <stdint.h>
#include "commands.h"
#include "debug.h" #include "debug.h"
#include "kpanic.h" #include "kpanic.h"
#include "memory.h" #include "memory.h"
@ -30,22 +31,20 @@ static void init_mmap(multiboot_info_t *mbd_virt, size_t *pt_index)
static void init_vbe(multiboot_info_t *mbd_virt) static void init_vbe(multiboot_info_t *mbd_virt)
{ {
const uint32_t framebuffer_size = mbd_virt->framebuffer_height * const uint32_t framebuffer_size =
mbd_virt->framebuffer_width * mbd_virt->framebuffer_height * mbd_virt->framebuffer_pitch;
CEIL(mbd_virt->framebuffer_bpp, 4);
uint32_t i = 0; uint32_t i = 0;
for (; i < CEIL(framebuffer_size, PAGE_SIZE); i++) { for (; i < CEIL(framebuffer_size, PAGE_SIZE); i++) {
if (i % 1024 == 0)
page_directory[800 + i / 1024] =
((uint32_t)vbe_page_table - HEAP_END) | 0x03;
vbe_page_table[i % 1024] = vbe_page_table[i % 1024] =
((mbd_virt->framebuffer_addr + i * PAGE_SIZE) & PAGE_MASK) | ((mbd_virt->framebuffer_addr + i * PAGE_SIZE) & PAGE_MASK) |
INIT_FLAGS; INIT_FLAGS;
} }
display.buff = (uint32_t *)GET_PAGE_ADDR(800 + i - 1 / 1024, 0) + page_directory[800] = ((uint32_t)vbe_page_table - HEAP_END) | 0x03;
display.buff = (uint32_t *)GET_PAGE_ADDR(800, 0) +
(mbd_virt->framebuffer_addr % PAGE_SIZE); (mbd_virt->framebuffer_addr % PAGE_SIZE);
display.height = mbd_virt->framebuffer_height; display.height = mbd_virt->framebuffer_height;
display.width = mbd_virt->framebuffer_width; display.width = mbd_virt->framebuffer_width;
display.pitch = mbd_virt->framebuffer_pitch;
display.bpp = mbd_virt->framebuffer_bpp; display.bpp = mbd_virt->framebuffer_bpp;
} }