Vinilog

It all starts when you decide to build your own Operating System. You go through the bootloader, enter protected mode, long mode, and finally manage to draw a pixel on the screen using VESA BIOS Extensions (VBE).

You celebrate.

Then you try to clear the entire screen with a solid color and realize it’s running at a staggering 5 FPS.

And the question is… But why?

So we start investigating. VBE basically gives you a physical address of the video memory, the Framebuffer. It’s a pointer. You write the colors there and the GPU shows it on the screen.

It all starts while playing Silent Hill 2. It is possible to see dynamic shadows where the shape depends on the direction and the mesh of the affected object.