Lab 5: VBE Framebuffer And XPM

Generated folder: labs/graphics/

Lab 5 turns the screen into memory. You select a VBE-style graphics mode, map a linear framebuffer, compute pixel addresses, draw rectangles, parse small XPM sprites, and present frames.

Device Model

Concept	Meaning
mode info	width, height, pitch, bits per pixel
linear framebuffer	contiguous pixel memory
pitch	bytes between row starts
color format	how color bytes are stored
present	show the prepared frame

Pitch is not always width * bytes_per_pixel.

Plan

1. Query mode information.
2. Set the requested graphics mode.
3. Map the framebuffer once.
4. Compute pixel offsets with pitch.
5. Clip rectangles and sprites.

Next: implementation tasks.