Layers:

IPC / Client management
Compositor / Window Manager
Renderer / Window Contents

Renderers
Window Management
> "WM_CreateWindow(Parent, Class, Name)"
Window Drawing
> "WD_Fill"
> "WD_Blit"
> "WD_LockSurface"
> "WD_UnlockSurface"
Decorations
> ".InitWindow"
> ".Render"
+ "WM_SetBorder"
Compositing
> Dirty rectangling, use 2DCmd to selectively blit
> Request kernel/server buffers if possible


Clients own windows
Windows are composed of multiple regions that conform to several types (see below)
- Re-draw is handled by using these regions

Server-side rendering primitives:
 # Apply to regions, rendered in fixed order, each has an ID
> Auto-scaling bitmaps
 - Control backed by an image with three/five regions per axis
  Edge Fixed, Fill, Center Fixed, Fill, Edge Fixed
 - Definition is via two pixel counts (edge width, fill width), rest is derived
 - Command to switch backing image to another already provided
> Tiling bitmaps + filled rects
> Text (single line)
> Canvas (Takes drawing commands, draws to internal buffer)
> Shared buffer (of an unspecified pixel format)

=== Config options ===
- Root App
- Display device (- = stdout)
- Keyboard device (- = stdin)
- Mouse device
- Pipe suffix, port number, etc.
- Key bindings