# Part III. Mutter Core Reference

Table of Contents

Main — Program startup.
Common — Mutter common types
Gradients — Metacity gradient rendering
Preferences — Mutter preferences
Utility functions — Miscellaneous utility functions
Errors — Mutter X error handling
MetaPlugin — Entry point for plugins
MetaBarrier — Pointer barriers
MetaRectangle — Simple box operations
MetaCompositor — Compositor API
MetaDisplay — Mutter X display handler
MetaGroup — Mutter window groups
MetaKeybinding — Key bindings
MetaBackgroundActor — Actor for painting the root window background
MetaShadowFactory — Create and cache shadow textures for abritrary window shapes
MetaShapedTexture — An actor to draw a masked texture.
MetaWindowActor — An actor representing a top-level window in the scene graph
MetaScreen — Mutter X screen handler
MetaWindow — Mutter X managed windows
MetaWorkspace — Workspaces

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