PixMetron 

A WPF image viewport control with extensible facade architecture, multi-layered surface rendering, coordinate transformations, and composable input handling for pan/zoom and custom interactions.

Input handlers for ImageViewport providing configurable pan/zoom interactions with multi-button support, mouse wheel control, auto-fit modes, and extensible handler interfaces.

Extensible facade for ImageViewport with programmatic API for dynamic surface management, Z-index ordering, group operations, composable input routing, and batch updates.

Default facade for ImageViewport with XAML attached properties enabling zero-code image viewer setup with built-in pan/zoom, auto-fit, and image rendering.

Surface renderers for ImageViewport providing image display, primitive shapes, and visual overlays with automatic size detection, transform modes, and extensible ISurfaceRenderer interface.