The raster pipeline takes a feature Collection and renders them to a Graphics2D object.

Functional Requirements

• Renders geometries from a feature store
• Maintains a caches to improve rendering performance
• Transform between the following coordinate systems when needed
  • LayerCS
    • The Coordinate System that the features are in when they reach the feature renderer
  • mapCS
    • The Coordinate System that the user will see on the screen
  • textCS
    • The Java2D coordinate system.
  • DeviceCS
    • The device coordinate system. Each "unit" is a pixel of device-dependent size.
• Styles features with SLD styling
• Renders non-selected features onto on Graphics2D
• Selected Features:
  • Renders selected features to a Graphics2D (not the same Graphics2D as selected features)
  • Styles selected Features based on SLD

Non-functional Requirements:

• Render features set in 3-5 seconds
• Must be able to render customized styles.
• Multiple rendering options:
  • Render all features associated with a query
  • render a selection
  • Rendering status can be on/off Feature Renderer Pipeline

Design Notes:

• Inputs:
  • FeatureStore
  • Query
  • Selection Filters
  • Style
  • view area
• Outputs:
  • ImageBuffer with rendered features
  • ImageBuffer with selected features
• Listens to net.refractions.udig.project.context for Bbox and SRS events
• Listens to DataStore for feature change events
• Listens to net.refractions.udig.project.selection for selection events