Module item_rendering

module for rendering the tree of items

Structs

• CachedRenderingData
  This structure must be present in items that are Rendered and contains information. Used by the backend.
• DirtyRegion
  A region composed of a few rectangles that need to be redrawn.
• ItemCache
  A per-item cache.
• PartialRenderer
  Put this structure in the renderer to help with partial rendering
• PartialRenderingState
  This struct holds the state of the partial renderer between different frames, in particular the cache of the bounding rect of each item. This permits a more fine-grained computation of the region that needs to be repainted.

Enums

• RepaintBufferType
  This enum describes which parts of the buffer passed to the SoftwareRenderer may be re-used to speed up painting.

Traits

• ItemRenderer
  Trait used to render each items.
• RenderBorderRectangle
  Trait for an item that represent a Rectangle to the Renderer
• RenderImage
  Trait for an item that represents an Image towards the renderer
• RenderText
  Trait for an item that represents an Text towards the renderer

Functions

• is_clipping_item
  Return true if the item might be a clipping item
• item_children_bounding_rect
  Compute the bounding rect of all children. This does /not/ include item’s own bounding rect. Remember to run this via evaluate_no_tracking.
• render_component_items
  Renders the tree of items that component holds, using the specified renderer. Rendering is done relative to the specified origin.
• render_item_children
  Renders the children of the item with the specified index into the renderer.

Type Aliases

• PartialRenderingCache
  The cache that needs to be held by the Window for the partial rendering