Module: Idml::Render::Contour

Defined in:
lib/idml/render/contour.rb

Overview

Renders a page item's PathGeometry as true Bézier contours on a pdfrb canvas. Shared by OvalRenderer, PathRenderer, and PolygonRenderer: every item whose Properties carry a PathGeometry draws its actual outline — PathPointType anchors with LeftDirection / RightDirection control handles, ItemTransform applied, y flipped into PDF space — instead of its bounding box. Paint op selection (fill / stroke / gradient) lives in ShapePaint. Items without usable geometry fall back to the bounding-box rectangle.

Class Method Summary collapse

Class Method Details

.draw_path(canvas, paths, item_transform, page_height) ⇒ Object

Constructs the full path on the canvas: one subpath per GeometryPathType, each starting at its first anchor and curving through every subsequent anchor via the points' control handles. Closed paths (PathOpen false or absent) loop back to the first anchor and close.



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# File 'lib/idml/render/contour.rb', line 51

def self.draw_path(canvas, paths, item_transform, page_height)
  transform = Geometry.parse_transform(item_transform)
  paths.each do |path|
    draw_subpath(canvas, path, transform, page_height)
  end
end

.geometry_paths(item) ⇒ Object

All GeometryPathType children across the item's Properties.



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# File 'lib/idml/render/contour.rb', line 40

def self.geometry_paths(item)
  item.properties.flat_map do |props|
    props.path_geometry.flat_map(&:geometry_path_type)
  end
end

.render(canvas, context) ⇒ Object

Renders the item's contours with fill/stroke from ShapePaint. Returns true when painted.



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# File 'lib/idml/render/contour.rb', line 17

def self.render(canvas, context)
  item = context.item
  return false if item.visible == false

  paths = geometry_paths(item)
  return rectangle_fallback(canvas, item, context) if paths.empty?

  ShapePaint.paint(canvas, item, context) do |c|
    draw_path(c, paths, item.item_transform, context.page_height)
  end
end