Class: Postsvg::Translation::Handlers::EllipseHandler

Inherits:
Object
  • Object
show all
Extended by:
Shared
Defined in:
lib/postsvg/translation/handlers/ellipse_handler.rb

Class Method Summary collapse

Methods included from Shared

emit_fill, emit_paint, emit_paint_setup, emit_stroke, emit_transform, expand_bbox

Class Method Details

.call(element, context) ⇒ Object 



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# File 'lib/postsvg/translation/handlers/ellipse_handler.rb', line 9

def self.call(element, context)
  context.emitter.emit(Model::Operators::GraphicsState::Gsave.new)
  emit_transform(element, context)
  context.emitter.emit(Model::Operators::Path::Newpath.new)
  cx = element.cx
  cy = element.cy
  rx = element.rx
  ry = element.ry
  # Approximate ellipse with scale + arc.
  if rx.to_f.positive? && ry.to_f.positive?
    scale = rx / ry
    context.emitter.emit(Model::Operators::Transformations::Translate.new(tx: cx, ty: cy))
    context.emitter.emit(Model::Operators::Transformations::Scale.new(sx: scale, sy: 1))
    context.emitter.emit(Model::Operators::Path::Arc.new(x: 0, y: 0, radius: ry, angle1: 0, angle2: 360))
  end
  emit_paint(element, context)
  context.emitter.emit(Model::Operators::GraphicsState::Grestore.new)
  expand_bbox(context, cx - rx, cy - ry, cx + rx, cy + ry)
end