src/stages/Stage.js
function Stage(opts) {
  this._progressive = !!(opts && opts.progressive);

  // The list of layers in display order (background to foreground).
  this._layers = [];

  // The list of renderers; the i-th renderer is for the i-th layer.
  this._renderers = [];

  // The lists of tiles to load and render, populated during render().
  this._tilesToLoad = [];
  this._tilesToRender = [];

  // Temporary tile lists.
  this._tmpVisible = [];
  this._tmpChildren = [];

  // Cached stage dimensions.
  // Start with zero, which inhibits rendering until setSize() is called.
  this._width = 0;
  this._height = 0;

  // Temporary variable for rect.
  this._tmpRect = {};

  // Temporary variable for size.
  this._tmpSize = {};

  // Work queue for createTexture.
  this._createTextureWorkQueue = new WorkQueue();

  // Function to emit event when render parameters have changed.
  this._emitRenderInvalid = this._emitRenderInvalid.bind(this);

  // The renderer registry maps each geometry/view pair into the respective
  // Renderer class.
  this._rendererRegistry = new RendererRegistry();
}
function Stage(opts) {
  this._progressive = !!(opts && opts.progressive);

  // The list of layers in display order (background to foreground).
  this._layers = [];

  // The list of renderers; the i-th renderer is for the i-th layer.
  this._renderers = [];

  // The lists of tiles to load and render, populated during render().
  this._tilesToLoad = [];
  this._tilesToRender = [];

  // Temporary tile lists.
  this._tmpVisible = [];
  this._tmpChildren = [];

  // Cached stage dimensions.
  // Start with zero, which inhibits rendering until setSize() is called.
  this._width = 0;
  this._height = 0;

  // Temporary variable for rect.
  this._tmpRect = {};

  // Temporary variable for size.
  this._tmpSize = {};

  // Work queue for createTexture.
  this._createTextureWorkQueue = new WorkQueue();

  // Function to emit event when render parameters have changed.
  this._emitRenderInvalid = this._emitRenderInvalid.bind(this);

  // The renderer registry maps each geometry/view pair into the respective
  // Renderer class.
  this._rendererRegistry = new RendererRegistry();
}
function Stage ( opts ) { this . _progressive = ! ! ( opts && opts . progressive ) ; // The list of layers in display order (background to foreground). this . _layers = [ ] ; // The list of renderers; the i-th renderer is for the i-th layer. this . _renderers = [ ] ; // The lists of tiles to load and render, populated during render(). this . _tilesToLoad = [ ] ; this . _tilesToRender = [ ] ; // Temporary tile lists. this . _tmpVisible = [ ] ; this . _tmpChildren = [ ] ; // Cached stage dimensions. // Start with zero, which inhibits rendering until setSize() is called. this . _width = 0 ; this . _height = 0 ; // Temporary variable for rect. this . _tmpRect = { } ; // Temporary variable for size. this . _tmpSize = { } ; // Work queue for createTexture. this . _createTextureWorkQueue = new WorkQueue ( ) ; // Function to emit event when render parameters have changed. this . _emitRenderInvalid = this . _emitRenderInvalid . bind ( this ) ; // The renderer registry maps each geometry/view pair into the respective // Renderer class. this . _rendererRegistry = new RendererRegistry ( ) ; }
Signals that the contents of the stage have been invalidated and must be
rendered again.

This is used by the {@link RenderLoop} implementation.

@event Stage#renderInvalid
 
@interface Stage
@classdesc

A Stage is a container with the ability to render a stack of
{@link Layer layers}.

This is a superclass containing logic that is common to all implementations;
it should never be instantiated directly. Instead, use one of the
subclasses: {@link WebGlStage}, {@link CssStage} or {@link FlashStage}.

@param {Object} opts
@param {boolean} [opts.progressive=false]

Options listed here may be passed into the `opts` constructor argument of
subclasses.

The `progressive` option controls whether resolution levels are loaded in
order, from lowest to highest. This results in a more pleasing effect when
zooming past several levels in a large panoramas, but consumes additional
bandwidth.
Signals that the contents of the stage have been invalidated and must be rendered again .