Add initial ol.WebLGLMapRenderer experiments (size not working)

src/ol/webglrenderer/webglmaprenderer.js

@@ -1,14 +1,19 @@
 goog.provide('ol.WebGLMapRenderer');
 
+goog.require('goog.dom');
+goog.require('goog.style');
+goog.require('goog.webgl');
 goog.require('ol.Layer');
 goog.require('ol.MapRenderer');
 goog.require('ol.TileStore');
+goog.require('ol.webglrenderer.IGLObject');
 
 
 
 /**
  * @constructor
  * @extends {ol.MapRenderer}
+ * @implements {ol.webglrenderer.IGLObject}
  * @param {!HTMLDivElement} target Target.
  * @param {Object.<string, *>=} opt_values Values.
  */
@@ -16,6 +21,30 @@ ol.WebGLMapRenderer = function(target, opt_values) {
 
   goog.base(this, target);
 
+  /**
+   * @private
+   * @type {Element}
+   */
+  this.canvas_ = goog.dom.createElement('canvas');
+  target.appendChild(this.canvas_);
+
+  /**
+   * @private
+   * @type {WebGLRenderingContext}
+   */
+  this.gl_ = null;
+
+  /** @type {WebGLRenderingContext} */
+  var gl = this.canvas_.getContext('experimental-webgl', {
+    alpha: false,
+    depth: false,
+    antialias: true,
+    stencil: false,
+    preserveDrawingBuffer: false
+  });
+  goog.asserts.assert(!goog.isNull(gl));
+  this.setGL(gl);
+
   if (goog.isDef(opt_values)) {
     this.setValues(opt_values);
   }
@@ -42,3 +71,103 @@ ol.WebGLMapRenderer.prototype.createLayerRenderer = function(layer) {
   }
   return null;
 };
+
+
+/**
+ * @inheritDoc
+ */
+ol.WebGLMapRenderer.prototype.disposeInternal = function() {
+  this.setGL(null);
+  goog.base(this, 'disposeInternal');
+};
+
+
+/**
+ * @inheritDoc
+ */
+ol.WebGLMapRenderer.prototype.getGL = function() {
+  var gl = this.gl_;
+  goog.asserts.assert(!goog.isNull(gl));
+  return gl;
+};
+
+
+/**
+ * @inheritDoc
+ */
+ol.WebGLMapRenderer.prototype.handleCameraPropertyChanged = function() {
+  this.redraw_();
+};
+
+
+/**
+ * @inheritDoc
+ */
+ol.WebGLMapRenderer.prototype.handleLayerAdd = function(layer) {
+  goog.base(this, 'handleLayerAdd', layer);
+  this.redraw_();
+};
+
+
+/**
+ * @inheritDoc
+ */
+ol.WebGLMapRenderer.prototype.handleLayerRemove = function(layer) {
+  goog.base(this, 'handleLayerRemove', layer);
+  this.redraw_();
+};
+
+
+/**
+ * @inheritDoc
+ */
+ol.WebGLMapRenderer.prototype.handleTargetResize = function(event) {
+  goog.base(this, 'handleTargetResize', event);
+  this.updateSize_();
+};
+
+
+/**
+ * @private
+ */
+ol.WebGLMapRenderer.prototype.redraw_ = function() {
+
+  var gl = this.getGL();
+
+  gl.clear(goog.webgl.COLOR_BUFFER_BIT);
+
+};
+
+
+/**
+ * @inheritDoc
+ */
+ol.WebGLMapRenderer.prototype.setGL = function(gl) {
+  if (!goog.isNull(this.gl_)) {
+    this.gl_ = null;
+  }
+  this.gl_ = gl;
+  if (!goog.isNull(gl)) {
+    gl.clearColor(1, 0, 0, 1);
+    gl.disable(goog.webgl.CULL_FACE);
+    gl.disable(goog.webgl.DEPTH_TEST);
+    gl.disable(goog.webgl.SCISSOR_TEST);
+    this.updateSize_();
+    this.redraw_();
+  }
+};
+
+
+/**
+ * @private
+ */
+ol.WebGLMapRenderer.prototype.updateSize_ = function() {
+  var size = this.getSize();
+  this.canvas_.width = size.width;
+  this.canvas_.height = size.height;
+  var gl = this.gl_;
+  if (!goog.isNull(gl)) {
+    gl.viewport(0, 0, size.width, size.height);
+    this.redraw_();
+  }
+};