Add ol.renderer.canvas.ImageLayer

src/ol/renderer/canvas/canvasimagelayerrenderer.js

@@ -0,0 +1,121 @@
+goog.provide('ol.renderer.canvas.ImageLayer');
+
+goog.require('goog.vec.Mat4');
+goog.require('ol.Image');
+goog.require('ol.ImageState');
+goog.require('ol.ViewHint');
+goog.require('ol.layer.ImageLayer');
+goog.require('ol.renderer.Map');
+goog.require('ol.renderer.canvas.Layer');
+
+
+
+/**
+ * @constructor
+ * @extends {ol.renderer.canvas.Layer}
+ * @param {ol.renderer.Map} mapRenderer Map renderer.
+ * @param {ol.layer.ImageLayer} imageLayer Single image layer.
+ */
+ol.renderer.canvas.ImageLayer = function(mapRenderer, imageLayer) {
+
+  goog.base(this, mapRenderer, imageLayer);
+
+  /**
+   * @private
+   * @type {?ol.Image}
+   */
+  this.image_ = null;
+
+  /**
+   * @private
+   * @type {!goog.vec.Mat4.Number}
+   */
+  this.transform_ = goog.vec.Mat4.createNumber();
+
+};
+goog.inherits(ol.renderer.canvas.ImageLayer, ol.renderer.canvas.Layer);
+
+
+/**
+ * @inheritDoc
+ */
+ol.renderer.canvas.ImageLayer.prototype.getImage = function() {
+  return goog.isNull(this.image_) ?
+      null : this.image_.getImageElement(this);
+};
+
+
+/**
+ * @return {ol.layer.ImageLayer} Single image layer.
+ */
+ol.renderer.canvas.ImageLayer.prototype.getImageLayer = function() {
+  return /** @type {ol.layer.ImageLayer} */ (this.getLayer());
+};
+
+
+/**
+ * @inheritDoc
+ */
+ol.renderer.canvas.ImageLayer.prototype.getTransform = function() {
+  return this.transform_;
+};
+
+
+/**
+ * @inheritDoc
+ */
+ol.renderer.canvas.ImageLayer.prototype.renderFrame =
+    function(frameState, layerState) {
+
+  var view2DState = frameState.view2DState;
+  var viewCenter = view2DState.center;
+  var viewResolution = view2DState.resolution;
+  var viewRotation = view2DState.rotation;
+
+  var image;
+  var imageLayer = this.getImageLayer();
+  var imageSource = imageLayer.getImageSource();
+
+  var hints = frameState.viewHints;
+
+  if (!hints[ol.ViewHint.ANIMATING] && !hints[ol.ViewHint.PANNING]) {
+    image = imageSource.getImage(
+        frameState.extent, viewResolution);
+    var imageState = image.getState();
+    var animate = false;
+    if (imageState == ol.ImageState.ERROR) {
+      // pass
+    } else if (imageState == ol.ImageState.IDLE) {
+      animate = true;
+      image.load();
+    } else if (imageState == ol.ImageState.LOADING) {
+      animate = true;
+    } else if (imageState == ol.ImageState.LOADED) {
+      this.image_ = image;
+    }
+    if (animate) {
+      frameState.animate = true;
+    }
+  }
+
+  if (!goog.isNull(this.image_)) {
+    image = this.image_;
+    var imageExtent = image.getExtent();
+    var imageResolution = image.getResolution();
+    var transform = this.transform_;
+    goog.vec.Mat4.makeIdentity(transform);
+    goog.vec.Mat4.translate(transform,
+        frameState.size.width / 2, frameState.size.height / 2, 0);
+    goog.vec.Mat4.rotateZ(transform, viewRotation);
+    goog.vec.Mat4.scale(
+        transform,
+        imageResolution / viewResolution,
+        imageResolution / viewResolution,
+        1);
+    goog.vec.Mat4.translate(
+        transform,
+        (imageExtent.minX - viewCenter.x) / imageResolution,
+        (viewCenter.y - imageExtent.maxY) / imageResolution,
+        0);
+  }
+};

src/ol/renderer/canvas/canvasmaprenderer.js

@@ -7,8 +7,10 @@ goog.require('goog.dom');
 goog.require('goog.style');
 goog.require('goog.vec.Mat4');
 goog.require('ol.Size');
+goog.require('ol.layer.ImageLayer');
 goog.require('ol.layer.TileLayer');
 goog.require('ol.renderer.Map');
+goog.require('ol.renderer.canvas.ImageLayer');
 goog.require('ol.renderer.canvas.TileLayer');
 
 
@@ -59,7 +61,9 @@ goog.inherits(ol.renderer.canvas.Map, ol.renderer.Map);
  * @inheritDoc
  */
 ol.renderer.canvas.Map.prototype.createLayerRenderer = function(layer) {
-  if (layer instanceof ol.layer.TileLayer) {
+  if (layer instanceof ol.layer.ImageLayer) {
+    return new ol.renderer.canvas.ImageLayer(this, layer);
+  } else if (layer instanceof ol.layer.TileLayer) {
     return new ol.renderer.canvas.TileLayer(this, layer);
   } else {
     goog.asserts.assert(false);