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| // FIXME offset panning
goog.provide('ol.renderer.canvas.Map');
goog.require('ol.transform');
goog.require('ol');
goog.require('ol.array');
goog.require('ol.css');
goog.require('ol.dom');
goog.require('ol.layer.Layer');
goog.require('ol.render.Event');
goog.require('ol.render.EventType');
goog.require('ol.render.canvas');
goog.require('ol.render.canvas.Immediate');
goog.require('ol.renderer.Map');
goog.require('ol.renderer.Type');
goog.require('ol.source.State');
/**
* @constructor
* @extends {ol.renderer.Map}
* @param {Element} container Container.
* @param {ol.PluggableMap} map Map.
* @api
*/
ol.renderer.canvas.Map = function(container, map) {
ol.renderer.Map.call(this, container, map);
/**
* @private
* @type {CanvasRenderingContext2D}
*/
this.context_ = ol.dom.createCanvasContext2D();
/**
* @private
* @type {HTMLCanvasElement}
*/
this.canvas_ = this.context_.canvas;
this.canvas_.style.width = '100%';
this.canvas_.style.height = '100%';
this.canvas_.style.display = 'block';
this.canvas_.className = ol.css.CLASS_UNSELECTABLE;
container.insertBefore(this.canvas_, container.childNodes[0] || null);
/**
* @private
* @type {boolean}
*/
this.renderedVisible_ = true;
/**
* @private
* @type {ol.Transform}
*/
this.transform_ = ol.transform.create();
};
ol.inherits(ol.renderer.canvas.Map, ol.renderer.Map);
/**
* Determine if this renderer handles the provided layer.
* @param {ol.renderer.Type} type The renderer type.
* @return {boolean} The renderer can render the layer.
*/
ol.renderer.canvas.Map['handles'] = function(type) {
return type === ol.renderer.Type.CANVAS;
};
/**
* Create the map renderer.
* @param {Element} container Container.
* @param {ol.PluggableMap} map Map.
* @return {ol.renderer.canvas.Map} The map renderer.
*/
ol.renderer.canvas.Map['create'] = function(container, map) {
return new ol.renderer.canvas.Map(container, map);
};
/**
* @param {ol.render.EventType} type Event type.
* @param {olx.FrameState} frameState Frame state.
* @private
*/
ol.renderer.canvas.Map.prototype.dispatchComposeEvent_ = function(type, frameState) {
var map = this.getMap();
var context = this.context_;
if (map.hasListener(type)) {
var extent = frameState.extent;
var pixelRatio = frameState.pixelRatio;
var viewState = frameState.viewState;
var rotation = viewState.rotation;
var transform = this.getTransform(frameState);
var vectorContext = new ol.render.canvas.Immediate(context, pixelRatio,
extent, transform, rotation);
var composeEvent = new ol.render.Event(type, vectorContext,
frameState, context, null);
map.dispatchEvent(composeEvent);
}
};
/**
* @param {olx.FrameState} frameState Frame state.
* @protected
* @return {!ol.Transform} Transform.
*/
ol.renderer.canvas.Map.prototype.getTransform = function(frameState) {
var viewState = frameState.viewState;
var dx1 = this.canvas_.width / 2;
var dy1 = this.canvas_.height / 2;
var sx = frameState.pixelRatio / viewState.resolution;
var sy = -sx;
var angle = -viewState.rotation;
var dx2 = -viewState.center[0];
var dy2 = -viewState.center[1];
return ol.transform.compose(this.transform_, dx1, dy1, sx, sy, angle, dx2, dy2);
};
/**
* @inheritDoc
*/
ol.renderer.canvas.Map.prototype.getType = function() {
return ol.renderer.Type.CANVAS;
};
/**
* @inheritDoc
*/
ol.renderer.canvas.Map.prototype.renderFrame = function(frameState) {
if (!frameState) {
if (this.renderedVisible_) {
this.canvas_.style.display = 'none';
this.renderedVisible_ = false;
}
return;
}
var context = this.context_;
var pixelRatio = frameState.pixelRatio;
var width = Math.round(frameState.size[0] * pixelRatio);
var height = Math.round(frameState.size[1] * pixelRatio);
if (this.canvas_.width != width || this.canvas_.height != height) {
this.canvas_.width = width;
this.canvas_.height = height;
} else {
context.clearRect(0, 0, width, height);
}
var rotation = frameState.viewState.rotation;
this.calculateMatrices2D(frameState);
this.dispatchComposeEvent_(ol.render.EventType.PRECOMPOSE, frameState);
var layerStatesArray = frameState.layerStatesArray;
ol.array.stableSort(layerStatesArray, ol.renderer.Map.sortByZIndex);
if (rotation) {
context.save();
ol.render.canvas.rotateAtOffset(context, rotation, width / 2, height / 2);
}
var viewResolution = frameState.viewState.resolution;
var i, ii, layer, layerRenderer, layerState;
for (i = 0, ii = layerStatesArray.length; i < ii; ++i) {
layerState = layerStatesArray[i];
layer = layerState.layer;
layerRenderer = /** @type {ol.renderer.canvas.Layer} */ (this.getLayerRenderer(layer));
if (!ol.layer.Layer.visibleAtResolution(layerState, viewResolution) ||
layerState.sourceState != ol.source.State.READY) {
continue;
}
if (layerRenderer.prepareFrame(frameState, layerState)) {
layerRenderer.composeFrame(frameState, layerState, context);
}
}
if (rotation) {
context.restore();
}
this.dispatchComposeEvent_(
ol.render.EventType.POSTCOMPOSE, frameState);
if (!this.renderedVisible_) {
this.canvas_.style.display = '';
this.renderedVisible_ = true;
}
this.scheduleRemoveUnusedLayerRenderers(frameState);
this.scheduleExpireIconCache(frameState);
};
/**
* @inheritDoc
*/
ol.renderer.canvas.Map.prototype.forEachLayerAtPixel = function(pixel, frameState, callback, thisArg,
layerFilter, thisArg2) {
var result;
var viewState = frameState.viewState;
var viewResolution = viewState.resolution;
var layerStates = frameState.layerStatesArray;
var numLayers = layerStates.length;
var coordinate = ol.transform.apply(
frameState.pixelToCoordinateTransform, pixel.slice());
var i;
for (i = numLayers - 1; i >= 0; --i) {
var layerState = layerStates[i];
var layer = layerState.layer;
if (ol.layer.Layer.visibleAtResolution(layerState, viewResolution) &&
layerFilter.call(thisArg2, layer)) {
var layerRenderer = /** @type {ol.renderer.canvas.Layer} */ (this.getLayerRenderer(layer));
result = layerRenderer.forEachLayerAtCoordinate(
coordinate, frameState, callback, thisArg);
if (result) {
return result;
}
}
}
return undefined;
};
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