620 lines
16 KiB
JavaScript
620 lines
16 KiB
JavaScript
// FIXME clear textureCache
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// FIXME defer texture loads until after render when animating
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// FIXME generational tile texture garbage collector newFrame/get
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// FIXME defer cleanup until post-render
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// FIXME check against gl.getParameter(webgl.MAX_TEXTURE_SIZE)
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goog.provide('ol.renderer.webgl.Map');
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goog.provide('ol.renderer.webgl.map.shader');
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goog.require('goog.debug.Logger');
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goog.require('goog.dispose');
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goog.require('goog.dom');
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goog.require('goog.dom.TagName');
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goog.require('goog.events');
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goog.require('goog.events.Event');
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goog.require('goog.events.EventType');
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goog.require('goog.functions');
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goog.require('goog.style');
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goog.require('goog.webgl');
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goog.require('ol.Tile');
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goog.require('ol.layer.Layer');
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goog.require('ol.layer.TileLayer');
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goog.require('ol.renderer.webgl.FragmentShader');
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goog.require('ol.renderer.webgl.TileLayer');
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goog.require('ol.renderer.webgl.VertexShader');
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goog.require('ol.webgl');
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goog.require('ol.webgl.WebGLContextEventType');
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/**
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* @typedef {{magFilter: number, minFilter: number, texture: WebGLTexture}}
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*/
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ol.renderer.webgl.TextureCacheEntry;
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/**
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* @constructor
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* @extends {ol.renderer.webgl.FragmentShader}
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* @see https://svn.webkit.org/repository/webkit/trunk/Source/WebCore/platform/graphics/filters/skia/SkiaImageFilterBuilder.cpp
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*/
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ol.renderer.webgl.map.shader.Fragment = function() {
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goog.base(this, [
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'precision mediump float;',
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'',
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'uniform mat4 uColorMatrix;',
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'uniform float uOpacity;',
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'uniform mat4 uMatrix;',
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'uniform sampler2D uTexture;',
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'',
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'varying vec2 vTexCoord;',
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'',
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'void main(void) {',
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'',
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' vec4 texCoord = uMatrix * vec4(vTexCoord, 0., 1.);',
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' vec4 texColor = texture2D(uTexture, texCoord.st);',
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' vec4 color = uColorMatrix * vec4(texColor.rgb, 1.);',
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' color.a = texColor.a * uOpacity;',
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'',
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' gl_FragColor = color;',
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'',
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'}'
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].join('\n'));
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};
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goog.inherits(
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ol.renderer.webgl.map.shader.Fragment, ol.renderer.webgl.FragmentShader);
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goog.addSingletonGetter(ol.renderer.webgl.map.shader.Fragment);
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/**
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* @constructor
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* @extends {ol.renderer.webgl.VertexShader}
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*/
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ol.renderer.webgl.map.shader.Vertex = function() {
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goog.base(this, [
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'attribute vec2 aPosition;',
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'attribute vec2 aTexCoord;',
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'',
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'varying vec2 vTexCoord;',
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'',
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'void main(void) {',
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' gl_Position = vec4(aPosition, 0., 1.);',
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' vTexCoord = aTexCoord;',
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'}'
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].join('\n'));
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};
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goog.inherits(
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ol.renderer.webgl.map.shader.Vertex, ol.renderer.webgl.VertexShader);
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goog.addSingletonGetter(ol.renderer.webgl.map.shader.Vertex);
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/**
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* @constructor
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* @extends {ol.renderer.Map}
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* @param {Element} container Container.
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* @param {ol.Map} map Map.
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*/
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ol.renderer.webgl.Map = function(container, map) {
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goog.base(this, container, map);
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if (goog.DEBUG) {
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/**
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* @inheritDoc
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*/
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this.logger = goog.debug.Logger.getLogger(
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'ol.renderer.webgl.maprenderer.' + goog.getUid(this));
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}
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/**
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* @private
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* @type {Element}
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*/
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this.canvas_ = goog.dom.createElement(goog.dom.TagName.CANVAS);
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this.canvas_.height = container.clientHeight;
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this.canvas_.width = container.clientWidth;
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this.canvas_.className = 'ol-unselectable';
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goog.dom.insertChildAt(container, this.canvas_, 0);
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/**
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* @private
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* @type {ol.Size}
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*/
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this.canvasSize_ = new ol.Size(container.clientHeight, container.clientWidth);
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/**
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* @private
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* @type {WebGLRenderingContext}
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*/
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this.gl_ = ol.webgl.getContext(this.canvas_, {
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alpha: false,
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antialias: true,
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depth: false,
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preserveDrawingBuffer: false,
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stencil: false
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});
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goog.asserts.assert(!goog.isNull(this.gl_));
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goog.events.listen(this.canvas_, ol.webgl.WebGLContextEventType.LOST,
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this.handleWebGLContextLost, false, this);
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goog.events.listen(this.canvas_, ol.webgl.WebGLContextEventType.RESTORED,
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this.handleWebGLContextResourced, false, this);
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/**
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* @private
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* @type {ol.Color}
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*/
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this.clearColor_ = new ol.Color(1, 1, 1, 1);
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/**
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* @private
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* @type {{aPosition: number,
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* aTexCoord: number,
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* uColorMatrix: WebGLUniformLocation,
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* uMatrix: WebGLUniformLocation,
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* uOpacity: WebGLUniformLocation,
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* uTexture: WebGLUniformLocation}|null}
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*/
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this.locations_ = null;
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/**
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* @private
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* @type {WebGLBuffer}
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*/
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this.arrayBuffer_ = null;
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/**
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* @private
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* @type {Object.<number, WebGLShader>}
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*/
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this.shaderCache_ = {};
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/**
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* @private
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* @type {Object.<string, WebGLProgram>}
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*/
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this.programCache_ = {};
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/**
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* @private
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* @type {Object.<string, ol.renderer.webgl.TextureCacheEntry>}
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*/
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this.textureCache_ = {};
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/**
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* @private
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* @type {ol.renderer.webgl.FragmentShader}
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*/
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this.fragmentShader_ = ol.renderer.webgl.map.shader.Fragment.getInstance();
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/**
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* @private
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* @type {ol.renderer.webgl.VertexShader}
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*/
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this.vertexShader_ = ol.renderer.webgl.map.shader.Vertex.getInstance();
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/**
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* @private
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* @type {Object.<number, null|number>}
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*/
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this.layerRendererChangeListenKeys_ = {};
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this.initializeGL_();
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};
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goog.inherits(ol.renderer.webgl.Map, ol.renderer.Map);
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/**
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* @inheritDoc
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*/
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ol.renderer.webgl.Map.prototype.addLayer = function(layer) {
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goog.base(this, 'addLayer', layer);
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if (layer.getVisible()) {
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this.getMap().render();
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}
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};
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/**
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* @param {ol.Tile} tile Tile.
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* @param {number} magFilter Mag filter.
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* @param {number} minFilter Min filter.
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*/
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ol.renderer.webgl.Map.prototype.bindTileTexture =
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function(tile, magFilter, minFilter) {
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var gl = this.getGL();
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var tileKey = tile.getKey();
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var textureCacheEntry = this.textureCache_[tileKey];
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if (goog.isDef(textureCacheEntry)) {
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gl.bindTexture(goog.webgl.TEXTURE_2D, textureCacheEntry.texture);
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if (textureCacheEntry.magFilter != magFilter) {
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gl.texParameteri(
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goog.webgl.TEXTURE_2D, goog.webgl.TEXTURE_MAG_FILTER, magFilter);
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textureCacheEntry.magFilter = magFilter;
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}
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if (textureCacheEntry.minFilter != minFilter) {
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gl.texParameteri(
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goog.webgl.TEXTURE_2D, goog.webgl.TEXTURE_MAG_FILTER, minFilter);
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textureCacheEntry.minFilter = minFilter;
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}
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} else {
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var texture = gl.createTexture();
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gl.bindTexture(goog.webgl.TEXTURE_2D, texture);
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gl.texImage2D(goog.webgl.TEXTURE_2D, 0, goog.webgl.RGBA, goog.webgl.RGBA,
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goog.webgl.UNSIGNED_BYTE, tile.getImage());
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gl.texParameteri(
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goog.webgl.TEXTURE_2D, goog.webgl.TEXTURE_MAG_FILTER, magFilter);
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gl.texParameteri(
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goog.webgl.TEXTURE_2D, goog.webgl.TEXTURE_MIN_FILTER, minFilter);
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gl.texParameteri(goog.webgl.TEXTURE_2D, goog.webgl.TEXTURE_WRAP_S,
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goog.webgl.CLAMP_TO_EDGE);
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gl.texParameteri(goog.webgl.TEXTURE_2D, goog.webgl.TEXTURE_WRAP_T,
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goog.webgl.CLAMP_TO_EDGE);
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this.textureCache_[tileKey] = {
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texture: texture,
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magFilter: magFilter,
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minFilter: minFilter
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};
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}
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};
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/**
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* @inheritDoc
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*/
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ol.renderer.webgl.Map.prototype.canRotate = goog.functions.TRUE;
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/**
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* @inheritDoc
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*/
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ol.renderer.webgl.Map.prototype.createLayerRenderer = function(layer) {
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var gl = this.getGL();
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if (layer instanceof ol.layer.TileLayer) {
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return new ol.renderer.webgl.TileLayer(this, layer);
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} else {
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goog.asserts.assert(false);
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return null;
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}
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};
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/**
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* @inheritDoc
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*/
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ol.renderer.webgl.Map.prototype.disposeInternal = function() {
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var gl = this.getGL();
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if (!gl.isContextLost()) {
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goog.object.forEach(this.programCache_, function(program) {
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gl.deleteProgram(program);
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});
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goog.object.forEach(this.shaderCache_, function(shader) {
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gl.deleteShader(shader);
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});
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goog.object.forEach(this.textureCache_, function(textureCacheEntry) {
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gl.deleteTexture(textureCacheEntry.texture);
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});
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}
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goog.base(this, 'disposeInternal');
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};
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/**
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* @param {function(this: T, ol.layer.Layer, ol.renderer.webgl.Layer, number)} f
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* Function.
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* @param {T=} opt_obj Object.
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* @template T
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*/
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ol.renderer.webgl.Map.prototype.forEachReadyVisibleLayer =
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function(f, opt_obj) {
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var layers = this.map.getLayers();
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if (goog.isDef(layers)) {
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layers.forEach(function(layer, index) {
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if (layer.isReady() && layer.getVisible()) {
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var layerRenderer = this.getLayerRenderer(layer);
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f.call(opt_obj, layer, layerRenderer, index);
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}
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}, this);
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}
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};
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/**
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* @return {WebGLRenderingContext} GL.
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*/
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ol.renderer.webgl.Map.prototype.getGL = function() {
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return this.gl_;
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};
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/**
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* @param {ol.renderer.webgl.FragmentShader} fragmentShaderObject
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* Fragment shader.
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* @param {ol.renderer.webgl.VertexShader} vertexShaderObject Vertex shader.
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* @return {WebGLProgram} Program.
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*/
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ol.renderer.webgl.Map.prototype.getProgram = function(
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fragmentShaderObject, vertexShaderObject) {
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var programKey =
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goog.getUid(fragmentShaderObject) + '/' + goog.getUid(vertexShaderObject);
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if (programKey in this.programCache_) {
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return this.programCache_[programKey];
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} else {
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var gl = this.getGL();
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var program = gl.createProgram();
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gl.attachShader(program, this.getShader(fragmentShaderObject));
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gl.attachShader(program, this.getShader(vertexShaderObject));
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gl.linkProgram(program);
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if (goog.DEBUG) {
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if (!gl.getProgramParameter(program, goog.webgl.LINK_STATUS) &&
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!gl.isContextLost()) {
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this.logger.severe(gl.getProgramInfoLog(program));
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goog.asserts.assert(
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gl.getProgramParameter(program, goog.webgl.LINK_STATUS));
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}
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}
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this.programCache_[programKey] = program;
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return program;
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}
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};
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/**
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* @param {ol.renderer.webgl.Shader} shaderObject Shader object.
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* @return {WebGLShader} Shader.
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*/
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ol.renderer.webgl.Map.prototype.getShader = function(shaderObject) {
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var shaderKey = goog.getUid(shaderObject);
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if (shaderKey in this.shaderCache_) {
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return this.shaderCache_[shaderKey];
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} else {
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var gl = this.getGL();
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var shader = gl.createShader(shaderObject.getType());
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gl.shaderSource(shader, shaderObject.getSource());
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gl.compileShader(shader);
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if (goog.DEBUG) {
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if (!gl.getShaderParameter(shader, goog.webgl.COMPILE_STATUS) &&
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!gl.isContextLost()) {
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this.logger.severe(gl.getShaderInfoLog(shader));
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goog.asserts.assert(
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gl.getShaderParameter(shader, goog.webgl.COMPILE_STATUS));
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}
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}
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this.shaderCache_[shaderKey] = shader;
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return shader;
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}
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};
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/**
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* @inheritDoc
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*/
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ol.renderer.webgl.Map.prototype.handleBackgroundColorChanged = function() {
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var backgroundColor = this.getMap().getBackgroundColor();
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this.clearColor_ = new ol.Color(
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backgroundColor.r / 255,
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backgroundColor.g / 255,
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backgroundColor.b / 255,
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backgroundColor.a / 255);
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this.getMap().render();
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};
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/**
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* @inheritDoc
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*/
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ol.renderer.webgl.Map.prototype.handleViewPropertyChanged = function() {
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goog.base(this, 'handleViewPropertyChanged');
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this.getMap().render();
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};
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/**
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* @param {goog.events.Event} event Event.
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* @protected
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*/
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ol.renderer.webgl.Map.prototype.handleLayerRendererChange = function(event) {
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this.getMap().render();
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};
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/**
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* @inheritDoc
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*/
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ol.renderer.webgl.Map.prototype.handleSizeChanged = function() {
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goog.base(this, 'handleSizeChanged');
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this.getMap().render();
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};
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/**
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* @inheritDoc
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*/
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ol.renderer.webgl.Map.prototype.handleViewChanged = function() {
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goog.base(this, 'handleViewChanged');
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this.getMap().render();
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};
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/**
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* @param {goog.events.Event} event Event.
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* @protected
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*/
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ol.renderer.webgl.Map.prototype.handleWebGLContextLost = function(event) {
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if (goog.DEBUG) {
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this.logger.info('WebGLContextLost');
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}
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event.preventDefault();
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this.locations_ = null;
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this.arrayBuffer_ = null;
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this.shaderCache_ = {};
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this.programCache_ = {};
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this.textureCache_ = {};
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goog.object.forEach(this.layerRenderers, function(layerRenderer) {
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layerRenderer.handleWebGLContextLost();
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});
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};
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/**
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* @protected
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*/
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ol.renderer.webgl.Map.prototype.handleWebGLContextResourced = function() {
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if (goog.DEBUG) {
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this.logger.info('WebGLContextResourced');
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}
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this.initializeGL_();
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this.getMap().render();
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};
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/**
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* @private
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*/
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ol.renderer.webgl.Map.prototype.initializeGL_ = function() {
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var gl = this.gl_;
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gl.activeTexture(goog.webgl.TEXTURE0);
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gl.blendFunc(goog.webgl.SRC_ALPHA, goog.webgl.ONE_MINUS_SRC_ALPHA);
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gl.disable(goog.webgl.CULL_FACE);
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gl.disable(goog.webgl.DEPTH_TEST);
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gl.disable(goog.webgl.SCISSOR_TEST);
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};
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/**
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* @param {ol.Tile} tile Tile.
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* @return {boolean} Is tile texture loaded.
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*/
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ol.renderer.webgl.Map.prototype.isTileTextureLoaded = function(tile) {
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return tile.getKey() in this.textureCache_;
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};
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/**
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* @inheritDoc
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*/
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ol.renderer.webgl.Map.prototype.removeLayer = function(layer) {
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goog.base(this, 'removeLayer', layer);
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if (layer.getVisible()) {
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this.getMap().render();
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}
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};
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/**
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* @inheritDoc
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*/
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ol.renderer.webgl.Map.prototype.removeLayerRenderer = function(layer) {
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var layerRenderer = goog.base(this, 'removeLayerRenderer', layer);
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if (!goog.isNull(layerRenderer)) {
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var layerKey = goog.getUid(layer);
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goog.events.unlistenByKey(this.layerRendererChangeListenKeys_[layerKey]);
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delete this.layerRendererChangeListenKeys_[layerKey];
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}
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return layerRenderer;
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};
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/**
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* @inheritDoc
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*/
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ol.renderer.webgl.Map.prototype.renderFrame = function(time) {
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var map = this.getMap();
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if (!map.isDef()) {
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return;
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}
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var requestRenderFrame = false;
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this.forEachReadyVisibleLayer(function(layer, layerRenderer) {
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if (layerRenderer.renderFrame(time)) {
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requestRenderFrame = true;
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}
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});
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var size = /** @type {ol.Size} */ (this.getMap().getSize());
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if (!this.canvasSize_.equals(size)) {
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this.canvas_.width = size.width;
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this.canvas_.height = size.height;
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this.canvasSize_ = size;
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|
}
|
|
|
|
var gl = this.getGL();
|
|
|
|
gl.bindFramebuffer(goog.webgl.FRAMEBUFFER, null);
|
|
|
|
gl.clearColor(this.clearColor_.r, this.clearColor_.g, this.clearColor_.b,
|
|
this.clearColor_.a);
|
|
gl.clear(goog.webgl.COLOR_BUFFER_BIT);
|
|
gl.enable(goog.webgl.BLEND);
|
|
gl.viewport(0, 0, size.width, size.height);
|
|
|
|
var program = this.getProgram(this.fragmentShader_, this.vertexShader_);
|
|
gl.useProgram(program);
|
|
if (goog.isNull(this.locations_)) {
|
|
this.locations_ = {
|
|
aPosition: gl.getAttribLocation(program, 'aPosition'),
|
|
aTexCoord: gl.getAttribLocation(program, 'aTexCoord'),
|
|
uColorMatrix: gl.getUniformLocation(program, 'uColorMatrix'),
|
|
uMatrix: gl.getUniformLocation(program, 'uMatrix'),
|
|
uOpacity: gl.getUniformLocation(program, 'uOpacity'),
|
|
uTexture: gl.getUniformLocation(program, 'uTexture')
|
|
};
|
|
}
|
|
|
|
if (goog.isNull(this.arrayBuffer_)) {
|
|
var arrayBuffer = gl.createBuffer();
|
|
gl.bindBuffer(goog.webgl.ARRAY_BUFFER, arrayBuffer);
|
|
gl.bufferData(goog.webgl.ARRAY_BUFFER, new Float32Array([
|
|
-1, -1, 0, 0,
|
|
1, -1, 1, 0,
|
|
-1, 1, 0, 1,
|
|
1, 1, 1, 1
|
|
]), goog.webgl.STATIC_DRAW);
|
|
this.arrayBuffer_ = arrayBuffer;
|
|
} else {
|
|
gl.bindBuffer(goog.webgl.ARRAY_BUFFER, this.arrayBuffer_);
|
|
}
|
|
|
|
gl.enableVertexAttribArray(this.locations_.aPosition);
|
|
gl.vertexAttribPointer(
|
|
this.locations_.aPosition, 2, goog.webgl.FLOAT, false, 16, 0);
|
|
gl.enableVertexAttribArray(this.locations_.aTexCoord);
|
|
gl.vertexAttribPointer(
|
|
this.locations_.aTexCoord, 2, goog.webgl.FLOAT, false, 16, 8);
|
|
gl.uniform1i(this.locations_.uTexture, 0);
|
|
|
|
this.forEachReadyVisibleLayer(function(layer, layerRenderer) {
|
|
gl.uniformMatrix4fv(
|
|
this.locations_.uMatrix, false, layerRenderer.getMatrix());
|
|
gl.uniformMatrix4fv(
|
|
this.locations_.uColorMatrix, false, layerRenderer.getColorMatrix());
|
|
gl.uniform1f(this.locations_.uOpacity, layer.getOpacity());
|
|
gl.bindTexture(goog.webgl.TEXTURE_2D, layerRenderer.getTexture());
|
|
gl.drawArrays(goog.webgl.TRIANGLE_STRIP, 0, 4);
|
|
}, this);
|
|
|
|
if (requestRenderFrame) {
|
|
this.getMap().requestRenderFrame();
|
|
}
|
|
|
|
};
|
|
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
ol.renderer.webgl.Map.prototype.setLayerRenderer = function(
|
|
layer, layerRenderer) {
|
|
goog.base(this, 'setLayerRenderer', layer, layerRenderer);
|
|
var layerKey = goog.getUid(layer);
|
|
this.layerRendererChangeListenKeys_[layerKey] = goog.events.listen(
|
|
layerRenderer, goog.events.EventType.CHANGE,
|
|
this.handleLayerRendererChange, false, this);
|
|
};
|