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goog.require('ol'); goog.require('ol.LayerType'); goog.require('ol.TileRange'); goog.require('ol.TileState'); goog.require('ol.ViewHint'); goog.require('ol.array'); goog.require('ol.dom'); goog.require('ol.extent'); goog.require('ol.renderer.Type'); goog.require('ol.renderer.canvas.IntermediateCanvas'); goog.require('ol.transform'); /** * @constructor * @extends {ol.renderer.canvas.IntermediateCanvas} * @param {ol.layer.Tile|ol.layer.VectorTile} tileLayer Tile layer. * @api */ ol.renderer.canvas.TileLayer = function(tileLayer) { ol.renderer.canvas.IntermediateCanvas.call(this, tileLayer); /** * @protected * @type {CanvasRenderingContext2D} */ this.context = this.context === null ? null : ol.dom.createCanvasContext2D(); /** * @private * @type {number} */ this.oversampling_; /** * @private * @type {ol.Extent} */ this.renderedExtent_ = null; /** * @protected * @type {number} */ this.renderedRevision; /** * @protected * @type {!Array.<ol.Tile>} */ this.renderedTiles = []; /** * @protected * @type {ol.Extent} */ this.tmpExtent = ol.extent.createEmpty(); /** * @private * @type {ol.TileRange} */ this.tmpTileRange_ = new ol.TileRange(0, 0, 0, 0); /** * @private * @type {ol.Transform} */ this.imageTransform_ = ol.transform.create(); /** * @protected * @type {number} */ this.zDirection = 0; }; ol.inherits(ol.renderer.canvas.TileLayer, ol.renderer.canvas.IntermediateCanvas); /** * Determine if this renderer handles the provided layer. * @param {ol.renderer.Type} type The renderer type. * @param {ol.layer.Layer} layer The candidate layer. * @return {boolean} The renderer can render the layer. */ ol.renderer.canvas.TileLayer['handles'] = function(type, layer) { return type === ol.renderer.Type.CANVAS && layer.getType() === ol.LayerType.TILE; }; /** * Create a layer renderer. * @param {ol.renderer.Map} mapRenderer The map renderer. * @param {ol.layer.Layer} layer The layer to be rendererd. * @return {ol.renderer.canvas.TileLayer} The layer renderer. */ ol.renderer.canvas.TileLayer['create'] = function(mapRenderer, layer) { return new ol.renderer.canvas.TileLayer(/** @type {ol.layer.Tile} */ (layer)); }; /** * @private * @param {ol.Tile} tile Tile. * @return {boolean} Tile is drawable. */ ol.renderer.canvas.TileLayer.prototype.isDrawableTile_ = function(tile) { var tileState = tile.getState(); var useInterimTilesOnError = this.getLayer().getUseInterimTilesOnError(); return tileState == ol.TileState.LOADED || tileState == ol.TileState.EMPTY || tileState == ol.TileState.ERROR && !useInterimTilesOnError; }; /** * @inheritDoc */ ol.renderer.canvas.TileLayer.prototype.prepareFrame = function(frameState, layerState) { var pixelRatio = frameState.pixelRatio; var size = frameState.size; var viewState = frameState.viewState; var projection = viewState.projection; var viewResolution = viewState.resolution; var viewCenter = viewState.center; var tileLayer = this.getLayer(); var tileSource = /** @type {ol.source.Tile} */ (tileLayer.getSource()); var sourceRevision = tileSource.getRevision(); var tileGrid = tileSource.getTileGridForProjection(projection); var z = tileGrid.getZForResolution(viewResolution, this.zDirection); var tileResolution = tileGrid.getResolution(z); var oversampling = Math.round(viewResolution / tileResolution) || 1; var extent = frameState.extent; if (layerState.extent !== undefined) { extent = ol.extent.getIntersection(extent, layerState.extent); } Iif (ol.extent.isEmpty(extent)) { // Return false to prevent the rendering of the layer. return false; } var tileRange = tileGrid.getTileRangeForExtentAndResolution( extent, tileResolution); var imageExtent = tileGrid.getTileRangeExtent(z, tileRange); var tilePixelRatio = tileSource.getTilePixelRatio(pixelRatio); /** * @type {Object.<number, Object.<string, ol.Tile>>} */ var tilesToDrawByZ = {}; tilesToDrawByZ[z] = {}; var findLoadedTiles = this.createLoadedTileFinder( tileSource, projection, tilesToDrawByZ); var tmpExtent = this.tmpExtent; var tmpTileRange = this.tmpTileRange_; var newTiles = false; var tile, x, y; for (x = tileRange.minX; x <= tileRange.maxX; ++x) { for (y = tileRange.minY; y <= tileRange.maxY; ++y) { tile = tileSource.getTile(z, x, y, pixelRatio, projection); if (tile.getState() == ol.TileState.ERROR) { Iif (!tileLayer.getUseInterimTilesOnError()) { // When useInterimTilesOnError is false, we consider the error tile as loaded. tile.setState(ol.TileState.LOADED); } else Iif (tileLayer.getPreload() > 0) { // Preloaded tiles for lower resolutions might have finished loading. newTiles = true; } } if (!this.isDrawableTile_(tile)) { tile = tile.getInterimTile(); } if (this.isDrawableTile_(tile)) { if (tile.getState() == ol.TileState.LOADED) { tilesToDrawByZ[z][tile.tileCoord.toString()] = tile; if (!newTiles && this.renderedTiles.indexOf(tile) == -1) { newTiles = true; } } continue; } var fullyLoaded = tileGrid.forEachTileCoordParentTileRange( tile.tileCoord, findLoadedTiles, null, tmpTileRange, tmpExtent); Eif (!fullyLoaded) { var childTileRange = tileGrid.getTileCoordChildTileRange( tile.tileCoord, tmpTileRange, tmpExtent); Eif (childTileRange) { findLoadedTiles(z + 1, childTileRange); } } } } var renderedResolution = tileResolution * pixelRatio / tilePixelRatio * oversampling; var hints = frameState.viewHints; var animatingOrInteracting = hints[ol.ViewHint.ANIMATING] || hints[ol.ViewHint.INTERACTING]; if (!(this.renderedResolution && Date.now() - frameState.time > 16 && animatingOrInteracting) && ( newTiles || !(this.renderedExtent_ && ol.extent.containsExtent(this.renderedExtent_, extent)) || this.renderedRevision != sourceRevision || oversampling != this.oversampling_ || !animatingOrInteracting && renderedResolution != this.renderedResolution )) { var context = this.context; if (context) { var tilePixelSize = tileSource.getTilePixelSize(z, pixelRatio, projection); var width = Math.round(tileRange.getWidth() * tilePixelSize[0] / oversampling); var height = Math.round(tileRange.getHeight() * tilePixelSize[1] / oversampling); var canvas = context.canvas; if (canvas.width != width || canvas.height != height) { this.oversampling_ = oversampling; canvas.width = width; canvas.height = height; } else { context.clearRect(0, 0, width, height); oversampling = this.oversampling_; } } this.renderedTiles.length = 0; /** @type {Array.<number>} */ var zs = Object.keys(tilesToDrawByZ).map(Number); zs.sort(ol.array.numberSafeCompareFunction); var currentResolution, currentScale, currentTilePixelSize, currentZ, i, ii; var tileExtent, tileGutter, tilesToDraw, w, h; for (i = 0, ii = zs.length; i < ii; ++i) { currentZ = zs[i]; currentTilePixelSize = tileSource.getTilePixelSize(currentZ, pixelRatio, projection); currentResolution = tileGrid.getResolution(currentZ); currentScale = currentResolution / tileResolution; tileGutter = tilePixelRatio * tileSource.getGutter(projection); tilesToDraw = tilesToDrawByZ[currentZ]; for (var tileCoordKey in tilesToDraw) { tile = tilesToDraw[tileCoordKey]; tileExtent = tileGrid.getTileCoordExtent(tile.getTileCoord(), tmpExtent); x = (tileExtent[0] - imageExtent[0]) / tileResolution * tilePixelRatio / oversampling; y = (imageExtent[3] - tileExtent[3]) / tileResolution * tilePixelRatio / oversampling; w = currentTilePixelSize[0] * currentScale / oversampling; h = currentTilePixelSize[1] * currentScale / oversampling; this.drawTileImage(tile, frameState, layerState, x, y, w, h, tileGutter); this.renderedTiles.push(tile); } } this.renderedRevision = sourceRevision; this.renderedResolution = tileResolution * pixelRatio / tilePixelRatio * oversampling; this.renderedExtent_ = imageExtent; } var scale = this.renderedResolution / viewResolution; var transform = ol.transform.compose(this.imageTransform_, pixelRatio * size[0] / 2, pixelRatio * size[1] / 2, scale, scale, 0, (this.renderedExtent_[0] - viewCenter[0]) / this.renderedResolution * pixelRatio, (viewCenter[1] - this.renderedExtent_[3]) / this.renderedResolution * pixelRatio); ol.transform.compose(this.coordinateToCanvasPixelTransform, pixelRatio * size[0] / 2 - transform[4], pixelRatio * size[1] / 2 - transform[5], pixelRatio / viewResolution, -pixelRatio / viewResolution, 0, -viewCenter[0], -viewCenter[1]); this.updateUsedTiles(frameState.usedTiles, tileSource, z, tileRange); this.manageTilePyramid(frameState, tileSource, tileGrid, pixelRatio, projection, extent, z, tileLayer.getPreload()); this.scheduleExpireCache(frameState, tileSource); this.updateLogos(frameState, tileSource); return this.renderedTiles.length > 0; }; /** * @param {ol.Tile} tile Tile. * @param {olx.FrameState} frameState Frame state. * @param {ol.LayerState} layerState Layer state. * @param {number} x Left of the tile. * @param {number} y Top of the tile. * @param {number} w Width of the tile. * @param {number} h Height of the tile. * @param {number} gutter Tile gutter. */ ol.renderer.canvas.TileLayer.prototype.drawTileImage = function(tile, frameState, layerState, x, y, w, h, gutter) { Eif (!this.getLayer().getSource().getOpaque(frameState.viewState.projection)) { this.context.clearRect(x, y, w, h); } var image = tile.getImage(this.getLayer()); if (image) { this.context.drawImage(image, gutter, gutter, image.width - 2 * gutter, image.height - 2 * gutter, x, y, w, h); } }; /** * @inheritDoc */ ol.renderer.canvas.TileLayer.prototype.getImage = function() { var context = this.context; return context ? context.canvas : null; }; /** * @function * @return {ol.layer.Tile|ol.layer.VectorTile} */ ol.renderer.canvas.TileLayer.prototype.getLayer; /** * @inheritDoc */ ol.renderer.canvas.TileLayer.prototype.getImageTransform = function() { return this.imageTransform_; }; |