506 lines
19 KiB
JavaScript
506 lines
19 KiB
JavaScript
/**
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* @module ol/renderer/canvas/VectorTileLayer
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*/
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import {getUid} from '../../util.js';
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import LayerType from '../../LayerType.js';
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import TileState from '../../TileState.js';
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import ViewHint from '../../ViewHint.js';
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import {createCanvasContext2D} from '../../dom.js';
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import {listen, unlisten} from '../../events.js';
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import EventType from '../../events/EventType.js';
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import rbush from 'rbush';
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import {buffer, containsCoordinate, equals, getIntersection, getTopLeft, intersects} from '../../extent.js';
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import VectorTileRenderType from '../../layer/VectorTileRenderType.js';
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import {equivalent as equivalentProjection} from '../../proj.js';
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import Units from '../../proj/Units.js';
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import ReplayType from '../../render/ReplayType.js';
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import {labelCache, rotateAtOffset} from '../../render/canvas.js';
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import CanvasReplayGroup, {replayDeclutter} from '../../render/canvas/ReplayGroup.js';
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import {ORDER} from '../../render/replay.js';
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import CanvasTileLayerRenderer from './TileLayer.js';
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import {getSquaredTolerance as getSquaredRenderTolerance, renderFeature} from '../vector.js';
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import {
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create as createTransform,
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compose as composeTransform,
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reset as resetTransform,
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scale as scaleTransform,
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translate as translateTransform
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} from '../../transform.js';
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/**
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* @type {!Object<string, Array<import("../../render/ReplayType.js").default>>}
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*/
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const IMAGE_REPLAYS = {
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'image': [ReplayType.POLYGON, ReplayType.CIRCLE,
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ReplayType.LINE_STRING, ReplayType.IMAGE, ReplayType.TEXT],
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'hybrid': [ReplayType.POLYGON, ReplayType.LINE_STRING]
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};
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/**
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* @type {!Object<string, Array<import("../../render/ReplayType.js").default>>}
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*/
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const VECTOR_REPLAYS = {
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'image': [ReplayType.DEFAULT],
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'hybrid': [ReplayType.IMAGE, ReplayType.TEXT, ReplayType.DEFAULT],
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'vector': ORDER
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};
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/**
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* @classdesc
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* Canvas renderer for vector tile layers.
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* @api
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*/
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class CanvasVectorTileLayerRenderer extends CanvasTileLayerRenderer {
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/**
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* @param {import("../../layer/VectorTile.js").default} layer VectorTile layer.
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*/
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constructor(layer) {
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super(layer, true);
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/**
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* Declutter tree.
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* @private
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*/
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this.declutterTree_ = layer.getDeclutter() ? rbush(9, undefined) : null;
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/**
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* @private
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* @type {boolean}
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*/
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this.dirty_ = false;
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/**
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* @private
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* @type {number}
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*/
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this.renderedLayerRevision_;
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/**
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* @private
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* @type {import("../../transform.js").Transform}
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*/
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this.tmpTransform_ = createTransform();
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const renderMode = layer.getRenderMode();
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// Use lower resolution for pure vector rendering. Closest resolution otherwise.
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this.zDirection = renderMode === VectorTileRenderType.VECTOR ? 1 : 0;
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if (renderMode !== VectorTileRenderType.VECTOR) {
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this.context = createCanvasContext2D();
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}
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listen(labelCache, EventType.CLEAR, this.handleFontsChanged_, this);
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}
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/**
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* @inheritDoc
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*/
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disposeInternal() {
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unlisten(labelCache, EventType.CLEAR, this.handleFontsChanged_, this);
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super.disposeInternal();
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}
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/**
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* @inheritDoc
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*/
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getTile(z, x, y, pixelRatio, projection) {
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const tile = super.getTile(z, x, y, pixelRatio, projection);
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if (tile.getState() === TileState.LOADED) {
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this.createReplayGroup_(/** @type {import("../../VectorImageTile.js").default} */ (tile), pixelRatio, projection);
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if (this.context) {
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this.renderTileImage_(/** @type {import("../../VectorImageTile.js").default} */ (tile), pixelRatio, projection);
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}
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}
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return tile;
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}
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/**
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* @inheritDoc
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*/
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getTileImage(tile) {
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const tileLayer = /** @type {import("../../layer/Tile.js").default} */ (this.getLayer());
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return /** @type {import("../../VectorImageTile.js").default} */ (tile).getImage(tileLayer);
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}
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/**
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* @inheritDoc
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*/
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prepareFrame(frameState, layerState) {
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const layer = /** @type {import("../../layer/Vector.js").default} */ (this.getLayer());
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const layerRevision = layer.getRevision();
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if (this.renderedLayerRevision_ != layerRevision) {
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this.renderedTiles.length = 0;
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}
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this.renderedLayerRevision_ = layerRevision;
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return super.prepareFrame(frameState, layerState);
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}
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/**
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* @param {import("../../VectorImageTile.js").default} tile Tile.
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* @param {number} pixelRatio Pixel ratio.
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* @param {import("../../proj/Projection.js").default} projection Projection.
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* @private
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*/
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createReplayGroup_(tile, pixelRatio, projection) {
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const layer = /** @type {import("../../layer/Vector.js").default} */ (this.getLayer());
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const revision = layer.getRevision();
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const renderOrder = /** @type {import("../../render.js").OrderFunction} */ (layer.getRenderOrder()) || null;
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const replayState = tile.getReplayState(layer);
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if (!replayState.dirty && replayState.renderedRevision == revision &&
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replayState.renderedRenderOrder == renderOrder) {
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return;
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}
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const source = /** @type {import("../../source/VectorTile.js").default} */ (layer.getSource());
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const sourceTileGrid = source.getTileGrid();
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const tileGrid = source.getTileGridForProjection(projection);
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const resolution = tileGrid.getResolution(tile.tileCoord[0]);
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const tileExtent = tile.extent;
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for (let t = 0, tt = tile.tileKeys.length; t < tt; ++t) {
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const sourceTile = tile.getTile(tile.tileKeys[t]);
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if (sourceTile.getState() != TileState.LOADED) {
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continue;
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}
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const sourceTileCoord = sourceTile.tileCoord;
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const sourceTileExtent = sourceTileGrid.getTileCoordExtent(sourceTileCoord);
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const sharedExtent = getIntersection(tileExtent, sourceTileExtent);
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const bufferedExtent = equals(sourceTileExtent, sharedExtent) ? null :
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buffer(sharedExtent, layer.getRenderBuffer() * resolution, this.tmpExtent);
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const tileProjection = sourceTile.getProjection();
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let reproject = false;
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if (!equivalentProjection(projection, tileProjection)) {
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reproject = true;
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sourceTile.setProjection(projection);
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}
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replayState.dirty = false;
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const replayGroup = new CanvasReplayGroup(0, sharedExtent, resolution,
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pixelRatio, source.getOverlaps(), this.declutterTree_, layer.getRenderBuffer());
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const squaredTolerance = getSquaredRenderTolerance(resolution, pixelRatio);
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/**
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* @param {import("../../Feature.js").FeatureLike} feature Feature.
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* @this {CanvasVectorTileLayerRenderer}
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*/
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const render = function(feature) {
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let styles;
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const styleFunction = feature.getStyleFunction() || layer.getStyleFunction();
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if (styleFunction) {
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styles = styleFunction(feature, resolution);
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}
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if (styles) {
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const dirty = this.renderFeature(feature, squaredTolerance, styles, replayGroup);
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this.dirty_ = this.dirty_ || dirty;
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replayState.dirty = replayState.dirty || dirty;
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}
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};
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const features = sourceTile.getFeatures();
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if (renderOrder && renderOrder !== replayState.renderedRenderOrder) {
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features.sort(renderOrder);
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}
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for (let i = 0, ii = features.length; i < ii; ++i) {
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const feature = features[i];
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if (reproject) {
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if (tileProjection.getUnits() == Units.TILE_PIXELS) {
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// projected tile extent
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tileProjection.setWorldExtent(sourceTileExtent);
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// tile extent in tile pixel space
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tileProjection.setExtent(sourceTile.getExtent());
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}
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feature.getGeometry().transform(tileProjection, projection);
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}
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if (!bufferedExtent || intersects(bufferedExtent, feature.getGeometry().getExtent())) {
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render.call(this, feature);
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}
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}
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replayGroup.finish();
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sourceTile.setReplayGroup(layer, tile.tileCoord.toString(), replayGroup);
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}
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replayState.renderedRevision = revision;
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replayState.renderedRenderOrder = renderOrder;
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}
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/**
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* @inheritDoc
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*/
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forEachFeatureAtCoordinate(coordinate, frameState, hitTolerance, callback, thisArg) {
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const resolution = frameState.viewState.resolution;
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const rotation = frameState.viewState.rotation;
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hitTolerance = hitTolerance == undefined ? 0 : hitTolerance;
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const layer = this.getLayer();
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/** @type {!Object<string, boolean>} */
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const features = {};
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const renderedTiles = /** @type {Array<import("../../VectorImageTile.js").default>} */ (this.renderedTiles);
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let bufferedExtent, found;
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let i, ii;
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for (i = 0, ii = renderedTiles.length; i < ii; ++i) {
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const tile = renderedTiles[i];
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bufferedExtent = buffer(tile.extent, hitTolerance * resolution, bufferedExtent);
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if (!containsCoordinate(bufferedExtent, coordinate)) {
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continue;
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}
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for (let t = 0, tt = tile.tileKeys.length; t < tt; ++t) {
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const sourceTile = tile.getTile(tile.tileKeys[t]);
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if (sourceTile.getState() != TileState.LOADED) {
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continue;
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}
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const replayGroup = /** @type {CanvasReplayGroup} */ (sourceTile.getReplayGroup(layer,
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tile.tileCoord.toString()));
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found = found || replayGroup.forEachFeatureAtCoordinate(coordinate, resolution, rotation, hitTolerance, {},
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/**
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* @param {import("../../Feature.js").FeatureLike} feature Feature.
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* @return {?} Callback result.
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*/
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function(feature) {
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const key = getUid(feature);
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if (!(key in features)) {
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features[key] = true;
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return callback.call(thisArg, feature, layer);
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}
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}, null);
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}
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}
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return found;
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}
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/**
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* @param {import("../../VectorTile.js").default} tile Tile.
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* @param {import("../../PluggableMap.js").FrameState} frameState Frame state.
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* @return {import("../../transform.js").Transform} transform Transform.
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* @private
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*/
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getReplayTransform_(tile, frameState) {
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const layer = this.getLayer();
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const source = /** @type {import("../../source/VectorTile.js").default} */ (layer.getSource());
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const tileGrid = source.getTileGrid();
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const tileCoord = tile.tileCoord;
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const tileResolution = tileGrid.getResolution(tileCoord[0]);
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const viewState = frameState.viewState;
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const pixelRatio = frameState.pixelRatio;
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const renderResolution = viewState.resolution / pixelRatio;
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const tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent);
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const center = viewState.center;
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const origin = getTopLeft(tileExtent);
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const size = frameState.size;
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const offsetX = Math.round(pixelRatio * size[0] / 2);
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const offsetY = Math.round(pixelRatio * size[1] / 2);
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return composeTransform(this.tmpTransform_,
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offsetX, offsetY,
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tileResolution / renderResolution, tileResolution / renderResolution,
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viewState.rotation,
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(origin[0] - center[0]) / tileResolution,
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(center[1] - origin[1]) / tileResolution);
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}
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/**
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* @param {import("../../events/Event.js").default} event Event.
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*/
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handleFontsChanged_(event) {
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const layer = this.getLayer();
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if (layer.getVisible() && this.renderedLayerRevision_ !== undefined) {
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layer.changed();
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}
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}
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/**
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* Handle changes in image style state.
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* @param {import("../../events/Event.js").default} event Image style change event.
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* @private
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*/
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handleStyleImageChange_(event) {
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this.renderIfReadyAndVisible();
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}
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/**
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* @inheritDoc
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*/
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postCompose(context, frameState, layerState) {
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const layer = /** @type {import("../../layer/Vector.js").default} */ (this.getLayer());
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const renderMode = layer.getRenderMode();
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if (renderMode != VectorTileRenderType.IMAGE) {
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const declutterReplays = layer.getDeclutter() ? {} : null;
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const source = /** @type {import("../../source/VectorTile.js").default} */ (layer.getSource());
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const replayTypes = VECTOR_REPLAYS[renderMode];
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const pixelRatio = frameState.pixelRatio;
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const rotation = frameState.viewState.rotation;
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const size = frameState.size;
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let offsetX, offsetY;
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if (rotation) {
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offsetX = Math.round(pixelRatio * size[0] / 2);
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offsetY = Math.round(pixelRatio * size[1] / 2);
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rotateAtOffset(context, -rotation, offsetX, offsetY);
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}
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if (declutterReplays) {
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this.declutterTree_.clear();
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}
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const viewHints = frameState.viewHints;
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const snapToPixel = !(viewHints[ViewHint.ANIMATING] || viewHints[ViewHint.INTERACTING]);
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const tiles = this.renderedTiles;
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const tileGrid = source.getTileGridForProjection(frameState.viewState.projection);
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const clips = [];
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const zs = [];
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for (let i = tiles.length - 1; i >= 0; --i) {
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const tile = /** @type {import("../../VectorImageTile.js").default} */ (tiles[i]);
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if (tile.getState() == TileState.ABORT) {
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continue;
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}
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const tileCoord = tile.tileCoord;
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const worldOffset = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent)[0] - tile.extent[0];
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let transform = undefined;
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for (let t = 0, tt = tile.tileKeys.length; t < tt; ++t) {
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const sourceTile = tile.getTile(tile.tileKeys[t]);
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if (sourceTile.getState() != TileState.LOADED) {
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continue;
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}
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const replayGroup = /** @type {CanvasReplayGroup} */ (sourceTile.getReplayGroup(layer, tileCoord.toString()));
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if (!replayGroup || !replayGroup.hasReplays(replayTypes)) {
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// sourceTile was not yet loaded when this.createReplayGroup_() was
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// called, or it has no replays of the types we want to render
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continue;
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}
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if (!transform) {
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transform = this.getTransform(frameState, worldOffset);
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}
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const currentZ = sourceTile.tileCoord[0];
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const currentClip = replayGroup.getClipCoords(transform);
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context.save();
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context.globalAlpha = layerState.opacity;
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// Create a clip mask for regions in this low resolution tile that are
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// already filled by a higher resolution tile
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for (let j = 0, jj = clips.length; j < jj; ++j) {
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const clip = clips[j];
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if (currentZ < zs[j]) {
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context.beginPath();
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// counter-clockwise (outer ring) for current tile
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context.moveTo(currentClip[0], currentClip[1]);
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context.lineTo(currentClip[2], currentClip[3]);
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context.lineTo(currentClip[4], currentClip[5]);
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context.lineTo(currentClip[6], currentClip[7]);
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// clockwise (inner ring) for higher resolution tile
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context.moveTo(clip[6], clip[7]);
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context.lineTo(clip[4], clip[5]);
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context.lineTo(clip[2], clip[3]);
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context.lineTo(clip[0], clip[1]);
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context.clip();
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}
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}
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replayGroup.replay(context, transform, rotation, {}, snapToPixel, replayTypes, declutterReplays);
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context.restore();
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clips.push(currentClip);
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zs.push(currentZ);
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}
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}
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if (declutterReplays) {
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replayDeclutter(declutterReplays, context, rotation, snapToPixel);
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}
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if (rotation) {
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rotateAtOffset(context, rotation,
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/** @type {number} */ (offsetX), /** @type {number} */ (offsetY));
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}
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}
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super.postCompose(context, frameState, layerState);
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}
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/**
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* @param {import("../../Feature.js").FeatureLike} feature Feature.
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* @param {number} squaredTolerance Squared tolerance.
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* @param {import("../../style/Style.js").default|Array<import("../../style/Style.js").default>} styles The style or array of styles.
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* @param {import("../../render/canvas/ReplayGroup.js").default} replayGroup Replay group.
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* @return {boolean} `true` if an image is loading.
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*/
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renderFeature(feature, squaredTolerance, styles, replayGroup) {
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if (!styles) {
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return false;
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}
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let loading = false;
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if (Array.isArray(styles)) {
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for (let i = 0, ii = styles.length; i < ii; ++i) {
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loading = renderFeature(
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replayGroup, feature, styles[i], squaredTolerance,
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this.handleStyleImageChange_, this) || loading;
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}
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} else {
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loading = renderFeature(
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replayGroup, feature, styles, squaredTolerance,
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this.handleStyleImageChange_, this);
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}
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return loading;
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}
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/**
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* @param {import("../../VectorImageTile.js").default} tile Tile.
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* @param {number} pixelRatio Pixel ratio.
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* @param {import("../../proj/Projection.js").default} projection Projection.
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* @private
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*/
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renderTileImage_(tile, pixelRatio, projection) {
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const layer = /** @type {import("../../layer/Vector.js").default} */ (this.getLayer());
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const replayState = tile.getReplayState(layer);
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const revision = layer.getRevision();
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const replays = IMAGE_REPLAYS[layer.getRenderMode()];
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if (replays && replayState.renderedTileRevision !== revision) {
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replayState.renderedTileRevision = revision;
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const tileCoord = tile.wrappedTileCoord;
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const z = tileCoord[0];
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const source = /** @type {import("../../source/VectorTile.js").default} */ (layer.getSource());
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const tileGrid = source.getTileGridForProjection(projection);
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const resolution = tileGrid.getResolution(z);
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const context = tile.getContext(layer);
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const size = source.getTilePixelSize(z, pixelRatio, projection);
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context.canvas.width = size[0];
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context.canvas.height = size[1];
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const tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent);
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for (let i = 0, ii = tile.tileKeys.length; i < ii; ++i) {
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const sourceTile = tile.getTile(tile.tileKeys[i]);
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if (sourceTile.getState() != TileState.LOADED) {
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continue;
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}
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const pixelScale = pixelRatio / resolution;
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const transform = resetTransform(this.tmpTransform_);
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scaleTransform(transform, pixelScale, -pixelScale);
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translateTransform(transform, -tileExtent[0], -tileExtent[3]);
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const replayGroup = /** @type {CanvasReplayGroup} */ (sourceTile.getReplayGroup(layer,
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tile.tileCoord.toString()));
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replayGroup.replay(context, transform, 0, {}, true, replays);
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}
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}
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}
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}
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/**
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* Determine if this renderer handles the provided layer.
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* @param {import("../../layer/Layer.js").default} layer The candidate layer.
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* @return {boolean} The renderer can render the layer.
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*/
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CanvasVectorTileLayerRenderer['handles'] = function(layer) {
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return layer.getType() === LayerType.VECTOR_TILE;
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};
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/**
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* Create a layer renderer.
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* @param {import("../Map.js").default} mapRenderer The map renderer.
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* @param {import("../../layer/Layer.js").default} layer The layer to be rendererd.
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* @return {CanvasVectorTileLayerRenderer} The layer renderer.
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|
*/
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CanvasVectorTileLayerRenderer['create'] = function(mapRenderer, layer) {
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return new CanvasVectorTileLayerRenderer(/** @type {import("../../layer/VectorTile.js").default} */ (layer));
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};
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export default CanvasVectorTileLayerRenderer;
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