106 lines
2.8 KiB
JavaScript
106 lines
2.8 KiB
JavaScript
/**
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* @module ol/render/canvas/BuilderGroup
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*/
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import Builder from './Builder.js';
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import ImageBuilder from './ImageBuilder.js';
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import LineStringBuilder from './LineStringBuilder.js';
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import PolygonBuilder from './PolygonBuilder.js';
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import TextBuilder from './TextBuilder.js';
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/**
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* @type {Object<import("../canvas.js").BuilderType, typeof Builder>}
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*/
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const BATCH_CONSTRUCTORS = {
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'Circle': PolygonBuilder,
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'Default': Builder,
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'Image': ImageBuilder,
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'LineString': LineStringBuilder,
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'Polygon': PolygonBuilder,
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'Text': TextBuilder,
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};
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class BuilderGroup {
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/**
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* @param {number} tolerance Tolerance.
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* @param {import("../../extent.js").Extent} maxExtent Max extent.
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* @param {number} resolution Resolution.
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* @param {number} pixelRatio Pixel ratio.
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*/
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constructor(tolerance, maxExtent, resolution, pixelRatio) {
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/**
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* @private
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* @type {number}
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*/
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this.tolerance_ = tolerance;
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/**
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* @private
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* @type {import("../../extent.js").Extent}
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*/
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this.maxExtent_ = maxExtent;
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/**
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* @private
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* @type {number}
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*/
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this.pixelRatio_ = pixelRatio;
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/**
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* @private
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* @type {number}
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*/
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this.resolution_ = resolution;
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/**
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* @private
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* @type {!Object<string, !Object<import("../canvas.js").BuilderType, Builder>>}
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*/
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this.buildersByZIndex_ = {};
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}
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/**
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* @return {!Object<string, !Object<import("../canvas.js").BuilderType, import("./Builder.js").SerializableInstructions>>} The serializable instructions
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*/
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finish() {
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const builderInstructions = {};
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for (const zKey in this.buildersByZIndex_) {
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builderInstructions[zKey] = builderInstructions[zKey] || {};
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const builders = this.buildersByZIndex_[zKey];
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for (const builderKey in builders) {
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const builderInstruction = builders[builderKey].finish();
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builderInstructions[zKey][builderKey] = builderInstruction;
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}
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}
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return builderInstructions;
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}
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/**
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* @param {number|undefined} zIndex Z index.
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* @param {import("../canvas.js").BuilderType} builderType Replay type.
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* @return {import("../VectorContext.js").default} Replay.
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*/
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getBuilder(zIndex, builderType) {
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const zIndexKey = zIndex !== undefined ? zIndex.toString() : '0';
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let replays = this.buildersByZIndex_[zIndexKey];
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if (replays === undefined) {
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replays = {};
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this.buildersByZIndex_[zIndexKey] = replays;
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}
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let replay = replays[builderType];
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if (replay === undefined) {
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const Constructor = BATCH_CONSTRUCTORS[builderType];
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replay = new Constructor(
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this.tolerance_,
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this.maxExtent_,
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this.resolution_,
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this.pixelRatio_
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);
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replays[builderType] = replay;
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}
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return replay;
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}
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}
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export default BuilderGroup;
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