planning

node_modules/ol/ImageCanvas.js

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+var __extends = (this && this.__extends) || (function () {
+    var extendStatics = function (d, b) {
+        extendStatics = Object.setPrototypeOf ||
+            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
+        return extendStatics(d, b);
+    };
+    return function (d, b) {
+        if (typeof b !== "function" && b !== null)
+            throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
+        extendStatics(d, b);
+        function __() { this.constructor = d; }
+        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+    };
+})();
+/**
+ * @module ol/ImageCanvas
+ */
+import ImageBase from './ImageBase.js';
+import ImageState from './ImageState.js';
+/**
+ * A function that is called to trigger asynchronous canvas drawing.  It is
+ * called with a "done" callback that should be called when drawing is done.
+ * If any error occurs during drawing, the "done" callback should be called with
+ * that error.
+ *
+ * @typedef {function(function(Error=): void): void} Loader
+ */
+var ImageCanvas = /** @class */ (function (_super) {
+    __extends(ImageCanvas, _super);
+    /**
+     * @param {import("./extent.js").Extent} extent Extent.
+     * @param {number} resolution Resolution.
+     * @param {number} pixelRatio Pixel ratio.
+     * @param {HTMLCanvasElement} canvas Canvas.
+     * @param {Loader} [opt_loader] Optional loader function to
+     *     support asynchronous canvas drawing.
+     */
+    function ImageCanvas(extent, resolution, pixelRatio, canvas, opt_loader) {
+        var _this = this;
+        var state = opt_loader !== undefined ? ImageState.IDLE : ImageState.LOADED;
+        _this = _super.call(this, extent, resolution, pixelRatio, state) || this;
+        /**
+         * Optional canvas loader function.
+         * @type {?Loader}
+         * @private
+         */
+        _this.loader_ = opt_loader !== undefined ? opt_loader : null;
+        /**
+         * @private
+         * @type {HTMLCanvasElement}
+         */
+        _this.canvas_ = canvas;
+        /**
+         * @private
+         * @type {?Error}
+         */
+        _this.error_ = null;
+        return _this;
+    }
+    /**
+     * Get any error associated with asynchronous rendering.
+     * @return {?Error} Any error that occurred during rendering.
+     */
+    ImageCanvas.prototype.getError = function () {
+        return this.error_;
+    };
+    /**
+     * Handle async drawing complete.
+     * @param {Error} [err] Any error during drawing.
+     * @private
+     */
+    ImageCanvas.prototype.handleLoad_ = function (err) {
+        if (err) {
+            this.error_ = err;
+            this.state = ImageState.ERROR;
+        }
+        else {
+            this.state = ImageState.LOADED;
+        }
+        this.changed();
+    };
+    /**
+     * Load not yet loaded URI.
+     */
+    ImageCanvas.prototype.load = function () {
+        if (this.state == ImageState.IDLE) {
+            this.state = ImageState.LOADING;
+            this.changed();
+            this.loader_(this.handleLoad_.bind(this));
+        }
+    };
+    /**
+     * @return {HTMLCanvasElement} Canvas element.
+     */
+    ImageCanvas.prototype.getImage = function () {
+        return this.canvas_;
+    };
+    return ImageCanvas;
+}(ImageBase));
+export default ImageCanvas;
+//# sourceMappingURL=ImageCanvas.js.map