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import DataSet from './DataSet.js'

// See TileData.js for several rgbToData functions
// as well as their use with several tile servers

/**
 * Class for converting an image to a DataSet.
 *
 * @class
 * @extends DataSet
 */
class RGBDataSet extends DataSet {
    /**
     * Convert an r,g,b triple into an integer
     * @param {number} r Red value, integer in [0,255]
     * @param {number} g Green value, integer in [0,255]
     * @param {number} b Blue value, integer in [0,255]
     * @returns {number} A 24 bit integer
     */
    static rgbToInt24(r, g, b) {
        return r * 256 * 256 + g * 256 + b
    }

    /**
     * As above with min/scale
     * @param {number} min The min return value
     * @param {number} scale The scale factor
     * @returns {number} A 24 bit integer
     */
    static rgbScaleFunction(min, scale) {
        return (r, g, b) => min + rgbToInt24(r, g, b) * scale
        // return (r, g, b) => min + (r * 256 * 256 + g * 256 + b) * scale
    }

    // Constructor args: (img, rgbToData, ArrayType)
    // where rgbToData(r,g,b) returns a number for the dataset.
    /**
     * Create a {@link DataSet} from image pixel data
     * @param {Image} img Any "imagable" object that can be drawn to a canvas
     * @param {function} rgbToData Fnction converting 3 r,g,b bytes to a number
     * @param {constructor} ArrayType A TypedArray or Array. (default Float32)
     */
    constructor(
        img,
        rgbToData = RGBDataSet.rgbToInt24,
        ArrayType = Float32Array
    ) {
        // const [width, height] = util.imageSize(img)
        const { width, height } = img
        super(width, height, new ArrayType(width * height))
        // super(img.width, img.height, new ArrayType(img.width * img.height))

        // Not used or defined anywhere!
        // if (Array.isArray(rgbToData))
        //     rgbToData = RGBDataSet.newRgbDataFunction(rgbToData)

        // const ctx = util.createCtx(img.width, img.height)
        // util.fillCtxWithImage(ctx, img)
        const ctx = util.imageToCtx(img)
        const imgData = util.ctxImageData(ctx)

        const convertedData = this.data
        for (var i = 0; i &lt; convertedData.length; i++) {
            const r = imgData.data[4 * i]
            const g = imgData.data[4 * i + 1]
            const b = imgData.data[4 * i + 2]
            convertedData[i] = rgbToData(r, g, b)
        }
    }
}

export default RGBDataSet
</code></pre></article></section><footer class="footer" id="PeOAagUepe"><div class="wrapper">AgentScript version: 0.10.20 using clean-jsdoc-theme</div></footer></div></div></div><div class="search-container" id="PkfLWpAbet" style="display:none"><div class="wrapper" id="iCxFxjkHbP"><button class="icon-button search-close-button" id="VjLlGakifb" aria-label="close search"><svg><use xlink:href="#close-icon"></use></svg></button><div class="search-box-c"><svg><use xlink:href="#search-icon"></use></svg> <input type="text" id="vpcKVYIppa" class="search-input" placeholder="Search..." autofocus></div><div class="search-result-c" id="fWwVHRuDuN"><span class="search-result-c-text">Type anything to view search result</span></div></div></div><div class="mobile-menu-icon-container"><button class="icon-button" id="mobile-menu" data-isopen="false" aria-label="menu"><svg><use xlink:href="#menu-icon"></use></svg></button></div><div id="mobile-sidebar" class="mobile-sidebar-container"><div class="mobile-sidebar-wrapper"><a href="/" class="sidebar-title sidebar-title-anchor">Home</a><div class="mobile-nav-links"><div class="navbar-item"><a id="github-mobile" href="https://github.com/backspaces/agentscript" target="">Github</a></div><div class="navbar-item"><a id="AgentScript-mobile" href="https://code.agentscript.org" target="">AgentScript.org</a></div><div class="navbar-item"><a id="npm-mobile" href="https://www.npmjs.com/package/agentscript" target="">npm</a></div><div class="navbar-item"><a id="unpkg-mobile" href="https://unpkg.com/browse/agentscript/" target="">unpkg</a></div></div><div class="mobile-sidebar-items-c"><div class="sidebar-section-title with-arrow" data-isopen="false" id="sidebar-classes"><div>Classes</div><svg><use xlink:href="#down-icon"></use></svg></div><div class="sidebar-section-children-container"><div class="sidebar-section-children"><a href="AgentArray.html">AgentArray</a></div><div class="sidebar-section-children"><a href="AgentList.html">AgentList</a></div><div class="sidebar-section-children"><a href="AgentSet.html">AgentSet</a></div><div class="sidebar-section-children"><a href="Animator.html">Animator</a></div><div class="sidebar-section-children"><a href="DataSet.html">DataSet</a></div><div class="sidebar-section-children"><a href="GUI.html">GUI</a></div><div class="sidebar-section-children"><a href="GeoDataSet.html">GeoDataSet</a></div><div class="sidebar-section-children"><a href="Keyboard.html">Keyboard</a></div><div class="sidebar-section-children"><a href="Link.html">Link</a></div><div class="sidebar-section-children"><a href="Links.html">Links</a></div><div class="sidebar-section-children"><a href="Model.html">Model</a></div><div class="sidebar-section-children"><a href="Model3D.html">Model3D</a></div><div class="sidebar-section-children"><a href="Mouse.html">Mouse</a></div><div class="sidebar-section-children"><a href="Patch.html">Patch</a></div><div class="sidebar-section-children"><a href="Patches.html">Patches</a></div><div class="sidebar-section-children"><a href="RGBDataSet.html">RGBDataSet</a></div><div class="sidebar-section-children"><a href="ThreeDraw.html">ThreeDraw</a></div><div class="sidebar-section-children"><a href="Turtle.html">Turtle</a></div><div class="sidebar-section-children"><a href="Turtle3D.html">Turtle3D</a></div><div class="sidebar-section-children"><a href="Turtles.html">Turtles</a></div><div class="sidebar-section-children"><a href="TwoDraw.html">TwoDraw</a></div><div class="sidebar-section-children"><a href="World.html">World</a></div></div><div class="sidebar-section-title with-arrow" data-isopen="false" id="sidebar-modules"><div>Modules</div><svg><use xlink:href="#down-icon"></use></svg></div><div class="sidebar-section-children-container"><div class="sidebar-section-children"><a href="module-src_geojson.html">src/geojson</a></div><div class="sidebar-section-children"><a href="module-src_gis.html">src/gis</a></div><div class="sidebar-section-children"><a href="module-src_utils.html">src/utils</a></div></div><div class="sidebar-section-title with-arrow" data-isopen="false" id="sidebar-tutorials"><div>Tutorials</div><svg><use xlink:href="#down-icon"></use></svg></div><div class="sidebar-section-children-container"><div class="sidebar-section-children"><a href="tutorial-1 - 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