JSFiddle - React, Tailwind, and code Playground

by jihyng_hd

HTML

<script src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/1.2.1/lodash.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/1.5.0/fabric.min.js"></script>
<canvas id="c" width="400" height="400"></canvas>

CSS

#c {
    border:1px solid #ccc;
}

JavaScript

var img01URL = 'https://www.google.com/images/srpr/logo4w.png';
/* var img02URL = 'http://fabricjs.com/lib/pug.jpg';
 */
var canvas = new fabric.Canvas('c');

// Note the use of the `originX` and `originY` properties, which we set
// to 'left' and 'top', respectively. This makes the math in the `clipTo`
// functions a little bit more straight-forward.
/* var clipRect1 = new fabric.Rect({
    originX: 'left',
    originY: 'top',
    left: 180,
    top: 10,
    width: 200,
    height: 200,
    fill: 'yellow',
    stroke: 'black',
    strokeWidth: 2,
    selectable: false
});
 */// We give these `Rect` objects a name property so the `clipTo` functions can
// find the one by which they want to be clipped.
/* clipRect1.set({
    clipFor: 'pug'
});
canvas.add(clipRect1);
 */
var clipRect2 = new fabric.Rect({
    originX: 'left',
    originY: 'top',
    left: 10,
    top: 10,
    width: 150,
    height: 150,
    fill: 'rgba(255,115,0,.5)',
    stroke: 'black',
    strokeWidth: 2,
    selectable: false
});
// We give these `Rect` objects a name property so the `clipTo` functions can
// find the one by which they want to be clipped.
clipRect2.set({
    clipFor: 'logo'
});
canvas.add(clipRect2);

function findByClipName(name) {
    return _(canvas.getObjects()).where({
            clipFor: name
        }).first()
}

// Since the `angle` property of the Image object is stored 
// in degrees, we'll use this to convert it to radians.
/* function degToRad(degrees) {
    return degrees * (Math.PI / 180);
} */

var clipByName = function (ctx) {
    var clipRect = findByClipName(this.clipName);
    var scaleXTo1 = (1 / this.scaleX);
    var scaleYTo1 = (1 / this.scaleY);
    ctx.save();
    ctx.translate(0,0);
    //ctx.rotate(degToRad(this.angle * -1));
    ctx.scale(scaleXTo1, scaleYTo1);
    ctx.beginPath();
    ctx.rect(
        clipRect.left - this.left,
        clipRect.top - this.top,
        clipRect.width,
        clipRect.height
    );
    ctx.closePath();
   ...