如何使用Fabric.js将图像上传到画布? [英] How to upload an image to a canvas with Fabric.js?
本文介绍了如何使用Fabric.js将图像上传到画布?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我希望创建一个用户可以上传图片的过程,然后在使用Fabric.js的Canvas中使用一些按钮在浏览器中编辑它们 - 使用Fabric.js添加一些效果。
I want that to create a process where the users can upload their images and then edit them in the browser in a Canvas with Fabric.js using some buttons -wich uses Fabric.js to add some effects-.
我无法使其发挥作用。我的HTML是:
I can't make it work. My HTML is:
<form id="uploadImg" runat="server">
<input type="file" id="uploadedImg"/>
</form>
<canvas id="canvas"></canvas>
Javascript如下:
The Javascript is the following:
var canvas = new fabric.Canvas('canvas');
canvas.setHeight(480);
canvas.setWidth(640);
$('#uploadedImg').change(function () {
var imgData = $(this).files[0];
fabric.util.loadImage(imgData, function(img) {
var oImg = new fabric.Image(img);
oImg.scale(0.2).set({
left: 100,
top: 100,
});
canvas.add(oImg);
});
});
推荐答案
document.getElementById('imgLoader').onchange = function handleImage(e) {
var reader = new FileReader();
reader.onload = function (event){
var imgObj = new Image();
imgObj.src = event.target.result;
imgObj.onload = function () {
var image = new fabric.Image(imgObj);
image.set({
angle: 0,
padding: 10,
cornersize:10,
height:110,
width:110,
});
canvas.centerObject(image);
canvas.add(image);
canvas.renderAll();
}
}
reader.readAsDataURL(e.target.files[0]);
}
这篇关于如何使用Fabric.js将图像上传到画布?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文