有没有办法在画布中绘制损坏的图像?

时间:2016-08-25 07:30:34

标签: javascript html5 html5-canvas

我正在尝试在画布上绘制图像。我使用的图像是从服务器获取的base64字符串。出于测试目的,我在调试时将映像保存在客户端和服务器的磁盘上。图像保存得很好。在画布中绘图时,图像不会在Chrome和Firefox中呈现。但它在IE 11中工作正常。有没有办法让图像在所有浏览器中绘制。

var base64String = "data:image/png;base64,SUkqANZ1AQAAEbQhURQh0dUQ6mh0dHQ62ao6GIEQkpodHSEOqKiHXodDqaoh1NOqKaOjo6HU0dUQ6mqIdeh16dSUJQqJCmh0hUR0OvQ6HU0OqIdenXodTQ69DqidTVEdOpodIXIdDr1RDokXIdeh0OuQ6HXodDr0Oh16HQ6oh16HQ6mh1NDqioi6XS0OqKidcnXp16HTr0OqIdHQ69Dodch1PHX469D1EOvQ6HU0OqIdch0hUQ2h0dF0DVEOqI6HS2tgiHQ65Do6Qh1NDqiQqIdHU0OhiOhCHU0dOqL0OpqiHXodDpe0XR0OvQ6QqIdHVE69DqaHXpOADuamqIujo6IR1t1RHVEhHR0dBqiOi6OkI6BobS8IQgRF1RHSEDR0dA0hNypCEOqIhAilqtlCS1uEDSEDQmhpURCmh0XR1sYqI6Bo6og0NI6QkJCLoGhpSLpCGJCEJCQjoQh0dIVEdBEDRmACU.." //only few of the string is shared
function drwImage(base64String) {
var canvas = document.createElement('canvas');
var context = canvas.getContext('2d');
var img = new Image();
img.onload=function(){
    context.drawImage(img, 0, 0, 1, 1);
}
img.src = base64String;
}

提前感谢您的帮助。

1 个答案:

答案 0 :(得分:2)

看似与序列化图片相关的内容,正如您在下面的代码段中看到的,它适用于Chrome,我使用了online encoder。 正如您可以阅读here,数据库几乎得到支持。



  var base64String = "data:image/jpeg;base64,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" //only few of the string is shared

   drwImage(base64String);


function drwImage(b) {
    var canvas = document.createElement('canvas');
    var context = canvas.getContext('2d');
    var img = new Image();
    img.onload = function() {
      console.log('load')
      context.drawImage(img, 0, 0, 1, 1);
      document.body.appendChild(img);
    }
    img.onerror = function() {
      console.log('error')
    }
    img.src = b;
  }