js怎么将图片转成二进制数据 base 是什么进制
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function convertImgToBase(url, callback, outputFormat){
var canvas = document.createElement('CANVAS'),
ctx = canvas.getContext('2d'),
img = new Image;
img.crossOrigin = 'Anonymous';
img.onload = function(){
canvas.height = img.height;
canvas.width = img.width;
ctx.drawImage(img,0,0);
var dataURL = canvas.toDataURL(outputFormat || 'image/png');
callback.call(this, dataURL);
canvas = null;
};
img.src = url;
}
//图片地址
var imagePath='image.png';
convertImgToBase(imagePath, function(baseImg){
// BaseDataURL
});
