canvas.toDataURLWithMultiplier 不是函数

2022-01-17 00:00:00 canvas jquery javascript html5-canvas fabricjs

我正在尝试导出 4 倍于画布大小的图像.

I am trying to export an image 4x the size of the canvas one.

与

var dataURL = canvas.toDataURL();

我将图像设置为画布的大小

I get the image set to the size of the canvas

但是当我尝试时

var dataURL = canvas.toDataURLWithMultiplier(4);

我收到错误canvas.toDataURLWithMultiplier 不是函数"

I get the error "canvas.toDataURLWithMultiplier is not a function"

下面是我的函数.

$('.preview').on('click touchstart', function() {

  // save canvas image as data url (png format by default)
  canvas.isGrabMode = false;
  canvas.setZoom(1.0);
  canvas.viewportTransform = [1, 0, 0, 1, 0, 0];
  // var dataURL = canvas.toDataURL();

  var dataURL = canvas.toDataURLWithMultiplier(4);
  // so it can be saved as an image
  document.getElementById('previewImg').src = dataURL;

  canvas.renderAll();

});

推荐答案

var dataURL = canvas.toDataURL({
  format: 'png',
  multiplier: 4
});

在 toDataURL()multiplier 属性>.

Use multiplier property in toDataURL().

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