单击按钮时图像消失

Question

Why does the image disappear when I click button Rotate Anti-clockwise and Rotate clock-clockwise?

https://plnkr.co/edit/YFFx7oWnH1V2ppmtZWxW?p=preview

function drawImage() {
     clear();
    element.save();
    element.scale(currentScale, currentScale);
    element.rotate(currentAngle * Math.PI / 180);
    element.drawImage(image, canvas.width/2/currentScale - image.width/2, canvas.height/2/currentScale - image.height/2);
    element.restore();
}

any update ?

Answer 1

check the below link it is working

click this link http://jsfiddle.net/sreenivas644/CPKmN/576