JS切割图片

 拼图的反运算，手动裁剪太麻烦，自动化。

 
切割
 

  竖向横向，份数 切割 清空

  

 

button_slice.addEventListener('click', function(){ slice(); });
button_slice_clear.addEventListener('click', function(){ slice_clear(); });

function slice() {
    slice_result.innerHTML = '';
    let n = Number(slice_number.value);
    let d = slice_direction.selectedIndex;
    msg.textContent = slice_direction.value + ' 切割 ' + n + ' 份';
    let canvas1 = document.createElement('canvas');
    let ctx1 = canvas1.getContext('2d');
    for (i=0; i