FabricJS ClipTo为组等多个对象发出问题 [英] FabricJS ClipTo Issue for multiple objects like group

问题描述

我的代码是

我从红色虚线框中获取值并应用于生成多个蒙版的剪辑

I am taking values from the red dotted box and apply to clip where multiple mask are generating

我的问题是它取得所有属性但不是所有属性的轮换

My issue is its taking all properties but not rotation for all

canvas.clipTo = function (ctx) {

    ctx.beginPath();
    for (var i = 0; i < totalPrintArea; i++) {
        ctx.save();
        ctx.fillStyle = 'rgba(51,51,51,0)';
        ctx.rect(clipLft[i], clipTp[i], clipW[i], clipH[i], 'rgba(51,51,51,1)', clipRtn[i]);
        ctx.stroke();
        ctx.restore();
    }

    ctx.closePath();
    ctx.clip();
    canvas.calcOffset();
};
canvas.renderAll();

我想旋转所有矩形

我只是得到一些代码来改变剪辑的旋转，如ctx.rotate（50）;但是不会起作用，因为我想用他们自己的值进行全部旋转

I just get some code to change the rotation for the clip like ctx.rotate(50); but will not work as i want to make all rotate with their own values

请指导我同样的

推荐答案

在原始的fabricJS github项目中，我看到了评论： https://github.com/kangax/fabric.js/issues/932#issuecomment-27223912

On the original fabricJS github project I saw the comment: https://github.com/kangax/fabric.js/issues/932#issuecomment-27223912

并决定我需要防止一直制作ctx.beginPath：

and decided that I need to prevent making ctx.beginPath all the time:

canvas.clipTo = function(ctx) { 
var skip = false;
// Workaround to make possible 
// making clipTo with 
// fabric.Group 
var oldBeginPath = ctx.beginPath;
ctx.beginPath = function() {
if (!skip) {
  oldBeginPath.apply(this, arguments);
  skip = true;
  setTimeout(function() {
    skip = false;
  }, 0);
}
}
group.render(ctx)
};

您可以看到我所描述问题的解决方法：
https://jsfiddle.net/freelast/6o0o07p7/

You can see my workaround to the problem described: https://jsfiddle.net/freelast/6o0o07p7/

解决方法并不完美，但希望它会对某人有所帮助。

The workaround is not perfect, but hope it will help somebody.

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