如何在fabric js中将图像添加到多边形? [英] How to add image to polygon in fabric js?

问题描述

1 当我尝试向图像中添加图像时，我正在创建具有定点的多边形多边形对象.图像不在多边形中渲染.它是从画布的起点渲染的.以下是我使用的代码.请告诉我我在哪里做错了. 感谢您的帮助！

1I am creating a polygon with definite points,when i try to add an image to the polygon object.Image is not rendering in the polygon.it is rendering from starting point of the canvas. Below is the code i used.Please tell me where i am doing wrong. Appreciate any help!Thanks

Jsfiddle链接 https://jsfiddle.net/u3bfscom/6/ 添加点并创建多边形，然后添加纹理.

Jsfiddle Link https://jsfiddle.net/u3bfscom/6/ Add Points and create polygon later add Texture.

        fabric.Image.fromURL('https://image.freepik.com/free-photo/roof-texture_21206171.jpg', function (oImg)  {
        for(var i=0;canvas.getObjects().length>i;i++)
        {
            if(canvas.getObjects()[i].name=="Polygon")
            {   
                    canvas.getObjects()[i].set(oImg);
            }
        }
        canvas.renderAll();
        });

推荐答案

得到答案.

fabric.Image.fromURL('https://image.freepik.com/free-photo/roof-texture_21206171.jpg', function (img)  {
            var patternSourceCanvas = new fabric.StaticCanvas();
            patternSourceCanvas.add(img);
            var pattern = new fabric.Pattern({
              source: function() {
                patternSourceCanvas.setDimensions({
                  width: img.getWidth(),
                  height: img.getHeight()
                });
                return patternSourceCanvas.getElement();
              },
            });
            console.log(img);
           for(var i=0;canvas.getObjects().length>i;i++)
            {
                if(canvas.getObjects()[i].name=="Polygon")
                {   
                        canvas.getObjects()[i].set("fill", pattern);
                        canvas.renderAll();
                }
            }
        });

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