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Fabric.js Image transparentCorners屬性用法及代碼示例


Fabric.js是一個JavaScript庫,用於處理畫布。 canvas圖像是用於創建圖像實例的fabric.js類之一。畫布圖像表示圖像是可移動的,可以根據需要進行拉伸。 transparentCorners屬性用於設置角是否透明。

方法:首先導入fabric.js庫。導入庫後,在body標簽中創建一個畫布塊,其中將包含圖像。此後,初始化由Fabric.JS提供的Canvas和圖像類的實例,並使用transparentCorners屬性設置角是否透明。之後,在畫布上渲染圖像。

用法:

fabric.Image(image, {
    transparentCorners:Boolean
});

參數:該函數采用上述和以下描述的單個參數:

  • transparentCorners:此參數采用布爾值來設置畫布圖像的透明度。

:此示例使用FabricJS設置畫布圖像的transparentCorners屬性,如下例所示:



HTML

<!DOCTYPE html>  
<html>  
  
<head>  
    <!-- Adding the FabricJS library -->
    <script src=  
"https://cdnjs.cloudflare.com/ajax/libs/fabric.js/3.6.2/fabric.min.js">  
    </script>  
</head>  
  
<body>  
    <h1 style="color:green;">  
        GeeksforGeeks  
    </h1>  
  
    <b>  
        Fabric.js | Image transparentCorners Property  
    </b>  
      
    <canvas id="canvas" width="400" height="300"
        style="border:2px solid #000000">  
    </canvas>  
  
    <img src=  
"https://media.geeksforgeeks.org/wp-content/uploads/20200327230544/g4gicon.png"
        width="100" height="100" id="my-image"
        style="display:none;">  
    <br>  
  
    <button onclick="gfg()">Clickme</button>  
  
    <script>  
  
        // Creating the instance of canvas object  
        var canvas = new fabric.Canvas("canvas");  
  
        // Getting the image  
        var img = document.getElementById('my-image');  
  
        // Creating the image instance  
        var geeks = new fabric.Image(img, {  
        });  
  
        function gfg() {  
            geeks = new fabric.Image(img, {   
               transparentCorners:true 
            });  
            canvas.clear();  
  
            // Rendering the image to canvas  
            canvas.add(geeks);  
  
            canvas.centerObject(geeks);  
        }  
        canvas.add(geeks);  
        canvas.centerObject(geeks);  
    </script>  
</body>  
  
</html>

輸出:

例:本示例使用FabricJS設置畫布圖像的transparentCorners屬性,如下例所示:

HTML

<!DOCTYPE html>  
<html>  
  
<head>  
    <!-- Adding the FabricJS library -->
    <script src=  
"https://cdnjs.cloudflare.com/ajax/libs/fabric.js/3.6.2/fabric.min.js">  
    </script>  
</head>  
  
<body>  
    <h1 style="color:green;">  
        GeeksforGeeks  
    </h1>  
  
    <b>  
        Fabric.js | Image transparentCorners Property  
    </b>  
      
    <canvas id="canvas" width="400" height="300"
        style="border:2px solid #000000">  
    </canvas>  
  
    <img src=  
"https://media.geeksforgeeks.org/wp-content/uploads/20200327230544/g4gicon.png"
        width="100" height="100" id="my-image"
        style="display:none;">  
    <br>  
  
    <button onclick="gfg()">Clickme</button>  
  
    <script>  
  
        // Creating the instance of canvas object  
        var canvas = new fabric.Canvas("canvas");  
  
        // Getting the image  
        var img = document.getElementById('my-image');  
  
        // Creating the image instance  
        var geeks = new fabric.Image(img, {  
        });  
  
        function gfg() {  
            geeks = new fabric.Image(img, {   
               transparentCorners:false 
            });  
            canvas.clear();  
  
            // Rendering the image to canvas  
            canvas.add(geeks);  
  
            canvas.centerObject(geeks);  
        }  
        canvas.add(geeks);  
        canvas.centerObject(geeks);  
    </script>  
</body>  
  
</html>

輸出:




相關用法


注:本文由純淨天空篩選整理自dheerchanana08大神的英文原創作品 Fabric.js Image transparentCorners Property。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。