CSS shape-image-threshold用法及代码示例

shape-image-threshold属性用于设置将图像用于shape-outside时用于提取形状的alpha通道的阈值。

用法:

shape-image-threshold:<alpha-value>

属性值：

alpha-value：用于设置提取形状的阈值。对于该形状，将考虑大于阈值的像素。十进制值0.0到1.0可用于将阈值从完全透明设置为完全不透明。如果值超出范围，则将其限制在该范围内。

下面的示例说明shape-image-threshold属性：

范例1：在此示例中，我们将阈值设置为0.5

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        CSS | shape-image-threshold 
    </title> 
    <style> 
        .outline { 
            shape-outside:linear-gradient( 
                    to right, green, transparent); 
          
            /* shape-image-threshold effect */ 
            shape-image-threshold:0.4; 
            background-image:linear-gradient( 
                    to right, green, transparent); 
            width:300px; 
            height:130px; 
            float:left; 
        } 
    </style> 
</head> 
  
<body> 
    <center> 
        <h1 style="color:green"> 
            GeeksforGeeks 
        </h1> 
          
        <b> 
            CSS | shape-image-threshold:0.5; 
        </b> 
          
        <br><br> 
    </center> 
      
    <div class="outline"></div> 
      
    <div class="container"> 
        GeeksforGeeks is a computer science portal 
        with a huge variety of well written and 
        explained computer science and programming  
        articles, quizzes and interview questions. 
        The portal also has dedicated GATE preparation 
        and competitive programming sections. 
        <br><br>  
        GeeksforGeeks is a computer science portal 
        with a huge variety of well written and  
        explained computer science and programming 
        articles, quizzes and interview questions. 
        The portal also has dedicated GATE preparation 
        and competitive programming sections. 
    </div> 
</body> 
  
</html>

输出：

范例2：在此示例中，我们将阈值设置为0.2

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        CSS | shape-image-threshold 
    </title> 
    <style> 
        .outline { 
            shape-outside:linear-gradient(20deg, 
                rgb(77, 26, 103), transparent 80%, 
                transparent);         
              
            /* shape-image-threshold effect */ 
            shape-image-threshold:0.2; 
            background-image:linear-gradient( 
                to top, green, transparent); 
            width:300px; 
            height:125px; 
            float:left; 
        } 
    </style> 
</head> 
  
<body> 
    <center> 
        <h1 style="color:green"> 
            GeeksforGeeks 
        </h1> 
          
        <b> 
            CSS | shape-image-threshold:0.2; 
        </b> 
          
        <br><br> 
    </center> 
      
    <div class="outline"></div> 
      
    <div class="container"> 
        GeeksforGeeks is a computer science portal 
        with a huge variety of well written and 
        explained computer science and programming  
        articles, quizzes and interview questions. 
        The portal also has dedicated GATE preparation 
        and competitive programming sections. 
        <br><br>  
        GeeksforGeeks is a computer science portal 
        with a huge variety of well written and  
        explained computer science and programming 
        articles, quizzes and interview questions. 
        The portal also has dedicated GATE preparation 
        and competitive programming sections. 
    </div> 
</body> 
  
</html>

输出：

支持的浏览器：shape-image-threshold属性支持的浏览器如下所示：

谷歌浏览器
Internet Explorer 9
Firefox
Safari
Opera

相关用法

注：本文由纯净天空筛选整理自sayantanm19大神的英文原创作品 CSS | shape-image-threshold Property。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。