我想使用png文件在CSS中创建遮罩,但使用的方式不同。基本上,我不希望蒙版显示下面的内容,但我希望它剪切掉下面的内容并显示其他所有内容。就像负面面具一样。重要的事实是我要遮罩背景图像。这是我想做的:
我这里有3层。第一个是视频(html),然后将点缀的背景制作成重复的背景(CSS背景),然后是遮罩-必须是png图片,因为这是徽标。我希望蒙版删除其下面的背景并显示视频。
.cont {
width: 100%;
height: 450px;
position: relative;
background: url("http://www.kamiennadlyna.pl/test/img/video-bg.jpg") no-repeat center;
}
.maska {
width: 100%;
height: 100%;
background: url("http://www.kamiennadlyna.pl/test/img/mask.png") repeat;
left: 0;
bottom: 0;
position: absolute;
text-align: center;
/*-webkit-mask-image: url("https://www.tucado.com/images/logo.png")*/
}
<div class="cont">
<video autoplay muted loop id="myVideo">
<source src="http://www.kamiennadlyna.pl/video.mp4" type="video/mp4" poster="http://www.kamiennadlyna.pl/test/img/video-bg.jpg">
</video>
<div class="maska">
</div>
</div>
答案 0 :(得分:2)
新答案
基于更新,您可以执行以下操作。想法是考虑徽标的倒置版本,在该版本中,使透明部分不透明(并使非透明部分透明),然后应用多个蒙版层以获得所需的内容。
我从旧答案中保留了相同的想法。我正在考虑徽标位于叠加层的中心:
.overlay {
--h:200px; /* height of the logo*/
--w:200px; /* width of the logo */
height:300px;
background:radial-gradient(farthest-side,black 50%,transparent 52%) 0 0/8px 8px;
-webkit-mask:
linear-gradient(#fff,#fff) top /100% calc(50% - var(--h)/2),
linear-gradient(#fff,#fff) bottom/100% calc(50% - var(--h)/2),
linear-gradient(#fff,#fff) left /calc(50.1% - var(--w)/2) 100%,
linear-gradient(#fff,#fff) right /calc(50.1% - var(--w)/2) 100%,
url(https://i.ibb.co/1zDbtJw/logo.png) center/var(--w) var(--h);
mask:
linear-gradient(#fff,#fff) top /100% calc(50% - var(--h)/2),
linear-gradient(#fff,#fff) bottom/100% calc(50% - var(--h)/2),
linear-gradient(#fff,#fff) left /calc(50% - var(--w)/2) 100%,
linear-gradient(#fff,#fff) right /calc(50% - var(--w)/2) 100%,
url(https://i.ibb.co/1zDbtJw/logo.png) center/var(--w) var(--h);
-webkit-mask-repeat:no-repeat;
mask-repeat:no-repeat;
}
body {
background:url(https://i.picsum.photos/id/44/800/800.jpg) center/cover;
}
<div class="overlay"></div>
以下是一个相关问题,用于说明如何获取徽标的新版本:https://graphicdesign.stackexchange.com/q/63635
我们也可以使用mask-composite
并保留原始徽标,这样可以更轻松地调整和更改位置。注意掩模层的顺序,这与第一个示例不同,在这里很重要:
.overlay {
height:300px;
background:radial-gradient(farthest-side,black 50%,transparent 52%) 0 0/8px 8px;
-webkit-mask:
linear-gradient(#fff,#fff),
url(https://i.ibb.co/cKBT5WQ/logo.png) center/200px 200px;
-webkit-mask-repeat:no-repeat;
-webkit-mask-composite:source-out;
mask:
linear-gradient(#fff,#fff),
url(https://i.ibb.co/cKBT5WQ/logo.png) center/200px 200px;
mask-repeat:no-repeat;
mask-composite:exclude;
}
body {
background:url(https://i.picsum.photos/id/44/800/800.jpg) center/cover;
}
<div class="overlay"></div>
旧答案
我将使用纯CSS构建此图像而无需图像:
.overlay {
height:300px;
/* the stripes */
background:repeating-linear-gradient(to right,blue 0 10px,transparent 10px 20px);
/* the mask*/
-webkit-mask:
linear-gradient(#fff,#fff) top /100% 50px,
linear-gradient(#fff,#fff) bottom/100% 50px,
linear-gradient( 235deg,transparent 10%,#fff 9%) calc(50% - 600px) 50%/1200px calc(100% - 100px),
linear-gradient(-235deg,transparent 10%,#fff 9%) calc(50% + 600px) 50%/1200px calc(100% - 100px);
-webkit-mask-repeat:no-repeat;
mask:
linear-gradient(#fff,#fff) top /100% 50px,
linear-gradient(#fff,#fff) bottom/100% 50px,
linear-gradient( 235deg,transparent 10%,#fff 9%) calc(50% - 600px) 50%/1200px calc(100% - 100px),
linear-gradient(-235deg,transparent 10%,#fff 9%) calc(50% + 600px) 50%/1200px calc(100% - 100px);
mask-repeat:no-repeat;
}
body {
background:url(https://i.picsum.photos/id/44/800/800.jpg) center/cover;
}
<div class="overlay"></div>
要理解这个难题,这里是用于具有不同颜色的蒙版的渐变:
.overlay {
height:300px;
background:
linear-gradient(blue,blue) top /100% 50px,
linear-gradient(red,red) bottom/100% 50px,
linear-gradient( 235deg,transparent 10%,green 9%)
calc(50% - 600px) 50% / 1200px calc(100% - 100px),
/* ^ this half of this ^ */
linear-gradient(-235deg,transparent 10%,purple 9%)
calc(50% + 600px) 50%/1200px calc(100% - 100px);
background-repeat:no-repeat;
}
body {
background:url(https://i.picsum.photos/id/44/800/800.jpg) center/cover;
}
<div class="overlay"></div>
这是我将使用CSS变量轻松控制三角形的另一种语法:
.overlay {
--h:200px; /* height of the triangle*/
--w:200px; /* width of the triangle */
height:300px;
/* the stripes */
background:repeating-linear-gradient(to right,blue 0 10px,transparent 10px 20px);
/* the mask*/
-webkit-mask:
linear-gradient(#fff,#fff) top /100% calc(50% - var(--h)/2),
linear-gradient(#fff,#fff) bottom/100% calc(50% - var(--h)/2),
linear-gradient(#fff,#fff) left /calc(50% - var(--w)/2) 100%,
linear-gradient(#fff,#fff) right /calc(50% - var(--w)/2) 100%,
linear-gradient(to top right,#fff 49%,transparent 50%) calc(50% - var(--w)/4) 50%/calc(var(--w)/2) var(--h),
linear-gradient(to top left ,#fff 49%,transparent 50%) calc(50% + var(--w)/4) 50%/calc(var(--w)/2) var(--h);
-webkit-mask-repeat:no-repeat;
mask:
linear-gradient(#fff,#fff) top /100% calc(50% - var(--h)/2),
linear-gradient(#fff,#fff) bottom/100% calc(50% - var(--h)/2),
linear-gradient(#fff,#fff) left /calc(50% - var(--w)/2) 100%,
linear-gradient(#fff,#fff) right /calc(50% - var(--w)/2) 100%,
linear-gradient(to top right,#fff 49%,transparent 50%) calc(50% - var(--w)/4) 50%/calc(var(--w)/2) var(--h),
linear-gradient(to top left ,#fff 49%,transparent 50%) calc(50% + var(--w)/4) 50%/calc(var(--w)/2) var(--h);
mask-repeat:no-repeat;
}
body {
background:url(https://i.picsum.photos/id/44/800/800.jpg) center/cover;
}
<div class="overlay"></div>