如何在 <div> 中调整背景图像的亮度而不影响前景项目? [复制]
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【中文标题】如何在 <div> 中调整背景图像的亮度而不影响前景项目? [复制]【英文标题】:How to adjust the brightness of a background image in a <div> without it affecting the foreground items? [duplicate] 【发布时间】:2019-02-07 21:38:46 【问题描述】:让我先声明一下,我是 html 和 CSS 的菜鸟。话虽如此,我的网站的一部分有这个 JS Fiddle:https://jsfiddle.net/rharrison2641/sb3rzm9t/2/
代码。)
HTML:
<section class="FutureGoals">
<div class="BlizzBox">
<div class="Blizzard1">
<img src="https://s8.postimg.cc/5avnnvurp/Blizz_Pop.png" class="BlizzPop">
</div>
</div>
</section>
CSS:
.FutureGoals
height: 100vh;
overflow: hidden;
.BlizzBox
height: 100vh;
overflow: hidden;
.Blizzard1
background: url(https://s8.postimg.cc/g96x696k3/Blizzard.jpg);
background-repeat: no-repeat;
background-position: 75%;
background-attachment: fixed;
height: 100%;
width: 100%;
transition: all .5s ease;
-moz-transition: all .5s ease;
-ms-transition: all .5s ease;
-webkit-transition: all .5s ease;
-o-transition: all .5s ease;
webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
.Blizzard1:hover
-webkit-filter: brightness(50%);
-moz-transform: scale(1.1);
-webkit-transform: scale(1.1);
-o-transform: scale(1.1);
-ms-transform: scale(1.1);
transform: scale(1.1);
-ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand')";
filter: progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand');
.BlizzPop
position: relative;
height: auto;
width: 30%;
left: 25%;
top: 9%;
z-index: 1;
transition: all .7s ease;
-moz-transition: all .7s ease;
-ms-transition: all .7s ease;
-webkit-transition: all .7s ease;
-o-transition: all .7s ease;
.Blizzard1:hover .BlizzPop
z-index: 1;
-moz-transform: scale(1.5);
-webkit-transform: scale(1.5);
-o-transform: scale(1.5);
-ms-transform: scale(1.5);
transform: scale(1.5);
-ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand')";
filter: progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand');
基本上我要做的是使背景图像 Blizzard.jpg 变暗,但导致 Blizzard.png 徽标不会变暗并保留其白色。就目前而言,一切正常,但标志变暗为浅灰色。我已经尝试将图像与背景图像一起放在 div 之外,但这只会导致窗口大小调整非常糟糕。有人可以为此提出解决方法吗?这几天我一直在尝试,所以任何解决方案或帮助将不胜感激。
【问题讨论】:
【参考方案1】:您可以将rgba()
渐变悬停在background-image
上以使其变暗。
background:
linear-gradient(0deg, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)),/* the gradient on top, adjust color and opacity to your taste */
url(https://s8.postimg.cc/g96x696k3/Blizzard.jpg);
下面的演示
.FutureGoals
height: 100vh;
overflow: hidden;
.BlizzBox
height: 100vh;
overflow: hidden;
.Blizzard1
background: url(https://s8.postimg.cc/g96x696k3/Blizzard.jpg);
background-repeat: no-repeat;
background-position: 75%;
background-attachment: fixed;
height: 100%;
width: 100%;
transition: all .5s ease;
-moz-transition: all .5s ease;
-ms-transition: all .5s ease;
-webkit-transition: all .5s ease;
-o-transition: all .5s ease;
webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
.Blizzard1:hover
background: linear-gradient(0deg, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url(https://s8.postimg.cc/g96x696k3/Blizzard.jpg);
background-repeat: no-repeat;
background-position: 75%;
background-attachment: fixed;
webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
-moz-transform: scale(1.1);
-webkit-transform: scale(1.1);
-o-transform: scale(1.1);
-ms-transform: scale(1.1);
transform: scale(1.1);
-ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand')";
filter: progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand');
.BlizzPop
position: relative;
height: auto;
width: 30%;
left: 25%;
top: 9%;
z-index: 1;
transition: all .7s ease;
-moz-transition: all .7s ease;
-ms-transition: all .7s ease;
-webkit-transition: all .7s ease;
-o-transition: all .7s ease;
.Blizzard1:hover .BlizzPop
z-index: 1;
-moz-transform: scale(1.5);
-webkit-transform: scale(1.5);
-o-transform: scale(1.5);
-ms-transform: scale(1.5);
transform: scale(1.5);
-ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand')";
filter: progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand');
<section class="FutureGoals">
<div class="BlizzBox">
<div class="Blizzard1">
<img src="https://s8.postimg.cc/5avnnvurp/Blizz_Pop.png" class="BlizzPop">
</div>
</div>
</section>
https://jsfiddle.net/sb3rzm9t/8/
或者设置一个inset
box-shadow
也带有一个rgba()
颜色(过渡在盒子阴影上也很有效)
box-shadow:inset 0 0 0 150vw rgba(0,0,0,0.5);/* hudge without blur to cover the whole container */
下面的演示
.FutureGoals
height: 100vh;
overflow: hidden;
.BlizzBox
height: 100vh;
overflow: hidden;
.Blizzard1
background: url(https://s8.postimg.cc/g96x696k3/Blizzard.jpg);
background-repeat: no-repeat;
background-position: 75%;
background-attachment: fixed;
height: 100%;
width: 100%;
transition: all .5s ease;
-moz-transition: all .5s ease;
-ms-transition: all .5s ease;
-webkit-transition: all .5s ease;
-o-transition: all .5s ease;
webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
.Blizzard1:hover
box-shadow:inset 0 0 0 150vw rgba(0,0,0,0.5);
-moz-transform: scale(1.1);
-webkit-transform: scale(1.1);
-o-transform: scale(1.1);
-ms-transform: scale(1.1);
transform: scale(1.1);
-ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand')";
filter: progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand');
.BlizzPop
position: relative;
height: auto;
width: 30%;
left: 25%;
top: 9%;
z-index: 1;
transition: all .7s ease;
-moz-transition: all .7s ease;
-ms-transition: all .7s ease;
-webkit-transition: all .7s ease;
-o-transition: all .7s ease;
.Blizzard1:hover .BlizzPop
z-index: 1;
-moz-transform: scale(1.5);
-webkit-transform: scale(1.5);
-o-transform: scale(1.5);
-ms-transform: scale(1.5);
transform: scale(1.5);
-ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand')";
filter: progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand');
<section class="FutureGoals">
<div class="BlizzBox">
<div class="Blizzard1">
<img src="https://s8.postimg.cc/5avnnvurp/Blizz_Pop.png" class="BlizzPop">
</div>
</div>
</section>
https://jsfiddle.net/sb3rzm9t/9/
【讨论】:
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