HTML/CSS - create alpha mask over image
Solution 1
you could do something like this for example : Example
html
<div class="photo_container">
<div class="photo">
<img src="/lakenwoods/images/mockup-photo.png" width="540" height="463" /></div>
<div class="overlay">
<div class="content">
<h1>Welcome to Lake-N-Woods Realty</h1>
<p>
We are a Diverse and Highly Effective Real Estate Company, Dedicated to Satisfying all of our Clients Needs. We Specialize in Recreational, Rural and Investment Property throughout Bemidji and North Central Minnesota.
</p>
</div>
</div>
<div class="clear">
</div>
</div>
CSS
@charset "utf-8";
/* CSS Document */
.clear {
clear:both;
}
.photo_container {
position: relative;
width: 540px;
height: 463px;
overflow:hidden;
margin: 0; padding:0;
}
.photo_container .photo {
z-index:1;
}
.photo_container .overlay {
width: 540px;
height: 463px;
background: url(/lakenwoods/images/mockup-overlay.png) no-repeat top center;
position:absolute;
bottom: 0;
left: 0;
z-index:10;
}
.photo_container .overlay .content h1 {
position:absolute;
top: 310px;
left: 34px;
font-family: Helvetica, Helvetica Neue, Arial, sans-serif;
font-size:18px;
color: #fff;
font-weight: 700;
width: 315px;
}
.photo_container .overlay .content p {
position:absolute;
top: 335px;
left: 34px;
font-family: Helvetica, Helvetica Neue, Arial, sans-serif;
font-size:12px;
color: #fff;
width: 315px;
line-height: 1.4em;
}
Solution 2
I know that you are asking specifically for a CSS/JavaScript solution, and I'm sure you have your reasons.
Nevertheless, I just wanted to throw out the simple solution of a single faded image file like you already posted in your question with no fancy programmed effects.
Solution 3
Ah — based on your comment on antyrat’s answer, your best bet is to create a PNG image that contains the effect (i.e. a semi-transparent white shape), and position it over the top of your actual image using CSS (position:absolute
and z-index
will be involved).
You can’t currently create non-square shapes using HTML and CSS alone.
Solution 4
Start with jQuery. For example see fadeIn function.
For static alpha mask over image use opacity css property:
.myimage {
filter:progid:DXImageTransform.Microsoft.Alpha(opacity=50);
-moz-opacity: 0.5;
-khtml-opacity: 0.5;
opacity: 0.5;
}
sa125
Updated on August 12, 2020Comments
-
sa125 almost 4 years
I'd like to create an effect in a site I’m building where an image is masked by an overlay. The overlay should create a “fade out” effect — I don’t actually want anything animated, but the overlay should make the image look as if it’s fading to the background colour at the edges.
Something like this: http://imgur.com/fqtc9.png
I prefer to do this with CSS/HTML/JS - not images. Any thoughts on where to start? Thanks.