添加“水印” CSS效果？ [英] Add "Watermark" effect with CSS?

问题描述

我在div中有一个图片。我需要添加水印效果，或基本上另一个图像，over图像的div。我怎么能这样用css？

I have an image in a div. I need to add a watermark effect, or basically another image, overtop the image the div. How can I do this with css?

示例代码：

<div id="image">
</div>

css：

#image {
   background:url(images/images.png) no-repeat;
}

推荐答案

要满足您的要求并使用图片：

To meet your requirements and use an image:

<div id="image">
    <img src="path/to/watermarking_image.png" alt="..." />
</div>

使用以下CSS：

#image {
/* the image you want to 'watermark' */
height: 200px; /* or whatever, equal to the image you want 'watermarked' */
width: 200px; /* as above */
background-image: url(path/to/image/to/be/watermarked.png);
background-position: 0 0;
background-repeat: no-repeat;
position: relative;
}

#image img {
/* the actual 'watermark' */
position: absolute;
top: 0; /* or whatever */
left: 0; /* or whatever, position according to taste */
opacity: 0.5; /* Firefox, Chrome, Safari, Opera, IE >= 9 (preview) */
filter:alpha(opacity=50); /* for <= IE 8 */
}

   +--------------+--------------+
   |              |              |
   | 'watermark'  |              |
   |              |        __    |
   +--------------+       /  \   |
   |                     (    )  |
   |               /\     \  /   |
   |              /  \     ||    |   <-- Picture. Of...something. O_o
   | /\          /    \    ||    |
   |/  \________/      \_()||_()(|
   +-----------------------------+

另一种方法，假设你想要'watermark' 一个字是使用字：

The alternative way, assuming all you want to 'watermark' with is 'one word,' is to use words:

<div id="image">
    <p>Watermark text</p>
</div>

以及以下CSS：

#image {
/* the image you want to 'watermark' */
height: 200px; /* or whatever, equal to the image you want 'watermarked' */
width: 200px; /* as above */
background-image: url(path/to/image/to/be/watermarked.png);
background-position: 0 0;
background-repeat: no-repeat;
position: relative;
}

#image p {
/* the actual 'watermark' */
position: absolute;
top: 0; /* or whatever */
left: 0; /* or whatever, position according to taste */
opacity: 0.5; /* Firefox, Chrome, Safari, Opera, IE >= 9 (preview) */
filter:alpha(opacity=50); /* for <= IE 8 */
}

   +--------------+--------------+
   |              |              |
   |  watermark   |              |
   |    text      |        __    |
   +--------------+       /  \   |
   |                     (    )  |
   |               /\     \  /   |
   |              /  \     ||    |   <-- Picture. Of...something. O_o
   | /\          /    \    ||    |
   |/  \________/      \_()||_()(|
   +-----------------------------+

我意识到这个问题可能是你的满意答案，希望这对你有一些用处，即使只作为一般信息。

I realise that this question was probably answered to your satisfaction, but I hope this is of some use to you, even only as general information.

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