使用平滑结果（子像素动画）动画化CSS背景位置 [英] Animate CSS background-position with smooth results (sub-pixel animation)

问题描述

我试图动画的div的背景位置，慢慢，但没有它的动作。您可以在这里查看我目前努力的结果：

I'm trying to animate the background-position of a div, slowly, but without it having jerky movement. You can see the result of my current efforts here:

http：// jsfiddle .net / 5pVr4 / 2 /

@-webkit-keyframes MOVE-BG {
    from {
        background-position: 0% 0%
    }
    to { 
        background-position: 187% 0%
    }
}

#content {
    width: 100%;
    height: 300px;
    background: url(http://www.gstatic.com/webp/gallery/1.jpg) 0% 0% repeat;
    text-align: center;
    font-size: 26px;
    color: #000;

    -webkit-animation-name: MOVE-BG;
    -webkit-animation-duration: 100s;
    -webkit-animation-timing-function: linear;
    -webkit-animation-iteration-count: infinite;
}

我已经在这个小时，没有找到任何动画缓慢而平滑地在子像素级。我当前的示例是从此页面上的示例代码： http://css-tricks.com/parallax-background- css3 /

I have been at this for hours and can't find anything that will animate slowly and smoothly at a sub-pixel level. My current example was made from the example code on this page: http://css-tricks.com/parallax-background-css3/

在此页面的translate（）示例中可以看到我所处理的动画的平滑度：

The smoothness of animation I'm after can be seen on this page's translate() example:

http://css-tricks.com/tale-of-animation-performance/

如果不能使用background-position，是否有一种方法来伪造具有多个div的重复背景，并使用translate？ / p>

If it can't be done with the background-position, is there a way to fake the repeating background with multiple divs and move those divs using translate?

推荐答案

检查此示例：

http://jsfiddle.net/5pVr4/4/

<div id="content">Foreground content
  <div class="bg"></div>
</div>

@-webkit-keyframes MOVE-BG {
   from {
     -webkit-transform: translateX(0);
   }
   to { 
     -webkit-transform: translateX(-187%);
   }
}

#content {
  height: 300px;
  text-align: center;
  font-size: 26px;
  color: #000;
  position:relative;
}

.bg{
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  z-index: -1;
  background: url(http://www.gstatic.com/webp/gallery/1.jpg) 0% 0% repeat;

  -webkit-animation-name: MOVE-BG;
  -webkit-animation-duration: 100s;
  -webkit-animation-timing-function: linear;
  -webkit-animation-iteration-count: infinite;
}

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