默认CSS滤镜值的亮度和对比度 [英] Default CSS filter values for brightness and contrast

问题描述

最近我将Chrome更新为v.26，使用HTML5 canvas显示的图片不再显示。因为我发现我不得不改变亮度和对比度。

Recently I've updated Chrome to v.26 and pictures which were displayed using HTML5 canvas were not visible anymore. As I found I had to change to brightness and contrast.

CSS滤镜的BC值如何根据浏览器引擎而不同？

How are the values for BC for CSS filters different depending on the browser engine?

默认值：

Brightness:  0; contrast 100: Firefox ? 
Brightness:100; contrast:100: Chrome ?

我发现它实际上是Chrome的一个错误修复： https://code.google.com/p/chromium/issues/detail?id=168004

As I found out it is actually a bug fix for Chrome: https://code.google.com/p/chromium/issues/detail?id=168004

推荐答案

我发现这一点，它一定会帮助你。
语法是这样的。

I found this and it will certainly help you. The syntax is something like this.

.thing_you_want_to_filter {
  /*
    these are all default values, note that hue-rotate and blur have units.
    You'll also need to include the vendor prefixes.
  */
  filter: grayscale(0);
  filter: sepia(0);
  filter: saturate(1);
  filter: hue-rotate(0deg);
  filter: invert(0);
  filter: opacity(1);
  filter: brightness(0);
  filter: contrast(1);
  filter: blur(0px);

  /* Drop shadow has the same syntax as box-shadow – see below for why it's amazing! */
  filter: drop-shadow(5px 5px 10px #ccc);
}

Chrome 18.0+和Safari 6+是唯一支持此功能的浏览器。
对于版本6下的Safari，它将是这样：

Chrome 18.0+ and Safari 6+ are the only browsers that support this. For Safari under version 6 it would be like this:

.img
 {
  -webkit-filter:contrast(100%); /* play with the percentages */
  -webkit-filter:brightness(100%);
 }

您可以自己读取来源

http://net.tutsplus.com/ tutorials / html-css-techniques / say-hello-to-css3-filters /
http：// css3 .bradshawenterprises.com / filters /

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