dppx
说明
每像素包含点的数量(dots per pixel)
- 普通屏幕通常包含96dpi,一般将2倍于此的屏幕称之为高分屏,即大于等于192dpi的屏幕,比如Mac视网膜屏就达到了192dpi(即2dppx),打印时一般会需要更大的dpi;
- 1dppx = 96dpi
- 1dpi ≈ 0.39dpcm
- 1dpcm ≈ 2.54dpi
- 1in = 2.54cm = 25.4 mm = 101.6q = 72pt = 6pc = 96px
兼容性
IE | Firefox | Chrome | Safari | Opera | iOS Safari | Android Browser | Android Chrome |
---|---|---|---|---|---|---|---|
6.0-8.0 | 2.0-15.0 | 4.0-28.0 | 3.1-8.1 | 15.0+ | 3.2-8.1 | 2.1-4.4.4 | 18.0-29.0 |
9.0+ | 16.0+ | 29.0+ | 29.0+ |
示例
<!DOCTYPE html>
<html lang="zh-cmn-Hans">
<head>
<style>
@media screen and (min-resolution: 2dppx) {
.normal{display:none;}
}
@media screen and (min-resolution: 1dppx) and (max-resolution: 1.9dppx) {
.retina{display:none;}
}
</style>
</head>
<body>
<p class="retina">视网膜屏</p>
<p class="normal">普通屏</p>
</body>
</html>