css属性image-redering详解_html/css_WEB-ITnose
What?
image-rendering作为现阶段还处于实验性质中的css属性,他的作用是在浏览器对图片进行比例缩放时,设置其缩放使用的算法,从而来得到我们最终想要的图片结果。而且这个属性可以应用于img,canvas和background-image中。
Note
由于该属性未得到所有浏览器的支持,本文直接在文章里应用该属性,所以阅读此文时请使用最新版本的浏览器
Usage
1 |
|
其可选的值有:
使用默认算法,即将图片色彩进行平滑缩放,不同的浏览器采用的算法不一,如:firefox 3.0后的gecko使用双线性插值(bilinear interpolation)算法
使用算法达达到在绽放时保持对比度和边缘,在加工时不平滑色彩和使用模糊
当图片放大时,单纯地去放大像素点,缩小时与auto效果一样
Demo
pixelated
我们先来放主角一!
看到了吗?这就是主角,一个大小为2*2像素的图片……
(图片君:你个鬼把我设计这么小,赶快把爷整大,不然削你!)
既然大哥发话了,小弟不能不听命,分分钟给大哥加了个width:400px
可是放大后……
(我:大哥,这还是你吗?你怎么变得这么色彩绚烂了)
(图片君:真是B了狗了!你对我做了什么)
(我:大哥,这不是我的错,是浏览器对你放大时使用了默认的算法把你的色彩平滑处理了……其实,现在还是挺好看的嘛!)
(图片君:别跟我扯犊子,给我整回来!!!!!)
大哥一怒,我连忙加点去给大家做整容手术,在它的属性里加了image-redering:pixelated
(我:这才是你嘛,大哥)
(图片君:这次不错,我还是我,是颜色不一样的烟火)
从大哥那里学到了pixelated的作用,而它在实际中的作用是怎么样的呢?
比如我有一个内容为zhiyishou.com的二维码君,它的大小为50px*50px
二维码君虽说不小,但是比变壮后的大哥小多了,二维码君也来找我想说整整容,变成大哥那样
于是,我直接把它变大,成了这样:
这……你英姿飒爽的轮廓呢?看来还是不对,思索了一下是和大哥的病一样
我二话没说,直接把刚学会的pixelated加在了二维码君的身上
这才是俊朗的二维码君嘛!!
crisp-edges
从w3c官网上请来了一位嘉宾,它来和我们演示crisp-edges的用法:
我们把嘉宾君进行放大:
这是嘉宾君在普通放大后的结果,即使用auto来做色彩平滑,我们试试在嘉宾君身上使用pixelated,看看会怎么样
嘉宾君有点不耐烦了,有事要走,赶快给它加上crisp-edges看看效果(由于各个浏览器对该属性的支持还不太统一,所以得做单独配置)
1 |
|
可以看出来嘉宾君的边缘没有像第一次那样被平滑掉,尽可能保持自己的边缘,但是整个图片做了模糊处理,所以不像上面的pixelated一样棱角分明。
这个效果可以对图片缩放时进行效果的优化,但和pixelated的应用场景不一样。
Finally
我感觉这个属性最实用的还是pixelated,对于这个属性的使用,我们不能去绝对地依赖它来实现某种效果,只能说是用它去做优化,要做到有它的参与更好,没有也不差什么,因为这个属性太新了,在chrome中出现也是chrome41,而且chrome目前还不支持crisp-edges值
1 |
|
参考
image-rendering on MDN
image-rendering on W3C
image-rendering article
Finish.

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

The official account web page update cache, this thing is simple and simple, and it is complicated enough to drink a pot of it. You worked hard to update the official account article, but the user still opened the old version. Who can bear the taste? In this article, let’s take a look at the twists and turns behind this and how to solve this problem gracefully. After reading it, you can easily deal with various caching problems, allowing your users to always experience the freshest content. Let’s talk about the basics first. To put it bluntly, in order to improve access speed, the browser or server stores some static resources (such as pictures, CSS, JS) or page content. Next time you access it, you can directly retrieve it from the cache without having to download it again, and it is naturally fast. But this thing is also a double-edged sword. The new version is online,

The article discusses using HTML5 form validation attributes like required, pattern, min, max, and length limits to validate user input directly in the browser.

Article discusses best practices for ensuring HTML5 cross-browser compatibility, focusing on feature detection, progressive enhancement, and testing methods.

This article demonstrates efficient PNG border addition to webpages using CSS. It argues that CSS offers superior performance compared to JavaScript or libraries, detailing how to adjust border width, style, and color for subtle or prominent effect

The article discusses the HTML <datalist> element, which enhances forms by providing autocomplete suggestions, improving user experience and reducing errors.Character count: 159

The article discusses the HTML <meter> element, used for displaying scalar or fractional values within a range, and its common applications in web development. It differentiates <meter> from <progress> and ex

This article explains the HTML5 <time> element for semantic date/time representation. It emphasizes the importance of the datetime attribute for machine readability (ISO 8601 format) alongside human-readable text, boosting accessibilit

The article discusses the HTML <progress> element, its purpose, styling, and differences from the <meter> element. The main focus is on using <progress> for task completion and <meter> for stati
