Scaling down a retina image sprite using CSS: A step-by-step guide

Struggling with loading retina images? You're not alone. Many web developers face the challenge of scaling down high-resolution images effectively. Take, for example, two image sprites: one normal and one retina. The issue arises when you need to adjust the size of the retina image to match the normal one.

.home {
    background: url('../images/buttonSprite.png') -49px -52px;
    width: 43px;
    height: 43px;
}
@media all and (-webkit-min-device-pixel-ratio: 2) {
    .home {
        background: url('../images/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="563423222239380526243f223316642e78263831">[email protected]</a>') no-repeat -79px -113px !important;
        -webkit-background-size:43px 43px;
    }
}

If you're scratching your head over how to tackle this issue, you're certainly not alone. But fret not, as there are solutions out there waiting to be discovered!

Answer №1

Here is a quick solution for the background image:

.home {
    background: url('http://img580.imageshack.us/img580/9284/buttonsprite.png') no-repeat -49px -53px;
    width: 43px;
    height: 43px;
}

@media all and (-webkit-min-device-pixel-ratio: 1.5), all and (-moz-min-device-pixel-ratio: 1.5), all and (-o-min-device-pixel-ratio: 3/2), all and (min-device-pixel-ratio: 1.5) {
    .home {
        background: url('http://img90.imageshack.us/img90/5624/buttonsprite2x.png') no-repeat -39px -56px;
        background-size: 200px 496px;
    }
}

I opted for a pixel-ratio of 1.5 as it is commonly used across various devices. Additionally, I made sure to include other vendor prefixes.

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