This is not so much about the technique itself, as that thas been documented many times over the years, but about an easy way to handle the task of combining the images.
The WhyNormally for each image on a webpage a separate request to the webserver is required, each taking as much as a hundred millisecond. Does not sound much, but can add up fast.
The HowThere is an easy way to overcome this by combining images into one single image and address the single images using CSS.
CSS for 1st image in row:background-image : url(combined.png);background-position : 0px -16px;
CSS for 2nd image in row:background-image : url(combined.png);background-position : 0px -32px;
Some more resources dealing with the technique itself:
http://www.alistapart.com/articles/slidingdoors2/ http://wellstyled.com/css-nopreload-rollovers.html http://www.websiteoptimization.com/speed/tweak/combine/ http://www.quate.net/newsnet/read.php?id=48
The toolI have been using this technique for some time now and always searched for a tool that would help me combine those images easily. That is why I decided to build my own, currently called pzImageCombine :)
Sure there are many options to do that:– Online with php (using GD, ImageMagick…) – Using Photoshop (photoshop actions) or similiar image applications
None of these really done it for me in the past.
This small tool allows you to choose an image directory and combine all png images into one single image. Its still in its alpha stage and far from feature complete ;)
Get in touch
I am a full-stack developer. My expertise include:
I love programming, design and know my way around server architecture as well. I would never feel complete, with one of these missing.
I have a broad range of interests, that’s why I constantly dive into new technologies and expand my knowledge where ever required. Technologies are evolving fast and I enjoy using the latest.
Apart from that, I am a peace loving guy who tries to have people around him that think the same. I truly believe in the principle: “If you help someone, someone will help you, when you need it."