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Noemi Millman: Triopter: Category Archives for "Featured"

Introducing Usertrack: Drupal Module to Track User Login / Logout Status

As part of a recent project for the excellent Nolej Studios, I needed a way to track which Drupal users are currently logged in — this is surprisingly not really possible using the Drupal core, and even more surprisingly not supported by any contrib modules than I could identify.

The obvious solution was to code my own module, and here it is: usertrack. You can also check it out from Subversion at http://svn.triopter.com/drupal/usertrack/trunk/usertrack/ .

Usertrack includes simple Views integration for filtering, sorting, and annotating your User view with login status and last logout date. Please read the …

Understand Image Formats, Part 2: JPEG, GIF, TIFF, PNG, and BMP — the Raster Formats

As we learned in Part 1, there are two major types of image formats, vector and raster. A raster image is made up of a grid of pixels.

But there are several different raster formats. What’s the difference between them?

Let’s start with BMP, which is the most straightforward format. BMP stands for “bitmap”, and it is literally a list of pixels, with a color specified for each. Although Microsoft Office seems to like them a lot, BMP’s are not especially desirable for designers. They have large file sizes and often low color depth (meaning they …

Understanding Image Formats, Part 1: Vector vs. Raster

Several times a month, I find myself writing to a client to ask whether they can supply me with a specific image in a different format. Sometimes they not only are confused as to why I’d need another format, but they didn’t even know that there were different formats for images.

You’re probably already familiar with JPEG images, but today I’m going to tell you about some of the other formats web designers use (such as GIF, TIFF, PNG, EPS, PSD, AI, PDF, and SVG), and why we use them.

What Are Vector and Raster Images?

Here’s a piece of terminology that …