SQUID

SQUID, or Sam's Qt Undocumented Image Differ, is a simple program that allows you to quickly compare two image files. With three toggle-able panes, SQUID supports a variety of comparison methods, ranging from simple side-by-side to automatically identifying different areas and zooming in on them.

(If you like SQUID, check out CALAMARI, the newer version!)

SQUID supports all image formats directly supported by Qt - there are no plans at present to try to support other formats. Since SQUID is a Qt application, it can in theory be ported to other platforms by anyone with a Qt license and the inclination to do so.

SQUID was designed for use with Perforce, but can also be used standalone. SQUID lives in the Perforce Public Depot - source can be found there along with executables.

As implied by its name, SQUID is simple enough not to require full-fledged documentation, but brief installation and usage notes follow.

Windows installation:

Download SQUID and the Qt DLL.

Put them somewhere in your PATH, such as your Perforce install directory.

To diff images from P4Win, go to P4Win's Settings->Options->Diff/Merge dialog. Check "allow diff of binary files", hit the Advanced button, and associate SQUID with file extensions corresponding to images.

To diff images from P4QTree, run p4 set P4DIFFBIN=squid. This sets SQUID as the diff program for all binary files.

Usage:

squid [-l name1] [-r name2] file1 file2

Contact me: spamwise at gmail dot com. Questions, suggestions, and feedback welcomed. Especially positive feedback.

Disclaimer: this tool is completely unsupported by Perforce Software, Inc.

Back to the LeadToGold.com software directory