Tag Archives: HowTo

HTML5 Canvas: Smooth, variable width lines with transparency.

When making a drawing app with HTML5 canvas, you might come up against the problem of making a smooth, variable width line. Eventually you might find that you can make several calls to ctx.quadraticCurveTo(x,y,xc,yc) and get some kind of effect. … Continue reading

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HTML5 Canvas, Pixel Compositing, Transparency, and why all the trivia!

One thing I really hate about new technology are all the early adopters who incessantly post the same trivial examples. They cross link them too. So you can go from one page to the next, and see essentially the same … Continue reading

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Qt C++: Threaded Communication with Artema Hybrid on Linux

Communicating with an Artema Hybrid CC Payment device is actually deceptively simple. I’ve written an application what uses a webkit widget exclusively for the UI display, and so I hook into the Javascript to provide some extra functionality to the … Continue reading

Posted in c/C++, C/C++ Programming, Computer Science, Javascript Tutorials, Linux, OOP, Qt, Tips and Tricks, Topics, Tutorials | Tagged , , , , | Leave a comment