Image Halftone Processor

Sun, 20 Mar 2016 00:00:00 +0000

More a curiosity than an actual useful project, I just had an Idea I wanted to try out, and this is the result.

This Java application (or library, if you want to include it in your own project) simply takes a source image, a couple of optional parameters, and outputs a new image with a halftone- like effect.

Briefly, works by stepping through the pixels of the source image at an interval defined by the dot size specified, samples the brightness of that pixel, and draws a circle onto the destination image, scaled according to the source pixel brightness.

Delphi: Write multi-line text on a TCanvas

Wed, 24 May 2006 08:06:01 +0000

I’ve had to do quite a bit of stuff with images in Delphi recently (lots of manual drawing too), and discovered TCanvas’ TextOut method will only draw text onto one line, line breaks and newlines are ignored. Google search results suggested Windows’ DrawText function, however despite all the formatting and alignment flags it takes, it refused to draw text centred vertically.

Anyway, here’s a small-ish procedure which will take your multi-line text, and draw it centred on the canvas you pass it. You also need to pass the width and height of the canvas you’re drawing to. It assumes the font can everything else has been set by you, prior to calling it. Also, be sure “Graphics” is in your “uses” section.

Graphics on ShrimpWorks

Image Halftone Processor

Delphi: Write multi-line text on a TCanvas