What does this sign ≡ mean in computer science?

Question

C++ / C#

What does this sign ≡ mean in computer science? I couldn't google because I don't know what it's called.

Answer 1

If the text is in a raster, it's easiest to just alpha blend it onto the image in a simple loop. If the text is in a vector, then we freetype it into a raster and then alpha blend it onto the image. If using Qt, we load the image into a QImage and set it as a QPaintera target, and then just painter->drawText(...)