During the years 2012-2021 I was contributing professionally to various FLOSS projects while working for Canonical and Igalia. These posts are mostly related to contributions and presentations I’ve done back then.
Sometimes, when working with the mesa drivers, modifying or replacing a shader might be extremely useful for debugging. Mesa allows users to replace their shaders at runtime without having to change the original code by providing these environment variables:
Continue reading Debugging graphics code using replacement shaders (Linux, Mesa)
As part of my work for Igalia I wanted to do some environment mapping. I was able to find plenty of high quality .hdr images online but I couldn’t find any (OSS) tool to convert them to cubemap images. Then, Nuclear (John Tsiombikas) gave me the solution: he wrote a minimal tool that does the job quickly and produces high quality cube maps.
So, here’s a short “how to” create cubemaps on Linux using his “cubemapper” program in combination with other OSS tools:
Continue reading Creating cube map images from HDR panoramas on GNU/Linux