https://www.old.photivo.org/ 2026-04-10T15:17:36+0200 https://www.old.photivo.org/ https://www.old.photivo.org/lib/tpl/mnml-blog/images/favicon.ico text/html 2020-04-04T18:21:16+0200 Anonymous (anonymous@undisclosed.example.com) https://www.old.photivo.org/manual/internals/32bit_issue 32bit Issue Problem Photivo crashes on 32bit systems when a large image (about 10 Mpx or more) is opened in 1:1 pipe. To better understand the details about this, first have a look at the Processing and Pipe size sections on the Workflow page. The problem on 32bit systems is the 2 text/html 2020-04-04T18:21:16+0200 Anonymous (anonymous@undisclosed.example.com) https://www.old.photivo.org/manual/internals/luminance_mask Luminance masks In Photivo several filters rely internally on a luminance mask to restrict the effect of a filter to a certain tonal range. These masks are modelled after the common workflow in Gimp: Get a luminance representation of the image and mask the desired parts. text/html 2020-04-04T18:21:16+0200 Anonymous (anonymous@undisclosed.example.com) https://www.old.photivo.org/manual/internals/theming Theming Photivo’s GUI To achieve its unique look and the ability to switch between different themes Photivo mostly relies on Qt’s styling abilities around QPalette, QStyle and QSS stylesheets. On top of that ptTheme has its own stylsheet format and parser to avoid duplicated stylesheets and define colour variables in one single place instead of putting the actual colour values wherever you need them.