2 Commits

Author	SHA1	Message	Date
Mirco Miranda	e96b43aef5	psd: Fix alpha blending (KF5) ... PSD files are saved with as alpha premultiplied. The problem is that alpha refers to white instead of black so it requires transformation formulas. Then, to conver PS premultiplied to QImage premultiplied you have to use the following formula: * V = Alpha + Vps - Max (C, M, Y, K, R, G, B, Gray, L\* components) * V = Vps + (Alpha - Max + 1) / 2 (a\*, b\* components) Where Max is the maximum value depending on the image depth and Vps is the valued read from the file. This is a port of MR !143 to KF5.	2023-03-29 17:58:09 +00:00
Mirco Miranda	98f19c60ae	PSD: Performance improvements and support to missing common formats ... - Supersedes merge request !55 (PSB support, XMP metadata, ICC color profile, image resolution read) - Performance improvements: 5 time faster than previous version (tested on a 3.9GB PSB: 9sec instead 47sec) - New formats support added: INDEXED (8bps), BITMAP (1bps), GRAYSCALE (8, 16, 32bps), RGB (32bps) - Should fix Bug https://bugs.kde.org/show_bug.cgi?id=397610 - Fix Bug https://bugs.kde.org/show_bug.cgi?id=428238	2022-04-04 17:22:45 +00:00