Hi, I use Qt framework (Qt3/4/5) and default true colors images are TYPE_BGRA_8 on Mac/Linux/Windows. This WE, I traced step by step LittleCMS to understand its logic and to extend it to manage alpha linked images. At this occasion, I realized that TYPE_BGRA_8 has not been optimized in the decompressor list. It was a trivial code to implement but once I get it, I get an interesting boot on performance :
Bench results : * 39 ms with LittleCMS 2.4 * 22 ms with LittleCMS 2.4 including an optimized decompressor for TYPE_BGRA_8. As Qt and Win32 DIBs (also TYPE_BGRA_8) are widely used, I think that my modifications could be of any use... Here is a link to the modified cmspack.c file : http://sebastienleon.com/info/littleCMS/cmspack.withBGRA_8.c (obviously, I give all copyrights to Marti) I'll shot another email regarding the support of Premultiplied Alpha images (linked alpha). Best regards Sébastien Léon ------------------------------------------------------------------------------ LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
