On Tue, Mar 25, 2014 at 03:33:42PM +0530, Sagar Arun Kamble wrote: > Hi Damien, > > Could you please clarify following queries. He did, in a reply to your mail ... -Daniel > > Thanks, > Sagar > On Fri, 2014-03-21 at 19:06 +0530, Sagar Arun Kamble wrote: > > Hi Damien, > > > > On Thu, 2014-03-20 at 14:45 +0000, Damien Lespiau wrote: > > > On Thu, Mar 20, 2014 at 02:11:40PM +0000, Damien Lespiau wrote: > > > > (source is premultiplied) > > > > > > > > RGBA = ADD(SRC_COLOR*SRC_ALPHA, DST_COLOR*ONE_MINUS_SRC_ALPHA) > > > > > > Grr, copy/paste error. If the source is already premultiplied: > > > > > > RGBA = ADD(SRC_COLOR, DST_COLOR*ONE_MINUS_SRC_ALPHA) > > > > > > > 1. Currently there is no interface to advertise the DRM_FORMATS plane > > supportes to user mode? Should we add new IOCTL for that and include > > pre-multiplied alpha formats while advertising? Or am I missing any such > > API already available? > > > > 2. About constant alpha property - when we program constant alpha > > register will hardware be able to take care of the blending as per > > equations you have specified for non-premultiplied-alpha and > > premultiplied-alpha cases or we have to do any additional setting? > > Confusion is because of two combinations: > > a. pre-multiplied alpha+constant alpha > > b. non-pre-multiplied alpha+constant alpha > > > > Kindly clarify. > > > > thanks, > > Sagar > > > > > > > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
