Hi Damien, Could you please clarify following queries. 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
