Hi Rajeev, As far as I remember there is already an alpha analysis being done by Evas image loaders to set "sparse alpha" flag. I believe the same analysis can be used to detect no-alpha situation.
If so, doing in Evas is a best fit as it will work with images loaded from internet or disk. BR, -- Gustavo On Fri, Apr 13, 2012 at 10:54 AM, Rajeev Ranjan <rajee...@samsung.com> wrote: > Hi, > Attached to the mail is a patch to set the alpha information for an image > header to 0 with alpha present but all the texels being opaque. > > The objective of this patch is to avoid the alpha blending for the images > which don't use alpha but while creating, the alpha channel has been added by > the creator. > In order to do so, the image individual texels are scanned to find if alpha > is used in the image for any texel and the image is fully opaque, while > saving the alpha is set to 0. > If the alpha information in image header is set to 0 already, then this > stage is skipped. > > This implementation can be done at either eet level or edje level. Currently > in this patch it has been done in eet. > > If required, it can be implemented in edje_cc itself rather than in eet image > data saving. > One more option can be to make this scanning optional which can be done in > edje_cc through an option provided this is implementd at edje_cc level rather > than at eet level. > > Change Description: > > While writing the image to eet file, the image data is scanned to find out > whether the alpha value in header is set to 1 and is not being used in the > image. > If that is the case while writing, we set the alpha to 0 to avoid blending > for such images in the graphics pipeline. > > This will be an optimization for rendering once the image is loaded from eet > file as alpha blending can be avoided for such images. > > Signed-Off-By: RAJEEV RANJAN<rajee...@samsumg.com> > > Please review the same and provide your feedbacks. > Thank You. > Regards, > Rajeev > ------------------------------------------------------------------------------ > For Developers, A Lot Can Happen In A Second. > Boundary is the first to Know...and Tell You. > Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! > http://p.sf.net/sfu/Boundary-d2dvs2 > _______________________________________________ > enlightenment-devel mailing list > enlightenment-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/enlightenment-devel > -- Gustavo Sverzut Barbieri http://profusion.mobi embedded systems -------------------------------------- MSN: barbi...@gmail.com Skype: gsbarbieri Mobile: +55 (19) 9225-2202 ------------------------------------------------------------------------------ For Developers, A Lot Can Happen In A Second. Boundary is the first to Know...and Tell You. Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! http://p.sf.net/sfu/Boundary-d2dvs2 _______________________________________________ enlightenment-devel mailing list enlightenment-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/enlightenment-devel
