On Thu, Mar 12, 2020 at 03:37:03PM +0000, Laxminarayan Bharadiya, Pankaj wrote:
-----Original Message----- From: Ville Syrjälä ville.syrjala@linux.intel.com Sent: 12 March 2020 19:35 To: Laxminarayan Bharadiya, Pankaj pankaj.laxminarayan.bharadiya@intel.com Cc: jani.nikula@linux.intel.com; daniel@ffwll.ch; intel- gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org; airlied@linux.ie; maarten.lankhorst@linux.intel.com; tzimmermann@suse.de; mripard@kernel.org; mihail.atanassov@arm.com; linux- kernel@vger.kernel.org; Nautiyal, Ankit K ankit.k.nautiyal@intel.com Subject: Re: [RFC][PATCH 0/5] Introduce drm scaling filter property
On Tue, Feb 25, 2020 at 12:35:40PM +0530, Pankaj Bharadiya wrote:
Integer scaling (IS) is a nearest-neighbor upscaling technique that simply scales up the existing pixels by an integer (i.e., whole number) multiplier. Nearest-neighbor (NN) interpolation works by filling in the missing color values in the upscaled image with that of the coordinate-mapped nearest source pixel value.
Both IS and NN preserve the clarity of the original image. In contrast, traditional upscaling algorithms, such as bilinear or bicubic interpolation, result in blurry upscaled images because they employ interpolation techniques that smooth out the transition from one pixel to another. Therefore, integer scaling is particularly useful for pixel art games that rely on sharp, blocky images to deliver their distinctive look.
Many gaming communities have been asking for integer-mode scaling support, some links and background:
https://software.intel.com/en-us/articles/integer-scaling-support-on-i ntel-graphics http://tanalin.com/en/articles/lossless-scaling/ https://community.amd.com/thread/209107 https://www.nvidia.com/en-us/geforce/forums/game-ready-drivers/13/1002 /feature-request-nonblurry-upscaling-at-integer-rat/
This patch series -
- Introduces new scaling filter property to allow userspace to select the driver's default scaling filter or Nearest-neighbor(NN) filter for scaling operations on crtc/plane.
- Implements and enable integer scaling for i915
Userspace patch series link: TBD.
That needs to be done or this will go nowhere.
Yes, Sameer is working on enabling this feature in Kodi. Sameer, please share link here once you post patches.
And who is doing it for other stuff? I think this would be most useful for games/emulators and such so IMO we should find a way to get it to the hands of users doing those things.