From: Sagar Arun Kamble <sagar.a.kamble@intel.com>
To: Damien Lespiau <damien.lespiau@intel.com>
Cc: intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH 0/4] Adding support for plane alpha/color blending through drm property
Date: Tue, 25 Mar 2014 15:33:42 +0530 [thread overview]
Message-ID: <1395741822.2740.19.camel@sagar-desktop> (raw)
In-Reply-To: <1395409006.2740.18.camel@sagar-desktop>
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
>
>
next prev parent reply other threads:[~2014-03-25 10:02 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-19 10:08 [RFC 1/1] drm/i915: Added support for setting plane alpha through drm property sagar.a.kamble
2014-02-24 15:44 ` Sagar Arun Kamble
2014-03-06 12:03 ` Damien Lespiau
2014-03-06 12:09 ` Damien Lespiau
2014-02-25 18:18 ` Ville Syrjälä
2014-03-04 9:42 ` [Intel-gfx] " Daniel Vetter
2014-03-04 12:06 ` Ville Syrjälä
2014-03-06 10:28 ` [Intel-gfx] " Sagar Arun Kamble
2014-03-06 11:24 ` Daniel Vetter
2014-03-08 8:21 ` [PATCH 0/4] Adding support for plane alpha/color blending " sagar.a.kamble
2014-03-08 8:21 ` [PATCH 1/4] drm: Added plane alpha and color blending property sagar.a.kamble
2014-03-08 8:21 ` sagar.a.kamble
2014-03-20 11:58 ` [Intel-gfx] " Damien Lespiau
2014-03-20 11:58 ` Damien Lespiau
2014-03-20 14:21 ` [Intel-gfx] " Damien Lespiau
2014-03-08 8:21 ` [PATCH 2/4] drm/i915: Enabling constant alpha drm property sagar.a.kamble
2014-03-20 13:51 ` Damien Lespiau
2014-03-25 14:32 ` [PATCH v2 1/4] drm: Adding new flag to restrict bitmask drm properties as 32 bit type and 32 bit value pair sagar.a.kamble
2014-03-25 14:32 ` sagar.a.kamble
2014-03-25 14:32 ` [PATCH v2 2/4] drm: Added plane alpha and color blending property sagar.a.kamble
2014-03-25 14:32 ` sagar.a.kamble
2014-03-25 14:32 ` [PATCH v2 3/4] drm/i915: Enabling constant alpha drm property sagar.a.kamble
2014-04-01 4:51 ` Sagar Arun Kamble
2014-04-02 6:12 ` Sagar Arun Kamble
2014-04-03 5:43 ` Sagar Arun Kamble
2014-04-15 9:44 ` Sagar Arun Kamble
2014-04-15 10:35 ` Ville Syrjälä
2014-04-15 11:23 ` Sagar Arun Kamble
2014-04-15 11:44 ` Ville Syrjälä
2014-03-25 14:32 ` [PATCH v2 4/4] Documentation: drm: describing plane alpha and color blending property sagar.a.kamble
2014-03-26 12:30 ` David Herrmann
2014-03-27 9:03 ` [PATCH v3 1/1] " sagar.a.kamble
2014-03-27 9:50 ` sagar.a.kamble
2014-03-27 12:38 ` David Herrmann
2014-03-27 17:31 ` [PATCH v4 " sagar.a.kamble
2014-04-10 10:39 ` [PATCH v2 1/4] drm: Adding new flag to restrict bitmask drm properties as 32 bit type and 32 bit value pair Sagar Arun Kamble
2014-04-10 10:39 ` Sagar Arun Kamble
2014-03-08 8:21 ` [PATCH 3/4] drm/i915: Enabling pre-multiplied alpha drm property sagar.a.kamble
2014-03-19 15:10 ` Damien Lespiau
2014-03-20 9:59 ` Sagar Arun Kamble
2014-03-20 11:38 ` Damien Lespiau
2014-03-20 13:51 ` Daniel Vetter
2014-03-20 14:00 ` Damien Lespiau
2014-03-08 8:21 ` [PATCH 4/4] Documentation: drm: describing plane alpha and color blending property sagar.a.kamble
2014-03-10 14:43 ` Laurent Pinchart
2014-03-20 14:11 ` [PATCH 0/4] Adding support for plane alpha/color blending through drm property Damien Lespiau
2014-03-20 14:45 ` Damien Lespiau
2014-03-21 13:36 ` Sagar Arun Kamble
2014-03-21 19:23 ` Damien Lespiau
2014-04-02 19:36 ` Ville Syrjälä
2014-03-25 10:03 ` Sagar Arun Kamble [this message]
2014-03-25 10:51 ` Daniel Vetter
2014-03-25 12:26 ` Damien Lespiau
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