[FFmpeg-devel] [PATCH] adjust y in pad filter

[Michael Niedermayer]

On Tue, May 11, 2010 at 10:55:22PM +0200, Reimar D?ffinger wrote:
> On Tue, May 11, 2010 at 12:38:29PM -0700, Baptiste Coudurier wrote:
> > On 05/11/2010 12:32 PM, Reimar D?ffinger wrote:
> > >On Tue, May 11, 2010 at 11:04:48AM -0700, Baptiste Coudurier wrote:
> > >>On 05/11/2010 10:55 AM, Baptiste Coudurier wrote:
> > >>>On 05/11/2010 10:50 AM, Reimar D?ffinger wrote:
> > >>>>On Tue, May 11, 2010 at 10:33:51AM -0700, Baptiste Coudurier wrote:
> > >>>>>I believe that it is simpler and obvious for everybody that
> > >>>>>0,0 coordinates are bottom left corner and not top left corner.
> > >>>>
> > >>>>Not to me, I've never understood why it should be, does anyone
> > >>>>number line numbers on a page from bottom to top?
> > >>>>Why the should pixels suddenly be counted that way?
> > >>>
> > >>>What about maths ?
> > >>>
> > >>
> > >>To elaborate, it is about geometry.
> > >>In geometry, 0,0 is bottom left.
> > >
> > >No, 0,0 is just the distinguished point, there's no "left", "bottom" or
> > >whatever in geometry, even if it is usually drawn like that.
> > 
> > Just stop here. That's what I'm talking about, "usually drawn", you
> > just agreed with me, and I bet 90% of the _users_ of the filter.
> 
> Hard for me to imagine that 90% of users would expect the pad filter to
> take geometric coordinates the way they were illustrated in their maths
> books but using pixels as units and only accepting integer values instead
> of assuming it would use pixel indexes just like their photo editing
> applications...

putting the origin at the top left makes sense for left-to-right writing
people. i dont think it makes sense to people who primarely
used right to left scripts in their lifes. And i wonder what the han/kanji
using people would think of this.

i really think we could expend this bikeshed by involving them

[...

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Democracy is the form of government in which you can choose your dictator
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: Digital signature
URL: <http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/attachments/20100511/b68ae652/attachment.pgp>