[gentoo-dev] new USE flag: EXIF

[gentoo-dev] new USE flag: EXIF

[Robin H.Johnson]

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[If you are reading this on -core, please reply on -dev only]

As mentioned in bug #12044, I would like to propose an 'exif' USE flag.

Packages that have exif support:
php/mod_php (currently enabled always), gthumb, gphoto2.
possibly media-gfx/exiftags
and an upcoming ebuild i'm working on for exif support (jhead)

line for use.desc:
exif - Adds support for handling EXIF data

See bug #12044 for more information.

-- 
Robin Hugh Johnson
E-Mail     : robbat2@orbis-terrarum.net
Home Page  : http://www.orbis-terrarum.net/?l=people.robbat2
ICQ#       : 30269588 or 41961639
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Re: [gentoo-dev] new USE flag: EXIF

[Spider]

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begin  quote
On Thu, 24 Apr 2003 00:16:30 -0700
Robin H.Johnson <robbat2@gentoo.org> wrote:

> [If you are reading this on -core, please reply on -dev only]
> 
> As mentioned in bug #12044, I would like to propose an 'exif' USE
> flag.
> 
> Packages that have exif support:
> php/mod_php (currently enabled always), gthumb, gphoto2.
> possibly media-gfx/exiftags
> and an upcoming ebuild i'm working on for exif support (jhead)
> 
> line for use.desc:
> exif - Adds support for handling EXIF data
> 
> See bug #12044 for more information.


question, exif, is that the extended jpeg format, or am I on the wrong
track here?


//Spider

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Re: [gentoo-dev] new USE flag: EXIF

[Todd Berman]

i believe it is used to store extra info (text i think) in images, digital
cameras seem to use.

on a seperate note, i added a gpdf ebuild into bugzilla just for you :)

--Todd

On Thu, 24 Apr 2003, Spider wrote:

> begin  quote
> On Thu, 24 Apr 2003 00:16:30 -0700
> Robin H.Johnson <robbat2@gentoo.org> wrote:
>
> > [If you are reading this on -core, please reply on -dev only]
> >
> > As mentioned in bug #12044, I would like to propose an 'exif' USE
> > flag.
> >
> > Packages that have exif support:
> > php/mod_php (currently enabled always), gthumb, gphoto2.
> > possibly media-gfx/exiftags
> > and an upcoming ebuild i'm working on for exif support (jhead)
> >
> > line for use.desc:
> > exif - Adds support for handling EXIF data
> >
> > See bug #12044 for more information.
>
>
> question, exif, is that the extended jpeg format, or am I on the wrong
> track here?
>
>
> //Spider
>
> --
> begin  .signature
> This is a .signature virus! Please copy me into your .signature!
> See Microsoft KB Article Q265230 for more information.
> end
>

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Re: [gentoo-dev] new USE flag: EXIF

[Robin H.Johnson]

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On Thu, Apr 24, 2003 at 12:50:34PM +0200, Spider wrote:
> question, exif, is that the extended jpeg format, or am I on the wrong
> track here?

EXIF is a data chunk embedded inside a JPEG or TIFF. It is used by nearly every
digital camera manufacter out there presently.

The data is usually a whole lot of parameters from the camera
(fstop/focallength/exposurelength etc.) Also there is a thumbnail
created by most cameras embedded inside the file (your camera uses this
for the thumbnail directly), and there are a few applications that use
it for the thumbnail as well (Photoshop/Paint Shop Pro on windows, not
certain about linux).

I'm told that WindowsXP has native support for reading EXIF data inside
explorer, and shows the information in the status bar.

Here are some example images of mine, with a small subset of the available
info displayed below them.
http://photo.orbis-terrarum.net/index.php?pageType=image&currDir=./TechBC/Onyx1600_6_Feburary_2003&image=IMG_3043.JPG
http://photo.orbis-terrarum.net/index.php?currDir=./TechBC/FakeSpace_Server_Room_November_2002&pageType=image&image=DCP_5013.JPG

-- 
Robin Hugh Johnson
E-Mail     : robbat2@orbis-terrarum.net
Home Page  : http://www.orbis-terrarum.net/?l=people.robbat2
ICQ#       : 30269588 or 41961639
GnuPG FP   : 11AC BA4F 4778 E3F6 E4ED  F38E B27B 944E 3488 4E85

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Re: [gentoo-dev] new USE flag: EXIF

[Daniel Armyr]

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|>line for use.desc:
|>exif - Adds support for handling EXIF data

| question, exif, is that the extended jpeg format, or am I on the wrong
| track here?

How about adding amention of the fact that exif is an extension to jpeg
in the desc. The line given is fairly redundant if you know what exif
is, and quite pointless if you don't.

//Daniel Armyr

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C118 KEVII Hall
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Re: [gentoo-dev] new USE flag: EXIF

[Martin Schlemmer]

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On Sat, 2003-04-26 at 16:23, Daniel Armyr wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> 
> |>line for use.desc:
> |>exif - Adds support for handling EXIF data
> 
> | question, exif, is that the extended jpeg format, or am I on the wrong
> | track here?
> 
> How about adding amention of the fact that exif is an extension to jpeg
> in the desc. The line given is fairly redundant if you know what exif
> is, and quite pointless if you don't.
> 

We cannot then maybe just include support for this if 'jpeg' in USE ?
I do not want to sound like shooting the 'exif' USE flag down, but it
would be nice in general if we could keep the number down if possible
...


-- 

Martin Schlemmer
Gentoo Linux Developer, Desktop/System Team Developer
Cape Town, South Africa




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[gentoo-dev] Re: [gentoo-core] new USE flag: EXIF

[Robin H.Johnson]

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On Thu, Apr 24, 2003 at 09:16:05PM +0200, Martin Schlemmer wrote:
> On Thu, 2003-04-24 at 09:16, Robin H.Johnson wrote:
> How big is the overhead of having it always enabled ?
> Not much stuff that can use it, so if not big, rather
> just enabled it as is in php....
Inside PHP, it's a massive 140kb single C file.

The shared extension version bloats PHP by ~200kb. I don't have any good
stats for the non-shared version.

Small things, up to 25kb or so of binary I don't mind, but big things
like this aren't it.

-- 
Robin Hugh Johnson
E-Mail     : robbat2@orbis-terrarum.net
Home Page  : http://www.orbis-terrarum.net/?l=people.robbat2
ICQ#       : 30269588 or 41961639
GnuPG FP   : 11AC BA4F 4778 E3F6 E4ED  F38E B27B 944E 3488 4E85

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