NAME
file_dataurl_save - Saves the image as many small tiles using data:-urls
SYNOPSIS
<Save>/HTML with many small tiles using data:-urls/html
DESCRIPTION
Saves the image as many small tiles using data:-urls.
PARAMETERS
[PF_SPINNER, "tile_x", "Tile width", 32, [0, 8192, 1, 10]],
[PF_SPINNER, "tile_y", "Tile height", 32, [0, 8192, 1, 10]],
[PF_RADIO, "filetype", "Underlying file type", 0,
[GIF => 0, JFIF => 1, PNG => 2]],IMAGE TYPES
*
DATAURL FILE FORMAT
After reading rfc2397, which describes the data: url scheme, I got the idea of embedding a normal image into a html document, without resorting to external files.
This is accomplished by embedding small tiles of the image directly into data:-urls. Since attribute values are by default limited to 1024 bytes this limits the size of a tile to approximately 34x34 pixels (gif compression).
However, since rfc2397 is only a proposed standard, you might want to use much larger tile sizes (upto the image size), since most browsers generally do not care for the url length.
Browser compatibility list:
Firefox 24.4.0 worksHISTORY
<schmorp> yosh: cvs.gimp.org
<yosh> I mean which "removed debugging crap" one
<schmorp> yosh: or did you mean the debugging code in the Perl-Server?
<yosh> yah
<yosh> debian's perl whines about using -D since it's not compiled with -DDEBUGGING
<schmorp> yosh: ah.. I it was ebing queried..
<schmorp> yosh: yeah, but you did not see the <STDIN> that required people to press enter in colorhtml ;)
<schmorp> anybody here with netscape 3.0? or msie 5.0? or any other graphical browser?
<yosh> schmorp: it was in innerbevel, you must've fixed colorhtml before I had a chance to update
<maswan> schmorp: ns3.0 here
<schmorp> maswan: could you try something out? -> http://www.goof.com/pcg/marc/dataurl.html
<schmorp> maswan: what do you see, especially below "dataurl filter"
<schmorp> yosh: at least ;->
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<maswan> schmorp: slooow....
<Stric> schmorp, evil thingie.. I'm loading it in win98/ie on a p60 8)
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<schmorp> that html page contains no external links, i.e. all images are embedded
<schmorp> and yes, the colour-changing is bogging down most browsers
<schmorp> i want to find out how many browsers support the data: url
<Stric> I get a gazillion of [x] broken image thingies at the bottom half
<maswan> schmorp: embedded? I got _lots_ of broken external images on the bottom half
<schmorp> stric: which browser?
<maswan> http://www.goof.com/pcg/marc/data:image/gif;base64,
R0lGODlhIgAiAOMAAA8UFDo/OGt9eJecj722oFxfVIl/a+vSrn5oTtiyg7qfe6SGZUlgX+LCliElIdCldCwAAAAAIgAiAAAE/vAd9dajKlV6FddY9TTd9ZzmSWkPi2quYiUsiJ4uXd+6i/e3Vk/XQpGMRVxj9
1omnE/n8nhqUGmv2lMnXY6EWBc0rNxah8IRjQQbeouw0dhKT5+562Cevu1BpWtcPy1WYHdmT2psXn1DjYF8fmdnhJCIB4VTmlyRdE5ggZhTnIFrXX6SDaKPZpN4XAd+sXV8f1GagFmmd7ZWmKaNo5ZDs1GoTh
k0sW5dkcGtJIeeuJ6kt7Nny7vTzXyiq2zGo7VS4NSqrdiIU8voJKLV04hypa5mB/DOw+K3qt147JQBfPLLU0Fh5IxhqdTHXh
<Stric> schmorp, win98/ie (4? 5?)
<schmorp> maswan: ok, so ns3.0 does not support it
<schmorp> stric: i don't know how to find out ;9
<Stric> schmorp, 5 appearantly...
<schmorp> ok... ns3.0 and msie5 show broken image icons.
<schmorp> msie displays one dialog box per link (evil)
<schmorp> lynx errornously displays the base64 data
<yosh> haha
<schmorp> so only netscape 4 displays it correctly
<yosh> that is too evil
<yosh> tried mozilla?
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<schmorp> yosh: mozilla does not run, did not run and will probably never run
<schmorp> yosh: everytime I come here and somebody talks about mozilla he says "well, it is quite cool"
<schmorp> yosh: everytime _I_ try it ends in an endless loop after 5 seconds or so
<yosh> heh
<Stric> you must be broken then
<schmorp> yosh: but I guess mozilla will do it as well
<yosh> schmorp: I get broken images with NS 4.7
<schmorp> yosh: really? thats cool... it works with ns 4.06 (here) and ns 4.6 (my friend)
<schmorp> yosh: on linux?
<yosh> yes
<schmorp> yosh: i wonder why they removed support for it..
<sjburges> I get broken stuff with 4.51
*** TomR^AwaY [~tomr@judas.aceldama.com] is now known as Tommer
<yosh> hey Tommer
<Tommer> Works for me on NS 4.71 on LinuxPPC
<Tommer> Hullo yosh
<schmorp> tommer: really?
<Tommer> dataurl is very cute, schmorp
<Tommer> Yup
* yosh tries mozilla
<schmorp> something must be broken... 4.06 yes, 4.51 no, 4.6 yes, 4.7 no, 4.71 yes...
<schmorp> I see a pattern...
<Tommer> Oh, you mean the ($ver*100)%2 == (dataurl works) relation?
<Tommer> Oh wait, 4.6 doesn't match that.
* maswan tries ns4.61 on aix
<schmorp> oh, that 4.6 is probably measurement error
<Tommer> schmorp, for the next trick, do <frameset> <frame src=dataurl:> <frame src=dataurl:> </frameset> :)
<yosh> haha
<schmorp> hmm... it works with 4.51 here....
<maswan> eeek.
<Tommer> how about <body background="dataurl:...">
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<schmorp> tommer: hmm... now that would be cool... it would not even need base64 encoding, and would probably work even with lynx
<maswan> this one is sloow for some reason.
<tc> hmm
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<Tommer> schmorp: yes, as long as you used " everywhere you'd be fine :)
<schmorp> maswan: "aix"....
<tc> could it be that clinton only knows of the internet from al gore?
<Stric> schmorp, low mhz combined with netscape on 24bpp
<maswan> hmm.. or ssh. oops. :)
<tc> "reduce the gap between rich and poor by giving everyone internet access"
<Tommer> Does anyone have red+blue 3D glasses handy?
<tc> yay clinton. you da man
<maswan> schmorp: works on this one
<schmorp> stric: but since netscaope can't display colour icons in 24bpp it should be much faster ;->
<schmorp> maswan: thanks ;)
<Stric> schmorp, I haven't had that problem on non-linux
<maswan> hmm.. it is estimating speed at 2k/s
<schmorp> tommer: the problem is that urls are max. 1k in size
<Stric> schmorp, I correct that to aix/irix/solaris
<schmorp> tommer: but on the browsers that support it, dataurls can be much longer
<maswan> which means much time for that file
<Tommer> schmorp: can't you specify encoding=base64 _and_ encoding=gzip?
<yosh> hum, mozilla sucks ;)
<schmorp> tommer: i can't specify an encoding per se. if, then it must be a netscape extension
<schmorp> tommer: maybe image/gzip-jpg or something....
<Tommer> schmorp: oh, so you can only specify a content type, not an encoding? I was guessing about the encoding thing.
* maswan tries irix netscape 4.something
<maswan> 4.61 here too
<schmorp> tommer: the base64 is specified as ";base64", so it is somethign special
<schmorp> tommer: but since I can specify charset=xxx, maybe I can also add encoding=gzip...
<maswan> works that too
<schmorp> tommer: BUT... if I can use gzip, then I cna use long urls. Then I can use png, and then i don't need gzip
<Tommer> schmorp: just think, you could put a whole site in one page with framesets and dataurl :)
<schmorp> yosh: mozilla sucks, yes, but does it display it?
<Tommer> How are gzip and long urls related, schmorp?
<yosh> schmorp: it segfaults
<yosh> ;)
<schmorp> tommer: hmm... I'm thinking images only...
<schmorp> tommer: if you think text then encoding=gzip makes sense
<schmorp> tommer: I also haven'T tried wether these urls work in frameset and normal anchor elements
<schmorp> but actually, the colorhtml filter is much more portable
<yosh> yeah, it just takes aching long to render and scroll
<Tommer> schmorp: how about <img lowsrc="data:image/gif;base64, ... " src="/images/foo.gif"> ?
<schmorp> yes... maybe when this type of encapsulation becomes more often used... at least
<schmorp> we can claim that msie is not rfc2397 compatible
<ole_zzz> xachbot, seen dv
-XachBot:#gimp- I last saw dv (veillard@home5.inrialpes.fr) 7d 13h 17m ago [quit: (xchat exiting..)]
<Stric> schmorp, and who will care? 8)
<schmorp> tommer: that might even be a useful usage!!
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<JohnP> Hey!
<Tommer> schmorp: but lowsrc is an evil Netscape invention :)
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<Stric> tigpoo
<JohnP> tigert!
<Tommer> schmorp: <img lowsrc="data:image/xbm;base64, ... " src="/images/foo.gif">
<schmorp> tommer: does the lowsrc image have to have the same size/resolution?
<Tommer> Hmm, does <img src="internal-gopher-menu"> and such work?
<maswan> hmm.. sleep. now.
<Tommer> schmorp: lowsrc _should_ have the same size/resolution. if you specify width and height then the lowsrc will be resized of course.
<schmorp> tommer: .... and since it's netscaoe only we do not need to care
<Tommer> schmorp: yes, if you're abusing HTML you may as well go whole hog.
<schmorp> tommer: hey, it's a "proposed standard" ;)
<yosh> heh
<Tommer> A nice thing about NS on the Mac is that if you shrink a mono image then it renders it antialiased :)
Tommer> Pull out your red+blue 3D glasses and go to: http://www.aceldama.com/~tomr/wx/tomrcam-3d-2.jpg
<schmorp> yosh: rfc2397 "data: url scheme"
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<schmorp> tommer: looks flashy (no 3d cam here ;)
<schmorp> ok, bye all!
<Tommer> ttyl schmorp
<schmorp> sjburges: have a nice time with your new g/f!
<yosh> interesting
<Tommer> schmorp: you need 3D glasses
<yosh> ok, food
*** yosh [manish@graft.XCF.Berkeley.EDU] is now known as yosh_food
<schmorp> tommer: if you do some weird things with urls, drop me a note ;->
<schmorp> tommer: ah, yes, _glasses_ i meantAUTHOR
Marc Lehmann <pcg@goof.com>
DATE
1999-11-20
LICENSE
Distributed under the same terms as Gimp-Perl.