Posted by Joseph Melnick on 06/25/05 02:55

Zbigniew Lisiecki wrote:

"Zbigniew Lisiecki" <zbyszek@evot.org> wrote in message
news:d9h726$ebv$2@nemesis.news.tpi.pl...
> Hi Ervin,
>
> your wrote:
>> Zbigniew Lisiecki wrote:
>>> Does the width transformation occur on a client side !!! ?
>> yes.
>> Are you surpised?
>
> yes !
> I don't see any purpose.
> "width" tag asures there will be no other resolution in client,
> so it makes no sense to provide it.
>
>> Tip: do not try to use Apache as a resizingtool. ;-)
>
> why ?
> i tried imagecopyresampled() but it wont' work now. i need some more work.
> or some exapmle if you have one
>
>>> Could somebody help me, please.
>> yes.
>> But you give too little information.
>
> I am using apache 2.0 handler with PHP Version 4.3.4 on SuSE 9.1 Linux.
> GD Support enabled, GD Version bundled (2.0.15 compatible),
> FreeType Support enabled, FreeType Linkage with freetype, T1Lib Support
> enabled, JPG Support enabled
>
> I'd like to provide pictures of some landmaps of 3700 x 4700 pixels size,
> that is up to 5 MB jpg file size. I effectively want to transfer images
> to the client in max 700 x 800 pixels resolution.
> Also some 1000 x 1000 pixels photos are too big now. jpg files have 0.5MB,
> and I'd like to transfer up to 100k for each picture.
>
> I have a lot of such images, so I'd like to resize them on demand and keep
> smaller versions somewhere in the servers cache. I'd like to omit any
> macromedia, or other techniques with bigger ressource demands.
>
>> What OS do you use? *Nix? W$? Mac?
>> Do you want to spend $$ on it?
>
> I hope not !
> I could even compile instaed -;)
>
> best,
> zbyszek
> --
> http://zbyszek.evot.org

You would do well to use GD library to batch convert your images to the
sizes you require on your server. It requires a fair amount of processing
time to resize images and you should only need to do this once and store
smaller resampled images in an alternate directory. (I use a thumbs
directory to store these types of images.)

This type of php script will often require greater than 30 seconds to run
therefore you will have to change the default timeout setting at the start
of your resizer script.

Joseph Melnick
JM Web Consultants
Toronto, ON Canada
http://www.jphp.com/

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