[ciapug] images

[Dave J. Hala Jr.]

Blake, thanks for the function. I'm using it and it works great!!!
Tweaking these images on the upload is a great idea.

I do these boring data entry and reporting forms all day long. Its nice
to do something *new* for a change.

Can I return the favor you by recommending a dog for you to adopt?

:) Dave


On Thu, 2006-08-03 at 13:45, Blake Norrell wrote:
> Heres a function I used to handle file uploads for a car site I work on.
>  It will resize the image (and keep the aspect ratio) based on the $w
> and $h parameters passed to it.  The $img field is just
> $_FILES['uploaded_file_name']['tmp'].  If the image being uploaded
> (120x90) is actually smaller than the parameters entered (say 400x300),
> it will create a new image (400x300) with the original now centered on a
> white background:
> 
> function createImage($img,$w,$h)
> {
>    $dx=$dy=0;
>    $imagedata = getimagesize($img);
>    if($imagedata[0]>$w && $imagedata[1]>$h){
>      if ($w && ($imagedata[0] < $imagedata[1])) 
>      {
>        $dw = ($h / $imagedata[1]) * $imagedata[0];
> 	   $dh=$h;
>      }
>      else 
>      {
>        $dh = ($w / $imagedata[0]) * $imagedata[1];
> 	   $dw=$w;
>      }
>    } else {
> 	 $dx=(0.5*$w)-(0.5*$imagedata[0]);
> 	 $dy=(0.5*$h)-(0.5*$imagedata[1]);
> 	 $dw=$imagedata[0];
> 	 $dh=$imagedata[1];
>    }
>    $im2 = ImageCreateTrueColor($w,$h);
>    imagefill($im2, 0, 0, 0xFFFFFF);
>    $image = ImageCreateFromJpeg($img);
>    imagecopyResampled ($im2, $image, $dx, $dy, 0, 0, $dw, $dh,
> $imagedata[0], $imagedata[1]);
>    ImageJpeg($im2, "$my_new_img, 70);
>    imagedestroy($im2);
>    imagedestroy($image);
> }	
> 
> 
> >>> Tony Bibbs <tony at tonybibbs.com> 8/3/2006 12:43 pm >>>
> Good points.  I believe that library enforces keeping the aspect ratio,
> 
> too.
> 
> --Tony
> 
> David Champion wrote:
> > I would resize the image at upload time (using something like what
> Tony 
> > posted). Be careful of aspect ratio - the uploader I've used (in 
> > vbscript - sorry) would let you specify the vertical limit, then
> scale 
> > to keep the aspect ratio.
> > 
> > End users typically don't know / don't care about image sizes and
> such - 
> > they'll upload full resolution images from their shiny new 7mp
> camera, 
> > then complain when they take too long to load.
> > 
> > -dc
> > 
> > Dave J. Hala Jr. wrote:
> >> I'm working on a site for dog adoptions. I'd like to track some
> basic
> >> information about the dog along with its photo. An admin will upload
> a
> >> image and type in the basic information. The home page will look in
> the
> >> database and display the dogs bio for the all the homeless dogs.
> >>  
> >> My concern is regarding the image of the dog. What I want to avoid
> is
> >> having to deal with a bunch of oddly sized images, etc.  I'm
> considering
> >> putting together some criteria for the admin to use when uploading
> the
> >> image. I was considering forcing the image size using the height
> and
> >> width tags in my html. My concern is that it still leaves a lot of
> room
> >> for an admin to do some bad things.
> >>
> >> Anyone have any thoughts/experience on this issue?
> >>
> >> :) Dave
> >>
> > 
> > 
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Open Source Information Systems, Inc. (OSIS)
Dave J. Hala Jr., President <dave at osis.us>
641.485.1606