resizing / scaling image

[BigTime]

Hi there

 

I have an image in a directory, that I need to resize on the fly but has to be a background in a div with a max width.  I have to determine the correct height according to this max width.

 

So I sucessfully I have accomplished this, but its not scaling its jsut giving me the top left corner according to my height width properties.

 

Here is my working code to grab height and width:

$img_path = $CONFIG["full_url"].$CONFIG["upload_folder"].ReadDB($News["image"]); 
$max_width = 110;
$max_height = 400;
list($width, $height) = getimagesize($img_path);
$ratioh = $max_height/$height;
$ratiow = $max_width/$width;
$ratio = min($ratioh, $ratiow);
// New dimensions
$mywidth = intval($ratio*$width);
$myheight = intval($ratio*$height);

 

Now using those I need to resize the image proper to get it centered up.  I dont really want to save the file I just want to display it.  Is this possible?

 

My attempts have garnered a bunch of crazy characters on screen and not an image.

 

Here is the code I added to the end:

 

// Resample
$image_p = imagecreatetruecolor($mywidth, $myheight);
$image = imagecreatefromjpeg($filename);
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $mywidth, $myheight, $width, $height);

// Output
imagejpeg($image_p, null, 100);

 

 

Then Im using it on the page like so:

<div class="theimg" style="display:block; width:<?php echo $mywidth;?>px; height:<?php echo $myheight;?>px; background-image:url(<?php echo $image_p; ?>); background-repeat: no-repeat;"/> </div>

 

and heres what I get :/

 

What am I doing wrong??  The image is not displaying inside its rounded corner border and we have crazy crap on top.

 

Thanks in advance

 

 

[BigTime]

oops

 

I half solved my issue

 

I see its returning:

<div class="theimg" style="display:block; width:110px; height:146px; background-image:url(Resource id #12); background-repeat: no-repeat;"/> </div>

 

What is the proper way to set Resource id #12 output to screen so Im getting the resized image?

[requinix]

You need a URL for that resized image. Something like

resize.php?newsid=123&width=110&height=146

The script then looks up the image to resize and outputs a resized version. Basically, what you have now but in its own script*.

 

The "crazy characters" are the binary image data. They're good. But you have to tell the browser that it should display as an image, rather than the HTML it assumes. Before you output anything,

header("Content-Type: image/jpeg");

 

* It doesn't have to be its own script - you could reuse an existing script for it. The issue is that you output the image and only the image. No HTML or anything else with it.

[BigTime]

requinix

 

Thank you for the help

 

for anyone finding this is via a search my working code implemented on my subsequent independent script (resizeit.php) as suggested was:

 

 

$img_path = $img; 
$max_width = 110;
$max_height = 400;
list($width, $height) = getimagesize($img_path);
$ratioh = $max_height/$height;
$ratiow = $max_width/$width;
$ratio = min($ratioh, $ratiow);
// New dimensions
$mywidth = intval($ratio*$width);
$myheight = intval($ratio*$height);

// Resample
$image_p = imagecreatetruecolor($mywidth, $myheight);
$image = imagecreatefromjpeg($img_path);
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $mywidth, $myheight, $width, $height);

// Output
header('Content-Type: image/jpeg'); 
imagejpeg($image_p, null, 100);

echo $image_p;

 

and in my div tag I called to (just passed the image I wanted via img=):

background-image:url(<?php echo $CONFIG["full_url"].$CONFIG["upload_folder"];?>resizeit.php?img=<?php echo ReadDB($News["image"]); ?>);

 

I used this as a workaround to implement curvycorners on images in a loop