image cropping with codeigniter no GD library - GD2 is intalled

Question

I am working on media library for a website at the moment, and one of the features is that user can create a cropped version of an image that they upload.

My problem however is this, when I try and crop the image, I get the following error,

The path to the image is not correct.

Here is my code,

$config['image_library'] = 'gd2';
    $config['source_image'] = "/media/images/products/".$this->data['image'];
    //die($config['source_image']);
    $config['maintain_ratio'] = FALSE;
    $config['x_axis'] = $this->input->post('x');
    $config['y_axis'] = $this->input->post('y');
    $config['width'] = $this->input->post('w');
    $config['height'] = $this->input->post('h');
    $config['dynamic_output'] = FALSE;
    $config['create_thumb'] = TRUE;
    $this->load->library('image_lib', $config);

    if(!$this->image_lib->crop()) {
        if($this->input->post('isAjax') == "1") {
            echo json_encode($this->image_lib->display_errors());
        } else {
            $this->data['image_error'] = $this->image_lib->display_errors();
            $this->template->build('/admin/media/crop', $this->data);
        }       
    } else {
        $filename = base_url()."media/images/products/".$this->data['image'];
        $extension_pos = strrpos($filename, '.'); // find position of the last dot, so where the extension starts
        $thumb = substr($filename, 0, $extension_pos) . '_thumb' . substr($filename, $extension_pos);
        if($this->input->post('isAjax') == 1) {
            echo json_encode($success = array('message' => 'Image Cropped'));
        } else {
            $this->data['success'] = "Image Cropped";
            $this->template->build('/admin/media/crop', $this->data);
        }   
    }

So I though I would change $config['source_image'] to the following,

$config['source_image'] = "./media/images/products/".$this->data['image'];

however that just leaves with this message,

Your server does not support the GD function required to process this type of image.

Am I doing something fundamentally wrong? I am only trying to crop a simple .png, and the file certainly exists on my server, and I most definatly have GD2 installed.

GD2 may be installed, but was it compiled with PNG support? Just because GD is there doesn't mean it can handle all the usual file formats. — Marc B, Feb 01 '12 at 17:40
Have you tried an absolute path from the document root? Try `$_SERVER['DOCUMENT_ROOT'] . 'rest/of/path/to/file'` — Ben Swinburne, Feb 01 '12 at 17:41
would GD_INFO tell what it supports? And I have previoulsy cropped PNG's on this machine. — Udders, Feb 01 '12 at 17:41

score 0 · Answer 1 · answered Feb 02 '12 at 06:15

0

The is most likely just a file path issue (CI is pretty good about accurate, relevant error messages). Here are the steps I would take to resolve it:

var_dump(file_exists($config['source_image']) to see if PHP finds the file. I'd be shocked by a "true" response here.
If the filesystem is case-sensitive, make sure that's not the problem
Check the include path (I assume regular includes are working fine if CI gets this far...)
More of an anti-step, but DON'T use $_SERVER['DOCUMENT_ROOT'], as a commenter suggests. FC_PATH (or other CI-defined constants) should get you the base path you need.

Happy hunting.

answered Feb 02 '12 at 06:15

landons

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file_exists return TRUE, any other thoughts? – Udders Feb 02 '12 at 10:37
Truly baffled. Maybe put some step-by-step debug output in the relevant image manipulation functions to find where it's arriving at the error state? – landons Feb 02 '12 at 23:05
figured it out, I was submitting the form,to `controller/view`, but the `$this->data['image']` was constructed from URI segments, so need to submit the form to `current_url()` – Udders Feb 03 '12 at 09:43

image cropping with codeigniter no GD library - GD2 is intalled

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