Image Resizing

[martinm_92]

Having a nightmare here lol

 

$img->set_size(225);

 

That is resizing the image with a maximum width but i need to resize it to make it have a maximum height but can't figure out how to do it

 

Here's my full code if you want to see it:

 

<?php
include("class.imaging.php");

// The file
$dir = "upload/";
$file = $newfile;
$filename = $dir . $file;


$img = new imaging;
$img->set_img($filename);
$img->set_quality(120);

// Profile Picture
$img->set_size(225);
$img->save_img("upload/thumb/" . $file);

$img->clear_cache();
?>

 

[litebearer]

need to see the code for the actual resizing script

[martinm_92]

Ok its a bit long.

<?php

// Imaging
class imaging
{

    // Variables
    private $img_input;
    private $img_output;
    private $img_src;
    private $format;
    private $quality = 120;
    private $x_input;
    private $y_input;
    private $x_output;
    private $y_output;
    private $resize;

    // Set image
    public function set_img($img)
    {

        // Find format
        $ext = strtoupper(pathinfo($img, PATHINFO_EXTENSION));

        // JPEG image
        if(is_file($img) && ($ext == "JPG" OR $ext == "JPEG"))
        {

            $this->format = $ext;
            $this->img_input = ImageCreateFromJPEG($img);
            $this->img_src = $img;
           

        }

        // PNG image
        elseif(is_file($img) && $ext == "PNG")
        {

            $this->format = $ext;
            $this->img_input = ImageCreateFromPNG($img);
            $this->img_src = $img;

        }

        // GIF image
        elseif(is_file($img) && $ext == "GIF")
        {

            $this->format = $ext;
            $this->img_input = ImageCreateFromGIF($img);
            $this->img_src = $img;

        }

        // Get dimensions
        $this->x_input = imagesx($this->img_input);
        $this->y_input = imagesy($this->img_input);

    }

    // Set maximum image size (pixels)
    public function set_size($size = 100)
    {

        // Resize
        if($this->x_input > $size && $this->y_input > $size)
        {

            // Wide
            if($this->x_input >= $this->y_input)
            {

                $this->x_output = $size;
                $this->y_output = ($this->x_output / $this->x_input) * $this->y_input;

            }

            // Tall
            else
            {

                $this->y_output = $size;
                $this->x_output = ($this->y_output / $this->y_input) * $this->x_input;

            }

            // Ready
            $this->resize = TRUE;

        }

        // Don't resize
        else { $this->resize = FALSE; }

    }

    // Set image quality (JPEG only)
    public function set_quality($quality)
    {

        if(is_int($quality))
        {

            $this->quality = $quality;

        }

    }

    // Save image
    public function save_img($path)
    {

        // Resize
        if($this->resize)
        {

            $this->img_output = ImageCreateTrueColor($this->x_output, $this->y_output);
		imagesavealpha($this->img_output, true);
		$trans_colour = imagecolorallocatealpha($this->img_output, 0, 0, 0, 127);
   			imagefill($this->img_output, 0, 0, $trans_colour);
            ImageCopyResampled($this->img_output, $this->img_input, 0, 0, 0, 0, $this->x_output, $this->y_output, $this->x_input, $this->y_input);

        }

        // Save JPEG
        if($this->format == "JPG" OR $this->format == "JPEG")
        {

            if($this->resize) { imageJPEG($this->img_output, $path, $this->quality); }
            else { copy($this->img_src, $path); }

        }

        // Save PNG
        elseif($this->format == "PNG")
        {

            if($this->resize) { imagePNG($this->img_output, $path); }
            else { copy($this->img_src, $path); }

        }

        // Save GIF
        elseif($this->format == "GIF")
        {

            if($this->resize) { imageGIF($this->img_output, $path); }
            else { copy($this->img_src, $path); }

        }

    }

    // Get width
    public function get_width()
    {

        return $this->x_input;

    }

    // Get height
    public function get_height()
    {

        return $this->y_input;

    }

    // Clear image cache
    public function clear_cache()
    {

        @ImageDestroy($this->img_input);
        @ImageDestroy($this->img_output);

    }

}
?>

[martinm_92]

Anyone?

[litebearer]

here is the resize function I use...

<?php 
function Resize_Image($save,$file,$t_w,$t_h,$s_path,$o_path) { 
$s_path = trim($s_path); 
$o_path = trim($o_path); 
$save = $s_path . $save; 
$file = $o_path . $file; 
$ext = strtolower(end(explode('.',$save))); 
list($width, $height) = getimagesize($file) ; 
if(($width>$t_w) OR ($height>$t_h)) { 
	$r1 = $t_w/$width; 
	$r2 = $t_h/$height; 
	if($r1<$r2) { 
		$size = $t_w/$width; 
	}else{ 
		$size = $t_h/$height; 
	} 
}else{ 
	$size=1; 
} 
$modwidth = $width * $size; 
$modheight = $height * $size; 
$tn = imagecreatetruecolor($modwidth, $modheight) ; 
switch ($ext) { 
	case 'jpg': 
	case 'jpeg': 
		$image = imagecreatefromjpeg($file) ; 
		break; 
	case 'gif': 
		$image = imagecreatefromgif($file) ; 
		break; 
	case 'png': 
		$image = imagecreatefrompng($file) ; 
		break; 
} 
imagecopyresampled($tn, $image, 0, 0, 0, 0, $modwidth, $modheight, $width, $height) ; 
imagejpeg($tn, $save, 100) ; 
return; 
} 
/* end of function */

/*

Example usage 

*/

$save = 'myfile.jpg'; /* set original file name here */
$file = $newfile; /* set new file name here */
$t_w = 120; /* set max thumb width here */
$t_h = 120; /* set max thumb height here */
$o_path = "upload/"; /* set path to original file here */ 
$s_path = "upload/thumb/"; /* set path to new file here */

Resize_Image($save,$file,$t_w,$t_h,$s_path,$o_path); 
?> 

[martinm_92]

Oh this is much better thanks mate Is it possible to resize the image twice? So I can have a smaller 50x50 thumbnail image? Im pretty sure that resizing and cropping to a square image is a whole different thing but can I add another part to the form that resizes a new image with a max height and width of 50?

[litebearer]

you can resize as many times as you want.

NOTE: resizing an image to identical width and height, when they are not identical to start, will generate a distorted image. Might aso look into 'cropping'

[martinm_92]

Yeah I thought cropping would be it... So how do I do multiple crops?

 

$save .=

 

Something like that?

[litebearer]

The problem with cropping is determing what area of the image you want to 'capture'. Not all images have the center as their 'focal point', as such, using the center may not convey the idea/concept of the full image.

[martinm_92]

Sorry I meant how do i do multiple resizing

 

Is it something like:

 

<?php
include("class.imaging.php");

$file = $newfile;
$filename = $dir . $file;

/* Profile Picture */
$save = $filename;
$t_w = 380;
$t_h = 137;
$o_path = "upload/"; 
$s_path = "upload/newfile/";

/* Thumbnail */
$save .= $filename;
$t_w .= 50;
$t_h .= 50;
$o_path .= "upload/"; 
$s_path .= "upload/thumb/";

Resize_Image($save,$file,$t_w,$t_h,$s_path,$o_path);
?>

 

I've tested that and it doesn't work... but is it something similar?

[litebearer]

Where are you defining the "Resize_Image" function?

[martinm_92]

Its in the same file, i just took it out for the purposes of cutting it down to show you.

[litebearer]

/* Profile Picture */
$file = SOME IMAGE; /* this the name of the ORIGINAL image WITHOUT path info*/
$save = $filename; /* This is the name you want to save as WITHOUT path info */
$t_w = 380;
$t_h = 137;
$o_path = "upload/";  /* This is the path to the ORIGINAL image */
$s_path = "upload/newfile/"; /* This is the path where you want the resized image saved */
Resize_Image($save,$file,$t_w,$t_h,$s_path,$o_path);


/* Thumbnail */
/* this will take the image saved in the above code and create a thumb in a different folder */
/* being as they are in different folders, we can use the same name, just different pathes */
/* that way you only need to enter the name in your database once. You will adjust your */
/* code to determine which version you are displaying */
$t_w = 50;
$t_h = 50;
$o_path = "upload/newfile/"; 
$s_path = "upload/thumb/";

Resize_Image($save,$file,$t_w,$t_h,$s_path,$o_path);

[martinm_92]

Thanks for the help mate

[martinm_92]

uh... that's not actually working It uploads the original file and puts it in the upload folder, but doesn't resize and no images show in the newfile or thumb folders...

 

 

[litebearer]

please show the ENTIRE code you are using - starting with the form thru the end

[martinm_92]

<form name="form_upload" method="POST" enctype="multipart/form-data">
<table width="100%" cellpadding="0" cellspacing="3" border="0">
<tr>
    	<td colspan="2"><h1>Upload Profile Picture</h1></td>
    </tr>
    <tr>
    	<td align="right"><p>Image title:</p></td>
        <td align="left"><input type="text" name="title" class="editinput" /></td>
    </tr>
    <tr>
    	<td align="right"><p>Upload:</p></td>
        <td align="left"><input type="file" name="file" class="editinput" /></td>
    </tr>
    <tr>
    	<td> </td>
        <td><input type="submit" value="Upload" class="editSubmit" name="upload" /></td>
    </tr>
    <tr>
    	<td> </td>
    	<td>
        <?php
        if($_POST['upload']){
		if($_SERVER['REQUEST_METHOD'] == 'POST'){
			if(($_FILES['file']['type'] == "image/gif")
			|| ($_FILES['file']['type'] == "image/jpeg")
			|| ($_FILES['file']['type'] == "image/png")
			|| ($_FILES['file']['type'] == "image/pjpeg")){
				if($_FILES['file']['error'] > 0){
					echo "Return Code: " . $_FILES['file']['error'] . "<br>";
				}else{
					$title = $_POST['title'];
					$oldfile = $_FILES['file']['name'];
					$ext = pathinfo($_FILES['file']['name'], PATHINFO_EXTENSION);

					$newfile = md5(time()) . "." . $ext;
					$thumb = md5(time()) . "." . $ext;

					if(move_uploaded_file($_FILES['file']['tmp_name'], "./upload/".$newfile)){
						mysql_query("INSERT INTO `images` (`userid`, `title`, `oldfile`, `newfile`, `thumb`) VALUES ('".$session_id."', '".$title."', '".$oldfile."', '".$newfile."', '".$thumb."')");
						include("image_resize.php");
						echo "<p>Upload successful!</p>";
					}else{
						echo "<p>Failure</p>";
					}
				}
			}else{
				echo "<p>Invalid file type!</p>";
			}
		}
	}
	?>
        </td>
    </tr>
</table>
</form>

<?php
function Resize_Image($save,$file,$t_w,$t_h,$s_path,$o_path) { 
$s_path = trim($s_path); 
$o_path = trim($o_path); 
$save = $s_path . $save; 
$file = $o_path . $file; 
$ext = strtolower(end(explode('.',$save))); 
list($width, $height) = getimagesize($file) ; 
if(($width>$t_w) OR ($height>$t_h)) { 
	$r1 = $t_w/$width; 
	$r2 = $t_h/$height; 
	if($r1<$r2) { 
		$size = $t_w/$width; 
	}else{ 
		$size = $t_h/$height; 
	} 
}else{ 
	$size=1; 
} 
$modwidth = $width * $size; 
$modheight = $height * $size; 
$tn = imagecreatetruecolor($modwidth, $modheight) ; 
switch ($ext) { 
	case 'jpg': 
	case 'jpeg': 
		$image = imagecreatefromjpeg($file) ; 
		break; 
	case 'gif': 
		$image = imagecreatefromgif($file) ; 
		break; 
	case 'png': 
		$image = imagecreatefrompng($file) ; 
		break; 
} 
imagecopyresampled($tn, $image, 0, 0, 0, 0, $modwidth, $modheight, $width, $height) ; 
imagejpeg($tn, $save, 100) ; 
return; 
}

$file = $newfile;
$filename = $dir . $file;

/* Profile Picture */
$save = $filename;
$t_w = 380;
$t_h = 137;
$o_path = "upload/"; 
$s_path = "upload/newfile/";

/* Thumbnail Picture */
$t_w = 50;
$t_h = 50;
$o_path = "upload/newfile/"; 
$s_path = "upload/thumb/";

Resize_Image($save,$file,$t_w,$t_h,$s_path,$o_path);
?>