Resize image GD library ?

[ttmt]

Hi all

 

I'm using this code to resize an image to produce a thumbnail with the gd library

 

				$src_image = imagecreatefromjpeg($stored_image);
				//
				$new_thumb_width = 85;
				$new_thumb_height = 64; 
				$src_width = imagesx($src_image);
				$src_height = imagesy($src_image);
				//
				if($src_width > $src_height){
					$thumb_w = $new_thumb_width;
					$thumb_h = $src_height*($new_thumb_height/$src_width); 
				}
				if($src_width < $src_height){
					$thumb_w = $src_width*($new_thumb_width/$src_height);
					$thumb_h = $new_thumb_height;
				}
				if($src_width == $src_height){
					$thumb_w = $new_thumb_width;
					$thumb_h = $new_thumb_height;
				}
				//
				$thumb = imagecreatetruecolor($thumb_w, $thumb_h);
				imagecopyresampled($thumb, $src_image,0,0,0,0,$thumb_w, $thumb_h, $src_width, $src_height);
				imagejpeg($thumb, $stored_thumb);
				imagedestroy($src_image);
				imagedestroy($thumb);
//
				echo $thumb_w;
				echo "<br/>";
				echo $thumb_h;

 

I want the thumbnails to be 85 x 64 but they are coming out 85 x 48

 

Can anyone see why this isn't working, or another way I might be able to do it.

 

It's part of a photo gallery where the images could be different sizes but I wanted to keep the thumbnails a uniformed.

 

Any help appreicated.

[DeanWhitehouse]

Try

<?php
$src_image = imagecreatefromjpeg($stored_image);

$new_thumb_width = 85;

$new_thumb_height = 64; 

list($width, $height) = getimagesize($src);
    
$thumb_w = $new_thumb_width;

$thumb_h = $new_thumb_height;    

$thumb = imagecreatetruecolor($thumb_w, $thumb_h);

imagecopyresampled($thumb, $src_image,0,0,0,0,$thumb_w, $thumb_h, $width, $height);

imagejpeg($thumb);

imagedestroy($src_image);

imagedestroy($thumb);

echo $thumb_w;

echo "<br/>";

echo $thumb_h;
?>

[printf]

Your example does a ratio resize, maintaining the original aspect ratio, (no cropping or squeezing of the image), only resize down to the nearest ratio if image height > output ratio height Or image width > output ratio width. Which is the best way to do it so the image looks nice...

[ttmt]

printf

 

Are you saying the way I'm doing it is the best way to do it or is there another way - I still can't get it to work.

 

 

[printf]

You have three options

 

1. resize to a certain width (maintain aspect ration)

2. resize to a certain height (maintain aspect ration)

3. resize to a set width and height (ignoring the aspect ratio)

 

 

option (1, 2) allows the image to maintain its natural look while resizing it, but the height or width will only be determined by the ratio of your (restriction) set height or width, option (3) will ignore the aspect ratio and stretch or squash the image to your (restricted) height and width! So which one do you want?

[gevans]

Alternatively you can take a cut of the image to get the aspect ratio that you require and resize that for your thumbnail so you get a cut view of the image, leaving the full res image available for full viewing

[printf]

Thanks gevans, I didn't think of that. So you have (4) options, which one do you want?

[ttmt]

I think

 

1. resize to a certain height (maintain aspect ration)

 

Then the thumbnail spacing will adjust depending on the width.