Avatar Size Restraints

[soshannad]

Hello!

I just followed your avatar system tutorial and everything is working great, however, in my website I need the image to be constrained to 75px high. I'm wondering if perhaps, there's a way to constrain it to the height rather than the width..

I have more room to play on width, but the height is non-negotiable.

Ideally it'd be 75px high x max-width of 150px or so.

Is this possible?

//updates the current users profile info
function set_profile_info($email, $about, $location, $avatar){
	$email 		= mysql_real_escape_string(htmlentities($email));
	$about 		= mysql_real_escape_string(nl2br(htmlentities($about)));
	$location 	= mysql_real_escape_string($location);

	if (file_exists($avatar)){
		$src_size = getimagesize($avatar);
		
		if ($src_size['mime'] === 'image/jpeg'){
			$src_img = imagecreatefromjpeg($avatar);
		}else if ($src_size['mime'] === 'image/png'){
			$src_img = imagecreatefrompng($avatar);
		}else if ($src_size['mime'] === 'image/gif'){
			$src_img = imagecreatefromgif($avatar);
		}else{
			$src_img = false;
		}
		
		if ($src_img !== false){
			$thumb_width = 75;
			
			if ($src_size[0] <= $thumb_width){
				$thumb = $src_img;
			}else{
			     $new_size[0] = $thumb_width;
				 $new_size[1] = ($src_size[1] / $src_size[0]) * $thumb_width;
				
				$thumb = imagecreatetruecolor($new_size[0], $new_size[1]);
				imagecopyresampled($thumb, $src_img, 0, 0, 0, 0, $new_size[0], $new_size[1], $src_size[0], $src_size[1]);
			}
			
			imagejpeg($thumb, "{$GLOBALS['path']}/user_avatars/{$_SESSION['uid']}.jpg");
			
		}
	}
	
	$sql = "UPDATE `users` SET
				`user_email` = '{$email}',
				`user_about` = '{$about}',	
				`user_location` = '{$location}'
			WHERE `user_id` = {$_SESSION['uid']}";
			
			mysql_query($sql);
		
		    
}

[jacek]

You basically need to do the opposite

                        $thumb_height = 75;
                       
                        if ($src_size[1] <= $thumb_height){
                                $thumb = $src_img;
                        }else{
                             $new_size[1] = $thumb_height;
                                 $new_size[0] = ($src_size[0] / $src_size[1]) * $thumb_height;
                               
                                $thumb = imagecreatetruecolor($new_size[0], $new_size[1]);
                                imagecopyresampled($thumb, $src_img, 0, 0, 0, 0, $new_size[0], $new_size[1], $src_size[0], $src_size[1]);
                        }

Try something like that, the logc is that you need to fix the height to 75 and then work out how wide it should be based on the aspect ratio.

[soshannad]

That worked like a charm, thank you!

Is there a way to implement the max-width?

[jacek]

Is there a way to implement the max-width?

Sure, once you have calculated the new width, check to see if it is greater than some limit.