Scale image to Fit certain width and height

[louis567]

Does anyone know how to scale an image to fit a certain a size and center it, then fill the remainder in white so I always have the same size image with aspect ratio remaining?

 

Thanks. Would help me a lot.

[AV1611]

Do you mean with GD?

 

Otherwise, you can just use html/css to do it

[louis567]

Umm what GU??? If I use CSS/HTML it will lose quality which I would rather not lose. Is there any image manipulation functions in PHP that allow me to scale it to a certain size but maintaining the ratio???

[jellis]

You can start with something like this and customise it to suit your needs.

 

As for filling the background with white, you'd be better off setting the background area to white with css/html rather than insist the server do all of that extra image processing work.

 

Most of the stuff inside that script is pretty self explanatory and if you've got a single nuance of php ability you should be able to work it out.

[louis567]

Maybe its not possible in PHP.

 

You can do this in ColdFusion! ColdFusion > PHP anyday.

 

You get what you pay for I say. I prefer a better scripting language thats why I shall use ColdFusion.

[~n[EO]n~]

It is possible in PHP (anything is possible in PHP  )

 

check this function

<?php
function ImageResize($filepath,$savefilepath,$imagetype,$w,$h)
{
$filename=$filepath;
$full_url=$savefilepath;
// Get new dimensions
list($width, $height) = getimagesize($filename);
// image width
$sw = $width;//$x[0];
// image height
$sh = $height;//$x[1];
    $percent=0;
$fixH=0;
$fixW=0;
if ($percent > 0) {
    // calculate resized height and width if percent is defined
    $percent = $percent * 0.01;
    $w = $sw * $percent;
    $h = $sh * $percent;
} else {
    if($sw>$sh){
	if($sw>$w){//--take ration
		$fixW=$w;
		$fixH=($w/$sw)*$sh;
		if($fixH>$h){
			$imageErr=0;
			return $imageErr;
		}
	}
	elseif($sw<=$w){
		if($sh>$h){
			$imageErr=1;
			return $imageErr;
		}
		else{
			$fixH=$sh;
			$fixW=$sw;
		}
	}
}
elseif($sw<=$sh){
	if($sh>$h){//--take ration
		$fixH=$h;
		$fixW=round(($h/$sh)*$sw,2);

		if($fixW>$w){
			$imageErr=2;
			return  $imageErr;
		}
	}
	elseif($sh<=$h){
		if($sw>$w){
			$imageErr=3;
			return  $imageErr;
		}
		else{
			$fixH=$sh;
			$fixW=$sw;
		}
	}
}
}




$new_width=$fixW;
$new_height=$fixH;

//echo $fixH."s".$fixW;
//exit;
// Resample
$image_p = imagecreatetruecolor($new_width, $new_height);

if(strtolower($imagetype)=="jpg"||strtolower($imagetype)=="jpeg"){
$image = imagecreatefromjpeg($filename);
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
//imagejpeg($image_p, null, 100);

imagejpeg($image_p,$full_url,100);
}
elseif(strtolower($imagetype)=="gif"){	
$image = imagecreatefromgif($filename);
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
imagegif($image_p,$full_url,100);
}
elseif(strtolower($imagetype)=="png"){
$image = imagecreatefrompng($filename);
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
imagepng($image_p,$full_url,100);
}

imagedestroy($image); 
$imageErr=-1;
return $imageErr;



}?>