Centering the x and y ratio in images

Orc · 03-12-2008, 01:38 AM

I want to be able to figure out how to center images, by their x, y ratios using imagecopyresampled. How would I do this?

Rendair · 03-12-2008, 10:39 AM

One way you can find the center point of an image is to find the width and height and divide by 2

PHP Code:


			
$size = getimagesize($filename);
$width = $size[0];
$height = $size[1];

$x = $width / 2;
$y = $height / 2;

Thats the way i have always done it anyway

You can always look at something like this

PHP Code:


			
// The file
$filename = 'test.jpg';
$percent = 0.5;

// Content type
header('Content-type: image/jpeg');

// Get new dimensions
list($width, $height) = getimagesize($filename);
$new_width = $width * $percent;
$new_height = $height * $percent;

// Resample
$image_p = imagecreatetruecolor($new_width, $new_height);
$image = imagecreatefromjpeg($filename);
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);

// Output
imagejpeg($image_p, null, 100);

Gareth · 03-12-2008, 02:04 PM

There you have it, from the resident GD guru himself! x

Wildhoney · 03-12-2008, 03:04 PM

Lol

Rendair loves his GD, doesn't he.

Orc · 03-12-2008, 04:43 PM

$_GET['w'] and $_GET['h'] are defined xD
plus my images are from db