$maxWidth)
{
$newWidth = $basedOnWidth['width'];
$newHeight = $basedOnWidth['height'];
$y = round($maxHeight / 2) - round($newHeight / 2);
}
else
{
$newWidth = $basedOnHeight['width'];
$newHeight = $basedOnHeight['height'];
$x = round($maxWidth / 2) - round($newWidth / 2);
}
$destinationImage = imageCreateTrueColor($maxWidth, $maxHeight);
if ($background === null)
{
$background = imagecolorallocate($destinationImage, 255, 255, 255);
}
imageFill($destinationImage, 1, 1, $background);
imageCopyResampled($destinationImage, $image, $x, $y, 0,0, $newWidth, $newHeight, $width, $height);
return $destinationImage;
}
/**
* This will crop an image to a particular (square) size, instead of padding it
* Like the above function, this resizes an image. Aspect ratio of the pixel data
* is retained (i.e. you won't get any crazy streching of the image), but the actual
* aspect ratio is discarded at the end.
*@param imageFile string absolute path to the image file
*@param resizeTo int width AND height to resize the image to.
*@returns A TrueColor GD Image that is the cropped and resampled, or false if source image is not an image
*/
function cropImageToSize($imageFile, $resizeTo)
{
if (!list($width, $height, $type) = getimagesize($imageFile))
{
trigger_error("Warning: image $imageFile is not an image!", E_USER_WARNING);
return false;
}
if (!$image = createToGdImage($imageFile))
{
trigger_error("Error: Could not create image from file $imageFile!", E_USER_ERROR);
return false;
}
if ($width < $height)
{
$size = $width;
$x = 0;
$y = ($height - $width) / 2;
}
else
{
$size = $height;
$y = 0;
$x = ($width - $height) / 2;
}
$destinationImage = imageCreateTrueColor($resizeTo, $resizeTo);
imageCopyResampled($destinationImage, $image,
0,0, // Destination Origin
$x, $y, // Source Origin
$resizeTo, $resizeTo, // Destination Size
$size, $size // Source Size
);
return $destinationImage;
}
/**
* given an image file, it will return a GD image from it
*@param imageFile string path to the image file to turn into a gd image
*@returns resource A GD image
*/
function createToGdImage($imageFile)
{
if (function_exists("exif_imagetype"))
{
$type = exif_imagetype($imageFile);
}
else
{
list($dummy_w,$dummy_h,$type,$dummy_html) = getimagesize($imageFile);
}
switch($type)
{
case IMAGETYPE_GIF:
return imageCreateFromGif($imageFile);
case IMAGETYPE_JPEG:
return imageCreateFromJpeg($imageFile);
case IMAGETYPE_PNG:
return imageCreateFromPng($imageFile);
default:
trigger_error("Error: unsupported image type: ".image_type_to_mime_type($type)." in fitImageToSize.", E_USER_WARNING);
return false;
}
}
?>
