/**
* #2063 - get_resized_image_from_existing_file() fails asked for image larger than selection and not scaling an image up
* Test get_image_resize_parameters().
*/
public function testElggResizeImage()
{
$orig_width = 100;
$orig_height = 150;
// test against selection > max
$options = array('maxwidth' => 50, 'maxheight' => 50, 'square' => true, 'upscale' => false, 'x1' => 25, 'y1' => 75, 'x2' => 100, 'y2' => 150);
// should get back the same x/y offset == x1, y1 and an image of 50x50
$params = get_image_resize_parameters($orig_width, $orig_height, $options);
$this->assertEqual($params['newwidth'], $options['maxwidth']);
$this->assertEqual($params['newheight'], $options['maxheight']);
$this->assertEqual($params['xoffset'], $options['x1']);
$this->assertEqual($params['yoffset'], $options['y1']);
// test against selection < max
$options = array('maxwidth' => 50, 'maxheight' => 50, 'square' => true, 'upscale' => false, 'x1' => 75, 'y1' => 125, 'x2' => 100, 'y2' => 150);
// should get back the same x/y offset == x1, y1 and an image of 25x25 because no upscale
$params = get_image_resize_parameters($orig_width, $orig_height, $options);
$this->assertEqual($params['newwidth'], 25);
$this->assertEqual($params['newheight'], 25);
$this->assertEqual($params['xoffset'], $options['x1']);
$this->assertEqual($params['yoffset'], $options['y1']);
}
/**
* Gets the jpeg contents of the resized version of an already uploaded image
* (Returns false if the file was not an image)
*
* @param string $input_name The name of the file on the disk
* @param int $maxwidth The desired width of the resized image
* @param int $maxheight The desired height of the resized image
* @param bool $square If set to true, takes the smallest of maxwidth and
* maxheight and use it to set the dimensions on the new image.
* If no crop parameters are set, the largest square that fits
* in the image centered will be used for the resize. If square,
* the crop must be a square region.
* @param int $x1 x coordinate for top, left corner
* @param int $y1 y coordinate for top, left corner
* @param int $x2 x coordinate for bottom, right corner
* @param int $y2 y coordinate for bottom, right corner
* @param bool $upscale Resize images smaller than $maxwidth x $maxheight?
*
* @return false|mixed The contents of the resized image, or false on failure
*/
function get_resized_image_from_existing_file($input_name, $maxwidth, $maxheight, $square = FALSE, $x1 = 0, $y1 = 0, $x2 = 0, $y2 = 0, $upscale = FALSE)
{
// Get the size information from the image
$imgsizearray = getimagesize($input_name);
if ($imgsizearray == FALSE) {
return FALSE;
}
$width = $imgsizearray[0];
$height = $imgsizearray[1];
$accepted_formats = array('image/jpeg' => 'jpeg', 'image/pjpeg' => 'jpeg', 'image/png' => 'png', 'image/x-png' => 'png', 'image/gif' => 'gif');
// make sure the function is available
$load_function = "imagecreatefrom" . $accepted_formats[$imgsizearray['mime']];
if (!is_callable($load_function)) {
return FALSE;
}
// get the parameters for resizing the image
$options = array('maxwidth' => $maxwidth, 'maxheight' => $maxheight, 'square' => $square, 'upscale' => $upscale, 'x1' => $x1, 'y1' => $y1, 'x2' => $x2, 'y2' => $y2);
$params = get_image_resize_parameters($width, $height, $options);
if ($params == FALSE) {
return FALSE;
}
// load original image
$original_image = $load_function($input_name);
if (!$original_image) {
return FALSE;
}
// allocate the new image
$new_image = imagecreatetruecolor($params['newwidth'], $params['newheight']);
if (!$new_image) {
return FALSE;
}
// color transparencies white (default is black)
imagefilledrectangle($new_image, 0, 0, $params['newwidth'], $params['newheight'], imagecolorallocate($new_image, 255, 255, 255));
$rtn_code = imagecopyresampled($new_image, $original_image, 0, 0, $params['xoffset'], $params['yoffset'], $params['newwidth'], $params['newheight'], $params['selectionwidth'], $params['selectionheight']);
if (!$rtn_code) {
return FALSE;
}
// grab a compressed jpeg version of the image
ob_start();
imagejpeg($new_image, NULL, 90);
$jpeg = ob_get_clean();
imagedestroy($new_image);
imagedestroy($original_image);
return $jpeg;
}
