public static function magick_resize_image($convert, $src_fn, $resized_fn, $max_x, $max_y, $resize_type = RESIZE_CROP)
{
Logger::log("Resizing {$src_fn} to {$resized_fn} using ImageMagick");
if (!$convert) {
$convert = ImageResize::find_magick();
}
list($w, $h) = getimagesize($src_fn);
$x_scale = floatval($max_x) / floatval($w);
$y_scale = floatval($max_y) / floatval($h);
switch ($resize_type) {
case RESIZE_STRETCH:
$args = "-geometry {$max_x}x{$max_y}!";
break;
case RESIZE_CROP:
case RESIZE_CROP_NO_EXPAND:
case RESIZE_CROP_NO_SCALE:
// first crop the input image, then resize that to fit the output
$scale = max($x_scale, $y_scale);
if ($resize_type == RESIZE_CROP_NO_EXPAND) {
$scale = min(1.0, $scale);
}
if ($resize_type == RESIZE_CROP_NO_SCALE) {
$scale = 1.0;
}
// convert output size into input coords
$input_max_x = min($w, intval(floatval($max_x) / $scale + 0.5));
$input_max_y = min($h, intval(floatval($max_y) / $scale + 0.5));
if ($resize_type == RESIZE_CROP_NO_EXPAND) {
$max_x = intval(floatval($input_max_x) * $scale + 0.5);
$max_y = intval(floatval($input_max_y) * $scale + 0.5);
}
// now find offsets
$input_x_offset = intval(($w - $input_max_x) / 2);
$input_y_offset = intval(($h - $input_max_y) / 2);
$args = "-crop {$input_max_x}x{$input_max_y}+{$input_x_offset}+{$input_y_offset} -geometry {$max_x}x{$max_y}!";
break;
case RESIZE_FIT:
$args = "-geometry {$max_x}x{$max_y}";
break;
case RESIZE_FIT_NO_EXPAND:
$max_x = min($max_x, $w);
$max_y = min($max_y, $h);
$args = "-geometry {$max_x}x{$max_y}";
break;
}
// call /usr/bin/convert and return an error if it fails
$cmd = $convert . ' ' . ImageResize::shell_escape($src_fn) . " {$args} " . ImageResize::shell_escape($resized_fn);
system($cmd, $retval);
if ($retval) {
throw new CNException(GENERAL_SOME_ERROR, "{$convert} returned error code {$retval} (for command: {$cmd})");
}
}
