/**
* Calculates the cropping rectangle and the scaled size for an input image size.
*
* @param int[] $in_size - two element array of input dimensions (width, height)
* @param string $coi - four character encoded string containing the center of interest (unused if max_crop=0)
* @param ImageRect &$crop_rect - ImageRect containing the cropping rectangle or null if cropping is not required
* @param int[] &$scale_size - two element array containing width and height of the scaled image
*/
function compute($in_size, $coi, &$crop_rect, &$scale_size)
{
$destCrop = new ImageRect($in_size);
if ($this->max_crop > 0) {
$ratio_w = $destCrop->width() / $this->ideal_size[0];
$ratio_h = $destCrop->height() / $this->ideal_size[1];
if ($ratio_w > 1 || $ratio_h > 1) {
if ($ratio_w > $ratio_h) {
$h = $destCrop->height() / $ratio_w;
if ($h < $this->min_size[1]) {
$idealCropPx = $destCrop->width() - floor($destCrop->height() * $this->ideal_size[0] / $this->min_size[1]);
$maxCropPx = round($this->max_crop * $destCrop->width());
$destCrop->crop_h(min($idealCropPx, $maxCropPx), $coi);
}
} else {
$w = $destCrop->width() / $ratio_h;
if ($w < $this->min_size[0]) {
$idealCropPx = $destCrop->height() - floor($destCrop->width() * $this->ideal_size[1] / $this->min_size[0]);
$maxCropPx = round($this->max_crop * $destCrop->height());
$destCrop->crop_v(min($idealCropPx, $maxCropPx), $coi);
}
}
}
}
$scale_size = array($destCrop->width(), $destCrop->height());
$ratio_w = $destCrop->width() / $this->ideal_size[0];
$ratio_h = $destCrop->height() / $this->ideal_size[1];
if ($ratio_w > 1 || $ratio_h > 1) {
if ($ratio_w > $ratio_h) {
$scale_size[0] = $this->ideal_size[0];
$scale_size[1] = floor(1.0E-6 + $scale_size[1] / $ratio_w);
} else {
$scale_size[0] = floor(1.0E-6 + $scale_size[0] / $ratio_h);
$scale_size[1] = $this->ideal_size[1];
}
} else {
$scale_size = null;
}
$crop_rect = null;
if ($destCrop->width() != $in_size[0] || $destCrop->height() != $in_size[1]) {
$crop_rect = $destCrop;
}
}
