function paste(img $draw, $dest_x, $dest_y, $src_x = null, $src_y = null, $dest_w = null, $dest_h = null, $src_w = null, $src_h = null)
{
// default is to paste the image cleanly at dest_x, dest_y
if ($src_x === null) {
$src_x = $src_y = 0;
$dest_w = $src_w = $draw->getWidth();
$dest_h = $src_h = $draw->getHeight();
}
// paste the image
imagecopyresampled($this->img, $draw->img, $dest_x, $dest_y, $src_x, $src_y, $dest_w, $dest_h, $src_w, $src_h);
}
static function transform_image($spath, $dpath, $data)
{
$datas = explode(':', $data);
$srcWidth = $datas[0];
$srcHeight = $datas[1];
$srcX = $datas[2];
$srcY = $datas[3];
$dstWidth = $datas[4];
$dstHeight = $datas[5];
img::load($spath);
$origWidth = img::getWidth();
$origHeight = img::getHeight();
$xRatio = $origWidth / $srcWidth;
$yRatio = $origHeight / $srcHeight;
$srcWidth = $dstWidth * $xRatio;
$srcHeight = $dstHeight * $yRatio;
$srcX = $srcX * $xRatio;
$srcY = $srcY * $yRatio;
img::transform($srcX, $srcY, $srcWidth, $srcHeight, $dstWidth, $dstHeight);
img::save($dpath);
img::unload();
}