/** * Returns a cropped image * * @param GDImage_Image $img * @param smart_coordinate $left * @param smart_coordinate $top * @param smart_coordinate $width * @param smart_coordinate $height * @return GDImage_Image */ function execute($img, $left, $top, $width, $height) { $width = GDImage_Coordinate::fix($width, $img->getWidth(), $width); $height = GDImage_Coordinate::fix($height, $img->getHeight(), $height); $left = GDImage_Coordinate::fix($left, $img->getWidth(), $width); $top = GDImage_Coordinate::fix($top, $img->getHeight(), $height); if ($left < 0) { $width = $left + $width; $left = 0; } if ($width > $img->getWidth() - $left) { $width = $img->getWidth() - $left; } if ($top < 0) { $height = $top + $height; $top = 0; } if ($height > $img->getHeight() - $top) { $height = $img->getHeight() - $top; } if ($width <= 0 || $height <= 0) { JError::raiseError(500, JText::_('JLIB_GDIMAGE_ERROR_CAN_NOT_CROP_OUTSIDE')); return false; } $new = $img->doCreate($width, $height); if ($img->isTransparent() || $img instanceof GDImage_PaletteImage) { $new->copyTransparencyFrom($img); imagecopyresized($new->getHandle(), $img->getHandle(), 0, 0, $left, $top, $width, $height, $width, $height); } else { $new->alphaBlending(false); $new->saveAlpha(true); imagecopyresampled($new->getHandle(), $img->getHandle(), 0, 0, $left, $top, $width, $height, $width, $height); } return $new; }