function sgThumbnail(&$img, $type)
{
$this->config = sgConfig::getInstance();
$this->image = $img;
$widthVar = "thumb_width_" . $type;
$heightVar = "thumb_height_" . $type;
$cropVar = "thumb_crop_" . $type;
$this->maxWidth = $this->config->{$widthVar};
$this->maxHeight = $this->config->{$heightVar};
if (isset($this->config->{$cropVar})) {
$this->forceSize = $this->config->{$cropVar};
}
if ($this->image == null) {
return;
}
$this->imagePath = $this->image->realPath();
$this->thumbPath = $this->config->base_path . Singapore::thumbnailPath($this->image->parent->id, $this->image->id, $this->maxWidth, $this->maxHeight, $this->forceSize);
$this->thumbURL = $this->config->base_url . Singapore::thumbnailPath($this->image->parent->id, $this->image->id, $this->maxWidth, $this->maxHeight, $this->forceSize);
//security check: make sure requested file is in galleries directory
if (!Singapore::isSubPath($this->config->base_path . $this->config->pathto_galleries, $this->imagePath) && !$this->image->isRemote()) {
return;
}
//security check: make sure $image has a valid extension
if (!$this->image->isRemote() && !preg_match("/.+\\.(" . $this->config->recognised_extensions . ")\$/i", $this->image->id)) {
return;
}
$this->calculateDimensions();
//link straight to image if it smaller than required size
if ($this->image->width <= $this->thumbWidth && $this->image->height <= $this->thumbHeight) {
$this->thumbURL = $this->image->realURL();
return;
}
$imageModified = @filemtime($this->imagePath);
$thumbModified = @filemtime($this->thumbPath);
if ($imageModified > $thumbModified || !$thumbModified) {
$this->buildThumbnail();
}
}
