stgx_1_1_image.html#a6fe6fb2fd7cb9cb5da5c2984420ea184">Image::isValid()</a>, <a class="el" href="classtgx_1_1_image.html#a4d9fb81a7daea71a80213f3aa5dbbb18">Image::setInvalid()</a>, <a class="el" href="classtgx_1_1_image.html#a89021aa0f6408e702be35ae342d6e190">Image::imageBox()</a>.</p>
<dl class="section note"><dt>Note</dt><dd>Creating image/sub-image is very fast and "cost free" so one should not refrain from creating Image/sub-images whenever needed ! It is the most efficient solution to clip/restrict any