     reading and writing it from shaders. <em class="parameter"><code>unit</code></em> specifies the zero-based index of the image
            unit to which to bind the texture level. <em class="parameter"><code>texture</code></em> specifies the name of an existing texture
            object to bind to the image unit. If <em class="parameter"><code>texture</code></em> is zero, then any existing binding to
            the image unit is broken. <em class="parameter"><code>level</code></em> specifies the level