de>.</p>
</div>
<ul class="info-attributes">
<li><b>Raises</b> <code>Invalid_argument</code> if <code class="code">pos</code> and <code class="code">len</code> do not designate a
    valid range of <code class="code">s</code>.</li>
</ul>
</div>

<pre id="VALblit">val blit : src:bytes -&gt; src_pos:int -&gt; dst:bytes -&gt; dst_pos:int -&gt; len:int -&gt; unit</pre><div class="info ">
<div class="info-desc">
<p><code class="code">blit&nbsp;~src&nbsp;~src_pos&nbsp;~dst&nbsp;~dst_pos&nbsp;~len</code> copies <c