ArrayBuffer to blob conversion : <p>I have a project where I need to display djvu schemas in browser.</p>

<p>I found this old <a href="https://github.com/lebedkin/minidjvu.js" rel="noreferrer">library on Github</a> which, as far as I understood, converts djvu files to bmp and then puts them into canvas element. </p>

<p>As I said, library is old(last commit was 5 years ago), so I need to make some corrections. Main problem is that lib uses obsolete BlobBuilder. </p>

<p>Steps I made to solve this problem:</p>

<ol>
<li>Decompress this library via Chrome DevTools</li>
<li>Initial error is at line 3774 <code>var c = "undefined" != typeof MozBlobBuilder ? MozBlobBuilder : "undefined" != typeof WebKitBlobBuilder ? WebKitBlobBuilder : console.log("warning: cannot build blobs")</code></li>
<li>I commented out this line</li>
<li>Next, I commented out line <code>c = new c;</code> and some of following lines too.</li>
</ol>

<p>So, now it looks this way(variable I is array buffer, and ololo1 and ololo2 are some kind of offset and limit)</p>

<pre><code>var c = new Blob(new Uint8Array(new Uint8Array(I,ololo1,ololo2)))
              , b = b.createObjectURL(c)
              , c = document.getElementById(kb)
              , f = c.getContext("2d")
              , h = new Image
              , g = a[Ea &gt;&gt; 2]
              , i = a[Fa &gt;&gt; 2]
              , j = c.width
              , k = Math.round(i * j / g);

            h.onload = function()
            {
                var a = g / j;
                4 &lt; a &amp;&amp; (a = 4);
                1 &gt; a &amp;&amp; (a = 1);
                f.globalAlpha = 1;

                for (N = 0; N &lt; a; N++)
                    f.drawImage(h, N, N, g - a + N, i - a + N, 0, 0, j, k),
                    f.globalAlpha *= 1 - 1 / a;
                R(h.complete, "Image /bmp.bmp could not be decoded")
            }
            ;
            h.onerror = function(errorMsg, url, lineNumber, column, errorObj) {
                console.log(errorMsg, url, lineNumber, column, errorObj);
                console.log("Image /bmp.bmp could not be decoded!")
            }           
            ;
</code></pre>

<p>And now I stuck at error "Image /bmp.bmp could not be decoded!"(throwed in h.onerror handler).</p>

<p>So, my question is: what I am doing wrong?</p>
