<p>Hello,</p>
<p>I'm trying to connect the output of two packages, but having problems to do so.
I'm creating a plot with the gonum/plot package. There are options to save the plot as jpg or pdf format, and the possibility to write the output to an IO writer:</p>
<pre><code>c := vgpff.New(3*vg.Inch, 3*vg.Inch)
p.Draw(draw.New(c))
// Write the Canvas to a io.Writer (in this case, os.Stdout).
if _, err := c.WriteTo(os.Stdout);
</code></pre>
<p>now what I want embedd this PDF into another PDF that I created with the jung-kurt/gofpdf package, since I want to add extra info to the plot, like header etc.</p>
<p>The gofpdf package has a method to write to a PDF file directly from a buffer:</p>
<pre><code>func (f *Fpdf) RawWriteBuf(buf *bytes.Buffer)
</code></pre>
<p>My question is, is it possible to write the plot data to a buffer and use the RawWriteBuf method to embedd this data into my PDF file?</p>
<p>If yes, how could I wrap the WriteTo method so it writes to a buffer?</p>
<hr/>**评论：**<br/><br/>tiberiousr: <pre><pre><code>var b *bytes.Buffer
c.WriteTo(b)
f.RawWriteBuf(b)
</code></pre>
<p>Something like that anyway</p></pre>
