<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - inkscape fails to print thin lines to PDF"
href="https://bugs.freedesktop.org/show_bug.cgi?id=77298">77298</a>
</td>
</tr>
<tr>
<th>Assignee</th>
<td>ajohnson@redneon.com
</td>
</tr>
<tr>
<th>Summary</th>
<td>inkscape fails to print thin lines to PDF
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>cairo-bugs@cairographics.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jnweiger@gmail.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>1.12.16
</td>
</tr>
<tr>
<th>Component</th>
<td>pdf backend
</td>
</tr>
<tr>
<th>Product</th>
<td>cairo
</td>
</tr></table>
<p>
<div>
<pre>Since 1.12.3, cairo cannot render fine lines to pdf. 1.12.2 was the last
version that worked.
<a href="http://cgit.freedesktop.org/cair/diff/?id=bdf83008f4b2c723fd8e65e2a92bc47a2e7bc442">http://cgit.freedesktop.org/cair/diff/?id=bdf83008f4b2c723fd8e65e2a92bc47a2e7bc442</a>
introduced this code in cairo-compositor.c:_cairo_compositor_stroke
if (_cairo_pen_vertices_needed (tolerance, style->line_width/2, ctm) <= 1)
return CAIRO_INT_STATUS_NOTHING_TO_DO;
The idea was to avoid lines that would be invisible when rasterized. While this
is a valid logic for raster backends, it is a bad idea for PDF output. There we
want to see all fine lines.
My specific use case is generating a lasercutter drawing for an Epilog Zing
laser with inkscape. There the hardware would raster anything thicker than
0.02mm, and cut 0.01mm or below. 1.12.3 skips lines below 0.036mm, 1.13.1 skips
lines below 0.018mm -- which is still not enough to safely drive my
lasercutter.
See also <a href="https://bugs.launchpad.net/inkscape/+bug/1174909">https://bugs.launchpad.net/inkscape/+bug/1174909</a>
Check out the attached reproducer.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
</ul>
</body>
</html>