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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - pdfimages adds a superfluous 0.5 to image ppi shown using -list (patch provided)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104861">104861</a>
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<th>Summary</th>
<td>pdfimages adds a superfluous 0.5 to image ppi shown using -list (patch provided)
</td>
</tr>
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<th>Product</th>
<td>poppler
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>All
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>utils
</td>
</tr>
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<th>Assignee</th>
<td>poppler-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>freedesktop.mrbax@spamgourmet.com
</td>
</tr></table>
<p>
<div>
<pre>Adding 0.5 to a double before formatting with "%5.0f" results in a rounding
error. Presumably it was originally done before truncating to int.
--- utils/ImageOutputDev.cc.old 2018-01-30 16:38:42.179170000 +0200
+++ utils/ImageOutputDev.cc 2018-01-30 16:39:13.506750000 +0200
@@ -234,13 +234,13 @@
double *mat = state->getCTM();
double width2 = mat[0] + mat[2];
double height2 = mat[1] + mat[3];
- double xppi = fabs(width*72.0/width2) + 0.5;
- double yppi = fabs(height*72.0/height2) + 0.5;
+ double xppi = fabs(width*72.0/width2);
+ double yppi = fabs(height*72.0/height2);
if (xppi < 1.0)
printf("%5.3f ", xppi);
else
printf("%5.0f ", xppi);
if (yppi < 1.0)
printf("%5.3f ", yppi);
else
printf("%5.0f ", yppi);</pre>
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