[dev-context] regression testing: page image differences

Aditya Mahajan adityam at umich.edu
Tue Feb 6 00:56:20 CET 2007


On Mon, 5 Feb 2007, Sanjoy Mahajan wrote:

> Here are output differences between 20070112 and 20070123, mostly to
> test the regression tests.  Here's how to decode it.  The line
>
>  WARN: tex/context/base/math-pln.tex/test-001-20070112-20070123.report
>
> means tex/context/base/math-pln.tex/test-001.tex was run through
> 20070112 and 20070123 to make pdf files, converted to bitmaps, and
> subtracted (page by page), and that there were some differences.  The
> line
>
>    [p.0001] 0.176462 dB diff [see png's in /tmp/tmp.mRMxS24124/]
>
> menas that p.1 was different in the two runs, but only slightly (about
> 0.2 dB).  Here another example with a slightly larger dB difference:

Could it be because of the differences between lm-math and cm-math 
fonts?

Aditya


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