Unless someone knows the answer to your question, we'll have to generate
some SVG files and see how they look across diff platforms. For me,
that requires other people with the other platforms installed, as I am
only running Windows 7. Are there particular PNGs that are problematic
and that should be tested first across platforms?
--
James
On 4/27/2016 2:50 AM, Lasconic wrote:
So in my previous comment, I was wondering if it would make sense to
add SVG or replace PNGs by SVGs in the mtest.
I thought that it would solve a recurring problem: pngs rendered on
different platforms looks different, and so when we "diff" them pixel
by pixels we don't get blank files but some pixels are different. So
the vtests are currently not automated, we need to check them from
time to time and see if there is a change. We don't have any automated
"red flag".
My hope was that diffing SVG (and so XML) would avoid this problem and
so we could automate the diff and raise a red flag if we find a
regression in the layout/drawing algorithm. I'm not sure if it's true
or not and if it's not, then we need to solve the root cause and find
why different OS gives different rendering...
lasconic
2016-04-26 22:17 GMT+02:00 Sideways Skullfinger
<[email protected]
<mailto:[email protected]>>:
So is the goal here simply to duplicate the vtests using SVG? Or
is there additional automation can be applied to the existing
process? If you're already automating the diff reporting, what
more does SVG actually offer you? Yes, it would test both the PNG
and SVG export processes, but relative to automation: I don't see
the difference between running a diff between two PNG files vs.
two text files. Am I missing something?
If it's just duplicating the existing vtests to use SVG, that
shouldn't be too hard.
--
Sideways
On 4/26/2016 2:06 PM, Marc Sabatella wrote:
vtests themselves are all created manually - the source files and
the reference graphics. The tests are run via the "gen" script in
the vtest folder - that's what actually generates the tests files
and diffs them against the reference. Go to vtest and type ./gen
(you might need to configure some things first so the script uses
the right version of MuseScore) and you'll see the tests being
run; at the end an HTML file is generated that you can inspect
manually.
On Tue, Apr 26, 2016 at 1:36 PM Sideways Skullfinger
<[email protected]
<mailto:[email protected]>> wrote:
On 4/22/2016 12:01 PM, Lasconic wrote:
> We don't have any SVG tests suite, but it's a good idea, we
could
> modify the vtests to render SVG too (or instead of PNG?)
> (If you don't know what the vtests are, check the vtests
directory and
> http://vtest.musescore.org/index.html)
>
> Diffing SVG is easier so we could even use them for
regression testing.
I now understand this a bit better, and want to understand it
fully in
order to make it happen. I assume the goal would be to add
SVG exports
to the mtests, and leave the PNG vtests around, at least for
now. But I
know very little about how all this is set up.
I now know that the automated testing is setup in the mtests
folder. I
am assuming that the vtest files are generated automatically
in mtests
somewhere, and I would need to duplicate that or add an SVG
export of
the same scores. Correct?
Then there is the automated diff process and reporting on
differences
encountered. Is there an existing way that this is done in
MuseScore?
Those are my questions for now, I'm sure I'll have more as I
get into it...
--
Sideways
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