On Fri, Mar 7, 2014 at 10:28 AM, Nicola Lagomarsini <
nicola.lagomars...@geo-solutions.it> wrote:
> Hi all,
>
> I'm going to show some images for comparing the old wmsTileFuser class and
> its modified version, both in *fullWMS* mode enabled.
>
> I made the *fullWMS* parameter configurable from the geowebcache.xml file
> by adding the <fullWMS>TRUE(or FALSE)</fullWMS> field.
>
> I added the possibility for the user to change the image quality by
> setting an additional WMS parameter called *hints*. The user can choose
> one of the 3 following values: *speed*, *default*, *quality*.
>
> The first image represents the result of a WMS request on a vectorial
> layer, in image/png format. The other 3 images represent the same WMS
> request with the new WMS parameter.
>
> The second image value represents the result with the *speed* value which
> takes minor time without any care about the quality.
> The third image (*default* value selected) provides a better image
> quality but requires more time than the *speed* configuration.
> The last image with the *quality* value takes more time than the others
> but the final image has the best quality between the 4 images.
>
> From the results, in fact, it is easy to note that the image created with
> the *quality* hints has a better quality than that returned by the old
> WMSTileFuser class.
>
> I hope this could help to review the pull requests.
>
> P.S. The images are too big to be sent by mail, I add the following links
> for download:
>
> old wms request:
> https://drive.google.com/file/d/0B_H-B1p4qGi6VVgyVGJPYVV1c1hBMDMzakhPRTZlQTdzRFl3/edit?usp=sharing
> new wms request with speed hints:
> https://drive.google.com/file/d/0B_H-B1p4qGi6MEhJR1NxTkV2Tnh0Y3Zza2JJdHNtY0RhZVN3/edit?usp=sharing
> new wms request with default hints:
> https://drive.google.com/file/d/0B_H-B1p4qGi6bk5adnNYN2NjRUk/edit?usp=sharing
> new wms request with quality hints:
> https://drive.google.com/file/d/0B_H-B1p4qGi6b1RTYktBSjBtYlpOdGdFS3NVWkVIb1Rzd3g4/edit?usp=sharing
>
>
Hi Nicola,
I'm looking at the outputs, and finding something strange. The quality one
is definitely much better, for sure, however:
* the new images are ~20 times larger than the oldwms one (from 34kb to
758KB), something is wrong with the png compression parameters I suppose
* I cannot see any difference, visually, between oldwms, new with speed,
and new with default
Cheers
Andrea
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