[Interest] Qt Location custom osm plugin and high res tiles

[maitai]

Hi Paolo,

My initial question was concerning a custom map type, not a derived 
plugin. So basically you are saying that on a retina x2 screen I can 
send back 512x512 tiles and the plugin will mark the tile with 
pixelRatio = 2 (i.e not just rescale it) ?

But in fact I would prefer to be able to create my own plugin, because 
the charts I am using are just local (some of them drawn on the fly, 
some of them stored in mbtiles, some of them encrypted, and potentially 
I also need vector tiles). For the time being I create a thread for each 
type of map which is also a QTcpServer, but I would prefer to be able to 
communicate directly and control more things at the plugin level. I will 
investigate all this once more.

Thanks again for you replies
Philippe.

Le 20-02-2019 09:59, Paolo Angelelli a écrit :
> I may have misunderstood what you meant with "custom osm plugin".
> What does that mean?
> If you meant "a modified osm plugin", then you would be already using
> this class anyway.
> If you meant "custom map type", then just feeding 512x512 tiles should 
> work.
> 
> On Wed, 20 Feb 2019 08:38:44 +0100
> maitai <maitai at virtual-winds.org> wrote:
> 
>> Hi,
>> 
>> Seems to me that QGeoCameraCapabilities is a private qt API?
>> 
>> From what I found on the net seems it would help a lot for customizing
>> own map plugin or tile server, but it's not clear how I can access it.
>> 
>> Philippe
>> 
>> Le 19-02-2019 19:40, maitai a écrit :
>> 
>> > Thanks I'll give it a try
>> >
>> > -------- Message d'origine --------
>> > De : Paolo Angelelli <paolo.angelelli at qt.io>
>> > Date : 19/02/2019 7:21 PM (GMT+01:00)
>> > À : interest at qt-project.org
>> > Objet : Re: [Interest] Qt Location custom osm plugin and high res tiles
>> >
>> > Hi, yes it's easy.
>> > All you have to do is setting the appropriate QGeoCameraCapabilities for the map types you have high dpi tiles for.
>> > So in your case, set the tilesize to 256x256, so that you will have more data per logical pixel.
>> >
>> > hope it's clear enough. Or just check how it's done in either osm or here or mapbox plugins
>> >
>> > On Tue, 19 Feb 2019 09:51:30 +0100
>> > maitai <maitai at virtual-winds.org> wrote:
>> >
>> >> Hello,
>> >>
>> >> Is it possible to use high res tiles with a custom osm plugin?
>> >> In fact I created my own local server and would like to know if I can
>> >> send high res tiles, for instance if devicePixelRatio is 2 I would send
>> >> 512x512 tiles, expecting Qt Location to set the tile pixel ratio to 2.
>> >>
>> >> Thanks
>> >> Philippe.
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