Is there a map library working with Compose Desktop I am thi

Question

Is there a map library working with Compose Desktop I am thinking something like GoogleMaps Mapbox or MapLibre I saw people online mentioning MapLibre or was it Mapbox and issues related to the fact that it uses OpenGL With Android it uses a GLSurfaceView doesn t that exist with Compose Desktop I was looking at <https maplibre org maplibre native docs book design ten thousand foot view html> but I am having a hard time evaluating if this would be a feasible side project or if that s a 6 months task for an experienced Compose Maplibre developer grin Any pointers are welcome

Big Chungus · Answer

<http link petuska dev mapk|link petuska dev mapk> wink

jonesv · Answer

I had realized that the channel is not very active but if I had known that I would be spammed on my first message I wouldn t have bothered

Big Chungus · Answer

Don t take it so personally

Big Chungus · Answer

As for your initial question you might have better luck in finding an answer if you clarify what s the actual ask here Are you evaluating the complexity of writing kn bindings for maplibre or are you thinking of mapping maplibre and something else to build a kmp library with common api surface Something else entirely

jonesv · Answer

MapLibre forked from Mapbox has a C++ engine for rendering maps They have Android bindings not to Compose just to Java

Big Chungus · Answer

For CfD you could try JxBrowser via compose swing interop <https dzone com articles google maps java swing|https dzone com articles google maps java swing>

jonesv · Answer

Since the engine currently renders to OpenGL the Android layer somehow ends up creating a GLSurfaceView and passing it to the C++ core I am not yet completely clear on the implementation details

jonesv · Answer

I see a GLSurfaceView on Android as a box to which Android will forward events that may or may not be consumed by the surface and on top of which Android may or may not draw stuff Android doesn t know about the actual texture rendered in this Surface that s just a box with some texture

jonesv · Answer

That s fine for Android but now I wonder how do I do that with Compose Desktop Is there a notion of a surface to which something renders and that may consume touch events or mouse events for Dekstop

Big Chungus · Answer

There must be as it uses the same skia engine

jonesv · Answer

You mean Compose Desktop uses the same skia engine as Android Compose

Big Chungus · Answer

Is this what you re after <https stackoverflow com a 67038959|https stackoverflow com a 67038959>

jonesv · Answer

sorry if I m being vague I m trying to get keywords at this stage smile

jonesv · Answer

Is the concept of native canvas you linked above related to OpenGL skia It seems pretty high level but I can look how low level its interface goes

Big Chungus · Answer

Not sure tbh

jonesv · Answer

I guess I am looking for the equivalent of GLSurfaceView on Compose Desktop but maybe I should now have a closer look at how this GLSurfaceView ends up being used

jonesv · Answer

Thanks for the help

Big Chungus · Answer

tenor gif2066954490307115694 gif

jonesv · Answer

Hmm Canvas seem higher level than OpenGL Seems to me that it is not possible to integrate MapLibre Mapbox with Compose Desktop Maybe someday

Landry Norris · Answer

You can embed Swing components in CfD so if there s a good Swing library I d use that

jonesv · Answer

Let me be more specific I actually don t need to write a Compose for Desktop app that shows a map I want to understand what it would involve to integrate a map engine like Mapbox MapLibre with Compose for Desktop MapLibre Mapbox render with OpenGL so at some point I need some kind of construct in Compose for Desktop that can interface with that

jonesv · Answer

Seems like the lowest level I can get with Compose is Canvas which is an abstraction above the renderer

jonesv · Answer

So yeah seems like it s not possible

Landry Norris · Answer

I used ffmpeg to build a video player in Compose for Andriod and iOS at my last job It s definitely possible I would recommend taking a look at some low level drawing APIs

Landry Norris · Answer

For example in CfD you can access nativeCanvas you can access nativeCanvas in any platform but it s different If you can get an array of ARGB values you can use that for rendering

jonesv · Answer

Is there some documentation code I could read about that I read the API definition of nativeCanvas but still a bit unclear to me how to render an ARGB array

jonesv · Answer

A video player would be a cool exercise actually slightly smiling face

Timo Drick · Answer

Here i presented a prototype for video player which uses an ARGB array to show video <https kotlinlang slack com archives C01D6HTPATV p1687168672359469>

Timo Drick · Answer

When you go to the thread i also pointed out the code lines which does the image copying

Timo Drick · Answer

In general i think that CfD lacks possibilities to integrate it with other libraries you need to get many multimedia things done I know CfD is not an multimedia framework But who wants to build apps that are not able to playback video or show a map