Use LocalPreferences.toml to use system level libEGL by default for linux systems

[arhik]

No description provided.

[arhik]

@VarLad came up with this option. Now we have to figure out how to ship this solution that works on all Linux-systems.

[arhik]

Preferences.jl looks interesting.

[arhik]

Used Libdl and Prefererences.jl library to make this work. Reference to commit in WGPUCanvas library here.

JuliaWGPU/WGPUCanvas.jl@e8c859d

[arhik]

Fixed here

[arhik]

slack discussion is going on this approach.

[arhik]

WGPUCanvas.jl is registered with this fix JuliaRegistries/General#95352

[arhik]

We can close this once anyone confirms that this is indeed fixed.

[VarLad]

@arhik Apologies, I'm running into the same issue again (it crashes with GLFW loaded)
I believe that the examples need to be updated to use WGPUCanvas.jl instead of directly GLFW.jl?

[VarLad]

I was able to get the cube example running (using the hack I wrote).
I'm guessing that the examples have to be updated to use WGPUCanvas.jl instead of GLFW.jl?
@arhik Correct me if I'm wrong of this

[arhik]

May be you are not placing LocalPreferences.toml file in global folder. I am placing it in the julia dev folder (like ~/.julia/environment). Yes. On linux I had to manually create LocalPreferences.toml file like you suggested and it works but I wish it can be automated. I will have to dig into it. Anyways check your configuration and let me know.

[arhik]

By the way all examples in the GUI must be flipped vertically if you are using the master branch; I made few changes while working on gaussian splatting code.

[VarLad]

@arhik The LocalPreferences.jl file worked but I'm asking if instead of directly using GLFW.jl, does it make more sense to use WGPUCanvas instead?
Seems like its function is to reduce boilerplate of working with WGPU + GLFW :P

[arhik]

Yes totally. A little more abstraction with WGPUCanvas will help. If we don't have to use these in examples like these

using GLFW
using GLFW: WindowShouldClose, PollEvents, DestroyWindow

with abstracted functions defined in WGPUCanvas would be great.

[arhik]

I am not happy with too much clutter of duplicate includes too. I see your point.

[VarLad]

@arhik Is there any examples of WGPUCanvas.jl in action?

[arhik]

I am not following. Can you rephrase or expand on it?

[arhik]

All examples use WGPUCanvas. WGPUgfx loads WGPUCanvas. And its WGPUCanvas's job to load appropriate surface based on platform.

[arhik]

If I misunderstood your question correct me please.

[arhik]

It doesn't look like it but in WGPUCanvas we provide getCanvas through WGPUCore definitions.

WGPUgfx.jl/src/scene.jl

Line 22 in f95dfd5

canvas = WGPUCore.getCanvas(:GLFW)

[arhik]

Platform dependent canvas will be loaded here.

https://github.com/JuliaWGPU/WGPUCanvas.jl/blob/02d0b98a0cef3cefd755d9fa4a30bb3e258ee06b/src/WGPUCanvas.jl#L35

[VarLad]

@arhik Ah, sorry, I thought WGPUCanvas acted as a replacement for directly using GLFW 😅
Didn't see that it was imported and used by WGPUgfx

By the way, were you able to figure out why the libglvnd provided by BinaryBuilder gives issues here?

[arhik]

No. But its a prevalent Symbol collision issue.

[VarLad]

@arhik I'm interested in helping to get the circle example working.
I guess I need to work on the circle primitive first. I believe that would be a good starting point for contribution as well.

Can you give me some directions towards this?

[arhik]

UI circle example should help. Divide circle into triangle primitive. Within triangle primitive, you only need two sides as a template unit (i.e three vertices). You will have rotate these three vertices with 360/n degrees ( n - no of divisions) n times. All these already part of ui/circle.jl.

https://github.com/JuliaWGPU/WGPUgfx.jl/blob/main/src/ui/circle.jl

[arhik]

Basically you should return a Circle object with indexData, vertexData, colorData and normalData (optional)

[VarLad]

@arhik Is there any example that deals with 2D shapes?

[arhik]

tri.jl and plane.jl is simplest.

https://github.com/JuliaWGPU/WGPUgfx.jl/blob/main/examples/plane.jl

These are actually 2D objects in 3D world. If you are asking for strictly 2D object restricted to image plane then look into ui/quad.jl. Its mostly copy paste of plane.jl except z-values are forced to zero and camera is not included in the generated in wgsl code.

[VarLad]

@arhik Thanks, that was really helpful.
Do you have an example which shows working with mouse or keypresses?

[arhik]

splat.jl should be listening to both mouse events and keypresses. No visual aid for key pressess. That would interesting project.

For splat.jl to work you will have to download a file from here https://drive.google.com/drive/folders/1B8fBd3ivh1OuJBY_P28woJfmzvWc8WlO

[VarLad]

@arhik I looked at the specific example (splat.jl) but I can't seem to find the specific lines that seem to be listening to keypresses or mouse movements.
Is there a way to print them to screen?

[arhik]

key - 'a' for attaching event system and 'd' for detaching event system. You should see mouse pointer output and key events in the terminal window.

[arhik]

Look into events.jl files in both WGPUCanvas and WGPUgfx. Basically WGPUCanvas provides hooks which WGPUgfx will hook into and overwrite event output. In detached mode you will have all events printed out in terminal. WGPUgfx override events with no print statements.