godot-lib Feature requests

[GeorgeS2019]

28thMarch2023 Update

LibGodot with GDExtension

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Since it will be a while before godot-lib would be merged, this issue is to feedback and track feature requests related to godot-lib.

• Collect a list of ToDo or Yet-To-Implement features exposed through the Godot-Lib for c#
• Making Advanced GUI Applications with Godot

[Airyzz]

As I mentioned on the godot pull request, it would be great to be able to pass a custom opengl context to render to, or provide some other way of rendering to a texture, such that the godot display can be embedded inside other applications.

I think this would also benefit from a way to inject mouse/keyboard/touch inputs via code, so that for example, if I am creating a widget in flutter which displays the rendered texture, if I touch a point on that widget I can transfer that input back to godot.

[Faolan-Rad]

You can inject mouse/keyboard/touch input into a view port for example this is done in rhubarb Ref

Now for render context I do want to do that because I plan to integrate lib VLC into rhubarb

[GeorgeS2019]

@Faolan-Rad

Iphone version
https://github.com/migueldeicaza/SwiftGodot

232163186-dc7c0290-71db-49f2-b812-c775c55b8b77.1.mov

[mikejohnstn]

I'm also very interested in using libgodot with an offscreen rendering context. After spending some time researching the state of things, I thought I'd share what I found in case it helps (or in case I got some things wrong).

• libgodot itself is slated for a 4.x Godot release, but the PR seems stalled I think?
• libgodot is already being used for RhubarbVR
• it's also now powering SwiftGodot
• people seem to be able to follow these examples for their own purposes (including me, got it working with Rust)
• there's a proposal by Carinou for offscreen rendering in Godot but it doesn't seem to have much traction: Implement support for off-screen rendering godotengine/godot-proposals#5790
• Carinou links to a Vulkan sample that achieves offscreen rendering: https://github.com/SaschaWillems/Vulkan/blob/master/examples/renderheadless/renderheadless.cpp
• there's a related proposal by reduz for embedding a game view inside the editor, where he mentions using Vulkan extensions to do this: Add support for embedding the game window in the editor godotengine/godot-proposals#7213
• I assume the community will focus on the embedded editor use case first, but maybe that work could help libgodot as well?

In the meantime, I found one example of someone using a workaround for offscreen rendering where they continuously render the viewport to a JPG buffer and send it elsewhere manually, but this still seems to require a window rendering in the background.

If anyone has any other updates / corrections / suggestions to move this forward, I'd love to hear!

[GeorgeS2019]

@mikejohnstn

We need to give @Faolan-Rad more Love