Android emulator surface issue

[dm67x]

Hi,

I try to run wgpu program on Android using an emulator but it didn't work.

Btw, it's working on a real device.
Did I miss something or is it normal?

Thanks!

[teoxoy]

Could you share the whole log as text? It would also make it easier for others to find the issue.

[dm67x]

Of course, logs.txt

[teoxoy]

The error looks similar to #2101 & #2384.

Could you try to run it only with the GL backend enabled (change Backends::all() to Backends::GL)?

[jinleili]

Using wgpu::Backends::all() works fine on Android phones (OnePlus Ace Pro, Android 13) because device_type are all IntegratedGpu, and the picking order will pick the Vulkan backend:

AdapterInfo { name: "Adreno (TM) 730", vendor: 20803, device: 117637122, device_type: IntegratedGpu, driver: "Qualcomm Technologies Inc. Adreno Vulkan Driver", driver_info: "Driver Build: ee4b625, I41c6f366e1, 1676536850\nDate: 02/16/23\nCompiler Version: EV031.36.08.19\nDriver Branch: \n", backend: Vulkan }

AdapterInfo { name: "Adreno (TM) 730", vendor: 20803, device: 0, device_type: IntegratedGpu, driver: "", driver_info: "", backend: Gl }

However, in the emulator, the device_type for the Vulkan backend is Cpu, so it will only pick the GL backend:

AdapterInfo { name: "SwiftShader Device (LLVM 10.0.0)", vendor: 6880, device: 49374, device_type: Cpu, driver: "?", driver_info: "?", backend: Vulkan }

AdapterInfo { name: "Android Emulator OpenGL ES Translator (Apple M1 Max)", vendor: 4203, device: 0, device_type: IntegratedGpu, driver: "", driver_info: "", backend: Gl }

Using wgpu::Backends::GL works fine on Android phones, but it throws an error in the emulator:

eglMakeCurrent: 0x7ab3fc7780: ver 3 0 (tinfo 0x7b498defe0)
2023-08-12 15:09:48.677 10220-10220 wgpu::backend::direct   name.jinleili.wgpu.debug             E  Handling wgpu errors as fatal by default
2023-08-12 15:09:48.677 10220-10220 log_panics              name.jinleili.wgpu.debug             E  thread '<unnamed>' panicked at 'wgpu error: Validation Error
Caused by:
		In Device::create_render_pipeline
		Error matching ShaderStages(VERTEX) shader requirements against the pipeline 
		Shader uses 2 inter-stage components above the limit of 0

': /Users/lijinlei/Rust/forks/wgpu/wgpu/src/backend/direct.rs:3095

[dm67x]

@teoxoy yes it's working when I changed it to the OpenGL backend.

[teoxoy]

This is most likely a dupe of #2384.

Well that sucks. Both Instance and Surface in wgpu are for all of the active backends, simlultaneously. It looks like the Vulkan surface was created here, and it's blocking EGL surface.

from #2384 (comment)

[dm67x]

@teoxoy what should I do with this issue? Should I close it?

[teoxoy]

I think we can close it for now.

[teoxoy]

Using wgpu::Backends::GL works fine on Android phones, but it throws an error in the emulator:

eglMakeCurrent: 0x7ab3fc7780: ver 3 0 (tinfo 0x7b498defe0)
2023-08-12 15:09:48.677 10220-10220 wgpu::backend::direct   name.jinleili.wgpu.debug             E  Handling wgpu errors as fatal by default
2023-08-12 15:09:48.677 10220-10220 log_panics              name.jinleili.wgpu.debug             E  thread '<unnamed>' panicked at 'wgpu error: Validation Error
Caused by:
		In Device::create_render_pipeline
		Error matching ShaderStages(VERTEX) shader requirements against the pipeline 
		Shader uses 2 inter-stage components above the limit of 0

': /Users/lijinlei/Rust/forks/wgpu/wgpu/src/backend/direct.rs:3095

@jinleili the limit being 0 in the emulator doesn't sound right. Could you open a new issue for it?