Using Impeller as a rendering runtime

[swift-kim]

About Impeller: https://medium.com/flutter/announcing-flutter-3-3-at-flutter-vikings-6f213e068793#8c9a

The code: https://github.com/flutter/engine/tree/main/impeller

Wiki page: https://github.com/flutter/flutter/wiki/Impeller

I don't even currently know how it works, but I'm wondering if Impeller can be enabled for Tizen and how effective it will be on Tizen devices. Apparently the repository has GLES as one of its supported backends.

[swift-kim]

The Android embedder source code (android_surface_gl_impeller.cc and etc.) might help implementing a Tizen renderer that uses Impeller.

[swift-kim]

I temporarily disabled Impeller due to a build error: 0b43118508f2a495a7255c350e6dd2b7f6579172. Please re-enable it for testing.

[swift-kim]

The build error will be fixed by flutter/engine@c294429.

[swift-kim]

Currently blocked by flutter/flutter#112230.

[swift-kim]

Vulkan for Impeller has been disabled on engine build: flutter-tizen/engine@02e4b7b. Need to re-enable by applying these patches if you're going to work on it.

I couldn't find a way to override vulkan_use_x11 without modification to the buildroot. (I tried declaring vulkan_use_x11 using declare_args and passing as a GN argument but it didn't have any effect.)

[swift-kim]

Impeller build now requires glibc 2.30 (Tizen 6.0). glibc 2.24 (Tizen 5.5) is not compatible:

In file included from ../../flutter/impeller/core/shader_types.cc:5:
In file included from ../../flutter/impeller/core/shader_types.h:15:
../../flutter/impeller/geometry/half.h:19:22: error: _Float16 is not supported on this target
using InternalHalf = _Float16;
                     ^
1 error generated.

I'll add a temporary workaround to bypass the error.

[swift-kim]

The Impeller support for desktop platforms has landed to the embedder API:

• Windows (OpenGL): flutter/engine@e478f1b
• macOS (Metal): flutter/engine@052e226

I think we can now start evaluating Impeller on Tizen using the OpenGL backend. cc @haesik

[jonahwilliams]

We don't currently recommend shipping production applications with the OpenGL backend.

[xuelian-bai]

It's possible to enable vulkan backend on Tizen, we need time to investigate about impeller