[ASDAlexander77]

Summary

• android-arm32 preset, tools/android.py --abi arm32, and armeabi-v7a in package_apk.py; CMakeLists.txt uses the armv7a-linux-androideabi triple and defines VULKAN_HPP_TYPESAFE_CONVERSION for it (Vulkan's non-dispatchable handles are 64-bit integers on 32-bit targets).
• patches/nvrhi-vulkan-32bit-handles.patch: NVRHI's Vulkan backend names objects and builds debug text through a rawHandle() helper, and uses VK_NULL_HANDLE instead of nullptr.
• patches/Donut-chunk-layout-64bit-only.patch: Donut's chunk struct size asserts hold only on 64-bit.
• patches/Donut-skinned-buffer-size-uint64.patch: size_t passed as uint64_t& in Scene::CreateMeshBuffers.
• core/donut_interop.cpp: Vulkan handles to and from NVRHI's Object (pointer on 64-bit, integer on 32-bit) and printfMessenger kept as its 64 bits.
• headless and nvrhi_direct are not built for armeabi-v7a: tslang has no @cppvtable struct returns for 32-bit ARM, so core/nvrhi.ts cannot compile there. android.py skips headless for arm32.

Needs

A tslang drop with the armeabi-v7a collector, async runtime and default library (android/armeabi-v7a/lib, defaultlib/lib/arm): see ASDAlexander77/TypeScriptCompiler#555 and ASDAlexander77/TypeScriptCompilerDefaultLib#32.

Verified

• python tools/android.py build --abi arm32 basic_triangle builds the APK (NDK r30).
• On a Galaxy Tab A 10.1 (SM-T510, armeabi-v7a only, Android 11) the APK installs and starts: the tslang runtime loads, Vulkan creates its instance, then Donut stops with "Vulkan API version supported on the system (1.1.0) is too low, at least 1.3.0 is required".

Not verified

• No frame has been rendered on 32-bit ARM: the only device available has Vulkan 1.1. Needs a 32-bit-capable device with Vulkan 1.3.
• Only basic_triangle was built; the other examples were not.
• Debug builds and the existing x86_64 and arm64 presets were not rebuilt after these changes (the 64-bit paths of the rawHandle/vkHandle* helpers compile to the old pointer casts, but that is unchecked).

🤖 Generated with Claude Code

[ASDAlexander77]

Update: after these changes basic_triangle_apk also builds for android-x86_64 and android-arm64 (the 64-bit paths of the handle helpers). Not run on a device or emulator.