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add makeUint8List helper method for ffi/jsinterop

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This commit is contained in:
Nick Fisher
2025-06-17 18:01:18 +08:00
parent a29b194612
commit 558978a0f2
2 changed files with 17 additions and 2 deletions
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4
thermion_dart/lib/src/bindings/src/ffi.dart
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@@ -11,6 +11,10 @@ const FILAMENT_SINGLE_THREADED = false;
const FILAMENT_WASM = false; const FILAMENT_WASM = false;
bool get IS_WINDOWS => Platform.isWindows; bool get IS_WINDOWS => Platform.isWindows;
Uint8List makeUint8List(int length) {
return Uint8List(length);
}
Int32List makeInt32List(int length) { Int32List makeInt32List(int length) {
return Int32List(length); return Int32List(length);
} }

15
thermion_dart/lib/src/bindings/src/js_interop.dart
View File

@@ -12,6 +12,14 @@ const IS_WINDOWS = false;
final _allocations = <TypedData>{}; final _allocations = <TypedData>{};
Uint8List makeUint8List(int length) {
var ptr = malloc<Uint8>(length);
var buf = _NativeLibrary.instance._emscripten_make_uint8_buffer(ptr, length);
var uint8List = buf.toDart;
_allocations.add(uint8List);
return uint8List;
}
Int32List makeInt32List(int length) { Int32List makeInt32List(int length) {
var ptr = stackAlloc<Int32>(length * 4); var ptr = stackAlloc<Int32>(length * 4);
var buf = _NativeLibrary.instance._emscripten_make_int32_buffer(ptr, length); var buf = _NativeLibrary.instance._emscripten_make_int32_buffer(ptr, length);
@@ -132,6 +140,10 @@ extension Uint8ListExtension on Uint8List {
if (this.lengthInBytes == 0) { if (this.lengthInBytes == 0) {
return nullptr; return nullptr;
} }
if (_allocations.contains(this)) {
return Pointer<Uint8>(
_NativeLibrary.instance._emscripten_get_byte_offset(this.toJS));
}
final ptr = getPointer<Uint8>(this, this.toJS); final ptr = getPointer<Uint8>(this, this.toJS);
final bar = final bar =
Uint8ArrayWrapper(NativeLibrary.instance.HEAPU8.buffer, ptr, length) Uint8ArrayWrapper(NativeLibrary.instance.HEAPU8.buffer, ptr, length)
@@ -139,14 +151,13 @@ extension Uint8ListExtension on Uint8List {
var now = DateTime.now(); var now = DateTime.now();
bar.toDart.setRange(0, length, this); bar.toDart.setRange(0, length, this);
var finished = DateTime.now(); var finished = DateTime.now();
print(
"uint8list copy finished in ${finished.millisecondsSinceEpoch - now.millisecondsSinceEpoch}ms");
return ptr; return ptr;
} }
} }
extension Float32ListExtension on Float32List { extension Float32ListExtension on Float32List {
Pointer<Float32> get address { Pointer<Float32> get address {
final ptr = getPointer<Float32>(this, this.toJS); final ptr = getPointer<Float32>(this, this.toJS);
final bar = final bar =
Float32ArrayWrapper(NativeLibrary.instance.HEAPU8.buffer, ptr, length) Float32ArrayWrapper(NativeLibrary.instance.HEAPU8.buffer, ptr, length)