// Convert dart_xform._value[0...3] ==> RSTransform
RSTransform DartConverter<RSTransform>::FromDart(Dart_Handle dart_xform) {
RSTransform result;
result.is_null = true;
if (Dart_IsNull(dart_xform))
return result;
Dart_Handle value =
Dart_GetField(dart_xform, DOMDartState::Current()->value_handle());
if (Dart_IsNull(value))
return result;
Dart_TypedData_Type type;
float* data = nullptr;
intptr_t num_elements = 0;
Dart_TypedDataAcquireData(
value, &type, reinterpret_cast<void**>(&data), &num_elements);
DCHECK(!LogIfError(value));
ASSERT(type == Dart_TypedData_kFloat32 && num_elements == 4);
SkScalar* dest[] = {
&result.sk_xform.fSCos,
&result.sk_xform.fSSin,
&result.sk_xform.fTx,
&result.sk_xform.fTy
};
for (intptr_t i = 0; i < 4; ++i)
*dest[i] = data[i];
Dart_TypedDataReleaseData(value);
result.is_null = false;
return result;
}
// Construct an SkRRect from a Dart RRect object.
// The Dart RRect has a _value field which is a Float32List containing
// [left, top, right, bottom, xRad, yRad]
RRect DartConverter<RRect>::FromDart(Dart_Handle dart_rrect) {
RRect result;
result.is_null = true;
if (Dart_IsNull(dart_rrect))
return result;
Dart_Handle value =
Dart_GetField(dart_rrect, UIDartState::Current()->value_handle());
if (Dart_IsNull(value))
return result;
Dart_TypedData_Type type;
float* data = nullptr;
intptr_t num_elements = 0;
Dart_TypedDataAcquireData(
value, &type, reinterpret_cast<void**>(&data), &num_elements);
DCHECK(!LogIfError(value));
ASSERT(type == Dart_TypedData_kFloat32 && num_elements == 6);
result.sk_rrect.setRectXY(
SkRect::MakeLTRB(data[0], data[1], data[2], data[3]),
data[4], data[5]);
Dart_TypedDataReleaseData(value);
result.is_null = false;
return result;
}
