static void GetFilterOffsetAndLength(UniquePtr<skia::ConvolutionFilter1D>& aFilter, int32_t aOutputImagePosition, int32_t* aFilterOffsetOut, int32_t* aFilterLengthOut) { MOZ_ASSERT(aOutputImagePosition < aFilter->num_values()); aFilter->FilterForValue(aOutputImagePosition, aFilterOffsetOut, aFilterLengthOut); }