message: Pass SIMD vectors by reference
diff: @@ -1131,8 +1131,8 @@ inline void blend(
  int height,
  InputColor const& color,
  OutputColor* buffer,
  - T sfactor,
  - T dfactor
  + T const& sfactor,
  + T const& dfactor
  )
  {
  InputColor dst;
  @@ -1160,8 +1160,8 @@ inline void blend(
  int height,
  result_record<S> const& rr,
  OutputColor* color_buffer,
  - T sfactor,
  - T dfactor
  + T const& sfactor,
  + T const& dfactor
  )
  {
  blend(
  @@ -1205,8 +1205,8 @@ inline void blend(
  result_record<S> const& rr,
  OutputColor* color_buffer,
  Depth* depth_buffer,
  - T sfactor,
  - T dfactor
  + T const& sfactor,
  + T const& dfactor
  )
  {
  // Blend color
  