message: Fix PostVS alignment calculation in test mesh fetch
diff: @@ -124,16 +124,24 @@ def get_postvs_attrs(controller: rd.ReplayController, mesh: rd.MeshFormat, data_
  accum_offset = 0
  for i in range(0, len(attrs)):
  - attrs[i].mesh.vertexByteOffset = accum_offset
  -
  # Note that some APIs such as Vulkan will pad the size of the attribute here
  # while others will tightly pack
  fmt = attrs[i].mesh.format
  - accum_offset += (8 if fmt.compType == rd.CompType.Double else 4) * fmt.compCount
  + elem_size = (8 if fmt.compType == rd.CompType.Double else 4)
  +
  + alignment = elem_size
  + if fmt.compCount == 2:
  + alignment = elem_size * 2
  + elif fmt.compCount > 2:
  + alignment = elem_size * 4
  +
  + if pipe.HasAlignedPostVSData(data_stage) and (accum_offset % alignment) != 0:
  + accum_offset += alignment - (accum_offset % alignment)
  +
  + attrs[i].mesh.vertexByteOffset = accum_offset
  - if pipe.HasAlignedPostVSData(data_stage) and (accum_offset % 16) != 0:
  - accum_offset += 16 - (accum_offset % 16)
  + accum_offset += elem_size * fmt.compCount
  return attrs
  