Declaration

const
  _exoUnknown                     = 0;   // Image does not have orientation data
  _exoCorrectOrientation          = 1;   // Image is orientated correctly
  _exoNeedsHorizontalFlip         = 2;   // Image is horizontally flipped
  _exoNeeds180Rotate              = 3;   // Image is offset by 180 deg.
  _exoNeedsVerticalFlip           = 4;   // Image is vertically flipped
  _exoNeedsHorzFlipAnd90RotateCW  = 5;   // Image is horizontally flipped and offset 90 deg. CCW
  _exoNeeds90RotateCW             = 6;   // Image is offset by 90 deg. counter-clockwise
  _exoNeedsHorzFlipAnd270RotateCW = 7;   // Image is horizontally flipped and offset 90 deg. CW
  _exoNeeds270RotateCW            = 8;   // Image is offset by 90 deg. clockwise

Description

Possible values for EXIF_Orientation:

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