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use face::Face;
use ffi;

#[derive(Copy, Clone)]
pub struct TrueTypeOS2Table {
    raw: ffi::TT_OS2_Internal
}

impl TrueTypeOS2Table {
    pub fn from_face(face: &mut Face) -> Option<Self> {
        unsafe {
            let os2 = ffi::FT_Get_Sfnt_Table(face.raw_mut() as *mut ffi::FT_FaceRec, ffi::ft_sfnt_os2) as ffi::TT_OS2_Internal;
            if !os2.is_null() && (*os2).version != 0xffff {
                Some(TrueTypeOS2Table { raw: os2 })
            } else {
                None
            }
        }
    }

    #[inline(always)]
    pub fn version(self) -> ffi::FT_UShort {
        unsafe { (*self.raw).version }
    }

    #[inline(always)]
    pub fn avg_char_width(self) -> ffi::FT_Short {
        unsafe { (*self.raw).xAvgCharWidth }
    }

    #[inline(always)]
    pub fn us_weight_class(self) -> ffi::FT_UShort {
        unsafe { (*self.raw).usWeightClass }
    }

    #[inline(always)]
    pub fn us_width_class(self) -> ffi::FT_UShort {
        unsafe { (*self.raw).usWidthClass }
    }

    #[inline(always)]
    pub fn fs_type(self) -> ffi::FT_Short {
        unsafe { (*self.raw).fsType }
    }

    #[inline(always)]
    pub fn y_subscript_x_size(self) -> ffi::FT_Short {
        unsafe { (*self.raw).ySubscriptXSize }
    }

    #[inline(always)]
    pub fn y_subscript_y_size(self) -> ffi::FT_Short {
        unsafe { (*self.raw).ySubscriptYSize }
    }

    #[inline(always)]
    pub fn y_subscript_x_offset(self) -> ffi::FT_Short {
        unsafe { (*self.raw).ySubscriptXOffset }
    }

    #[inline(always)]
    pub fn y_subscript_y_offset(self) -> ffi::FT_Short {
        unsafe { (*self.raw).ySubscriptYOffset }
    }

    #[inline(always)]
    pub fn y_superscript_x_size(self) -> ffi::FT_Short {
        unsafe { (*self.raw).ySuperscriptXSize }
    }

    #[inline(always)]
    pub fn y_superscript_y_size(self) -> ffi::FT_Short {
        unsafe { (*self.raw).ySuperscriptYSize }
    }

    #[inline(always)]
    pub fn y_superscript_x_offset(self) -> ffi::FT_Short {
        unsafe { (*self.raw).ySuperscriptXOffset }
    }

    #[inline(always)]
    pub fn y_superscript_y_offset(self) -> ffi::FT_Short {
        unsafe { (*self.raw).ySuperscriptYOffset }
    }

    #[inline(always)]
    pub fn y_strikeout_size(self) -> ffi::FT_Short {
        unsafe { (*self.raw).yStrikeoutSize }
    }

    #[inline(always)]
    pub fn y_strikeout_position(self) -> ffi::FT_Short {
        unsafe { (*self.raw).yStrikeoutPosition }
    }

    #[inline(always)]
    pub fn s_family_class(self) -> ffi::FT_Short {
        unsafe { (*self.raw).sFamilyClass }
    }

    #[inline(always)]
    pub fn x_height(self) -> ffi::FT_Short {
        unsafe { (*self.raw).sxHeight }
    }
}