Class Icons only

hooksecurefunc("UnitFramePortrait_Update",function(self)
    if self.portrait then
        if UnitIsPlayer(self.unit then
            local t = CLASS_ICON_TCOORDS[select(2,UnitClass(self.unit]
            if t then
                self.portrait:SetTexture("Interface\\TargetingFrame\\UI-Classes-Circles")
                self.portrait:SetTexCoord(unpack(t))
            end
        else
            self.portrait:SetTexCoord(0,1,0,1)
        end
    end
end);