!-
!	This module try to write PGM complient gray level files
!-
module pixrgb
    implicit none
!-----------------------------------------------------------------------
!-
!      definition of structures
!-
type t_pixrgb
  integer           :: r, g, b
  integer           :: alpha = 0
end type
!-------------------------------------------------------------------
contains
!-------------------------------------------------------------------
!-
subroutine rgbpix_spit_as_pnm_8(pic, fname)

  type(t_pixrgb), intent(in)       ::  pic(:,:)
  character (len=*), intent(in)    ::  fname

  integer                               ::  io, ix, iy

  open(newunit=io, file=fname)
  write (io, '(a2)') "P3"
  write (io, '("# rgbpix_spit_as_pnm_8")')
  write (io, '(i0," ",i0)')  size(pic, 1), size(pic, 2)
  write (io, '(i0)') 255

  do iy=1, ubound(pic, 2)
    do ix=1, ubound(pic, 1)

    write(io, "(3I4)") pic(ix, iy)%r, pic(ix, iy)%g, pic(ix, iy)%b

    enddo
  enddo
  close(unit=io)

end subroutine
!-------------------------------------------------------------------
!-
subroutine rgbpix_spit_as_pnm_16(pic, fname)

  type(t_pixrgb), intent(in)       ::  pic(:,:)
  character (len=*), intent(in)    ::  fname

  integer                               ::  io, ix, iy

  open(newunit=io, file=fname)
  write (io, '(a2)') "P3"
  write (io, '("# rgbpix_spit_as_pnm_16")')
  write (io, '(i0," ",i0)')  size(pic, 1), size(pic, 2)
  write (io, '(i0)') 65535

  do iy=1, ubound(pic, 2)
    do ix=1, ubound(pic, 1)

    write(io, "(3I6)") pic(ix, iy)%r, pic(ix, iy)%g, pic(ix, iy)%b

    enddo
  enddo
  close(unit=io)

end subroutine
!-------------------------------------------------------------------
end module