Fortraneries/Modules/pixrgb.f90

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!-
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! This module try to write PNM complient RGB files
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!-
module pixrgb
implicit none
!-----------------------------------------------------------------------
!-
! definition of structures
!-
type t_pixrgb
integer :: r, g, b
integer :: alpha = 0
end type
!-------------------------------------------------------------------
contains
!-------------------------------------------------------------------
!-
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subroutine rgbpix_set_to_zero(pic)
type(t_pixrgb), intent(out) :: pic(:,:)
integer :: ix, iy
do iy=1, ubound(pic, 2)
do ix=1, ubound(pic, 1)
pic(ix, iy)%r = 0
pic(ix, iy)%g = 0
pic(ix, iy)%b = 0
enddo
enddo
end subroutine
!-------------------------------------------------------------------
!-
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! NOT TESTED !!!
!-
subroutine rgb_pix_clamp_at_8(pic)
type(t_pixrgb), intent(inout) :: pic(:,:)
integer :: ix, iy
do iy=1, ubound(pic, 2)
do ix=1, ubound(pic, 1)
pic(ix, iy)%r = max(0, min(pic(ix, iy)%r, 255))
pic(ix, iy)%g = max(0, min(pic(ix, iy)%g, 255))
pic(ix, iy)%b = max(0, min(pic(ix, iy)%b, 255))
enddo
enddo
end subroutine
!-------------------------------------------------------------------
!-
! CAUTION: there was NO out-of-bounds check !
!-
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subroutine rgbpix_spit_as_pnm_8(pic, fname)
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type(t_pixrgb), intent(in) :: pic(:,:)
character (len=*), intent(in) :: fname
integer :: io, ix, iy
open(newunit=io, file=fname)
write (io, '(a2)') "P3"
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write (io, '("# rgbpix_spit_as_pnm_8")')
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write (io, '(i0," ",i0)') size(pic, 1), size(pic, 2)
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write (io, '(i0)') 255
do iy=1, ubound(pic, 2)
do ix=1, ubound(pic, 1)
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write(io, "(3I5)") pic(ix, iy)%r, pic(ix, iy)%g, pic(ix, iy)%b
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enddo
enddo
close(unit=io)
end subroutine
!-------------------------------------------------------------------
!-
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! CAUTION: there was NO out-of-bounds check !
!-
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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)
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write(io, "(3I6)") pic(ix, iy)%r, pic(ix, iy)%g, pic(ix, iy)%b
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enddo
enddo
close(unit=io)
end subroutine
!-------------------------------------------------------------------
end module