Fortraneries/GrafAnim/noisepic.f90

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Fortran
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program noisepic
use spitpgm
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use pixrgb
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implicit none
integer :: numframe = 0
integer :: nbarg
character(len=256) :: arg
nbarg = IARGC()
if (nbarg .GT. 0) then
call GETARG(1, arg)
! write (0, '(A40, A5)') "argument = ", arg
read (arg, *) numframe
endif
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call make_noise_color_pic(numframe)
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contains
!-- ------------------------------------------------------------------
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!-
!- Black & White
!-
subroutine make_noise_bw_pic (value)
implicit none
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integer, intent(in) :: value
integer :: foo
integer, dimension(:,:), allocatable :: pic
character (len=280) :: filename
allocate(pic(320, 240))
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pic = 30 !- clear the picz
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call srand(value+34)
foo = irand()
print *, 'val=', value, ' rnd=', foo
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call plot_noise_bw_pic(pic, 15000)
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write (filename, "(a, i5.5, a)") "", value, ".pgm"
call spit_as_pgm_8(pic, trim(filename))
end subroutine
!-- ------------------------------------------------------------------
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subroutine plot_noise_bw_pic(picz, nbre)
implicit none
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integer, dimension(:,:), intent(inout) :: picz
integer, intent(in) :: nbre
integer :: width, height
integer :: quux, ix, iy, iv
width = ubound(picz, 1) ; height = ubound(picz, 2)
! print *, 'sz picz', width, height
do quux=1, nbre
ix = 1 + mod ( irand(), width )
iy = 1 + mod ( irand(), height )
iv = mod ( irand(), 256 )
! print *, ix, iy
picz(ix, iy) = iv
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enddo
end subroutine
!-- ------------------------------------------------------------------
!-
!- Colorized
!-
subroutine make_noise_color_pic (value)
implicit none
integer, intent(in) :: value
integer :: foo
type(t_pixrgb), dimension(:,:), allocatable :: pix
character (len=280) :: filename
allocate(pix(320, 240))
call rgbpix_set_to_rgb(pix, 30, 30, 60)
call srand(value+34)
foo = irand()
print *, 'val=', value, ' rnd=', foo
call plot_noise_color_pic(pix, 15000)
write (filename, "(a, i5.5, a)") "./", value, ".pnm"
call rgbpix_spit_as_pnm_8(pix, trim(filename))
end subroutine
!-- ------------------------------------------------------------------
subroutine plot_noise_color_pic(prgb, nbre)
implicit none
type(t_pixrgb), dimension(:,:), intent(inout) :: prgb
integer, intent(in) :: nbre
integer :: quux, ix, iy, width, height
width = ubound(prgb, 1) ; height = ubound(prgb, 2)
do quux=1, nbre
ix = 1 + mod ( irand(), width )
iy = 1 + mod ( irand(), height )
prgb(ix, iy)%r = 64 + mod ( irand(), 127 )
prgb(ix, iy)%g = 64 + mod ( irand(), 127 )
prgb(ix, iy)%b = 64 + mod ( irand(), 127 )
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enddo
end subroutine
!-- ------------------------------------------------------------------
end program