work on modules, expect bugs

Modules/Makefile

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+#
+#		* Fortraneries *
+#
+#	Makefile for the general purpose moduls
+#
+
+GFOPT  = -Wall -Wextra -time -g -O 
+
+spitpgm.o:		spitpgm.f90 Makefile
+	gfortran $(GFOPT) -c $< -o $@

Modules/README.md

@@ -1,3 +1,4 @@
-# General pupose modules
+# General purpose modules
 
 
+* spitpgm

Modules/spitpgm.f90

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+!-
+!	This module try to write PNM complient files - ymmv
+!
+module spitpgm
+
+    implicit none
+    contains
+
+!-------------------------------------------------------------------
+!-
+!   This subroutine try to scale the values to fit the 16 bit range
+!
+subroutine spit_as_pgm_eq(pic, fname)
+
+    integer, intent(in), dimension (:,:)  ::  pic
+    character (len=*), intent(in)         ::  fname
+
+    integer   :: io, foo
+    integer   :: ix, iy
+    real      :: fk, fpix
+
+    write(0, '(1X, A)') "> spit_as_pgm to " // trim(fname)
+
+    open(newunit=io, file=fname)
+    write (io, '(a2)') "P2"
+    write (io, '(i0," ",i0)')  size(pic, 1), size(pic, 2)
+    write (io, '(i0)') 65535
+
+    foo = MAXVAL(pic)
+    if (foo .EQ. 0) then
+        print *, " IS SOMETHING WRONG GOING TO HAPPEN ?"
+        do ix = 1, size(pic)
+            write (io, "(i0)") 0
+        enddo
+    else
+        fk = float(foo)  / 65535.0
+        print *, "  max pix value", foo, "  fk =  ", fk
+        do iy = 1, ubound(pic, 2)
+            do ix = 1, ubound(pic, 1)
+                 fpix = float(pic(ix, iy)) / fk
+                 write (io, "(i0)") int(fpix)
+            end do
+        end do
+    endif
+    close(io)
+
+end subroutine
+!-------------------------------------------------------------------
+subroutine spit_as_pgm_16(pic, fname)
+    integer, intent(in), dimension (:,:)  ::  pic
+    character (len=*), intent(in)         ::  fname
+
+    integer   :: io, foo
+    integer   :: ix, iy
+
+    open(newunit=io, file=fname)
+    write (io, '(a2)') "P2"
+    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)
+        foo = pic(ix, iy)
+        if (foo .GT. 65535)  foo = 65530
+        write(io, "(i3)") foo
+      enddo
+    enddo
+    close(io)
+
+end subroutine
+!-------------------------------------------------------------------
+subroutine spit_as_pgm_8(pic, fname)
+    integer, intent(in), dimension (:,:)  ::  pic
+    character (len=*), intent(in)         ::  fname
+
+    integer   :: io, foo
+    integer   :: ix, iy
+
+    ! XXX print *, "> spit_as_pgm_8 to ", fname
+    foo = MAXVAL(pic)
+    ! XXX print *, "      max = ", foo
+    open(newunit=io, file=fname)
+    write (io, '(a2)') "P2"
+    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)
+        foo = pic(ix, iy)
+        if (foo .GT. 255)  foo = 255
+        write(io, "(i3)") foo
+      enddo
+    enddo
+    close(io)
+
+end subroutine
+!-------------------------------------------------------------------
+
+end module spitpgm