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c      $Id: x31f.fm4 11680 2011-03-27 17:57:51Z airwin $
c      set / get tester.
c
c      Copyright (C) 2008  Alan W. Irwin
c      Copyright (C) 2008  Andrew Ross
c
c      This file is part of PLplot.
c
c      PLplot is free software; you can redistribute it and/or modify
c      it under the terms of the GNU Library General Public License as
c      published by the Free Software Foundation; either version 2 of the
c      License, or (at your option) any later version.
c
c      PLplot is distributed in the hope that it will be useful,
c      but WITHOUT ANY WARRANTY; without even the implied warranty of
c      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
c      GNU Library General Public License for more details.
c
c      You should have received a copy of the GNU Library General Public
c      License along with PLplot; if not, write to the Free Software
c      Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

c--------------------------------------------------------------------------
c main
c
c Demonstrates absolute positioning of graphs on a page.
c--------------------------------------------------------------------------

      implicit none
      include 'plplot_parameters.h'
      real*8 xmin, xmax, ymin, ymax, zxmin, zxmax, zymin, zymax
      real*8 xmid, ymid, wx, wy
      real*8 mar, aspect, jx, jy, ori
      integer win, level2, digmax, digits, compression1, compression2
      real*8 xp0, yp0, xp1, yp1, xp2, yp2
      integer xleng0, yleng0, xoff0, yoff0, xleng1, yleng1, xoff1, yoff1 
      integer xleng2, yleng2, xoff2, yoff2
      integer fam0, num0, bmax0, fam1, num1, bmax1, fam2, num2, bmax2
      integer r, g, b
      real*8 a
      integer r1(2), g1(2), b1(2)
      data r1 /0, 255/
      data g1 /255, 0/
      data b1 /0, 0/
      real*8 a1(2)
      data a1 /1.0d0, 1.0d0/
      character*256 fnam
      integer stderr
      integer status
      integer lnblnk

c     Parse and process command line arguments

      status = 0
      stderr = 0

      call plparseopts(PL_PARSE_FULL)

c     Test setting / getting familying parameters before plinit
c     Save values set by plparseopts to be restored later.
      call plgfam(fam0, num0, bmax0)
      fam1 = 0
      num1 = 10
      bmax1 = 1000
      call plsfam(fam1, num1, bmax1)

c     Retrieve the same values?
      call plgfam(fam2, num2, bmax2)
      write(*,'(A,I1,I3,I5)') 'family parameters: fam, num, bmax = ', 
     &     fam2, num2, bmax2
      if (fam2 .ne. fam1 .or. num2 .ne. num1 .or. bmax2 .ne. bmax1) then
         write(stderr,*) 'plgfam test failed'
         status = 1
      endif
c     Restore values set initially by plparseopts.
      call plsfam(fam0, num0, bmax0)

c     Test setting / getting page parameters before plinit
c     Save values set by plparseopts to be restored later.
      call plgpage(xp0, yp0, xleng0, yleng0, xoff0, yoff0)
      xp1 = 200.d0
      yp1 = 200.d0
      xleng1 = 400
      yleng1 = 200
      xoff1 = 10
      yoff1 = 20
      call plspage(xp1, yp1, xleng1, yleng1, xoff1, yoff1)

c     Retrieve the same values?
      call plgpage(xp2, yp2, xleng2, yleng2, xoff2, yoff2)
      write(*,'(A,2F11.6, 2I4, 2I3)') 
     &     'page parameters: xp, yp, xleng, yleng, xoff, yoff =',
     &     xp2, yp2, xleng2, yleng2, xoff2, yoff2
      if (xp2 .ne. xp1 .or. yp2 .ne. yp1 .or. xleng2 .ne. xleng1 .or. 
     &     yleng2 .ne. yleng1 .or. xoff2 .ne. xoff1 .or. 
     &     yoff2 .ne. yoff1 ) then
         write(stderr,*) 'plgpage test failed'
         status = 1
      endif
c     Restore values set initially by plparseopts.
      call plspage(xp0, yp0, xleng0, yleng0, xoff0, yoff0)

c     Test setting / getting compression parameter across plinit
      compression1 = 95
      call plscompression(compression1)

c     Test setting / getting familying parameters across plinit
      fam1 = 0
      num1 = 10
      bmax1 = 1000
      call plsfam(fam1, num1, bmax1)

c     Test setting / getting page parameters across plinit
      xp1 = 200.d0
      yp1 = 200.d0
      xleng1 = 400
      yleng1 = 200
      xoff1 = 10
      yoff1 = 20
      call plspage(xp1, yp1, xleng1, yleng1, xoff1, yoff1)

c     Initialize plplot

      call plinit()

c     Test if device initialization screwed around with the preset
c     compression parameter. 
      call plgcompression(compression2)
      write(*,'(A)') 'Output various PLplot parameters'
      write(*,'(A,I2)') 'compression parameter = ', compression2
      if (compression2 .ne. compression1) then
         write(stderr,*) 'plgcompression test failed'
         status = 1
      endif

c     Exercise plscolor, plscol0, plscmap1, and plscmap1a to make sure
c     they work without any obvious error messages.
      call plscolor(1)
      call plscol0(1, 255, 0, 0)
      call plscmap1(r1,g1,b1,2)
      call plscmap1a(r1,g1,b1,a1,2)
  
      call plglevel(level2)
      write(*,'(A,I1)') 'level parameter = ', level2
      if (level2 .ne. 1) then
         write(stderr,*) 'plglevel test failed.'
         status = 1
      endif

      call pladv(0)
      call plvpor(0.01d0, 0.99d0, 0.02d0, 0.49d0)
      call plgvpd(xmin, xmax, ymin, ymax)
      write(*,'(A,4F9.6)') 'plvpor: xmin, xmax, ymin, ymax =', 
     &     xmin, xmax, ymin, ymax
      if (xmin .ne. 0.01d0 .or. xmax .ne. 0.99d0 .or. 
     &     ymin .ne. 0.02d0 .or. ymax .ne. 0.49d0) then
         write(stderr,*) 'plgvpd test failed'
         status = 1
      endif
      xmid = 0.5*(xmin+xmax)
      ymid = 0.5*(ymin+ymax)

      call plwind(0.2d0, 0.3d0, 0.4d0, 0.5d0)
      call plgvpw(xmin, xmax, ymin, ymax)
      write(*,'(A,4F9.6)') 'plwind: xmin, xmax, ymin, ymax =', 
     &     xmin, xmax, ymin, ymax
      if (xmin .ne. 0.2d0 .or. xmax .ne. 0.3d0 .or. ymin .ne. 0.4d0 .or. 
     &     ymax .ne. 0.5d0) then
         write(stderr,*) 'plgvpw test failed',xmin,xmax,ymin,ymax
         status = 1
      endif

c     Get world coordinates for midpoint of viewport
      call plcalc_world(xmid,ymid,wx,wy,win)
      write(*,'(A,2F9.6,I2)') 'world parameters: wx, wy, win =', 
     &     wx, wy, win
      if (abs(wx-0.25d0).gt.1.0d-5 .or. abs(wy-0.45d0).gt.1.0d-5) then
         write(stderr,*) 'plcalc_world test failed'
         status = 1
      endif

c     Retrieve and print the name of the output file (if any)
      call plgfnam(fnam)
      if (lnblnk(fnam) .eq. 0) then
         write(*,'(A)') 'No output file name is set'
      else 
         write(*,'(A)') 'Output file name read'
      endif
      write(stderr,'(A,A)') 'Output file name is ', fnam(:lnblnk(fnam))

c     Set and get the number of digits used to display axis labels
c     Note digits is currently ignored in pls[xyz]ax and 
c     therefore it does not make sense to test the returned 
c     value
      call plsxax(3,0)
      call plgxax(digmax,digits)
      write(*,'(A,I2,I2)') 'x axis parameters: digmax, digits =', 
     &     digmax, digits
      if (digmax .ne. 3) then
         write(stderr,*) 'plgxax test failed'
         status = 1
      endif

      call plsyax(4,0)
      call plgyax(digmax,digits)
      write(*,'(A,I2,I2)') 'y axis parameters: digmax, digits =', 
     &     digmax, digits
      if (digmax .ne. 4) then
         write(stderr,*) 'plgyax test failed'
         status = 1
      endif

      call plszax(5,0)
      call plgzax(digmax,digits)
      write(*,'(A,I2,I2)') 'z axis parameters: digmax, digits =', 
     &     digmax, digits
      if (digmax .ne. 5) then
         write(stderr,*) 'plgzax test failed'
         status = 1
      endif
      
      call plsdidev(0.05d0, PL_NOTSET, 0.1d0, 0.2d0)
      call plgdidev(mar, aspect, jx, jy)
      write(*,'(A,4F9.6)') 'device-space window parameters: '//
     &     'mar, aspect, jx, jy =', mar, aspect, jx, jy
      if (mar .ne. 0.05d0 .or. jx .ne. 0.1d0 .or. jy .ne. 0.2d0) then
         write(stderr,*) 'plgdidev test failed'
         status = 1
      endif
      
      call plsdiori(1.0d0)
      call plgdiori(ori)
      write(*,'(A,F9.6)') 'ori parameter =', ori
      if (ori .ne. 1.0d0) then
         write(stderr,*) 'plgdiori test failed'
         status = 1
      endif
      
      call plsdiplt(0.1d0, 0.2d0, 0.9d0, 0.8d0)
      call plgdiplt(xmin, ymin, xmax, ymax)
      write(*,'(A,4F9.6)') 'plot-space window parameters: '//
     &     'xmin, ymin, xmax, ymax =', xmin, ymin, xmax, ymax
      if (xmin .ne. 0.1d0 .or. xmax .ne. 0.9d0 .or. ymin .ne. 0.2d0 .or. 
     &     ymax .ne. 0.8d0) then
         write(stderr,*) 'plgdiplt test failed'
         status = 1
      endif

      call plsdiplz(0.1d0, 0.1d0, 0.9d0, 0.9d0)
      call plgdiplt(zxmin, zymin, zxmax, zymax)
      write(*,'(A,4F9.6)') 'zoomed plot-space window parameters: '//
     &     'xmin, ymin, xmax, ymax =', zxmin, zymin, zxmax, zymax
      if ( abs(zxmin -(xmin + (xmax-xmin)*0.1d0)) .gt. 1.0d-5 .or.
     &     abs(zxmax -(xmin+(xmax-xmin)*0.9d0)) .gt. 1.0d-5 .or.
     &     abs(zymin -(ymin+(ymax-ymin)*0.1d0)) .gt. 1.0d-5 .or.
     &     abs(zymax -(ymin+(ymax-ymin)*0.9d0)) .gt. 1.0d-5 ) then
         write(stderr,*) 'plsdiplz test failed'
         status = 1
      endif
      
      call plscolbg(10,20,30)
      call plgcolbg(r, g, b)
      write(*,'(A,3I3)') 'background colour parameters: r, g, b =', 
     &     r, g, b
      if (r .ne. 10 .or. g .ne. 20 .or. b .ne. 30) then
         write(stderr,*) 'plgcolbg test failed'
         status = 1
      endif

      call plscolbga(20,30,40,0.5d0)
      call plgcolbga(r, g, b, a)
      write(*,'(A,3I3,F9.6)') 'background/transparency colour '//
     &     'parameters: r, g, b, a =', r, g, b, a
      if (r.ne.20 .or. g.ne.30 .or. b.ne.40 .or. a.ne.0.5d0) then
         write(stderr,*) 'plgcolbga test failed'
         status = 1
      endif

      call plend()
      call exit(status)
      end