#include <petsc/private/fortranimpl.h>
#include <petscdraw.h>
#include <petscviewer.h>

#if defined(PETSC_HAVE_FORTRAN_CAPS)
  #define petsc_viewer_draw__       PETSC_VIEWER_DRAW_BROKEN
  #define petscviewerdrawgetdraw_   PETSCVIEWERDRAWGETDRAW
  #define petscviewerdrawgetdrawlg_ PETSCVIEWERDRAWGETDRAWLG
  #define petscviewerdrawopen_      PETSCVIEWERDRAWOPEN
#elif !defined(PETSC_HAVE_FORTRAN_UNDERSCORE)
  #define petsc_viewer_draw__       petsc_viewer_draw_
  #define petscviewerdrawgetdraw_   petscviewerdrawgetdraw
  #define petscviewerdrawgetdrawlg_ petscviewerdrawgetdrawlg
  #define petscviewerdrawopen_      petscviewerdrawopen
#endif

#if defined(PETSC_HAVE_FORTRAN_UNDERSCORE_UNDERSCORE)
  #define petsc_viewer_draw__ petsc_viewer_draw___
#endif

PETSC_EXTERN PetscViewer petsc_viewer_draw__(MPI_Comm *comm)
{
  return PETSC_VIEWER_DRAW_(MPI_Comm_f2c(*(MPI_Fint *)&*comm));
}

PETSC_EXTERN void petscviewerdrawgetdraw_(PetscViewer *vin, int *win, PetscDraw *draw, PetscErrorCode *ierr)
{
  PetscViewer v;
  PetscPatchDefaultViewers_Fortran(vin, v);
  *ierr = PetscViewerDrawGetDraw(v, *win, draw);
}

PETSC_EXTERN void petscviewerdrawgetdrawlg_(PetscViewer *vin, int *win, PetscDrawLG *drawlg, PetscErrorCode *ierr)
{
  PetscViewer v;
  PetscPatchDefaultViewers_Fortran(vin, v);
  *ierr = PetscViewerDrawGetDrawLG(v, *win, drawlg);
}

PETSC_EXTERN void petscviewerdrawopen_(MPI_Comm *comm, char *display, char *title, int *x, int *y, int *w, int *h, PetscViewer *v, PetscErrorCode *ierr, PETSC_FORTRAN_CHARLEN_T len1, PETSC_FORTRAN_CHARLEN_T len2)
{
  char *c1, *c2;

  FIXCHAR(display, len1, c1);
  FIXCHAR(title, len2, c2);
  *ierr = PetscViewerDrawOpen(MPI_Comm_f2c(*(MPI_Fint *)&*comm), c1, c2, *x, *y, *w, *h, v);
  if (*ierr) return;
  FREECHAR(display, c1);
  FREECHAR(title, c2);
}