AC_PREREQ([2.60])
AC_INIT(vizservers, 0.1, rappture@nanohub.org)
AC_CONFIG_AUX_DIR(cf)
AC_CONFIG_HEADERS([nanovis/nvconf.h nanoscale/config.h])

AC_ARG_WITH(
    [tcllib],
    [AS_HELP_STRING([--with-tcllib[=DIR]],
        [location of Tcl binary library libtclstubs.a @<:@default=/usr/lib@:>@])],
    [with_tcllib=$withval],
    [with_tcllib=""])

AC_ARG_WITH(
    [rappture],
    [AS_HELP_STRING([--with-rappture[=DIR]],
        [location of rappture files lib/librappture.a and include/rappture.h @<:@default=/usr@:>@])],
    [with_rappture=$withval],
    [with_rappture=yes])

AC_ARG_WITH(
    [vtk-includes],
    [AS_HELP_STRING([--with-vtk-includes=DIR],
        [VTK include files are in DIR])],
    [with_vtk_includes=$withval],
    [with_vtk_includes=""])

AC_ARG_WITH(
    [vtk-libs],
    [AS_HELP_STRING([--with-vtk-libs=DIR],
        [VTK libraries are in DIR])],
    [with_vtk_libs=$withval],
    [with_vtk_libs=""])

AC_ARG_WITH(
    [vtk],
    [AS_HELP_STRING([--with-vtk=VERSION],
        [Version of VTK required])],
    [with_vtk=$withval],
    [with_vtk=yes])

RP_LANG_PYTHON

VERSION=0.0.1

#------------------------------------------------------------------------
# Handle the --prefix=... option
#------------------------------------------------------------------------

if test "${prefix}" = "NONE"; then
    prefix=/usr/local
fi
if test "${exec_prefix}" = "NONE"; then
    exec_prefix=$prefix
fi

if test "x${incdir}" == "x"; then
  incdir=${exec_prefix}/include
fi
libdir=${exec_prefix}/lib

if test "${libdir}" != "${prefix}/lib"; then
    LIB_SEARCH_DIRS="-L ${prefix}/lib -L ${libdir}"
else
    LIB_SEARCH_DIRS="-L ${libdir}"
fi

SC_CONFIG_CFLAGS


AC_PATH_X

AC_PROG_INSTALL
AC_PROG_RANLIB
AC_PROG_LN_S
AC_PROG_MKDIR_P

dnl find and test the C compiler
AC_PROG_CC
AC_PROG_CPP
AC_PROG_CXXCPP
AC_PROG_CXX
AC_LANG_CPLUSPLUS

AC_C_BIGENDIAN
AC_CHECK_SIZEOF(int, 4)
AC_CHECK_SIZEOF(long, 4)
AC_CHECK_SIZEOF(long long, 8)
AC_CHECK_SIZEOF(void *, 4)
AC_CHECK_SIZEOF(float, 4)

# Save the values as shell variables so that we can substitute them
# into bltHash.h for situtations where there's no bltInt.h.


LD_RPATH="";

#
# Need to check for the following dependencies:
#	Rappture headers and library (done)
#       Tcl headers and library (done)
#       GL headers and library
#       GLuT headers and library
#       GLui header and library
#       GLEW header and library
#       Cg headers and library
#       CgGL headers and library
#       pthread library
#       DX headers and library (done, sort of)
#       ffmpeg headers and library (started)
#

TCL_VERSION="8.4"
for dir in \
 ${exec_prefix} \
 ${exec_prefix}/lib \
 ${with_rappture} \
 ${with_rappture}/lib ; do
  tclconfig="${dir}/tclConfig.sh"
  if test -f "$tclconfig" ; then
    . $tclconfig
    break
  fi
done
TCL_INC_SPEC="$TCL_INCLUDE_SPEC"

if test "x$with_tcllib" != "x" ; then
   tclconfig="${with_tcllib}/tclConfig.sh"
   if test -f "$tclconfig" ; then
    . $tclconfig
   fi
   TCL_LIB_SPEC="-L${with_tcllib} -ltcl${TCL_VERSION}"
fi
if test "x$with_tclinclude" != "x" ; then
   TCL_INC_SPEC="-I${with_tclinclude}"
fi

RP_DIR=""
AC_MSG_CHECKING([for rappture])
if test "$with_rappture" == "yes" ; then
  for dir in "$exec_prefix" "/usr" ; do
    if test -r "$dir/include/rappture2/rappture2.h" -a \
     -r "$dir/lib/librappture.a"; then
      RP_DIR="$dir"
      RP_INC_SPEC="-I$dir/include -I$dir/include/rappture2"
      RP_LIB_DIR="$dir/lib"
      AC_MSG_RESULT([$dir])
      break
    fi
  done
else
  if test ! -d "$with_rappture" ; then 
    AC_MSG_ERROR([--with-rappture: no such directory $with_rappture])
  fi
  RP_DIR=$with_rappture
  RP_INC_SPEC="-I$with_rappture/include -I$with_rappture/include/rappture2"
  RP_LIB_DIR="$with_rappture/lib"
fi
if test "x${RP_DIR}" = "x" ; then
  AC_MSG_ERROR([cannot find rappture.h and librappture2.a, try using --with-rappture])
else
  AC_MSG_RESULT([$with_rappture])
fi

dnl Prefer our VTK installation over systems. --with-vtk overrides.
if test "$with_vtk" != "no" ; then
  if test "$with_vtk" = "yes" ; then
    for dir in vtk-5.{9,8,7,6,5,4,3,2,1} ; do 
      if test -d "${libdir}/$dir" -a -d "${incdir}/$dir"; then
	VTK_LIB_SPEC="-L${libdir}/$dir"
	VTK_LIB_DIR="${libdir}/$dir"
	VTK_INC_SPEC="-I${incdir}/$dir"
	break
      fi
      if test -d "/usr/lib/$dir" -a -d "/usr/include/$dir"; then
	VTK_LIB_SPEC=-L/usr/lib/$dir
	VTK_LIB_DIR=/usr/lib/$dir
	VTK_INC_SPEC=-I/usr/include/$dir
	break
      fi
    done
  fi
fi

if test "x$with_vtk_includes" != "x"; then
   VTK_INC_SPEC=-I$with_vtk_includes
fi

if test "x$with_vtk_libs" != "x"; then
   VTK_LIB_DIR=$with_vtk_libs
   VTK_LIB_SPEC="-L$with_vtk_libs"
fi

save_CPPFLAGS=$CPPFLAGS
CPPFLAGS=$VTK_INC_SPEC
AC_CHECK_HEADERS([vtkSmartPointer.h], [], [AC_MSG_WARN([cannot find vtkSmartPointer.h])])
CPPFLAGS=$save_CPPFLAGS

AC_CHECK_HEADER([GL/glui.h])
AC_CHECK_HEADER([glui.h])
AC_CHECK_HEADER([GL/glut.h])
AC_CHECK_HEADER([GL/glew.h])

AC_CHECK_HEADERS([stdio.h unistd.h stdlib.h string.h sys/types.h])
AC_CHECK_HEADERS([sys/socket.h sys/time.h netinet/in.h arpa/inet.h netdb.h])

AC_CHECK_FUNCS([accept4])

AC_MSG_CHECKING([for OpenDX headers])
DX_INC_DIR=""
for dir in \
 /apps/rappture/include \
 /usr/dx/include \
 /usr/include
do
  if test -r "${dir}/dx/dx.h" ; then
    DX_INC_DIR="$dir"
    break
  fi
done
if test "x${DX_INC_DIR}" = "x" ; then
  AC_MSG_WARN([cannot find OpenDX include files])
  DX_INC_SPEC=""
elif test "${DX_INC_DIR}" = "/usr/include" ; then
  DX_INC_SPEC=""
else 
  DX_INC_SPEC="-I{DX_INC_DIR}"
fi
AC_MSG_RESULT([${DX_INC_DIR}])

DX_LIB_DIR=""
for dir in \
 /usr/lib \
 /usr/lib64 \
 /usr/dx/lib_linux \
 /usr/lib/dx/lib_linux \
 /usr/lib64/dx/lib_linux \
 /apps/rappture/lib 
do
  saveLDFLAGS=$LDFLAGS
  LDFLAGS="-L$dir $LDFLAGS"
  unset ac_cv_lib_DXcallm_DXGetComponentValue
  AC_CHECK_LIB([DXcallm], [DXGetComponentValue], [found=yes], [found=no], [-lX11])
  LDFLAGS=$saveLDFLAGS
  if test "$found" = "yes" ; then
    DX_LIB_DIR="$dir"
    break
  fi
done
if test "x${DX_LIB_DIR}" = "x" ; then
  AC_MSG_WARN([cannot find OpenDX libraries])
fi

AC_MSG_CHECKING([for libDXcallm library])
if test "x${DX_LIB_DIR}" = "x" -o "${DX_LIB_DIR}" = "/usr/lib" -o "${DX_LIB_DIR}" = "/usr/lib64"; then
  DX_LIB_SPEC=""
else
  DX_LIB_SPEC="-L${DX_LIB_DIR}"
fi
AC_MSG_RESULT([$DX_LIB_SPEC])

AC_CHECK_HEADERS([opencv/cv.h opencv/highgui.h])
AC_CHECK_LIB([highgui], [cvLoadImage])

save_CPPFLAGS=$CPPFLAGS
# Test for redhat-specific location of ffmpeg headers. 
if test -d "/usr/include/ffmpeg" ; then 
  CPPFLAGS="$CPPFLAGS -I/usr/include/ffmpeg"
  FF_INC_SPEC="-I/usr/include/ffmpeg"
fi

AC_CHECK_HEADERS([ffmpeg/avcodec.h libavcodec/avcodec.h ffmpeg/avformat.h libavformat/avformat.h ffmpeg/avutil.h libavutil/avutil.h],,,[
#define SIZEOF_LONG ${ac_cv_sizeof_long}
#if SIZEOF_LONG == 8
#  define INT64_C(c)  c ## L
#  define UINT64_C(c) c ## UL
#else
#  define INT64_C(c)  c ## LL
#  define UINT64_C(c) c ## ULL
#endif
])
CPPFLAGS=$save_CPPFLAGS

AC_CHECK_LIB([avcodec], [avcodec_alloc_frame])
# Fallback to deprecated av_alloc_format_context if avformat_alloc_context isn't found
AC_CHECK_LIB([avformat], [avformat_alloc_context], [],
    AC_CHECK_LIB([avformat], [av_alloc_format_context], [], 
        [AC_MSG_WARN([libavformat not usable])]))
AC_CHECK_FUNCS([avformat_alloc_context])
AC_CHECK_LIB([avutil], [av_free])
AC_CHECK_FUNCS([img_convert])


AC_MSG_CHECKING([for nVidia Cg installation])
CG_DIR=""
for dir in \
 /opt/nvidia-cg-toolkit \
 /usr/cg \
 /usr
do
  if test -r "$dir/include" ; then
    CG_DIR=$dir
    break
  fi
done
AC_MSG_RESULT([${CG_DIR}])

CG_INC_DIR="$dir/include"
CG_LIB_DIR="$dir/lib"

save_CPPFLAGS=$CPPFLAGS
CPPFLAGS="-I${CG_INC_DIR} $CPPFLAGS"
AC_CHECK_HEADERS([Cg/cgGL.h], [], AC_MSG_WARN([cannot find nVidia Cg headers]))
CPPFLAGS=$save_CPPFLAGS

if test "${CG_DIR}" = "/usr" ; then
  CG_DIR=""
else 
  LD_RPATH="$loader_run_path:${CG_LIB_DIR}"
fi

SUBDIRS="nanoscale nanovis pymolproxy vtkvis"

AC_SUBST(CFLAGS_DEBUG)
AC_SUBST(CFLAGS_OPTIMIZE)
AC_SUBST(CG_DIR)
AC_SUBST(CG_INC_DIR)
AC_SUBST(CG_LIB_DIR)
AC_SUBST(DX_INC_SPEC)
AC_SUBST(DX_LIB_SPEC)
AC_SUBST(FF_INC_SPEC)
AC_SUBST(LD_RPATH)
AC_SUBST(RP_DIR)
AC_SUBST(RP_INC_SPEC)
AC_SUBST(RP_LIB_DIR)
AC_SUBST(SHLIB_CFLAGS)
AC_SUBST(SHLIB_LD)
AC_SUBST(SHLIB_LDFLAGS)
AC_SUBST(SHLIB_SUFFIX)
AC_SUBST(SIZEOF_FLOAT)
AC_SUBST(SIZEOF_INT)
AC_SUBST(SIZEOF_LONG)
AC_SUBST(SIZEOF_LONG_LONG)
AC_SUBST(SIZEOF_VOID_P)
AC_SUBST(STLIB_LD)
AC_SUBST(SUBDIRS)
AC_SUBST(PYTHON)
AC_SUBST(TCL_INC_SPEC)
AC_SUBST(TCL_LIB_SPEC)
AC_SUBST(TCL_VERSION)
AC_SUBST(VERSION)
AC_SUBST(VTK_INC_SPEC)
AC_SUBST(VTK_LIB_DIR)

AC_OUTPUT([
   Makefile \
   nanoscale/Makefile \
   nanoscale/renderservers.tcl \
   nanovis/Makefile \
   nanovis/newmat11/Makefile \
   nanovis/R2/src/Makefile \
   nanovis/vrutil/Makefile \
   nanovis/vrmath/Makefile \
   nanovis/vr3d/Makefile \
   nanovis/imgLoaders/Makefile \
   nanovis/transfer-function/Makefile \
   pymolproxy/Makefile \
   pymolproxy/pymol \
   vtkvis/Doxyfile \
   vtkvis/Makefile \
   start_viz.sh \
   start_nanoscale.sh])