# Copyright 1999-2004 Gentoo Technologies, Inc.
# Distributed under the terms of the GNU General Public License v2
# $Header: $

# TODO:
#	o fix the VTK_DATA_ROOT problem (workaround in place now I think)
#   o /usr/lib/vtk/VTKConfig.cmake has some problems (usr/blah instead of
#		/usr/blah in many places).  As far as I know, this means you can't
#		build the Cxx examples...
#   o java bindings work?  (I don't think so...)

inherit flag-o-matic distutils

DESCRIPTION="visualization toolkit"
HOMEPAGE="http://www.vtk.org"
LICENSE="VTK"

SLOT="0"
KEYWORDS="~x86"

IUSE="doc data python tcltk java patented"

RDEPEND="python? ( >=dev-lang/python-2.0 )
	tcltk? ( >=dev-lang/tcl-8.2.3
	         >=dev-lang/tk-8.2.3 )
	java? ( virtual/jdk )
	media-libs/jpeg
	media-libs/tiff
	media-libs/libpng
	sys-libs/zlib
	dev-libs/expat"

DEPEND=">=dev-util/cmake-1.8
	${RDEPEND}"

SHORT_PV=`echo ${PV} | sed -e "s/\(^[0-9]*\.[0-9]*\).*/\1/"`
SRC_URI="ftp://public.kitware.com/pub/vtk/vtk${SHORT_PV}/moved_to_sourceforge/VTK-${PV}.tar.gz
	doc? ( ftp://public.kitware.com/pub/vtk/vtk${SHORT_PV}/moved_to_sourceforge/VTKDocHtml-${SHORT_PV}.tar.gz )
	data? ( ftp://public.kitware.com/pub/vtk/vtk${SHORT_PV}/moved_to_sourceforge/VTKData-${SHORT_PV}.tar.gz )"
	

S=${WORKDIR}/VTK


src_compile() {
	# gcc versions 3.2.x seem to have sse-related bugs that are triggered
	# by VTK when compiling for pentium3/4
	filter-mfpmath sse
	filter-flags "-msse -msse2"
	use x86 && append-flags "-mno-sse"

	# build list of config variable defines to pass to cmake
	CMAKE_VARIABLES="-DCMAKE_INSTALL_PREFIX:PATH=${D}/usr"
	CMAKE_VARIABLES="${CMAKE_VARIABLES} -DBUILD_SHARED_LIBS:BOOL=ON"
	# is local flag the right way to deal with this? 
	use patented && CMAKE_VARIABLES="${CMAKE_VARIABLES} -DVTK_USE_PATENTED:BOOL=ON"
	CMAKE_VARIABLES="${CMAKE_VARIABLES} -DVTK_USE_HYBRID:BOOL=ON"
	# should this be configurable?
	CMAKE_VARIABLES="${CMAKE_VARIABLES} -DVTK_USE_PARALLEL:BOOL=ON"
	use tcltk && CMAKE_VARIABLES="${CMAKE_VARIABLES} -DVTK_WRAP_TCL:BOOL=ON"
	use python && CMAKE_VARIABLES="${CMAKE_VARIABLES} -DVTK_WRAP_PYTHON:BOOL=ON"
	use java && CMAKE_VARIABLES="${CMAKE_VARIABLES} -DVTK_WRAP_JAVA:BOOL=ON"
	CMAKE_VARIABLES="${CMAKE_VARIABLES} -DVTK_USE_SYSTEM_JPEG:BOOL=ON"
	CMAKE_VARIABLES="${CMAKE_VARIABLES} -DVTK_USE_SYSTEM_PNG:BOOL=ON"
	CMAKE_VARIABLES="${CMAKE_VARIABLES} -DVTK_USE_SYSTEM_TIFF:BOOL=ON"
	CMAKE_VARIABLES="${CMAKE_VARIABLES} -DVTK_USE_SYSTEM_ZLIB:BOOL=ON"
	CMAKE_VARIABLES="${CMAKE_VARIABLES} -DVTK_USE_SYSTEM_EXPAT:BOOL=ON"
	# we do not run tests (but it might be a good idea to do so)
	CMAKE_VARIABLES="${CMAKE_VARIABLES} -DBUILD_TESTING:BOOL=OFF"

	# build the examples (presumably the Cxx ones -- haven't test this yet)
	#CMAKE_VARIABLES="${CMAKE_VARIABLES} -DBUILD_EXAMPLES:BOOL=OFF"

	# FIXME: setting VTK_DATA_ROOT here doesn't work!!  If I try to open one
	# of the examples, I get errors like this:
	# $ vtk Medical1.tcl
	# ERROR: In /var/tmp/portage/vtk-4.2.6-r1/work/VTK/IO/vtkVolume16Reader.cxx, line 334
	# vtkVolume16Reader (0x81270d8): Can't find file: /usr/lib/vtk/tcl/vtkbase/../../../../VTKData/Data/headsq/quarter.1
	# ERROR: In /var/tmp/portage/vtk-4.2.6-r1/work/VTK/Graphics/vtkPolyDataNormals.cxx, line 88
	# vtkPolyDataNormals (0x811d828): No data to generate normals for!
	use data && CMAKE_VARIABLES="${CMAKE_VARIABLES} -DVTK_DATA_ROOT:PATH=/usr/share/vtkdata"
	# I provide a kludge to make this work below using /etc/env


	# make cmake prefer searching libraries in /usr/lib (otherwise wrong ones -
	# like /opt/ibm-jdk-1.4.1/jre/bin/libjpeg.so instead of /usr/lib/libjpeg.so
	# - might be selected)
	export PATH="/usr/lib:${PATH}"
	cmake ${CMAKE_VARIABLES} . || die "cmake configuration failed"

	emake || die "emake failed"
}

src_install() {
	# 4.4 ebuild has make DESTDIR=${D} install || die
	# Does this matter?
	make install || die "make install failed"

	# fix the config file
	cat ${D}/usr/lib/vtk/VTKConfig.cmake | sed -e "s:${D}::g" > ${D}/usr/lib/vtk/VTKConfig.cmake.fixed
	mv -f ${D}/usr/lib/vtk/VTKConfig.cmake.fixed ${D}/usr/lib/vtk/VTKConfig.cmake
	
	# paths for dynamic linking
	LD_PATHS="/usr/lib/vtk"

	# python are not installed by 'make install'
	if [ `use python` ]; then
		cd ${S}/Wrapping/Python
		docinto vtk_python
		distutils_src_install
		distutils_python_version
		LD_PATHS="${LD_PATHS}:/usr/lib/python${PY_VER}/site-packages/vtk_python"
		# fix broken symlinks
		cd ${D}/usr/lib/python${PY_VER}/site-packages/vtk_python
		ln -s ../../../libvtk*Python*.so .
	fi

	if [ `use doc` ]; then
		docinto ""
		dohtml -r ${WORKDIR}/html/
		cd ${S}
		tar cf ${WORKDIR}/examples.tar Examples
		dodoc ${WORKDIR}/examples.tar
	fi

	#install vtk data used in many of the examples
	if [ `use data` ]; then
		dodir /usr/share/vtkdata
		#VTKData uses a hyphen instead of a dot
		SHORT_PV_HYPHEN=`echo ${SHORT_PV} | sed -e "s/\./-/"`
		mv ${WORKDIR}/VTKData-release-${SHORT_PV_HYPHEN}/* ${D}/usr/share/vtkdata/.
	fi

	# env.d stuff
	insinto /etc/env.d/
	echo "LDPATH=${LD_PATHS}" > 40vtk
	# Because setting VTK_DATA_ROOT doesn't seem to work during compiling, I'll set
	# it here until I can work out the problem above.
	if [ 'use data' ]; then
		echo "VTK_DATA_ROOT=/usr/share/vtkdata" >> 40vtk
	fi
	doins 40vtk
}

pkg_postinst() {
	if [ `use patented` ]; then
		ewarn "Using patented classes in commercial application requires a licence."
		ewarn "For more information read"
		ewarn "http://public.kitware.com/cgi-bin/vtkfaq?req=show&file=faq07.005.htp"
	fi
}