# -*-python-*-
#--------------------------------------------------------------------------------
#
#       OpenAlea.SConsX: SCons extension package for building platform
#                        independant packages.
#
#       Copyright 2006-2009 INRIA - CIRAD - INRA
#
#       File author(s): Christophe Pradal <christophe.prada@cirad.fr>
#
#       Distributed under the Cecill-C License.
#       See accompanying file LICENSE.txt or copy at
#           http://www.cecill.info/licences/Licence_CeCILL-C_V1-en.html
#
#       OpenAlea WebSite : http://openalea.gforge.inria.fr
#
#--------------------------------------------------------------------------------
""" OpenGL configure environment. """

__license__ = "Cecill-C"
__revision__ = "$Id$"


import os, sys
from openalea.sconsx.config import *

exists = os.path.exists

class OpenGL:
   def __init__(self, config):
      self.name = 'opengl'
      self.config = config
      self._default = {}


   def default(self):
       if CONDA_ENV:
           self._default['include'] = pj(CONDA_LIBRARY_PREFIX, 'include')
           self._default['libpath'] = pj(CONDA_LIBRARY_PREFIX, 'lib')
           if isinstance(platform, Win32):
             self._default['libs'] = ['glu32']
           else:
             self._default['libs'] = ['GLU']

       elif isinstance(platform, Win32):
           #MVSdir = r'C:\Program Files\Microsoft Visual Studio\VC98'
           MVSdir = r'C:\Program Files\Microsoft Platform SDK'
           self._default['msvc_include'] = pj(MVSdir, 'Include')
           self._default['msvc_libpath'] = pj(MVSdir, 'Lib')

           mgw_dir = find_executable_path_from_env("mingw32-make.exe", strip_bin=True)
           mgw_dir = mgw_dir or r'C:\MinGW'
           self._default['mgw_include'] = pj(mgw_dir, 'include', 'GL')
           self._default['mgw_libpath'] = pj(mgw_dir, 'lib')

           self._default['include'] = self._default['msvc_include']
           self._default['libpath'] = self._default['msvc_lib']
           self._default['libs'] = ['opengl32','glu32']

       elif isinstance(platform, Posix):
           defdir = detect_posix_project_installpath('include/gl.h',['/usr/X11R6','/opt/X11'])
           self._default['include'] = join(defdir,'include')
           self._default['libpath']     = join(defdir,'lib') 
           self._default['libs'] = ['GLU']
           if isinstance(platform, Cygwin):
              self._default['libs'] = ['opengl32','glu32']


   def option( self, opts):
       self.default()

       if isinstance(platform, Darwin):
           opts.AddVariables(
                           ('gl_includes', 'GL include files',
                            self._default['include']),
                           ('gl_framework_path', 'GL framework path',
                            '/System/Library/Frameworks'),
                           ('gl_frameworks', 'OpenGL frameworks',
                            ['AGL', 'OpenGL'])
                           )
       else:
           opts.AddVariables(
                           ('gl_includes', 'GL include files',
                            self._default['include']),

                            (('gl_libpath','gl_lib'), 'GL library path',
                             self._default['libpath']),

                            ('gl_libs', 'GL library names',
                             self._default['libs'])

                            )


   def update(self, env):
      """ Update the environment with specific flags """
      if isinstance(platform, Darwin):
          env.AppendUnique(CPPPATH=[env['gl_includes']])
          env.AppendUnique(LINKFLAGS="-F%s"%str(env['gl_framework_path']))
          for fmk in env['gl_frameworks']:
              env.Append(LINKFLAGS=['-framework',str(fmk)])
          return
      if env.get('compiler', 'mingw') == 'mingw' and not CONDA_ENV:
          if env['gl_includes'] == self._default['msvc_include']:
              env['gl_includes'] = self._default['mgw_include']
          if env['gl_libpath'] == self._default['msvc_libpath']:
              env['gl_libpath'] = self._default['mgw_libpath']

      env.AppendUnique(CPPPATH=[env['gl_includes']])
      env.AppendUnique(LIBPATH=[env['gl_libpath']])
      env.AppendUnique(LIBS=env['gl_libs'])



   def configure(self, config):
      if not config.conf.CheckLibWithHeader('GL',['GL/gl.h', 'GL/glu.h'], 'c++', autoadd = 0):
         print("Error: gl.h not found, probably failure in automatic opengl detection")
         sys.exit(-1)


def create(config):
   " Create opengl tool "
   opengl = OpenGL(config)

   return opengl