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src/Source/OpenEXR/IlmImf/ImfMultiView.cpp  view on Meta::CPAN

    return r;
}


int
viewNum (const string &view, const StringVector &multiView)
{
    //
    // returns which view number is called 'view'
    // returns -1 if no member of multiView is 'view'
    // (i.e. if viewNum() returns -1, 'view' isn't a view name
    //       if viewNum() returns 0, 'view' is the default view
    // otherwise, it's some other (valid) view
    //

    for (size_t i = 0; i < multiView.size(); ++i)
    {
	if (multiView[i] == view)
	    return i;
    }

    return -1;
}

} // namespace


string
defaultViewName (const StringVector &multiView)
{
    if (multiView.size() > 0)
	return multiView[0];
    else
	return "";
}


string
viewFromChannelName (const string &channel,
		     const StringVector &multiView)
{
    //
    // Given the name of a channel, return the name of the view to
    // which it belongs.
    //

    //
    // View name is penultimate section of name separated by periods ('.'s)
    //

    StringVector s = parseString (channel, '.');

    if (s.size() == 0)
	return ""; // nothing in, nothing out

    if (s.size() == 1)
    {
	//
	// Return default view name.
	// The rules say ALL channels with no periods
	// in the name belong to the default view.
	//

	return multiView[0];
    }
    else
    { 
	//
	// size >= 2 - the last part is the channel name,
	// the next-to-last part is the view name.
	// Check if that part of the name really is
	// a valid view and, if it is, return it.
	//

	const string &viewName = s[s.size() - 2];

	if (viewNum (viewName, multiView) >= 0)
	    return viewName;
	else
	    return ""; // not associated with any particular view
    }
}


ChannelList
channelsInView (const string & viewName,
	        const ChannelList & channelList,
		const StringVector & multiView)
{
    //
    // Return a list of all channels belonging to view viewName.
    //

    ChannelList q;

    for (ChannelList::ConstIterator i = channelList.begin();
	 i != channelList.end();
	 ++i)
    {
	//
	// Get view name for this channel
	//

	string view = viewFromChannelName (i.name(), multiView);


	//
	// Insert channel into q if it's a member of view viewName
	//

	if (view == viewName)
	   q.insert (i.name(), i.channel());
    }

    return q;
}


ChannelList
channelsInNoView (const ChannelList &channelList,