/src/FreeImage/Source/OpenEXR/IlmImf/ImfMultiView.cpp
https://bitbucket.org/cabalistic/ogredeps/ · C++ · 396 lines · 181 code · 83 blank · 132 comment · 66 complexity · 246ec40a0df85c9f1fc2a51e443ed4cd MD5 · raw file
- ///////////////////////////////////////////////////////////////////////////
- //
- // Copyright (c) 2007, Weta Digital Ltd
- //
- // All rights reserved.
- //
- // Redistribution and use in source and binary forms, with or without
- // modification, are permitted provided that the following conditions are
- // met:
- // * Redistributions of source code must retain the above copyright
- // notice, this list of conditions and the following disclaimer.
- // * Redistributions in binary form must reproduce the above
- // copyright notice, this list of conditions and the following disclaimer
- // in the documentation and/or other materials provided with the
- // distribution.
- // * Neither the name of Weta Digital nor the names of
- // its contributors may be used to endorse or promote products derived
- // from this software without specific prior written permission.
- //
- // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- //
- ///////////////////////////////////////////////////////////////////////////
- //-----------------------------------------------------------------------------
- //
- // Functions related to accessing channels
- // and views in multi-view OpenEXR files.
- //
- //-----------------------------------------------------------------------------
- #include <ImfMultiView.h>
- using namespace std;
- namespace Imf {
- namespace {
- StringVector
- parseString (string name, char c = '.')
- {
- //
- // Turn name into a list of strings, separating
- // on char 'c' with whitespace stripped.
- //
- StringVector r;
- while (name.size() > 0)
- {
- size_t s = name.find (c);
- string sec = name.substr (0, s);
- //
- // Strip spaces from beginning
- //
- while (sec.size() > 0 && sec[0] == ' ')
- sec.erase (0, 1);
- //
- // Strip spaces from end
- //
- while (sec.size() > 0 && sec[sec.size() - 1] == ' ')
- sec.erase (sec.size() - 1);
- r.push_back (sec);
- //
- // Strip off name including ending 'c'
- //
- if (s == name.npos)
- name = "";
- else
- name = name.substr (s + 1);
- }
- 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 (int 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,
- const StringVector &multiView)
- {
- //
- // Return a list of channels not associated with any named view.
- //
- return channelsInView ("", channelList, multiView);
- }
- bool
- areCounterparts (const string &channel1,
- const string &channel2,
- const StringVector &multiView)
- {
- //
- // Given two channels, return true if they are the same
- // channel in two different views.
- //
- StringVector chan1 = parseString (channel1);
- unsigned int size1 = chan1.size(); // number of SECTIONS in string
- // name (not string length)
- StringVector chan2 = parseString (channel2);
- unsigned int size2 = chan2.size();
- if (size1 == 0 || size2 == 0)
- return false;
-
- //
- // channel1 and channel2 can't be counterparts
- // if either channel is in no view.
- //
- if (size1 > 1 && viewNum (chan1[size1 - 2], multiView) == -1)
- return false;
- if (size2 > 1 && viewNum (chan2[size2 - 2], multiView) == -1)
- return false;
- if (viewFromChannelName (channel1, multiView) ==
- viewFromChannelName (channel2, multiView))
- {
- //
- // channel1 and channel2 are not counterparts
- // if they are in the same view.
- //
- return false;
- }
- if (size1 == 1)
- {
- //
- // channel1 is a default channel - the channels will only be
- // counterparts if channel2 is of the form <view>.<channel1>
- //
- return size2 == 2 && chan1[0] == chan2[1];
- }
- if (size2 == 1)
- {
- //
- // channel2 is a default channel - the channels will only be
- // counterparts if channel1 is of the form <view>.<channel2>
- //
- return size1 == 2 && chan2[0] == chan1[1];
- }
- //
- // Neither channel is a default channel. To be counterparts both
- // channel names must have the same number of components, and
- // all components except the penultimate one must be the same.
- //
- if (size1 != size2)
- return false;
- for(int i = 0; i < size1; ++i)
- {
- if (i != size1 - 2 && chan1[i] != chan2[i])
- return false;
- }
- return true;
- }
- ChannelList
- channelInAllViews (const string &channelName,
- const ChannelList &channelList,
- const StringVector &multiView)
- {
- //
- // Given the name of a channel, return a
- // list of the same channel in all views.
- //
- ChannelList q;
- for (ChannelList::ConstIterator i=channelList.begin();
- i != channelList.end();
- ++i)
- {
- if (i.name() == channelName ||
- areCounterparts (i.name(), channelName, multiView))
- {
- q.insert (i.name(), i.channel());
- }
- }
- return q;
- }
- string
- channelInOtherView (const string &channelName,
- const ChannelList &channelList,
- const StringVector &multiView,
- const string &otherViewName)
- {
- //
- // Given the name of a channel in one view, return the
- // corresponding channel name for view otherViewName.
- //
- for (ChannelList::ConstIterator i=channelList.begin();
- i != channelList.end();
- ++i)
- {
- if (viewFromChannelName (i.name(), multiView) == otherViewName &&
- areCounterparts (i.name(), channelName, multiView))
- {
- return i.name();
- }
- }
- return "";
- }
- string
- insertViewName (const string &channel,
- const StringVector &multiView,
- int i)
- {
- //
- // Insert multiView[i] into the channel name if appropriate.
- //
- StringVector s = parseString (channel, '.');
- if (s.size() == 0)
- return ""; // nothing in, nothing out
- if (s.size() == 1 && i == 0)
- {
- //
- // Channel in the default view, with no periods in its name.
- // Do not insert view name.
- //
- return channel;
- }
- //
- // View name becomes penultimate section of new channel name.
- //
- string newName;
- for (int j = 0; j < s.size(); ++j)
- {
- if (j < s.size() - 1)
- newName += s[j] + ".";
- else
- newName += multiView[i] + "." + s[j];
- }
- return newName;
- }
- } // namespace Imf