///////////////////////////////////////////////////////////////////////////

//

// Copyright (c) 2011, Industrial Light & Magic, a division of Lucas

// Digital Ltd. LLC

//

// 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 Industrial Light & Magic 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.

//

///////////////////////////////////////////////////////////////////////////

#ifndef IMFDEEPFRAMEBUFFER_H_

#define IMFDEEPFRAMEBUFFER_H_

#include "ImfFrameBuffer.h"

#include "ImfNamespace.h"

#include "ImfExport.h"

OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER

//--------------------------------------------------------

// Description of a single deep slice of the frame buffer:

//--------------------------------------------------------

struct IMF_EXPORT DeepSlice : public Slice

{

    //---------------------------------------------------------------------

    // The stride for each sample in this slice.

    //

    // Memory layout:  The address of sample i in pixel (x, y) is

    //

    //  base + (xp / xSampling) * xStride + (yp / ySampling) * yStride

    //       + i * sampleStride

    //

    // where xp and yp are computed as follows:

    //

    //  * If we are reading or writing a scanline-based file:

    //

    //      xp = x

    //      yp = y

    //

    //  * If we are reading a tile whose upper left coorner is at (xt, yt):

    //

    //      if xTileCoords is true then xp = x - xt, else xp = x

    //      if yTileCoords is true then yp = y - yt, else yp = y

    //

    //---------------------------------------------------------------------

    int sampleStride;

    //------------

    // Constructor

    //------------

    DeepSlice (PixelType type = HALF,

               char * base = 0,

               size_t xStride = 0,

               size_t yStride = 0,

               size_t sampleStride = 0,

               int xSampling = 1,

               int ySampling = 1,

               double fillValue = 0.0,

               bool xTileCoords = false,

               bool yTileCoords = false);

};

//-----------------

// DeepFrameBuffer.

//-----------------

class IMF_EXPORT DeepFrameBuffer

{

  public:

    //------------

    // Add a slice

    //------------

    void                        insert (const char name[],

                                        const DeepSlice &slice);

    void                        insert (const std::string &name,

                                        const DeepSlice &slice);

    //----------------------------------------------------------------

    // Access to existing slices:

    //

    // [n]              Returns a reference to the slice with name n.

    //                  If no slice with name n exists, an IEX_NAMESPACE::ArgExc

    //                  is thrown.

    //

    // findSlice(n)     Returns a pointer to the slice with name n,

    //                  or 0 if no slice with name n exists.

    //

    //----------------------------------------------------------------

    DeepSlice &                 operator [] (const char name[]);

    const DeepSlice &           operator [] (const char name[]) const;

    DeepSlice &                 operator [] (const std::string &name);

    const DeepSlice &           operator [] (const std::string &name) const;

    DeepSlice *                 findSlice (const char name[]);

    const DeepSlice *           findSlice (const char name[]) const;

    DeepSlice *                 findSlice (const std::string &name);

    const DeepSlice *           findSlice (const std::string &name) const;

    //-----------------------------------------

    // Iterator-style access to existing slices

    //-----------------------------------------

    typedef std::map <Name, DeepSlice> SliceMap;

    class Iterator;

    class ConstIterator;

    Iterator                    begin ();

    ConstIterator               begin () const;

    Iterator                    end ();

    ConstIterator               end () const;

    Iterator                    find (const char name[]);

    ConstIterator               find (const char name[]) const;

    Iterator                    find (const std::string &name);

    ConstIterator               find (const std::string &name) const;

    //----------------------------------------------------

    // Public function for accessing a sample count slice.

    //----------------------------------------------------

    void                        insertSampleCountSlice(const Slice & slice);

    const Slice &               getSampleCountSlice() const;

  private:

    SliceMap                    _map;

    Slice                       _sampleCounts;

};

//----------

// Iterators

//----------

class DeepFrameBuffer::Iterator

{

  public:

    Iterator ();

    Iterator (const DeepFrameBuffer::SliceMap::iterator &i);

    Iterator &                  operator ++ ();

    Iterator                    operator ++ (int);

    const char *                name () const;

    DeepSlice &                 slice () const;

  private:

    friend class DeepFrameBuffer::ConstIterator;

    DeepFrameBuffer::SliceMap::iterator _i;

};

class DeepFrameBuffer::ConstIterator

{

  public:

    ConstIterator ();

    ConstIterator (const DeepFrameBuffer::SliceMap::const_iterator &i);

    ConstIterator (const DeepFrameBuffer::Iterator &other);

    ConstIterator &             operator ++ ();

    ConstIterator               operator ++ (int);

    const char *                name () const;

    const DeepSlice &           slice () const;

  private:

    friend bool operator == (const ConstIterator &, const ConstIterator &);

    friend bool operator != (const ConstIterator &, const ConstIterator &);

    DeepFrameBuffer::SliceMap::const_iterator _i;

};

//-----------------

// Inline Functions

//-----------------

inline

DeepFrameBuffer::Iterator::Iterator (): _i()

{

    // empty

}

inline

DeepFrameBuffer::Iterator::Iterator (const DeepFrameBuffer::SliceMap::iterator &i):

    _i (i)

{

    // empty

}

inline DeepFrameBuffer::Iterator &

DeepFrameBuffer::Iterator::operator ++ ()

{

    ++_i;

    return *this;

}

inline DeepFrameBuffer::Iterator

DeepFrameBuffer::Iterator::operator ++ (int)

{

    Iterator tmp = *this;

    ++_i;

    return tmp;

}

inline const char *

DeepFrameBuffer::Iterator::name () const

{

    return *_i->first;

}

inline DeepSlice &

DeepFrameBuffer::Iterator::slice () const

{

    return _i->second;

}

inline

DeepFrameBuffer::ConstIterator::ConstIterator (): _i()

{

    // empty

}

inline

DeepFrameBuffer::ConstIterator::ConstIterator

    (const DeepFrameBuffer::SliceMap::const_iterator &i): _i (i)

{

    // empty

}

inline

DeepFrameBuffer::ConstIterator::ConstIterator (const DeepFrameBuffer::Iterator &other):

    _i (other._i)

{

    // empty

}

inline DeepFrameBuffer::ConstIterator &

DeepFrameBuffer::ConstIterator::operator ++ ()

{

    ++_i;

    return *this;

}

inline DeepFrameBuffer::ConstIterator

DeepFrameBuffer::ConstIterator::operator ++ (int)

{

    ConstIterator tmp = *this;

    ++_i;

    return tmp;

}

inline const char *

DeepFrameBuffer::ConstIterator::name () const

{

    return *_i->first;

}

inline const DeepSlice &

DeepFrameBuffer::ConstIterator::slice () const

{

    return _i->second;

}

inline bool

operator == (const DeepFrameBuffer::ConstIterator &x,

             const DeepFrameBuffer::ConstIterator &y)

{

    return x._i == y._i;

}

inline bool

operator != (const DeepFrameBuffer::ConstIterator &x,

             const DeepFrameBuffer::ConstIterator &y)

{

    return !(x == y);

}

OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_EXIT

#endif /* IMFDEEPFRAMEBUFFER_H_ */