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

//

// 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,

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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

//

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

#ifndef IMFDEEPSCANLINEOUTPUTPART_H_

#define IMFDEEPSCANLINEOUTPUTPART_H_

#include "ImfDeepScanLineOutputFile.h"

#include "ImfMultiPartOutputFile.h"

#include "ImfNamespace.h"

#include "ImfExport.h"

OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER

class IMF_EXPORT DeepScanLineOutputPart

{

  public:

    DeepScanLineOutputPart(MultiPartOutputFile& multiPartFile, int partNumber);

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

    // Access to the file name

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

    const char *        fileName () const;

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

    // Access to the file header

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

    const Header &      header () const;

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

    // Set the current frame buffer -- copies the FrameBuffer

    // object into the OutputFile object.

    //

    // The current frame buffer is the source of the pixel

    // data written to the file.  The current frame buffer

    // must be set at least once before writePixels() is

    // called.  The current frame buffer can be changed

    // after each call to writePixels.

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

    void                setFrameBuffer (const DeepFrameBuffer &frameBuffer);

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

    // Access to the current frame buffer

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

    const DeepFrameBuffer & frameBuffer () const;

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

    // Write pixel data:

    //

    // writePixels(n) retrieves the next n scan lines worth of data from

    // the current frame buffer, starting with the scan line indicated by

    // currentScanLine(), and stores the data in the output file, and

    // progressing in the direction indicated by header.lineOrder().

    //

    // To produce a complete and correct file, exactly m scan lines must

    // be written, where m is equal to

    // header().dataWindow().max.y - header().dataWindow().min.y + 1.

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

    void                writePixels (int numScanLines = 1);

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

    // Access to the current scan line:

    //

    // currentScanLine() returns the y coordinate of the first scan line

    // that will be read from the current frame buffer during the next

    // call to writePixels().

    //

    // If header.lineOrder() == INCREASING_Y:

    //

    //  The current scan line before the first call to writePixels()

    //  is header().dataWindow().min.y.  After writing each scan line,

    //  the current scan line is incremented by 1.

    //

    // If header.lineOrder() == DECREASING_Y:

    //

    //  The current scan line before the first call to writePixels()

    //  is header().dataWindow().max.y.  After writing each scan line,

    //  the current scan line is decremented by 1.

    //

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

    int                 currentScanLine () const;

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

    // Shortcut to copy all pixels from an InputFile into this file,

    // without uncompressing and then recompressing the pixel data.

    // This file's header must be compatible with the InputFile's

    // header:  The two header's "dataWindow", "compression",

    // "lineOrder" and "channels" attributes must be the same.

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

    void                copyPixels (DeepScanLineInputFile &in);

    void                copyPixels (DeepScanLineInputPart &in);

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

    // Updating the preview image:

    //

    // updatePreviewImage() supplies a new set of pixels for the

    // preview image attribute in the file's header.  If the header

    // does not contain a preview image, updatePreviewImage() throws

    // an IEX_NAMESPACE::LogicExc.

    //

    // Note: updatePreviewImage() is necessary because images are

    // often stored in a file incrementally, a few scan lines at a

    // time, while the image is being generated.  Since the preview

    // image is an attribute in the file's header, it gets stored in

    // the file as soon as the file is opened, but we may not know

    // what the preview image should look like until we have written

    // the last scan line of the main image.

    //

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

    void                updatePreviewImage (const PreviewRgba newPixels[]);

  private:

      DeepScanLineOutputFile* file;

};

OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_EXIT

#endif /* IMFDEEPSCANLINEOUTPUTPART_H_ */