view release on metacpan or  search on metacpan

src/Source/OpenEXR/IlmImf/ImfDeepScanLineInputFile.h  view on Meta::CPAN

    DeepScanLineInputFile (const Header &header, OPENEXR_IMF_INTERNAL_NAMESPACE::IStream *is,
                           int version, /*version field from file*/
                           int numThreads = globalThreadCount());


    //-----------------------------------------
    // Destructor -- deallocates internal data
    // structures, but does not close the file.
    //-----------------------------------------

    virtual ~DeepScanLineInputFile ();


    //------------------------
    // Access to the file name
    //------------------------

    const char *        fileName () const;


    //--------------------------
    // Access to the file header
    //--------------------------

    const Header &      header () const;


    //----------------------------------
    // Access to the file format version
    //----------------------------------

    int                 version () const;


    //-----------------------------------------------------------
    // Set the current frame buffer -- copies the FrameBuffer
    // object into the InputFile object.
    //
    // The current frame buffer is the destination for the pixel
    // data read from the file.  The current frame buffer must be
    // set at least once before readPixels() is called.
    // The current frame buffer can be changed after each call
    // to readPixels().
    //-----------------------------------------------------------

    void                setFrameBuffer (const DeepFrameBuffer &frameBuffer);


    //-----------------------------------
    // Access to the current frame buffer
    //-----------------------------------

    const DeepFrameBuffer & frameBuffer () const;


    //---------------------------------------------------------------
    // Check if the file is complete:
    //
    // isComplete() returns true if all pixels in the data window are
    // present in the input file, or false if any pixels are missing.
    // (Another program may still be busy writing the file, or file
    // writing may have been aborted prematurely.)
    //---------------------------------------------------------------

    bool                isComplete () const;


    //---------------------------------------------------------------
    // Read pixel data:
    //
    // readPixels(s1,s2) reads all scan lines with y coordinates
    // in the interval [min (s1, s2), max (s1, s2)] from the file,
    // and stores them in the current frame buffer.
    //
    // Both s1 and s2 must be within the interval
    // [header().dataWindow().min.y, header.dataWindow().max.y]
    //
    // The scan lines can be read from the file in random order, and
    // individual scan lines may be skipped or read multiple times.
    // For maximum efficiency, the scan lines should be read in the
    // order in which they were written to the file.
    //
    // readPixels(s) calls readPixels(s,s).
    //
    // If threading is enabled, readPixels (s1, s2) tries to perform
    // decopmression of multiple scanlines in parallel.
    //
    //---------------------------------------------------------------

    void                readPixels (int scanLine1, int scanLine2);
    void                readPixels (int scanLine);

    
  
    //---------------------------------------------------------------
    // Extract pixel data from pre-read block
    //
    // readPixels(rawPixelData,frameBuffer,s1,s2) reads all scan lines with y coordinates
    // in the interval [min (s1, s2), max (s1, s2)] from the data provided and
    // stores them in the provided frameBuffer.
    // the data can be obtained from a call to rawPixelData()
    //
    //
    // Both s1 and s2 must be within the data specified
    //
    // you must provide a frameBuffer with a samplecountslice, which must have been read
    // and the data valid - readPixels uses your sample count buffer to compute
    // offsets to the data it needs
    //
    // This call does not block, and is thread safe for clients with an existing
    // threading model. The InputFile's frameBuffer is not used in this call.
    //
    // This call is only provided for clients which have an existing threading model in place
    // and unpredictable access patterns to the data.
    // The fastest way to read an entire image is to enable threading,use setFrameBuffer then
    // readPixels(header().dataWindow().min.y, header.dataWindow().max.y)
    //
    //---------------------------------------------------------------
    
    void                readPixels (const char * rawPixelData,
                                    const DeepFrameBuffer & frameBuffer,