/*
 *   Cineon image file format library definitions.
 *   Cineon and DPX common structures.
 *
 *   This header file contains private details.
 *   User code should generally use cineonlib.h and dpxlib.h only.
 *   Hmm. I thought the two formats would have more in common!
 *
 *   Copyright 1999,2000,2001 David Hodson <hodsond@acm.org>
 *
 *   This program is free software; you can redistribute it and/or modify it
 *   under the terms of the GNU General Public License as published by the Free
 *   Software Foundation; either version 2 of the License, or (at your option)
 *   any later version.
 *
 *   This program is distributed in the hope that it will be useful, but
 *   WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 *   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 *   for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 */

#ifndef _LOG_IMAGE_CORE_H_
#define _LOG_IMAGE_CORE_H_

#include <stdio.h>
#include "logImageLib.h"

#ifdef __cplusplus
extern "C" {
#endif


typedef int (GetRowFn)(LogImageFile* logImage, unsigned short* row, int lineNum);
typedef int (SetRowFn)(LogImageFile* logImage, const unsigned short* row, int lineNum);
typedef void (CloseFn)(LogImageFile* logImage);

struct _Log_Image_File_t_
{
  /* specified in header */
  int width;
  int height;
  int depth;
  int bitsPerPixel;
  int imageOffset;

  /* file buffer, measured in longwords (4 byte) */
  int lineBufferLength;
  unsigned int* lineBuffer;

  /* pixel buffer, holds 10 bit pixel values */
  unsigned short* pixelBuffer;
  int pixelBufferUsed;

  /* io stuff */
  FILE* file;
  int reading;
  int fileYPos;

  /* byte conversion stuff */
  LogImageByteConversionParameters params;
#if 0
  float gamma;
  int blackPoint;
  int whitePoint;
#endif
  unsigned char lut10[1024];
  unsigned short lut8[256];

  /* pixel access functions */
  GetRowFn* getRow;
  SetRowFn* setRow;
  CloseFn* close;
};

void setupLut(LogImageFile*);

int pixelsToLongs(int numPixels);

/* typedefs used in original docs */
/* note size assumptions! */

typedef unsigned int U32;
typedef unsigned short U16;
typedef unsigned char U8;
typedef signed int S32;
typedef float R32;
typedef char ASCII;

R32 htonf(R32 f);
R32 ntohf(R32 f);
R32 undefined();
U16 reverseU16(U16 value);
U32 reverseU32(U32 value);
R32 reverseR32(R32 value);

#ifdef __cplusplus
}
#endif

#endif /* _LOG_IMAGE_CORE_H_ */
