/*

Copyright (c) 2002, 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 INCLUDED_IMF_C_RGBA_FILE_H
#define INCLUDED_IMF_C_RGBA_FILE_H


#include <stdlib.h>

#ifdef __cplusplus
extern "C" {
#endif

/*
** Interpreting unsigned shorts as 16-bit floating point numbers
*/

typedef unsigned short ImfHalf;

void	ImfFloatToHalf (float f,
			ImfHalf *h);

void	ImfFloatToHalfArray (int n,
			    const float f[/*n*/],
			    ImfHalf h[/*n*/]);

float	ImfHalfToFloat (ImfHalf h);

void	ImfHalfToFloatArray (int n,
			    const ImfHalf h[/*n*/],
			    float f[/*n*/]);

/*
** RGBA pixel; memory layout must be the same as struct Imf::Rgba.
*/

struct ImfRgba
{
    ImfHalf	r;
    ImfHalf	g;
    ImfHalf	b;
    ImfHalf	a;
};

typedef struct ImfRgba ImfRgba;

/*
** Magic number; this must be the same as Imf::MAGIC
*/

#define IMF_MAGIC               20000630

/*
** Version number; this must be the same as Imf::EXR_VERSION
*/

#define IMF_VERSION_NUMBER      2

/*
** Line order; values must the the same as in Imf::LineOrder.
*/

#define IMF_INCREASING_Y	0
#define IMF_DECREASING_Y	1
#define IMF_RAMDOM_Y		2


/*
** Compression types; values must be the same as in Imf::Compression.
*/

#define IMF_NO_COMPRESSION	0
#define IMF_RLE_COMPRESSION	1
#define IMF_ZIPS_COMPRESSION	2
#define IMF_ZIP_COMPRESSION	3
#define IMF_PIZ_COMPRESSION	4
#define IMF_PXR24_COMPRESSION	5


/*
** Channels; values must be the same as in Imf::RgbaChannels.
*/

#define IMF_WRITE_R		0x01
#define IMF_WRITE_G		0x02
#define IMF_WRITE_B		0x04
#define IMF_WRITE_A		0x08
#define IMF_WRITE_Y		0x10
#define IMF_WRITE_C		0x20
#define IMF_WRITE_RGB		0x07
#define IMF_WRITE_RGBA		0x0f
#define IMF_WRITE_YC		0x30
#define IMF_WRITE_YA		0x18
#define IMF_WRITE_YCA		0x38


/*
** Level modes; values must be the same as in Imf::LevelMode
*/

#define IMF_ONE_LEVEL		0
#define IMF_MIPMAP_LEVELS	1
#define IMF_RIPMAP_LEVELS	2


/*
** Level rounding modes; values must be the same as in Imf::LevelRoundingMode
*/

#define IMF_ROUND_DOWN		0
#define IMF_ROUND_UP		1


/*
** RGBA file header
*/

struct ImfHeader;
typedef struct ImfHeader ImfHeader;

ImfHeader *	ImfNewHeader (void);

void		ImfDeleteHeader (ImfHeader *hdr);

ImfHeader *	ImfCopyHeader (const ImfHeader *hdr);

void		ImfHeaderSetDisplayWindow (ImfHeader *hdr,
					   int xMin, int yMin,
					   int xMax, int yMax);

void		ImfHeaderDisplayWindow (const ImfHeader *hdr,
					int *xMin, int *yMin,
					int *xMax, int *yMax);

void		ImfHeaderSetDataWindow (ImfHeader *hdr,
					int xMin, int yMin,
					int xMax, int yMax);

void		ImfHeaderDataWindow (const ImfHeader *hdr,
				     int *xMin, int *yMin,
				     int *xMax, int *yMax);

void		ImfHeaderSetPixelAspectRatio (ImfHeader *hdr,
					      float pixelAspectRatio);

float		ImfHeaderPixelAspectRatio (const ImfHeader *hdr);

void		ImfHeaderSetScreenWindowCenter (ImfHeader *hdr,
						float x, float y);

void		ImfHeaderScreenWindowCenter (const ImfHeader *hdr,
					     float *x, float *y);

void		ImfHeaderSetScreenWindowWidth (ImfHeader *hdr,
					       float width);

float		ImfHeaderScreenWindowWidth (const ImfHeader *hdr);

void		ImfHeaderSetLineOrder (ImfHeader *hdr,
				       int lineOrder);

int		ImfHeaderLineOrder (const ImfHeader *hdr);
			    
void		ImfHeaderSetCompression (ImfHeader *hdr,
					 int compression);

int		ImfHeaderCompression (const ImfHeader *hdr);

int		ImfHeaderSetIntAttribute (ImfHeader *hdr,
					  const char name[],
					  int value);

int		ImfHeaderIntAttribute (const ImfHeader *hdr,
				       const char name[],
				       int *value);

int		ImfHeaderSetFloatAttribute (ImfHeader *hdr,
					    const char name[],
					    float value);

int		ImfHeaderSetDoubleAttribute (ImfHeader *hdr,
					     const char name[],
					     double value);

int		ImfHeaderFloatAttribute (const ImfHeader *hdr,
				         const char name[],
				         float *value);

int		ImfHeaderDoubleAttribute (const ImfHeader *hdr,
				          const char name[],
				          double *value);

int		ImfHeaderSetStringAttribute (ImfHeader *hdr,
					     const char name[],
					     const char value[]);

int		ImfHeaderStringAttribute (const ImfHeader *hdr,
				         const char name[],
					  const char **value);

int		ImfHeaderSetBox2iAttribute (ImfHeader *hdr,
					    const char name[],
					    int xMin, int yMin,
					    int xMax, int yMax);

int		ImfHeaderBox2iAttribute (const ImfHeader *hdr,
					 const char name[],
					 int *xMin, int *yMin,
					 int *xMax, int *yMax);

int		ImfHeaderSetBox2fAttribute (ImfHeader *hdr,
					    const char name[],
					    float xMin, float yMin,
					    float xMax, float yMax);

int		ImfHeaderBox2fAttribute (const ImfHeader *hdr,
					 const char name[],
					 float *xMin, float *yMin,
					 float *xMax, float *yMax);

int		ImfHeaderSetV2iAttribute (ImfHeader *hdr,
				         const char name[],
				         int x, int y);

int		ImfHeaderV2iAttribute (const ImfHeader *hdr,
				       const char name[],
				       int *x, int *y);

int		ImfHeaderSetV2fAttribute (ImfHeader *hdr,
				          const char name[],
				          float x, float y);

int		ImfHeaderV2fAttribute (const ImfHeader *hdr,
				       const char name[],
				       float *x, float *y);

int		ImfHeaderSetV3iAttribute (ImfHeader *hdr,
				          const char name[],
				          int x, int y, int z);

int		ImfHeaderV3iAttribute (const ImfHeader *hdr,
				       const char name[],
				       int *x, int *y, int *z);

int		ImfHeaderSetV3fAttribute (ImfHeader *hdr,
				          const char name[],
				          float x, float y, float z);

int		ImfHeaderV3fAttribute (const ImfHeader *hdr,
				       const char name[],
				       float *x, float *y, float *z);

int		ImfHeaderSetM33fAttribute (ImfHeader *hdr,
					   const char name[],
					   const float m[3][3]);

int		ImfHeaderM33fAttribute (const ImfHeader *hdr,
					const char name[],
					float m[3][3]);

int		ImfHeaderSetM44fAttribute (ImfHeader *hdr,
					   const char name[],
					   const float m[4][4]);

int		ImfHeaderM44fAttribute (const ImfHeader *hdr,
					const char name[],
					float m[4][4]);

/*
** RGBA output file
*/

struct ImfOutputFile;
typedef struct ImfOutputFile ImfOutputFile;

ImfOutputFile *	ImfOpenOutputFile (const char name[],
						   const ImfHeader *hdr,
						   int channels);

int			ImfCloseOutputFile (ImfOutputFile *out);

int			ImfOutputSetFrameBuffer (ImfOutputFile *out,
							 const ImfRgba *base,
							 size_t xStride,
							 size_t yStride);

int			ImfOutputWritePixels (ImfOutputFile *out,
						      int numScanLines);

int			ImfOutputCurrentScanLine (const ImfOutputFile *out);

const ImfHeader *	ImfOutputHeader (const ImfOutputFile *out);

int			ImfOutputChannels (const ImfOutputFile *out);


/*
** Tiled RGBA output file
*/

struct ImfTiledOutputFile;
typedef struct ImfTiledOutputFile ImfTiledOutputFile;

ImfTiledOutputFile *	ImfOpenTiledOutputFile (const char name[],
					        const ImfHeader *hdr,
						int channels,
						int xSize, int ySize,
						int mode, int rmode);

int		ImfCloseTiledOutputFile (ImfTiledOutputFile *out);

int		ImfTiledOutputSetFrameBuffer (ImfTiledOutputFile *out,
						      const ImfRgba *base,
						      size_t xStride,
						      size_t yStride);

int		ImfTiledOutputWriteTile (ImfTiledOutputFile *out,
						 int dx, int dy,
						 int lx, int ly);

const ImfHeader *	ImfTiledOutputHeader (const ImfTiledOutputFile *out);

int		ImfTiledOutputChannels (const ImfTiledOutputFile *out);

int		ImfTiledOutputTileXSize (const ImfTiledOutputFile *out);

int		ImfTiledOutputTileYSize (const ImfTiledOutputFile *out);

int		ImfTiledOutputLevelMode (const ImfTiledOutputFile *out);
int	       	ImfTiledOutputLevelRoundingMode
						(const ImfTiledOutputFile *out);


/*
** RGBA input file
*/

struct ImfInputFile;
typedef struct ImfInputFile ImfInputFile;

ImfInputFile *		ImfOpenInputFile (const char name[]);

int			ImfCloseInputFile (ImfInputFile *in);

int			ImfInputSetFrameBuffer (ImfInputFile *in,
						ImfRgba *base,
						size_t xStride,
						size_t yStride);

int			ImfInputReadPixels (ImfInputFile *in,
					    int scanLine1,
					    int scanLine2);

const ImfHeader *	ImfInputHeader (const ImfInputFile *in);

int			ImfInputChannels (const ImfInputFile *in);

const char *            ImfInputFileName (const ImfInputFile *in);


/*
** Tiled RGBA input file
*/

struct ImfTiledInputFile;
typedef struct ImfTiledInputFile ImfTiledInputFile;

ImfTiledInputFile *	ImfOpenTiledInputFile (const char name[]);

int		ImfCloseTiledInputFile (ImfTiledInputFile *in);

int		ImfTiledInputSetFrameBuffer (ImfTiledInputFile *in,
						     ImfRgba *base,
						     size_t xStride,
						     size_t yStride);

int		ImfTiledInputReadTile (ImfTiledInputFile *in,
					       int dx, int dy,
					       int lx, int ly);

const ImfHeader *	ImfTiledInputHeader (const ImfTiledInputFile *in);

int		ImfTiledInputChannels (const ImfTiledInputFile *in);

const char *		ImfTiledInputFileName (const ImfTiledInputFile *in);

int		ImfTiledInputTileXSize (const ImfTiledInputFile *in);

int		ImfTiledInputTileYSize (const ImfTiledInputFile *in);

int		ImfTiledInputLevelMode (const ImfTiledInputFile *in);

int	       	ImfTiledInputLevelRoundingMode
					       (const ImfTiledInputFile *in);

/*
** Lookup tables
*/

struct ImfLut;
typedef struct ImfLut ImfLut;

ImfLut *		ImfNewRound12logLut (int channels);

ImfLut *		ImfNewRoundNBitLut (unsigned int n, int channels);

void			ImfDeleteLut (ImfLut *lut);

void			ImfApplyLut (ImfLut *lut,
				     ImfRgba *data,
				     int nData,
				     int stride);
/*
** Most recent error message
*/

const char *		ImfErrorMessage (void);


#ifdef __cplusplus
} /* extern "C" */
#endif

#endif