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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* Copyright by the Board of Trustees of the University of Illinois. *
* All rights reserved. *
* *
* This file is part of HDF5. The full HDF5 copyright notice, including *
* terms governing use, modification, and redistribution, is contained in *
* the COPYING file, which can be found at the root of the source code *
* distribution tree, or in https://www.hdfgroup.org/licenses. *
* If you do not have access to either file, you may request a copy from *
* help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*
* Title: GIF.H
* Purpose: GIF Header file
*/
#ifndef GIF_H_
#define GIF_H_ 1
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "hdf5.h"
#define MAX_PAL 768
/* typedef H5T_NATIVE_UINT8 GIFBYTE; */
typedef unsigned char GIFBYTE;
/* typedef H5T_NATIVE_UINT16 GIFWORD; */
typedef unsigned long GIFWORD;
typedef char GIFCHAR;
#ifndef boolean
typedef unsigned char boolean;
#endif
#ifndef false
#define false 0
#endif
#ifndef true
#define true 1
#endif
/* Set the EndianOrder.
** The GIF Reader file should do this.
** Set EndianOrder = 0 if machine is little endian
** EndianOrder = 1 if machine is big endian.
*/
extern int EndianOrder;
/*
** The GIF header format.
**
** This structure actually contains the header, logical screen
** descriptor, and the global color table for the GIF image.
*/
typedef struct _GifHeader { /* Offset Description */
GIFBYTE PackedField; /* 0Ah Color Information */
GIFWORD TableSize;
GIFBYTE ImageCount; /* Keep a count of the number of images */
GIFBYTE CommentCount;
GIFBYTE ApplicationCount;
GIFBYTE PlainTextCount;
GIFBYTE HDFPalette[256][3];
GIFBYTE HeaderDump[6]; /* GIFBYTE array to dump header contents */
GIFBYTE LSDDump[7]; /* Logical Screen Descriptor dump */
} GIFHEAD;
/*
** The GIF Image Descriptor.
*/
typedef struct _GifImageDescriptor {
GIFWORD ImageWidth; /* Width of the image in pixels */
GIFWORD ImageHeight; /* Height of the image in pixels */
GIFBYTE PackedField; /* Image and Color Table Data Information */
GIFWORD TableSize;
GIFWORD CodeSize; /* Minimum LZW CodeSize for image data */
GIFBYTE HDFPalette[256][3];
GIFBYTE GIDDump[9]; /* GifImageDescriptor dump */
GIFBYTE *Image; /* Decompressed Raster Image */
GIFBYTE *GIFImage;
} GIFIMAGEDESC;
/*
** GIF 89a Graphic Control Extension Block
*/
typedef struct _GifGraphicControlExtension {
GIFBYTE GCEDump[5]; /* Graphic Control Extension Dump */
} GIFGRAPHICCONTROL;
/*
** GIF 89a Plain Text Extension Block
*/
typedef struct _GifPlainTextExtension {
GIFBYTE PTEDump[15]; /* Plain Text Extension Dump */
GIFBYTE *PlainTextData; /* Plain Text data sub-blocks */
GIFWORD DataSize;
} GIFPLAINTEXT;
/*
** GIF 89a Application Extension Block
*/
typedef struct _GifApplicationExtension {
GIFBYTE AEDump[14]; /* Application Extension Dump */
GIFBYTE *ApplicationData; /* Application data sub-blocks */
GIFWORD DataSize;
} GIFAPPLICATION;
/*
** GIF 89a Comment Extension Block
*/
typedef struct _GifCommentExtension {
GIFBYTE CEDump[2]; /* Comment Extension Dump */
GIFBYTE *CommentData; /* Comment data sub-blocks */
GIFWORD DataSize;
GIFBYTE Terminator; /* Block Terminator (always 0) */
} GIFCOMMENT;
/*
** GIF to HDF Memory Struct
** Purpose : The gif to hdf structure is used to pass all the
** gif data to the memory, which gets caught by the hdf driver
** Its the drivers job to put the data in the appropriate places
** in the HDF file.
** I have assumed that the ImageDescriptors and GraphicControls follow
** one another, ie. I have not associated them with each other. The driver
** must assume a 1-1 correspondance. The same discussion with plain text
** extension.
*/
typedef struct _GifToMem {
GIFHEAD * GifHeader;
GIFIMAGEDESC ** GifImageDesc;
GIFGRAPHICCONTROL **GifGraphicControlExtension;
GIFPLAINTEXT ** GifPlainTextExtension;
GIFAPPLICATION ** GifApplicationExtension;
GIFCOMMENT ** GifCommentExtension;
} GIFTOMEM;
/*
** Function Prototypes
*/
/* GIF2MEM.C */
int Gif2Mem(GIFBYTE *, GIFTOMEM *);
/* GIFREAD.C */
int ReadGifHeader(GIFHEAD *, GIFBYTE **);
int ReadGifImageDesc(GIFIMAGEDESC *, GIFBYTE **);
int ReadGifGraphicControl(GIFGRAPHICCONTROL *, GIFBYTE **);
int ReadGifPlainText(GIFPLAINTEXT *, GIFBYTE **);
int ReadGifApplication(GIFAPPLICATION *, GIFBYTE **);
int ReadGifComment(GIFCOMMENT *, GIFBYTE **);
/* HDFGIFWR.C */
int hdfWriteGIF(FILE *fp, GIFBYTE *pic, int ptype, int w, int h, const GIFBYTE *rmap, const GIFBYTE *gmap,
const GIFBYTE *bmap, const GIFBYTE *pc2ncmap, int numcols, int colorstyle, int BitsPerPixel);
/* WRITEHDF.C */
int WriteHDF(GIFTOMEM, GIFCHAR *);
/* Function: ReadHDF
** Return: 0 on completion without error, -1 on error
** Input: GIFCHAR *h5_file - HDF file name
** GIFCHAR *dset_name - Name of the HDF Image dataset
** GIFCHAR *pal_name - Name of the HDF palette
** Output: GIFBYTE* data - the HDF Image to be converted
** GIFBYTE palette[256][3] - the corresponding palette
** hsize_t* image_size - the size of each dimension of the image
*/
int ReadHDF(GIFBYTE **data, GIFBYTE palette[256][3], hsize_t *image_size, GIFCHAR *h5_file,
GIFCHAR *dset_name, GIFCHAR *pal_name);
GIFBYTE *Decompress(GIFIMAGEDESC *, GIFHEAD *);
GIFBYTE GetByte(const GIFBYTE *);
GIFWORD GetWord(GIFBYTE *);
void cleanup(GIFBYTE *);
#endif /* GIF_H_ */
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