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Diffstat (limited to 'tools/gifconv')
| -rw-r--r-- | tools/gifconv/gif.h | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/tools/gifconv/gif.h b/tools/gifconv/gif.h new file mode 100644 index 0000000..f697881 --- /dev/null +++ b/tools/gifconv/gif.h @@ -0,0 +1,179 @@ +/****************************************************************************\ +** Title: GIF.H ** +** Purpose: GIF Header file ** +\****************************************************************************/ + +#ifndef GIF_H +#define GIF_H 1 + +#include <hdf5.h> + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + + +#define MAX_PAL 768 + +/*#include "datatype.h" Data type definitions */ + +/* set the name length restriction to 64 charachters */ +#define VSNAMELENMAX 64 /* this is a carryover from HDF4 */ + +/* typedef H5T_NATIVE_UINT8 BYTE; */ +typedef unsigned char BYTE; + +/* typedef H5T_NATIVE_UINT16 WORD; */ +typedef unsigned long WORD; + +typedef char CHAR; +typedef unsigned char boolean; + +#define false 0; +#define true 1; + +/* 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 */ +{ + BYTE PackedField; /* 0Ah Color Information */ + WORD TableSize; + BYTE ImageCount; /* Keep a count of the number of images */ + BYTE CommentCount; + BYTE ApplicationCount; + BYTE PlainTextCount; + BYTE HDFPalette[256][3]; + BYTE HeaderDump[6]; /* BYTE array to dump header contents */ + BYTE LSDDump[7]; /* Logical Screen Descriptor dump */ +} GIFHEAD; + + +/* +** The GIF Image Descriptor. +*/ +typedef struct _GifImageDescriptor +{ + WORD ImageWidth; /* Width of the image in pixels */ + WORD ImageHeight; /* Height of the image in pixels */ + BYTE PackedField; /* Image and Color Table Data Information */ + WORD TableSize; + WORD CodeSize; /* Minimum LZW CodeSize for image data */ + BYTE HDFPalette[256][3]; + BYTE GIDDump[9]; /* GifImageDescriptor dump */ + + BYTE *Image; /* Decompressed Raster Image */ + BYTE *GIFImage; +} GIFIMAGEDESC; + + +/* +** GIF 89a Graphic Control Extension Block +*/ +typedef struct _GifGraphicControlExtension +{ + BYTE GCEDump[5]; /* Graphic Control Extension Dump */ +} GIFGRAPHICCONTROL; + + +/* +** GIF 89a Plain Text Extension Block +*/ +typedef struct _GifPlainTextExtension +{ + BYTE PTEDump[15]; /* Plain Text Extension Dump */ + BYTE *PlainTextData; /* Plain Text data sub-blocks */ + WORD DataSize; +} GIFPLAINTEXT; + + +/* +** GIF 89a Application Extension Block +*/ +typedef struct _GifApplicationExtension +{ + BYTE AEDump[14]; /* Application Extension Dump */ + BYTE *ApplicationData; /* Application data sub-blocks */ + WORD DataSize; +} GIFAPPLICATION; + +/* +** GIF 89a Comment Extension Block +*/ +typedef struct _GifCommentExtension +{ + BYTE CEDump[2]; /* Comment Extension Dump */ + BYTE *CommentData; /* Comment data sub-blocks */ + WORD DataSize; + BYTE 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 */ +GIFTOMEM Gif2Mem(BYTE *); + +/* GIFREAD.C */ +int ReadGifHeader(GIFHEAD *, BYTE **); +int ReadGifImageDesc(GIFIMAGEDESC *, BYTE **); +int ReadGifGraphicControl(GIFGRAPHICCONTROL *, BYTE **); +int ReadGifPlainText(GIFPLAINTEXT *, BYTE **); +int ReadGifApplication(GIFAPPLICATION *, BYTE **); +int ReadGifComment(GIFCOMMENT *, BYTE **); + +/* WRITEHDF.C */ +int WriteHDF(GIFTOMEM , CHAR * , CHAR *); + +/* Function : ReadHDF +** Return: 0 on completion without error, -1 on error +** Input: CHAR *h5_file - HDF file name +** CHAR *dset_name - Name of the HDF Image dataset +** CHAR *pal_name - Name of the HDF palette +** Output : BYTE* data - the HDF Image to be converted +** BYTE palette[256][3] - the corresponding palette +** hsize_t* image_size - the size of each dimension of the image +** +*/ +int ReadHDF(BYTE** data , BYTE palette[256][3] , hsize_t *image_size , CHAR *h5_file , CHAR *dset_name , CHAR *pal_name); + +BYTE *ReadDataSubBlocks(BYTE ** , WORD *); +BYTE *Decompress (GIFIMAGEDESC * , GIFHEAD *); +BYTE GetByte(BYTE *); +WORD GetWord(BYTE *); + +void cleanup(BYTE*); +#endif /* GIF_H */ + |