[svn-r3919]

Purpose:
    Adding new feature
Description:
    Added gif2h5 and h52gif conversion utilities
Solution:
    The utilites follow the framework built for the gif2hdf and hdf2gif
    utilities for hdf4. The main files modified were those that read the
    H5 file and those that write H5 file. In the future, if you wish to
    continue with the framework and extend it to .png or some other fileformat
    the main files to edit will be the gif reader and writer.
    One point to note with h52gif. You have to specify the exact location of
    the image and the palette that it links to. You can choose not to specify
    a palette (uniform grayscale chosen in this case) but you must specify
    image location. In the future, someone could edit the readhdf.c source
    to enable the reader to parse the hdf file and select all images with
    corresponding palettes.
Platforms tested:
    modi4 , eirene , hawkwind , arabica , Ren (NT 4.0) , Personal box (win2k)

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 */
+