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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 files COPYING and Copyright.html. COPYING can be found at the root *
* of the source code distribution tree; Copyright.html can be found at the *
* root level of an installed copy of the electronic HDF5 document set and *
* is linked from the top-level documents page. It can also be found at *
* http://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#include "hdf5.h"
#include "hdf5_hl.h"
#include <stdlib.h>
#include <string.h>
#define DATA_FILE1 "image8.txt"
#define DATA_FILE2 "image24pixel.txt"
#define IMAGE1_NAME "image8bit"
#define IMAGE2_NAME "image24bitpixel"
#define PAL_NAME "palette"
#define PAL_ENTRIES 256
static int read_data(const char* file_name, hsize_t *width, hsize_t *height );
unsigned char *gbuf = 0; /* global buffer for image data */
int main( void )
{
hid_t file_id; /* HDF5 file identifier */
hsize_t width; /* width of image */
hsize_t height; /* height of image */
unsigned char pal[ PAL_ENTRIES * 3 ]; /* palette array */
hsize_t pal_dims[2] = {PAL_ENTRIES,3}; /* palette dimensions */
herr_t status, i, n;
/* create a new HDF5 file using default properties. */
file_id = H5Fcreate( "ex_image2.h5", H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT );
/* read first data file */
if (read_data(DATA_FILE1,&width,&height)<0)
goto out;
/* make the image */
status=H5IMmake_image_8bit( file_id, IMAGE1_NAME, width, height, gbuf );
if (gbuf) {
free(gbuf);
gbuf = NULL;
}
/*-------------------------------------------------------------------------
* define a palette, blue to red tones
*-------------------------------------------------------------------------
*/
for ( i=0, n=0; i<PAL_ENTRIES*3; i+=3, n++)
{
pal[i] =n; /* red */
pal[i+1]=0; /* green */
pal[i+2]=255-n; /* blue */
}
/* make a palette */
status=H5IMmake_palette( file_id, PAL_NAME, pal_dims, pal );
/* attach the palette to the image */
status=H5IMlink_palette( file_id, IMAGE1_NAME, PAL_NAME );
/*-------------------------------------------------------------------------
* True color image example with pixel interlace
*-------------------------------------------------------------------------
*/
/* read second data file */
if (read_data(DATA_FILE2,&width,&height)<0)
goto out;
/* make dataset */
status=H5IMmake_image_24bit( file_id, IMAGE2_NAME, width, height, "INTERLACE_PIXEL", gbuf );
if (gbuf) {
free(gbuf);
gbuf = NULL;
}
/* close the file. */
H5Fclose( file_id );
return 0;
out:
printf("Error on return function...Exiting\n");
return 1;
}
/*-------------------------------------------------------------------------
* read_data
* utility function to read ASCII image data
* the files have a header of the type
*
* components
* n
* height
* n
* width
* n
*
* followed by the image data
*
*-------------------------------------------------------------------------
*/
static int read_data( const char* fname, /*IN*/
hsize_t *width, /*OUT*/
hsize_t *height /*OUT*/ )
{
int i, n;
int color_planes;
char str[20];
FILE *f;
int w, h;
char *srcdir = getenv("srcdir"); /* the source directory */
char data_file[512]=""; /* buffer to hold name of existing data file */
/*-------------------------------------------------------------------------
* compose the name of the file to open, using "srcdir", if appropriate
*-------------------------------------------------------------------------
*/
strcpy(data_file, "");
if (srcdir)
{
strcpy(data_file, srcdir);
strcat(data_file, "/");
}
strcat(data_file,fname);
/*-------------------------------------------------------------------------
* read
*-------------------------------------------------------------------------
*/
f = fopen(data_file, "r");
if ( f == NULL )
{
printf( "Could not open file %s. Try set $srcdir \n", data_file );
return -1;
}
fscanf( f, "%s", str );
fscanf( f, "%d", &color_planes );
fscanf( f, "%s", str );
fscanf( f, "%d", &h);
fscanf( f, "%s", str );
fscanf( f, "%d", &w);
*width = (hsize_t)w;
*height = (hsize_t)h;
if ( gbuf )
{
free( gbuf );
gbuf=NULL;
}
gbuf = (unsigned char*) malloc (w * h * color_planes * sizeof( unsigned char ));
for (i = 0; i < h * w * color_planes ; i++)
{
fscanf( f, "%d",&n );
gbuf[i] = (unsigned char)n;
}
fclose(f);
return 1;
}
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