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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. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#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 = NULL; /* 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 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 */
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 */
H5IMmake_palette(file_id, PAL_NAME, pal_dims, pal);
/* attach the palette to the image */
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 */
H5IMmake_image_24bit(file_id, IMAGE2_NAME, width, height, "INTERLACE_PIXEL", gbuf);
/* close the file. */
H5Fclose(file_id);
if (gbuf) {
free(gbuf);
gbuf = NULL;
}
return 0;
out:
printf("Error on return function...Exiting\n");
if (gbuf) {
free(gbuf);
gbuf = NULL;
}
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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