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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#include "gif.h"
#include "h5tools.h"
/* just a small cleanup routine before we leave */
void
cleanup(BYTE *ptr)
{
if (ptr)
free(ptr);
}
/* 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
**
** Future Notes:
** The way readHDF works right now is that it expects the user
** to know the exact path to the HDF image. Thus it does not
** parse the HDF file looking for image datasets and corresponding
** palettes. Also it takes in the default palette for the image
** specified, if the palette is missing, it makes a default greyscale
** palette and throws it in.
**
** Modifications: Pedro Vicente Nunes, pvn@ncsa.uiuc.edu
** Date: December 15, 2005
** Changed the HDF5 read routines to use memory types and sizes,
** for both the image and pallete datasets
**
*/
int ReadHDF(BYTE** data, BYTE palette[256][3], hsize_t *image_size,
CHAR *h5_file, CHAR *dset_name, CHAR *pal_name)
{
hid_t fHfile; /* H5 file to open */
hid_t dspace; /* dataspace identifier for the the dataset */
hid_t dtype; /* datatype identifier for the the dataset */
hid_t mtype_id; /* memory data type ID */
size_t msize; /* memory size of memory type */
hid_t dset; /* dataset identifier */
hid_t pal_set; /* dataset for palette */
hid_t pal_space; /* dataspace for palette */
hid_t pal_dtype; /* datatype for palette */
hsize_t datasize; /* size of the image */
int pal_exist=0; /* do we have a palette? */
/* check stuff */
if (!h5_file || !dset_name || !image_size) {
fprintf(stderr, "NULL is not an acceptable input for HDFread. Aborting.\n");
return -1;
}
/* do we have a palette ? */
if (pal_name) {
pal_exist = 1;
}
/* try opening the file */
/* H5 file open calls */
if ((fHfile = H5Fopen(h5_file , H5F_ACC_RDONLY , H5P_DEFAULT)) < 0) {
fprintf(stderr , "Unable to open HDF file for input. Aborting.\n");
return -1;
}
/* open the dataset for reading */
if ((dset = H5Dopen(fHfile , dset_name)) < 0) {
fprintf(stderr , "Unable to open dataset\n");
return -1;
}
dtype = H5Dget_type(dset);
if (dtype < 0) {
fprintf(stderr , "Unable to open datatype\n");
return -1;
}
if (H5Tget_class(dtype) != H5T_INTEGER) {
fprintf(stderr , "Data is not integer. Cannot convert to GIF\n");
return -1;
}
if (H5Tget_size(dtype) != 1) {
fprintf(stderr , "Data is %d bytes per pixel. Cannot convert to GIF\n",(int)H5Tget_size(dtype));
return -1;
}
/* get the dataspace */
if ((dspace = H5Dget_space(dset)) < 0) {
fprintf(stderr , "Unable to get dataspace\n");
return -1;
}
/* get the dimension size of the image */
if (H5Sget_simple_extent_dims(dspace , image_size , NULL) <0 ) {
fprintf(stderr , "Unable to get dimension info\n");
return -1;
}
/* get memory type */
if ((mtype_id=h5tools_get_native_type(dtype))<0){
fprintf(stderr , "Unable to get memory type\n");
return -1;
}
/* get memory datatype size */
if ((msize=H5Tget_size(mtype_id))==0){
fprintf(stderr , "Unable to get memory size\n");
return -1;
}
/* size needed to store the image */
datasize = image_size[0] * image_size[1];
/* allocate memory to store the image */
if ((*data = (BYTE*) malloc((size_t)datasize*msize)) == NULL) {
fprintf(stderr , "Out of memory, exiting");
return -1;
}
/* get the actual image */
if (H5Dread(dset , mtype_id, H5S_ALL , H5S_ALL , H5P_DEFAULT , *data) < 0) {
fprintf(stderr , "Unable to read data \n");
cleanup(*data);
return -1;
}
if (pal_exist) {
hsize_t loc_pal_size[2];
hsize_t pal_datasize;
hid_t pal_mtype_id;
void *temp_buf;
/* get the palette dataset */
if ((pal_set = H5Dopen(fHfile , pal_name)) < 0) {
fprintf(stderr , "Unable to open dataset\n");
pal_exist = 0;
return -1;
}
pal_dtype = H5Dget_type(pal_set);
if (dtype < 0) {
fprintf(stderr , "Unable to open palette datatype\n");
return -1;
}
if (H5Tget_class(pal_dtype) != H5T_INTEGER) {
fprintf(stderr , "Palette data is not integer. Cannot convert to GIF\n");
return -1;
}
if (H5Tget_size(pal_dtype) != 1) {
fprintf(stderr , "Palette data is %d bytes per pixel. Cannot convert to GIF\n",(int)H5Tget_size(pal_dtype));
return -1;
}
/* get the dataspace */
if ((pal_space = H5Dget_space(pal_set)) < 0) {
fprintf(stderr , "Unable to get dataspace\n");
pal_exist = 0;
return -1;
}
/* get the dimension size of the palette. */
if (H5Sget_simple_extent_dims(pal_space , loc_pal_size , NULL) !=2 ) {
fprintf(stderr , "Unable to get dimension info\n");
pal_exist = 0;
return -1;
}
/* get memory type */
if ((pal_mtype_id=h5tools_get_native_type(pal_dtype))<0){
fprintf(stderr , "Unable to get memory type\n");
return -1;
}
/* get memory datatype size */
if ((msize=H5Tget_size(pal_mtype_id))==0){
fprintf(stderr , "Unable to get memory size\n");
return -1;
}
/* size needed to store the image */
pal_datasize = loc_pal_size[0] * loc_pal_size[1];
/* copy stuff into a temp buffer and then copy 256*3 elements to palette */
temp_buf=(void *) malloc((unsigned)(pal_datasize*msize));
if ( temp_buf==NULL){
printf( "cannot read into memory\n" );
return -1;
}
/*
* make sure that the palette is actually 256 X 3 so that we don't
* create overflows
*/
if (pal_datasize > 256 * 3) {
fprintf(stderr , "Palette seems to be more than 256X3 bytes\n");
fprintf(stderr , "Truncating palette to 256 colors. This might cause a problem with the final image\n");
pal_datasize = 256 * 3;
}
/* get the actual palette */
if (H5Dread(pal_set , pal_mtype_id, H5S_ALL , H5S_ALL , H5P_DEFAULT , temp_buf) < 0) {
fprintf(stderr , "Unable to read data \n");
cleanup(*data);
cleanup(temp_buf);
return -1;
}
/* copy stuff into the actual palette */
memcpy(palette , temp_buf , (size_t)pal_datasize);
/* get rid of the temp memory */
cleanup(temp_buf);
/* close pal ids */
H5Dclose(pal_set);
H5Sclose(pal_space);
H5Tclose(pal_dtype);
H5Tclose(pal_mtype_id);
/* end of if (pal_exist) */
} else {
int i;
/*
* if palette does not exist we just go ahead and create a uniform
* greyscale palette
*/
for (i = 0 ; i < 256 ; i++) {
palette[i][0] = 255 - i;
palette[i][1] = 255 - i;
palette[i][2] = 255 - i;
}
}
/* close everything */
H5Dclose(dset);
H5Sclose(dspace);
H5Tclose(dtype);
H5Tclose(mtype_id);
H5Fclose(fHfile);
return 0;
}
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