/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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 "H5IMprivate.h"
#include "H5LTprivate.h"
#include <string.h>
#include <stdlib.h>
/*-------------------------------------------------------------------------
* Function: H5IMmake_image_8bit
*
* Purpose: Creates and writes an image an 8 bit image
*
* Return: Success: 0, Failure: -1
*
* Programmer: Pedro Vicente Nunes, pvn@ncsa.uiuc.edu
*
* Date: June 13, 2001
*
* Comments:
* based on HDF5 Image and Palette Specification
* http://hdf.ncsa.uiuc.edu/HDF5/H5Image/ImageSpec.html
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t H5IMmake_image_8bit( hid_t loc_id,
const char *dset_name,
hsize_t width,
hsize_t height,
const unsigned char *buf )
{
hsize_t dims[IMAGE8_RANK];
/* Initialize the image dimensions */
dims[0] = height;
dims[1] = width;
/* Make the dataset */
if ( H5LTmake_dataset( loc_id, dset_name, IMAGE8_RANK, dims, H5T_NATIVE_UCHAR, buf ) < 0)
return -1;
/* Attach the CLASS attribute */
if ( H5LTset_attribute_string( loc_id, dset_name, "CLASS", IMAGE_CLASS ) < 0)
return -1;
/* Attach the VERSION attribute */
if ( H5LTset_attribute_string( loc_id, dset_name, "IMAGE_VERSION", IMAGE_VERSION ) < 0)
return -1;
/* Attach the IMAGE_SUBCLASS attribute */
if ( H5LTset_attribute_string( loc_id, dset_name, "IMAGE_SUBCLASS", "IMAGE_INDEXED" ) < 0)
return -1;
return 0;
}
/*-------------------------------------------------------------------------
* Function: H5IMmake_image_24bit
*
* Purpose:
*
* Return: Success: 0, Failure: -1
*
* Programmer: Pedro Vicente Nunes, pvn@ncsa.uiuc.edu
*
* Date: June 13, 2001
*
* Comments:
* based on HDF5 Image and Palette Specification
* http://hdf.ncsa.uiuc.edu/HDF5/H5Image/ImageSpec.html
*
* Interlace Mode Dimensions in the Dataspace
* INTERLACE_PIXEL [height][width][pixel components]
* INTERLACE_PLANE [pixel components][height][width]
*
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t H5IMmake_image_24bit( hid_t loc_id,
const char *dset_name,
hsize_t width,
hsize_t height,
const char *interlace,
const unsigned char *buf )
{
hsize_t dims[IMAGE24_RANK];
/* Initialize the image dimensions */
if ( strcmp( interlace, "INTERLACE_PIXEL" ) == 0 )
{
/* Number of color planes is defined as the third dimension */
dims[0] = height;
dims[1] = width;
dims[2] = IMAGE24_RANK;
}
else
if ( strcmp( interlace, "INTERLACE_PLANE" ) == 0 )
{
/* Number of color planes is defined as the first dimension */
dims[0] = IMAGE24_RANK;
dims[1] = height;
dims[2] = width;
}
else return -1;
/* Make the dataset */
if ( H5LTmake_dataset( loc_id, dset_name, IMAGE24_RANK, dims, H5T_NATIVE_UCHAR, buf ) < 0)
return -1;
/* Attach the CLASS attribute */
if ( H5LTset_attribute_string( loc_id, dset_name, "CLASS", IMAGE_CLASS ) < 0)
return -1;
/* Attach the VERSION attribute */
if ( H5LTset_attribute_string( loc_id, dset_name, "IMAGE_VERSION", IMAGE_VERSION ) < 0)
return -1;
/* Attach the IMAGE_SUBCLASS attribute */
if ( H5LTset_attribute_string( loc_id, dset_name, "IMAGE_SUBCLASS", "IMAGE_TRUECOLOR" ) < 0)
return -1;
/* Attach the INTERLACE_MODE attribute. This attributes is only for true color images */
if ( H5LTset_attribute_string( loc_id, dset_name, "INTERLACE_MODE", interlace ) < 0)
return -1;
return 0;
}
/*-------------------------------------------------------------------------
* Function: find_palette
*
* Purpose: operator function used by H5LT_find_palette
*
* Return:
*
* Programmer: Pedro Vicente Nunes, pvn@ncsa.uiuc.edu
*
* Date: May 28, 2001
*
* Comments:
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t find_palette(hid_t loc_id,
const char *name,
const H5A_info_t *ainfo,
void *op_data)
{
int ret = H5_ITER_CONT;
/* Shut compiler up */
loc_id = loc_id; ainfo = ainfo; op_data = op_data;
/* Define a positive value for return value if the attribute was found. This will
* cause the iterator to immediately return that positive value,
* indicating short-circuit success
*/
if(strcmp(name, "PALETTE") == 0)
ret = H5_ITER_STOP;
return ret;
}
/*-------------------------------------------------------------------------
* Function: H5IM_find_palette
*
* Purpose: Private function. Find the attribute "PALETTE" in the image dataset
*
* Return: Success: 1, Failure: 0
*
* Programmer: Pedro Vicente Nunes, pvn@ncsa.uiuc.edu
*
* Date: May 11, 2001
*
* Comments:
* The function uses H5Aiterate2 with the operator function find_palette
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t H5IM_find_palette( hid_t loc_id )
{
return H5Aiterate2(loc_id, H5_INDEX_NAME, H5_ITER_INC, NULL, find_palette, NULL);
}
/*-------------------------------------------------------------------------
* Function: H5IMget_image_info
*
* Purpose: Gets information about an image dataset (dimensions, interlace mode
* and number of associated palettes).
*
* Return: Success: 0, Failure: -1
*
* Programmer: Pedro Vicente Nunes, pvn@ncsa.uiuc.edu
*
* Date: July 25, 2001
*
* Comments:
* based on HDF5 Image and Palette Specification
* http://hdf.ncsa.uiuc.edu/HDF5/H5Image/ImageSpec.html
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t H5IMget_image_info( hid_t loc_id,
const char *dset_name,
hsize_t *width,
hsize_t *height,
hsize_t *planes,
char *interlace,
hssize_t *npals )
{
hid_t did;
hid_t sid;
hsize_t dims[IMAGE24_RANK];
hid_t aid;
hid_t asid;
hid_t atid;
H5T_class_t aclass;
int has_pal;
int has_attr;
/*assume initially we have no palettes attached*/
*npals = 0;
/* Open the dataset. */
if((did = H5Dopen2(loc_id, dset_name, H5P_DEFAULT)) < 0)
return -1;
/* Try to find the attribute "INTERLACE_MODE" on the >>image<< dataset */
has_attr = H5LT_find_attribute(did, "INTERLACE_MODE");
/* It exists, get it */
if(has_attr == 1)
{
if((aid = H5Aopen(did, "INTERLACE_MODE", H5P_DEFAULT)) < 0)
goto out;
if((atid = H5Aget_type(aid)) < 0)
goto out;
if(H5Aread(aid, atid, interlace) < 0)
goto out;
if(H5Tclose(atid) < 0)
goto out;
if(H5Aclose(aid) < 0)
goto out;
}
/* Get the dataspace handle */
if ( (sid = H5Dget_space( did )) < 0)
goto out;
/* Get dimensions */
if ( H5Sget_simple_extent_dims( sid, dims, NULL) < 0)
goto out;
/* Initialize the image dimensions */
if ( has_attr == 1 )
/* This is a 24 bit image */
{
if ( strcmp( interlace, "INTERLACE_PIXEL" ) == 0 )
{
/* Number of color planes is defined as the third dimension */
*height = dims[0];
*width = dims[1];
*planes = dims[2];
}
else
if ( strcmp( interlace, "INTERLACE_PLANE" ) == 0 )
{
/* Number of color planes is defined as the first dimension */
*planes = dims[0];
*height = dims[1];
*width = dims[2];
}
else return -1;
}
else
/* This is a 8 bit image */
{
*height = dims[0];
*width = dims[1];
*planes = 1;
}
/* Close */
if ( H5Sclose( sid ) < 0)
goto out;
/* Get number of palettes */
/* Try to find the attribute "PALETTE" on the >>image<< dataset */
has_pal = H5IM_find_palette(did);
if(has_pal == 1)
{
if((aid = H5Aopen(did, "PALETTE", H5P_DEFAULT)) < 0)
goto out;
if((atid = H5Aget_type(aid)) < 0)
goto out;
if((aclass = H5Tget_class(atid)) < 0)
goto out;
/* Check if it is really a reference */
if(aclass == H5T_REFERENCE)
{
/* Get the reference(s) */
if ( (asid = H5Aget_space( aid )) < 0)
goto out;
*npals = H5Sget_simple_extent_npoints( asid );
if ( H5Sclose( asid ) < 0)
goto out;
} /* H5T_REFERENCE */
if ( H5Tclose( atid ) < 0)
goto out;
/* Close the attribute. */
if ( H5Aclose( aid ) < 0)
goto out;
}
/* End access to the dataset and release resources used by it. */
if ( H5Dclose( did ) < 0)
goto out;
return 0;
out:
H5Dclose( did );
H5Aclose( aid );
H5Sclose( asid );
H5Tclose( atid );
return -1;
}
/*-------------------------------------------------------------------------
* Function: H5IMread_image
*
* Purpose: Reads image data from disk.
*
* Return: Success: 0, Failure: -1
*
* Programmer: Pedro Vicente Nunes, pvn@ncsa.uiuc.edu
*
* Date: June 13, 2001
*
* Comments:
* based on HDF5 Image and Palette Specification
* http://hdf.ncsa.uiuc.edu/HDF5/H5Image/ImageSpec.html
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t H5IMread_image( hid_t loc_id,
const char *dset_name,
unsigned char *buf )
{
hid_t did;
/* Open the dataset. */
if((did = H5Dopen2(loc_id, dset_name, H5P_DEFAULT)) < 0)
return -1;
/* Read */
if ( H5Dread( did, H5T_NATIVE_UCHAR, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf ) < 0)
goto out;
/* End access to the dataset and release resources used by it. */
if ( H5Dclose( did ) )
return -1;
return 0;
out:
H5Dclose( did );
return -1;
}
/*-------------------------------------------------------------------------
* Function: H5IMmake_palette
*
* Purpose: Creates and writes a palette.
*
* Return: Success: 0, Failure: -1
*
* Programmer: Pedro Vicente Nunes, pvn@ncsa.uiuc.edu
*
* Date: May 01, 2001
*
* Comments:
* based on HDF5 Image and Palette Specification
* http://hdf.ncsa.uiuc.edu/HDF5/H5Image/ImageSpec.html
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t H5IMmake_palette( hid_t loc_id,
const char *pal_name,
const hsize_t *pal_dims,
const unsigned char *pal_data )
{
int has_pal;
/* Check if the dataset already exists */
has_pal = H5LTfind_dataset( loc_id, pal_name );
/* It exists. Return */
if ( has_pal == 1 )
return 0;
/* Make the palette dataset. */
if ( H5LTmake_dataset( loc_id, pal_name, 2, pal_dims, H5T_NATIVE_UCHAR, pal_data ) < 0 )
return -1;
/* Attach the attribute "CLASS" to the >>palette<< dataset*/
if ( H5LTset_attribute_string( loc_id, pal_name, "CLASS", PALETTE_CLASS ) < 0)
return -1;
/* Attach the attribute "PAL_VERSION" to the >>palette<< dataset*/
if ( H5LTset_attribute_string( loc_id, pal_name, "PAL_VERSION", "1.2" ) < 0)
return -1;
return 0;
}
/*-------------------------------------------------------------------------
* Function: H5IMlink_palette
*
* Purpose: This function attaches a palette to an existing image dataset
*
* Return: Success: 0, Failure: -1
*
* Programmer: Pedro Vicente Nunes, pvn@ncsa.uiuc.edu
*
* Date: May 01, 2001
*
* Comments:
* based on HDF5 Image and Palette Specification
* http://hdf.ncsa.uiuc.edu/HDF5/H5Image/ImageSpec.html
*
* An image (dataset) within an HDF5 file may optionally specify an array of
* palettes to be viewed with. The dataset will have an attribute
* which contains an array of object reference pointers which refer to palettes in the file.
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t H5IMlink_palette( hid_t loc_id,
const char *image_name,
const char *pal_name )
{
hid_t did;
hid_t atid=-1;
hid_t aid=-1;
hid_t asid=-1;
hobj_ref_t ref; /* write a new reference */
hobj_ref_t *refbuf; /* buffer to read references */
hssize_t n_refs;
hsize_t dim_ref;
int ok_pal;
/* The image dataset may or may not have the attribute "PALETTE"
* First we try to open to see if it is already there; if not, it is created.
* If it exists, the array of references is extended to hold the reference
* to the new palette
*/
/* First we get the image id */
if((did = H5Dopen2(loc_id, image_name, H5P_DEFAULT)) < 0)
return -1;
/* Try to find the attribute "PALETTE" on the >>image<< dataset */
ok_pal = H5LT_find_attribute( did, "PALETTE" );
/*-------------------------------------------------------------------------
* It does not exist. We create the attribute and one reference
*-------------------------------------------------------------------------
*/
if(ok_pal == 0 )
{
if((asid = H5Screate(H5S_SCALAR)) < 0)
goto out;
/* Create the attribute type for the reference */
if((atid = H5Tcopy(H5T_STD_REF_OBJ)) < 0)
goto out;
/* Create the attribute "PALETTE" to be attached to the image*/
if((aid = H5Acreate2(did, "PALETTE", atid, asid, H5P_DEFAULT, H5P_DEFAULT)) < 0)
goto out;
/* Create a reference. The reference is created on the local id. */
if(H5Rcreate(&ref, loc_id, pal_name, H5R_OBJECT, -1) < 0)
goto out;
/* Write the attribute with the reference */
if(H5Awrite(aid, atid, &ref) < 0)
goto out;
/* close */
if(H5Sclose(asid) < 0)
goto out;
if ( H5Tclose( atid ) < 0)
goto out;
if(H5Aclose(aid) < 0)
goto out;
}
/*-------------------------------------------------------------------------
* The attribute already exists, open it
*-------------------------------------------------------------------------
*/
else if(ok_pal == 1)
{
if((aid = H5Aopen(did, "PALETTE", H5P_DEFAULT)) < 0)
goto out;
if((atid = H5Aget_type(aid)) < 0)
goto out;
if(H5Tget_class(atid) < 0)
goto out;
/* Get and save the old reference(s) */
if((asid = H5Aget_space(aid)) < 0)
goto out;
n_refs = H5Sget_simple_extent_npoints(asid);
dim_ref = n_refs + 1;
refbuf = (hobj_ref_t*)malloc( sizeof(hobj_ref_t) * (int)dim_ref );
if ( H5Aread( aid, atid, refbuf ) < 0)
goto out;
/* The attribute must be deleted, in order to the new one can reflect the changes*/
if(H5Adelete(did, "PALETTE") < 0)
goto out;
/* Create a new reference for this palette. */
if ( H5Rcreate( &ref, loc_id, pal_name, H5R_OBJECT, -1 ) < 0)
goto out;
refbuf[n_refs] = ref;
/* Create the data space for the new references */
if(H5Sclose(asid) < 0)
goto out;
if((asid = H5Screate_simple(1, &dim_ref, NULL)) < 0)
goto out;
/* Create the attribute again with the changes of space */
if(H5Aclose(aid) < 0)
goto out;
if((aid = H5Acreate2(did, "PALETTE", atid, asid, H5P_DEFAULT, H5P_DEFAULT)) < 0)
goto out;
/* Write the attribute with the new references */
if(H5Awrite(aid, atid, refbuf) < 0)
goto out;
/* close */
if(H5Sclose(asid) < 0)
goto out;
if(H5Aclose(aid) < 0)
goto out;
free( refbuf );
} /* ok_pal == 1 */
/* Close the image dataset. */
if ( H5Dclose( did ) < 0)
return -1;
return 0;
out:
H5Dclose( did );
H5Sclose( asid );
H5Tclose( atid );
H5Aclose( aid );
return -1;
}
/*-------------------------------------------------------------------------
* Function: H5IMunlink_palette
*
* Purpose: This function dettaches a palette from an existing image dataset
*
* Return: Success: 0, Failure: -1
*
* Programmer: Pedro Vicente Nunes, pvn@ncsa.uiuc.edu
*
* Date: September 10, 2001
*
* Comments:
* based on HDF5 Image and Palette Specification
* http://hdf.ncsa.uiuc.edu/HDF5/H5Image/ImageSpec.html
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t H5IMunlink_palette( hid_t loc_id,
const char *image_name,
const char *pal_name )
{
hid_t did;
hid_t atid;
hid_t aid;
H5T_class_t aclass;
int ok_pal, has_pal;
/* Try to find the palette dataset */
has_pal = H5LTfind_dataset( loc_id, pal_name );
/* It does not exist. Return */
if ( has_pal == 0 )
return -1;
/* The image dataset may or not have the attribute "PALETTE"
* First we try to open to see if it is already there; if not, it is created.
* If it exists, the array of references is extended to hold the reference
* to the new palette
*/
/* First we get the image id */
if((did = H5Dopen2(loc_id, image_name, H5P_DEFAULT)) < 0)
return -1;
/* Try to find the attribute "PALETTE" on the >>image<< dataset */
ok_pal = H5LT_find_attribute(did, "PALETTE");
/* It does not exist. Nothing to do */
if(ok_pal == 0)
return -1;
/* The attribute exists, open it */
else if(ok_pal == 1)
{
if((aid = H5Aopen(did, "PALETTE", H5P_DEFAULT)) < 0)
goto out;
if((atid = H5Aget_type(aid)) < 0)
goto out;
if((aclass = H5Tget_class(atid)) < 0)
goto out;
/* Check if it is really a reference */
if(aclass == H5T_REFERENCE)
{
/* Delete the attribute */
if(H5Adelete(did, "PALETTE") < 0)
goto out;
} /* H5T_REFERENCE */
if(H5Tclose(atid) < 0)
goto out;
/* Close the attribute. */
if(H5Aclose(aid) < 0)
goto out;
} /* ok_pal */
/* Close the image dataset. */
if(H5Dclose(did) < 0)
return -1;
return 0;
out:
H5Dclose( did );
return -1;
}
/*-------------------------------------------------------------------------
* Function: H5IMget_npalettes
*
* Purpose: Gets the number of palettes associated to an image
*
* Return: Success: 0, Failure: -1
*
* Programmer: Pedro Vicente Nunes, pvn@ncsa.uiuc.edu
*
* Date: July 22, 2001
*
* Comments:
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t H5IMget_npalettes( hid_t loc_id,
const char *image_name,
hssize_t *npals )
{
hid_t did;
hid_t atid;
hid_t aid;
hid_t asid;
H5T_class_t aclass;
int has_pal;
/*assume initially we have no palettes attached*/
*npals = 0;
/* Open the dataset. */
if((did = H5Dopen2(loc_id, image_name, H5P_DEFAULT)) < 0)
return -1;
/* Try to find the attribute "PALETTE" on the >>image<< dataset */
has_pal = H5IM_find_palette(did);
if(has_pal == 1 )
{
if((aid = H5Aopen(did, "PALETTE", H5P_DEFAULT)) < 0)
goto out;
if((atid = H5Aget_type(aid)) < 0)
goto out;
if((aclass = H5Tget_class(atid)) < 0)
goto out;
/* Check if it is really a reference */
if(aclass == H5T_REFERENCE)
{
if((asid = H5Aget_space(aid)) < 0)
goto out;
*npals = H5Sget_simple_extent_npoints( asid );
if ( H5Sclose( asid ) < 0)
goto out;
} /* H5T_REFERENCE */
if ( H5Tclose( atid ) < 0)
goto out;
/* Close the attribute. */
if ( H5Aclose( aid ) < 0)
goto out;
}
/* Close the image dataset. */
if ( H5Dclose( did ) < 0)
return -1;
return 0;
out:
H5Dclose( did );
return -1;
}
/*-------------------------------------------------------------------------
* Function: H5IMget_palette_info
*
* Purpose: Get palette information
*
* Return: Success: 0, Failure: -1
*
* Programmer: Pedro Vicente Nunes, pvn@ncsa.uiuc.edu
*
* Date: July 22, 2001
*
* Comments:
* based on HDF5 Image and Palette Specification
* http://hdf.ncsa.uiuc.edu/HDF5/H5Image/ImageSpec.html
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t H5IMget_palette_info( hid_t loc_id,
const char *image_name,
int pal_number,
hsize_t *pal_dims )
{
hid_t did;
int has_pal;
hid_t atid=-1;
hid_t aid;
hid_t asid=-1;
hssize_t n_refs;
hsize_t dim_ref;
hobj_ref_t *refbuf; /* buffer to read references */
hid_t pal_id;
hid_t pal_space_id;
hsize_t pal_maxdims[2];
/* Open the dataset. */
if((did = H5Dopen2(loc_id, image_name, H5P_DEFAULT)) < 0)
return -1;
/* Try to find the attribute "PALETTE" on the >>image<< dataset */
has_pal = H5IM_find_palette(did);
if(has_pal == 1)
{
if((aid = H5Aopen(did, "PALETTE", H5P_DEFAULT)) < 0)
goto out;
if((atid = H5Aget_type(aid)) < 0)
goto out;
if(H5Tget_class(atid) < 0)
goto out;
/* Get the reference(s) */
if((asid = H5Aget_space(aid)) < 0)
goto out;
n_refs = H5Sget_simple_extent_npoints(asid);
dim_ref = n_refs;
refbuf = (hobj_ref_t*)malloc( sizeof(hobj_ref_t) * (int)dim_ref );
if ( H5Aread( aid, atid, refbuf ) < 0)
goto out;
/* Get the actual palette */
if ( (pal_id = H5Rdereference( did, H5R_OBJECT, &refbuf[pal_number] )) < 0)
goto out;
if ( (pal_space_id = H5Dget_space( pal_id )) < 0)
goto out;
if ( H5Sget_simple_extent_ndims( pal_space_id ) < 0)
goto out;
if ( H5Sget_simple_extent_dims( pal_space_id, pal_dims, pal_maxdims ) < 0)
goto out;
/* close */
if (H5Dclose(pal_id)<0)
goto out;
if ( H5Sclose( pal_space_id ) < 0)
goto out;
if ( H5Sclose( asid ) < 0)
goto out;
if ( H5Tclose( atid ) < 0)
goto out;
if ( H5Aclose( aid ) < 0)
goto out;
free( refbuf );
}
/* Close the image dataset. */
if ( H5Dclose( did ) < 0)
return -1;
return 0;
out:
H5Dclose( did );
H5Sclose( asid );
H5Tclose( atid );
H5Aclose( aid );
return -1;
}
/*-------------------------------------------------------------------------
* Function: H5IMget_palette
*
* Purpose: Read palette
*
* Return: Success: 0, Failure: -1
*
* Programmer: Pedro Vicente Nunes, pvn@ncsa.uiuc.edu
*
* Date: August 30, 2001
*
* Comments:
* based on HDF5 Image and Palette Specification
* http://hdf.ncsa.uiuc.edu/HDF5/H5Image/ImageSpec.html
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t H5IMget_palette( hid_t loc_id,
const char *image_name,
int pal_number,
unsigned char *pal_data )
{
hid_t did;
int has_pal;
hid_t atid=-1;
hid_t aid;
hid_t asid=-1;
hssize_t n_refs;
hsize_t dim_ref;
hobj_ref_t *refbuf; /* buffer to read references */
hid_t pal_id;
/* Open the dataset. */
if((did = H5Dopen2(loc_id, image_name, H5P_DEFAULT)) < 0)
return -1;
/* Try to find the attribute "PALETTE" on the >>image<< dataset */
has_pal = H5IM_find_palette(did);
if(has_pal == 1 )
{
if((aid = H5Aopen(did, "PALETTE", H5P_DEFAULT)) < 0)
goto out;
if((atid = H5Aget_type(aid)) < 0)
goto out;
if(H5Tget_class(atid) < 0)
goto out;
/* Get the reference(s) */
if((asid = H5Aget_space(aid)) < 0)
goto out;
n_refs = H5Sget_simple_extent_npoints(asid);
dim_ref = n_refs;
refbuf = (hobj_ref_t*)malloc( sizeof(hobj_ref_t) * (int)dim_ref );
if ( H5Aread( aid, atid, refbuf ) < 0)
goto out;
/* Get the palette id */
if ( (pal_id = H5Rdereference( did, H5R_OBJECT, &refbuf[pal_number] )) < 0)
goto out;
/* Read the palette dataset */
if ( H5Dread( pal_id, H5Dget_type(pal_id), H5S_ALL, H5S_ALL, H5P_DEFAULT, pal_data ) < 0)
goto out;
/* close */
if (H5Dclose(pal_id)<0)
goto out;
if ( H5Sclose( asid ) < 0)
goto out;
if ( H5Tclose( atid ) < 0)
goto out;
if ( H5Aclose( aid ) < 0)
goto out;
free( refbuf );
}
/* Close the image dataset. */
if ( H5Dclose( did ) < 0)
return -1;
return 0;
out:
H5Dclose( did );
H5Sclose( asid );
H5Tclose( atid );
H5Aclose( aid );
return -1;
}
/*-------------------------------------------------------------------------
* Function: H5IMis_image
*
* Purpose:
*
* Return: true, false, fail
*
* Programmer: Pedro Vicente Nunes, pvn@ncsa.uiuc.edu
*
* Date: August 30, 2001
*
* Comments:
* based on HDF5 Image and Palette Specification
* http://hdf.ncsa.uiuc.edu/HDF5/H5Image/ImageSpec.html
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t H5IMis_image( hid_t loc_id,
const char *dset_name )
{
hid_t did;
int has_class;
hid_t atid;
hid_t aid;
char attr_data[20];
herr_t ret;
/* Assume initially fail condition */
ret = -1;
/* Open the dataset. */
if((did = H5Dopen2(loc_id, dset_name, H5P_DEFAULT)) < 0)
return -1;
/* Try to find the attribute "CLASS" on the dataset */
has_class = H5LT_find_attribute(did, "CLASS");
if(has_class == 0)
{
H5Dclose(did);
return 0;
}
else if(has_class == 1)
{
if((aid = H5Aopen(did, "CLASS", H5P_DEFAULT)) < 0)
goto out;
if((atid = H5Aget_type(aid)) < 0)
goto out;
if(H5Tget_class(atid) < 0)
goto out;
if(H5Aread(aid, atid, attr_data) < 0)
goto out;
if(strcmp(attr_data, IMAGE_CLASS) == 0)
ret = 1;
else
ret = 0;
if ( H5Tclose( atid ) < 0)
goto out;
if ( H5Aclose( aid ) < 0)
goto out;
}
/* Close the dataset. */
if ( H5Dclose( did ) < 0)
return -1;
return ret;
out:
H5Dclose( did );
return -1;
}
/*-------------------------------------------------------------------------
* Function: H5IMis_palette
*
* Purpose:
*
* Return: true, false, fail
*
* Programmer: Pedro Vicente Nunes, pvn@ncsa.uiuc.edu
*
* Date: August 30, 2001
*
* Comments:
* based on HDF5 Image and Palette Specification
* http://hdf.ncsa.uiuc.edu/HDF5/H5Image/ImageSpec.html
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t H5IMis_palette( hid_t loc_id,
const char *dset_name )
{
hid_t did;
int has_class;
hid_t atid;
hid_t aid;
char attr_data[20];
herr_t ret;
/* Assume initially fail condition */
ret = -1;
/* Open the dataset. */
if((did = H5Dopen2(loc_id, dset_name, H5P_DEFAULT)) < 0)
return -1;
/* Try to find the attribute "CLASS" on the dataset */
has_class = H5LT_find_attribute(did, "CLASS");
if(has_class == 0)
{
H5Dclose( did );
return 0;
}
else if(has_class == 1)
{
if((aid = H5Aopen(did, "CLASS", H5P_DEFAULT)) < 0)
goto out;
if((atid = H5Aget_type(aid)) < 0)
goto out;
if(H5Tget_class(atid) < 0)
goto out;
if(H5Aread(aid, atid, attr_data) < 0)
goto out;
if(strcmp(attr_data, PALETTE_CLASS) == 0)
ret = 1;
else
ret = 0;
if ( H5Tclose( atid ) < 0)
goto out;
if ( H5Aclose( aid ) < 0)
goto out;
}
/* Close the dataset. */
if ( H5Dclose( did ) < 0)
return -1;
return ret;
out:
H5Dclose( did );
return -1;
}