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-rwxr-xr-xsrc/H5IMpalette.c291
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diff --git a/src/H5IMpalette.c b/src/H5IMpalette.c
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-/****************************************************************************
- * NCSA HDF *
- * Scientific Data Technologies *
- * National Center for Supercomputing Applications *
- * University of Illinois at Urbana-Champaign *
- * 605 E. Springfield, Champaign IL 61820 *
- * *
- * For conditions of distribution and use, see the accompanying *
- * hdf/COPYING file. *
- * *
- ****************************************************************************/
-
-#include "H5IMpalette.h"
-#include "H5Iprivate.h"
-#include "H5Pprivate.h"
-
-
-/*local operator function */
-static herr_t find_palette( hid_t UNUSED loc_id, const char *name, void *op_data);
-/*private function */
-herr_t H5IM_find_palette( hid_t loc_id );
-
-
-/*-------------------------------------------------------------------------
- * Function: H5IMattach_palette
- *
- * Purpose: This function attaches a palette to an existing image dataset
- *
- * Return: Success: 0, Failure: -1
- *
- * Programmer: Pedro Vicente, 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 H5IMattach_palette( hid_t loc_id,
- const char *image_name,
- const char *pal_name,
- const hsize_t *pal_dims,
- hid_t plist_id,
- const void *pal_data )
-
-{
-
- hid_t image_id;
- hid_t attr_type;
- hid_t attr_id;
- hid_t attr_space_id;
- herr_t status;
- hid_t attr_class;
- 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;
- const H5IM_paletteinfo_t *info;
-
- /* First we get some information about the palette */
-
- /* Default palette */
-
- if ( plist_id == H5IM_STDPALETTE )
- {
- info = &H5IM_create_dfltpalette;
- }
-
- /* User defined palette */
-
- else
- {
-
- /* Check valid plist, get it */
- if ( H5P_get_class(plist_id) != H5P_PALETTE ||
- NULL == ( info = H5I_object(plist_id)))
- {
- return FAIL;
- }
-
-
- }
-
-
-/* First we create the palette dataset and attach to it the required attributes
- * that identify it as a palette
- */
-
- /* Make the palette dataset. The palette is created on the same local id. */
- status = H5Lmake_dataset( loc_id, pal_name, 2, pal_dims, H5T_NATIVE_UCHAR, H5T_NATIVE_UCHAR, pal_data );
-
- /* Attach the attribute "CLASS" to the >>palette<< dataset*/
- status = H5Lattach_attribute( loc_id, pal_name, "CLASS", "PALETTE" );
-
- /* Attach the attribute "PAL_VERSION" to the >>palette<< dataset*/
- status = H5Lattach_attribute( loc_id, pal_name, "PAL_VERSION", "1.2" );
-
- /* Attach the attribute "PAL_COLORMODEL" to the >>palette<< dataset*/
- status = H5Lattach_attribute( loc_id, pal_name, "PAL_COLORMODEL", info->color_model );
-
- /* Attach the attribute "PAL_TYPE" to the >>palette<< dataset*/
- status = H5Lattach_attribute( loc_id, pal_name, "PAL_TYPE", info->type );
-
- /* Attach the PAL_MINMAXNUMERIC attribute */
- status = H5Lattach_attribute_numerical( loc_id, pal_name, "PAL_MINMAXNUMERIC", 2, H5T_NATIVE_INT, (void*)&info->minmax );
-
- /* 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 wet the image id */
- image_id = H5Dopen( loc_id, image_name );
-
- /* Try to find the attribute "PALETTE" on the >>image<< dataset */
- ok_pal = H5IM_find_palette( image_id );
-
- /* It does not exist. We create the attribute and one reference */
- if ( ok_pal <= 0 )
- {
-
- attr_space_id = H5Screate( H5S_SCALAR );
-
- /* Create the attribute type for the reference */
- attr_type = H5Tcopy( H5T_STD_REF_OBJ );
-
- /* Create the attribute "PALETTE" to be attached to the image*/
- attr_id = H5Acreate( image_id, "PALETTE", attr_type, attr_space_id, H5P_DEFAULT );
-
- /* Create a reference. The reference is created on the local id. */
- status = H5Rcreate( &ref, loc_id, pal_name, H5R_OBJECT, -1 );
-
- /* Write the attribute with the reference */
- status = H5Awrite( attr_id, attr_type, &ref );
-
- status = H5Sclose( attr_space_id );
-
- }
-
- /* The attribute already exists, open it */
-
- else if ( ok_pal == 1 )
-
- {
-
- attr_id = H5Aopen_name( image_id, "PALETTE" );
-
- attr_type = H5Aget_type( attr_id );
-
- attr_class = H5Tget_class( attr_type );
-
- /* Check if it is really a reference */
-
- if ( attr_class == H5T_REFERENCE )
- {
-
- /* Get and save the old reference(s) */
-
- attr_space_id = H5Aget_space( attr_id );
-
- n_refs = H5Sget_simple_extent_npoints( attr_space_id );
-
- dim_ref = n_refs + 1;
-
- refbuf = malloc( sizeof(hobj_ref_t) * (int)dim_ref );
-
- status = H5Aread( attr_id, attr_type, refbuf );
-
- status = H5Sclose( attr_space_id );
-
- /* The attribute must be deleted, in order to the new one can reflect the changes*/
- status = H5Adelete( image_id, "PALETTE" );
-
- /* Create a new reference for this palette. */
- status = H5Rcreate( &ref, loc_id, pal_name, H5R_OBJECT, -1 );
-
- refbuf[n_refs] = ref;
-
- /* Create the data space for the new references */
- attr_space_id = H5Screate_simple( 1, &dim_ref, NULL );
-
- /* Create the attribute again with the changes of space */
- attr_id = H5Acreate( image_id, "PALETTE", attr_type, attr_space_id, H5P_DEFAULT );
-
- /* Write the attribute with the new references */
- status = H5Awrite( attr_id, attr_type, refbuf );
-
- status = H5Sclose( attr_space_id );
-
- free( refbuf );
-
- } /* H5T_REFERENCE */
-
- status = H5Tclose( attr_type );
-
- /* Close the attribute. */
- status = H5Aclose( attr_id );
-
- }
-
- /* Close the image dataset. */
- status = H5Dclose( image_id );
-
- return status;
-}
-
-
-
-
-/*-------------------------------------------------------------------------
- * Function: find_palette
- *
- * Purpose: operator function used by H5L_find_palette
- *
- * Return:
- *
- * Programmer: Pedro Vicente, pvn@ncsa.uiuc.edu
- *
- * Date: May 28, 2001
- *
- * Comments:
- *
- * Modifications:
- *
- *-------------------------------------------------------------------------
- */
-
-static herr_t find_palette( hid_t UNUSED loc_id, const char *name, void *op_data)
-{
-
- /* Define a default zero value for return. This will cause the iterator to continue if
- * the palette attribute is not found yet.
- */
-
- int ret = 0;
-
- /* 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( HDstrcmp( name, "PALETTE" ) == 0 )
- ret = 1;
-
-
- return ret;
-}
-
-
-/*-------------------------------------------------------------------------
- * Function: H5IM_find_palette
- *
- * Purpose: Find the atrribute "PALETTE" in the image dataset
- *
- * Return: Success: 1, Failure: 0
- *
- * Programmer: Pedro Vicente, pvn@ncsa.uiuc.edu
- *
- * Date: May 11, 2001
- *
- * Comments:
- * The function uses H5Aiterate with the operator function find_palette
- *
- * Modifications:
- *
- *-------------------------------------------------------------------------
- */
-
-herr_t H5IM_find_palette( hid_t loc_id )
-{
-
- unsigned int attr_num; /* Starting attribute to look up */
- herr_t ret;
-
- attr_num = 0;
- ret = H5Aiterate( loc_id, &attr_num, find_palette, 0 );
-
- return ret;
-}
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