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/* Copyright (C) 2000 Aladdin Enterprises. All rights reserved.
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This software is provided AS-IS with no warranty, either express or
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implied.
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This software is distributed under license and may not be copied,
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modified or distributed except as expressly authorized under the terms
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of the license contained in the file LICENSE in this distribution.
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For more information about licensing, please refer to
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http://www.ghostscript.com/licensing/. For information on
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commercial licensing, go to http://www.artifex.com/licensing/ or
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contact Artifex Software, Inc., 101 Lucas Valley Road #110,
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San Rafael, CA 94903, U.S.A., +1(415)492-9861.
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*/
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/* $Id: gscindex.h,v 1.5 2002/06/16 08:45:42 lpd Exp $ */
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/* Client interface to Indexed color facilities */
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#ifndef gscindex_INCLUDED
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# define gscindex_INCLUDED
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#include "gscspace.h"
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/*
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* Indexed color spaces.
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*
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* If the color space will use a procedure rather than a byte table,
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* ptbl should be set to 0.
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*
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* Unlike most of the other color space constructors, this one initializes
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* some of the fields of the colorspace. In the case in which a string table
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* is used for mapping, it initializes the entire structure. Note that the
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* client is responsible for the table memory in that case; the color space
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* will not free it when the color space itself is released.
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*
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* For the case of an indexed color space based on a procedure, a default
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* procedure will be provided that simply echoes the color values already in
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* the palette; the client may override these procedures by use of
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* gs_cspace_indexed_set_proc. If the client wishes to insert values into
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* the palette, it should do so by using gs_cspace_indexed_value_array, and
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* directly inserting the desired values into the array.
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*
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* If the client does insert values into the palette directly, the default
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* procedures provided by the client are fairly efficient, and there are
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* few instances in which the client would need to replace them.
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*/
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extern int gs_cspace_build_Indexed(
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gs_color_space ** ppcspace,
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const gs_color_space * pbase_cspace,
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uint num_entries,
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const gs_const_string * ptbl,
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gs_memory_t * pmem
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);
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/* Return the number of entries in the palette of an indexed color space. */
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extern int gs_cspace_indexed_num_entries(
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const gs_color_space * pcspace
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);
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/* In the case of a procedure-based indexed color space, get a pointer to */
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/* the array of cached values. */
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extern float *gs_cspace_indexed_value_array(
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const gs_color_space * pcspace
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);
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/* Set the lookup procedure to be used for an Indexed color space. */
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extern int gs_cspace_indexed_set_proc(
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gs_color_space * pcspace,
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int (*proc) (const gs_indexed_params *, int, float *)
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);
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/* Look up an index in an Indexed color space. */
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int gs_cspace_indexed_lookup(const gs_indexed_params *, int,
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gs_client_color *);
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#endif /* gscindex_INCLUDED */
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