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/* Copyright (C) 1997, 1999 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: gsfunc0.h,v 1.7 2005/04/19 07:27:32 igor Exp $ */
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/* Definitions for FunctionType 0 (Sampled) Functions */
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#ifndef gsfunc0_INCLUDED
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# define gsfunc0_INCLUDED
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#include "gsfunc.h"
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#include "gsdsrc.h"
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/* ---------------- Types and structures ---------------- */
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/* Define the Function type. */
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#define function_type_Sampled 0
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/* Define Sampled functions. */
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typedef struct gs_function_Sd_params_s {
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gs_function_params_common;
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int Order; /* 1 or 3, optional */
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gs_data_source_t DataSource;
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int BitsPerSample; /* 1, 2, 4, 8, 12, 16, 24, 32 */
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const float *Encode; /* 2 x m, optional */
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const float *Decode; /* 2 x n, optional */
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const int *Size; /* m */
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double *pole; /* cached poles (internal data) */
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int *array_step; /* pole array element step by dimensions */
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int *stream_step; /* sample stream element step by dimensions */
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int array_size; /* The number of elements in the pole array. */
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} gs_function_Sd_params_t;
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#define private_st_function_Sd() /* in gsfunc.c */\
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gs_private_st_composite(st_function_Sd, gs_function_Sd_t,\
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"gs_function_Sd_t", function_Sd_enum_ptrs, function_Sd_reloc_ptrs)
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/* ---------------- Procedures ---------------- */
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/* Allocate and initialize a Sampled function. */
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int gs_function_Sd_init(gs_function_t ** ppfn,
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const gs_function_Sd_params_t * params,
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gs_memory_t * mem);
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/* Free the parameters of a Sampled function. */
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void gs_function_Sd_free_params(gs_function_Sd_params_t * params,
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gs_memory_t * mem);
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#endif /* gsfunc0_INCLUDED */
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