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/* Copyright (C) 1997, 1998, 1999, 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: gstrap.c,v 1.6 2002/06/16 05:48:55 lpd Exp $ */
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/* Setting trapping parameters and zones */
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#include "string_.h"
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#include "gx.h"
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#include "gserrors.h"
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#include "gstrap.h"
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#include "gsparamx.h"
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/* Put a float parameter. */
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private bool
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check_unit(float *pval)
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{
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return (*pval >= 0 && *pval <= 1);
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}
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private bool
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check_positive(float *pval)
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{
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return (*pval > 0);
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}
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private int
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trap_put_float_param(gs_param_list * plist, gs_param_name param_name,
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float *pval, bool(*check) (float *pval), int ecode)
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{
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int code;
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switch (code = param_read_float(plist, param_name, pval)) {
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case 0:
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if ((*check) (pval))
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return 0;
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code = gs_error_rangecheck;
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default:
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ecode = code;
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param_signal_error(plist, param_name, ecode);
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break;
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case 1:
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break;
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}
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return ecode;
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}
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/* settrapparams */
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int
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gs_settrapparams(gs_trap_params_t * pparams, gs_param_list * plist)
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{
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gs_trap_params_t params;
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int ecode = 0;
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static const char *const trap_placement_names[] = {
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gs_trap_placement_names, 0
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};
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params = *pparams;
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ecode = trap_put_float_param(plist, "BlackColorLimit",
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¶ms.BlackColorLimit, check_unit, ecode);
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ecode = trap_put_float_param(plist, "BlackDensityLimit",
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¶ms.BlackDensityLimit,
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check_positive, ecode);
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ecode = trap_put_float_param(plist, "BlackWidth",
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¶ms.BlackWidth, check_positive, ecode);
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ecode = param_put_bool(plist, "Enabled",
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¶ms.Enabled, ecode);
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ecode = param_put_bool(plist, "ImageInternalTrapping",
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¶ms.ImageInternalTrapping, ecode);
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ecode = param_put_bool(plist, "ImagemaskTrapping",
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¶ms.ImagemaskTrapping, ecode);
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ecode = param_put_int(plist, "ImageResolution",
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¶ms.ImageResolution, ecode);
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if (params.ImageResolution <= 0)
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param_signal_error(plist, "ImageResolution",
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ecode = gs_error_rangecheck);
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ecode = param_put_bool(plist, "ImageToObjectTrapping",
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¶ms.ImageToObjectTrapping, ecode);
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{
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int placement = params.ImageTrapPlacement;
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ecode = param_put_enum(plist, "ImageTrapPlacement",
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&placement, trap_placement_names, ecode);
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params.ImageTrapPlacement = placement;
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}
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ecode = trap_put_float_param(plist, "SlidingTrapLimit",
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¶ms.SlidingTrapLimit, check_unit, ecode);
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ecode = trap_put_float_param(plist, "StepLimit",
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¶ms.StepLimit, check_unit, ecode);
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ecode = trap_put_float_param(plist, "TrapColorScaling",
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¶ms.TrapColorScaling, check_unit, ecode);
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ecode = trap_put_float_param(plist, "TrapWidth",
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¶ms.TrapWidth, check_positive, ecode);
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if (ecode < 0)
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return ecode;
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*pparams = params;
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return 0;
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}
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