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- /* Copyright (C) 1997, 1998, 1999, 2000 Aladdin Enterprises. All rights reserved.
-
- This file is part of AFPL Ghostscript.
-
- AFPL Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author or
- distributor accepts any responsibility for the consequences of using it, or
- for whether it serves any particular purpose or works at all, unless he or
- she says so in writing. Refer to the Aladdin Free Public License (the
- "License") for full details.
-
- Every copy of AFPL Ghostscript must include a copy of the License, normally
- in a plain ASCII text file named PUBLIC. The License grants you the right
- to copy, modify and redistribute AFPL Ghostscript, but only under certain
- conditions described in the License. Among other things, the License
- requires that the copyright notice and this notice be preserved on all
- copies.
- */
-
- /*$Id: gstrap.c,v 1.3 2000/09/19 19:00:33 lpd Exp $ */
- /* Setting trapping parameters and zones */
- #include "string_.h"
- #include "gx.h"
- #include "gserrors.h"
- #include "gstrap.h"
- #include "gsparamx.h"
-
- /* Put a float parameter. */
- private bool
- check_unit(float *pval)
- {
- return (*pval >= 0 && *pval <= 1);
- }
- private bool
- check_positive(float *pval)
- {
- return (*pval > 0);
- }
- private int
- trap_put_float_param(gs_param_list * plist, gs_param_name param_name,
- float *pval, bool(*check) (P1(float *pval)), int ecode)
- {
- int code;
-
- switch (code = param_read_float(plist, param_name, pval)) {
- case 0:
- if ((*check) (pval))
- return 0;
- code = gs_error_rangecheck;
- default:
- ecode = code;
- param_signal_error(plist, param_name, ecode);
- break;
- case 1:
- break;
- }
- return ecode;
- }
-
- /* settrapparams */
- int
- gs_settrapparams(gs_trap_params_t * pparams, gs_param_list * plist)
- {
- gs_trap_params_t params;
- int ecode = 0;
- static const char *const trap_placement_names[] = {
- gs_trap_placement_names, 0
- };
-
- params = *pparams;
- ecode = trap_put_float_param(plist, "BlackColorLimit",
- ¶ms.BlackColorLimit, check_unit, ecode);
- ecode = trap_put_float_param(plist, "BlackDensityLimit",
- ¶ms.BlackDensityLimit,
- check_positive, ecode);
- ecode = trap_put_float_param(plist, "BlackWidth",
- ¶ms.BlackWidth, check_positive, ecode);
- ecode = param_put_bool(plist, "Enabled",
- ¶ms.Enabled, ecode);
- ecode = param_put_bool(plist, "ImageInternalTrapping",
- ¶ms.ImageInternalTrapping, ecode);
- ecode = param_put_bool(plist, "ImagemaskTrapping",
- ¶ms.ImagemaskTrapping, ecode);
- ecode = param_put_int(plist, "ImageResolution",
- ¶ms.ImageResolution, ecode);
- if (params.ImageResolution <= 0)
- param_signal_error(plist, "ImageResolution",
- ecode = gs_error_rangecheck);
- ecode = param_put_bool(plist, "ImageToObjectTrapping",
- ¶ms.ImageToObjectTrapping, ecode);
- {
- int placement = params.ImageTrapPlacement;
-
- ecode = param_put_enum(plist, "ImageTrapPlacement",
- &placement, trap_placement_names, ecode);
- params.ImageTrapPlacement = placement;
- }
- ecode = trap_put_float_param(plist, "SlidingTrapLimit",
- ¶ms.SlidingTrapLimit, check_unit, ecode);
- ecode = trap_put_float_param(plist, "StepLimit",
- ¶ms.StepLimit, check_unit, ecode);
- ecode = trap_put_float_param(plist, "TrapColorScaling",
- ¶ms.TrapColorScaling, check_unit, ecode);
- ecode = trap_put_float_param(plist, "TrapWidth",
- ¶ms.TrapWidth, check_positive, ecode);
- if (ecode < 0)
- return ecode;
- *pparams = params;
- return 0;
- }
-