harvey/sys/src/cmd/gs/src/gswts.h

/* Copyright (C) 2002 artofcode LLC.  All rights reserved.
  
  This software is provided AS-IS with no warranty, either express or
  implied.
  
  This software is distributed under license and may not be copied,
  modified or distributed except as expressly authorized under the terms
  of the license contained in the file LICENSE in this distribution.
  
  For more information about licensing, please refer to
  http://www.ghostscript.com/licensing/. For information on
  commercial licensing, go to http://www.artifex.com/licensing/ or
  contact Artifex Software, Inc., 101 Lucas Valley Road #110,
  San Rafael, CA  94903, U.S.A., +1(415)492-9861.
*/
/*$Id: gswts.h,v 1.2 2002/11/02 07:31:45 raph Exp $ */
#ifndef gswts_INCLUDED
#  define gswts_INCLUDED

#ifndef gs_wts_screen_enum_t_DEFINED
#  define gs_wts_screen_enum_t_DEFINED
typedef struct gs_wts_screen_enum_s gs_wts_screen_enum_t;
#endif

typedef struct gx_wts_cell_params_s gx_wts_cell_params_t;

/* Note: this corresponds roughly to the SP structure in the WTS code. */
struct gx_wts_cell_params_s {
    wts_screen_type t;
    int width;
    int height;
    double ufast;
    double vfast;
    double uslow;
    double vslow;
};

gx_wts_cell_params_t *
wts_pick_cell_size(gs_screen_halftone *ph, const gs_matrix *pmat);

gs_wts_screen_enum_t *
gs_wts_screen_enum_new(gx_wts_cell_params_t *wcp);

int
gs_wts_screen_enum_currentpoint(gs_wts_screen_enum_t *wse, gs_point *ppt);

int
gs_wts_screen_enum_next(gs_wts_screen_enum_t *wse, floatp value);

int
wts_sort_blue(gs_wts_screen_enum_t *wse);

int
wts_sort_cell(gs_wts_screen_enum_t *wse);

wts_screen_t *
wts_screen_from_enum(const gs_wts_screen_enum_t *wse);

void
gs_wts_free_enum(gs_wts_screen_enum_t *wse);

void
gs_wts_free_screen(wts_screen_t *wts);

#endif