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/* Copyright (C) 1994, 1996, 1997, 1998, 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: gzcpath.h,v 1.5 2003/11/12 14:29:08 igor Exp $ */
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/* Structure definitions for clipping paths */
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/* Requires gzpath.h. */
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#ifndef gzcpath_INCLUDED
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# define gzcpath_INCLUDED
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#include "gxcpath.h"
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/*
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* The reference counting considerations for clip paths are the same as
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* for paths. We need a separate reference count for the clip list,
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* since its existence and lifetime are not necessarily the same as
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* those of the path.
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*/
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typedef struct gx_clip_rect_list_s {
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rc_header rc;
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gx_clip_list list;
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} gx_clip_rect_list;
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#define private_st_clip_rect_list() /* in gxcpath.c */\
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gs_private_st_ptrs_add0(st_clip_rect_list, gx_clip_rect_list,\
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"gx_clip_rect_list", clip_rect_list_enum_ptrs, clip_rect_list_reloc_ptrs,\
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st_clip_list, list)
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/*
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* When the clip path consists of the intersection of two or more
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* source paths, we maintain the complete list paths, so that it
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* can be accurately output for high-level devices.
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*/
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typedef struct gx_cpath_path_list_s gx_cpath_path_list;
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struct gx_cpath_path_list_s {
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gx_path path;
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rc_header rc;
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int rule;
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gx_cpath_path_list *next;
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};
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#define private_st_cpath_path_list() /* in gxcpath.c */\
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gs_private_st_suffix_add1(st_cpath_path_list, gx_cpath_path_list,\
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"gs_cpath_list", cpath_path_list_enum_ptrs, cpath_path_list_reloc_ptrs,\
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st_path, next)
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/* gx_clip_path is a 'subclass' of gx_path. */
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struct gx_clip_path_s {
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gx_path path;
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gx_clip_rect_list local_list;
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int rule; /* rule for insideness of path */
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/* Anything within the inner_box is guaranteed to fall */
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/* entirely within the clipping path. */
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gs_fixed_rect inner_box;
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/* Anything outside the outer_box is guaranteed to fall */
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/* entirely outside the clipping path. This is the same */
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/* as the path bounding box, widened to pixel boundaries. */
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gs_fixed_rect outer_box;
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gx_clip_rect_list *rect_list;
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bool path_valid; /* path representation is valid */
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gx_cpath_path_list *path_list;
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/* The id changes whenever the clipping region changes. */
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gs_id id;
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};
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extern_st(st_clip_path);
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#define public_st_clip_path() /* in gxcpath.c */\
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gs_public_st_composite(st_clip_path, gx_clip_path, "clip_path",\
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clip_path_enum_ptrs, clip_path_reloc_ptrs)
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#define st_clip_path_max_ptrs (st_path_max_ptrs + 1)
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/* Inline accessors. */
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#define gx_cpath_is_shared(pcpath)\
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((pcpath)->rect_list->rc.ref_count > 1)
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/* Define the structure for enumerating a clipping list. */
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typedef enum {
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visit_left = 1,
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visit_right = 2
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} cpe_visit_t;
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typedef enum {
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cpe_scan, cpe_left, cpe_right, cpe_close, cpe_done
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} cpe_state_t;
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struct gs_cpath_enum_s {
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gs_path_enum path_enum; /* used iff clipping path exists as a path, */
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/* must be first for subclassing */
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bool using_path;
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gx_clip_rect *visit; /* scan pointer for finding next start */
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gx_clip_rect *rp; /* scan pointer for current rectangle */
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cpe_visit_t first_visit;
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cpe_state_t state;
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bool have_line;
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gs_int_point line_end;
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bool any_rectangles;
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};
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#define private_st_cpath_enum() /* in gxcpath.c */\
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gs_private_st_suffix_add2(st_cpath_enum, gs_cpath_enum, "gs_cpath_enum",\
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cpath_enum_enum_ptrs, cpath_enum_reloc_ptrs, st_path_enum,\
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visit, rp)
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#endif /* gzcpath_INCLUDED */
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