diff options
Diffstat (limited to 'gs/src/gzcpath.h')
| -rw-r--r-- | gs/src/gzcpath.h | 127 |
1 files changed, 90 insertions, 37 deletions
diff --git a/gs/src/gzcpath.h b/gs/src/gzcpath.h index 6819d52e7..b88ca5785 100644 --- a/gs/src/gzcpath.h +++ b/gs/src/gzcpath.h @@ -1,47 +1,100 @@ -/* Copyright (C) 1994, 1996 Aladdin Enterprises. All rights reserved. - - This file is part of Aladdin Ghostscript. - - Aladdin 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 Ghostscript Free Public - License (the "License") for full details. - - Every copy of Aladdin 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 Aladdin 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. -*/ - -/* gzcpath.h */ -/* Private representation of clipping paths for Ghostscript library */ +/* Copyright (C) 1994, 1996, 1997, 1998 Aladdin Enterprises. All rights reserved. + + This file is part of Aladdin Ghostscript. + + Aladdin 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 Ghostscript Free Public + License (the "License") for full details. + + Every copy of Aladdin 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 Aladdin 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: gzcpath.h */ /* Requires gzpath.h. */ + +#ifndef gzcpath_INCLUDED +# define gzcpath_INCLUDED + #include "gxcpath.h" +/* + * The reference counting considerations for clip paths are the same as + * for paths. We need a separate reference count for the clip list, + * since its existence and lifetime are not necessarily the same as + * those of the path. + */ + +typedef struct gx_clip_rect_list_s { + rc_header rc; + gx_clip_list list; +} gx_clip_rect_list; + +#define private_st_clip_rect_list() /* in gxcpath.c */\ + gs_private_st_ptrs_add0(st_clip_rect_list, gx_clip_rect_list,\ + "gx_clip_rect_list", clip_rect_list_enum_ptrs, clip_rect_list_reloc_ptrs,\ + st_clip_list, list) + /* gx_clip_path is a 'subclass' of gx_path. */ struct gx_clip_path_s { - gx_path path; - int rule; /* rule for insideness of path */ - /* Anything within the inner_box is guaranteed to fall */ - /* entirely within the clipping path. */ - gs_fixed_rect inner_box; - /* Anything outside the outer_box is guaranteed to fall */ - /* entirely outside the clipping path. This is the same */ - /* as the path bounding box, widened to pixel boundaries. */ - gs_fixed_rect outer_box; - gx_clip_list list; - char segments_valid; /* segment representation is valid */ - char shares_list; /* if true, this path shares its */ - /* clip list storage with the one in */ - /* the previous saved graphics state */ - /* The id changes whenever the clipping region changes. */ - gs_id id; + gx_path path; + gx_clip_rect_list local_list; + int rule; /* rule for insideness of path */ + /* Anything within the inner_box is guaranteed to fall */ + /* entirely within the clipping path. */ + gs_fixed_rect inner_box; + /* Anything outside the outer_box is guaranteed to fall */ + /* entirely outside the clipping path. This is the same */ + /* as the path bounding box, widened to pixel boundaries. */ + gs_fixed_rect outer_box; + gx_clip_rect_list *rect_list; + bool path_valid; /* path representation is valid */ + /* The id changes whenever the clipping region changes. */ + gs_id id; }; + extern_st(st_clip_path); #define public_st_clip_path() /* in gxcpath.c */\ gs_public_st_composite(st_clip_path, gx_clip_path, "clip_path",\ clip_path_enum_ptrs, clip_path_reloc_ptrs) -#define st_clip_path_max_ptrs (st_path_max_ptrs + st_clip_list_max_ptrs) +#define st_clip_path_max_ptrs (st_path_max_ptrs + 1) + +/* Inline accessors. */ +#define gx_cpath_is_shared(pcpath)\ + ((pcpath)->rect_list->rc.ref_count > 1) +#define gx_cpath_list(pcpath)\ + (&(pcpath)->rect_list->list) + +/* Define the structure for enumerating a clipping list. */ +typedef enum { + visit_left = 1, + visit_right = 2 +} cpe_visit_t; +typedef enum { + cpe_scan, cpe_left, cpe_right, cpe_close, cpe_done +} cpe_state_t; +struct gs_cpath_enum_s { + gs_path_enum path_enum; /* used iff clipping path exists as a path, */ + /* must be first for subclassing */ + bool using_path; + gx_clip_rect *visit; /* scan pointer for finding next start */ + gx_clip_rect *rp; /* scan pointer for current rectangle */ + cpe_visit_t first_visit; + cpe_state_t state; + bool have_line; + gs_int_point line_end; + bool any_rectangles; +}; + +#define private_st_cpath_enum() /* in gxcpath.c */\ + gs_private_st_suffix_add2(st_cpath_enum, gs_cpath_enum, "gs_cpath_enum",\ + cpath_enum_enum_ptrs, cpath_enum_reloc_ptrs, st_path_enum,\ + visit, rp) + +#endif /* gzcpath_INCLUDED */ |