home *** CD-ROM | disk | FTP | other *** search
- /* Copyright (C) 1989, 1992, 1993 Aladdin Enterprises. All rights reserved.
-
- This file is part of Ghostscript.
-
- Ghostscript is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY. No author or distributor accepts responsibility
- to anyone for the consequences of using it or for whether it serves any
- particular purpose or works at all, unless he says so in writing. Refer
- to the Ghostscript General Public License for full details.
-
- Everyone is granted permission to copy, modify and redistribute
- Ghostscript, but only under the conditions described in the Ghostscript
- General Public License. A copy of this license is supposed to have been
- given to you along with Ghostscript so you can know your rights and
- responsibilities. It should be in a file named COPYING. Among other
- things, the copyright notice and this notice must be preserved on all
- copies. */
-
- /* gxpath.h */
- /* Lower-level path routines for Ghostscript library */
- /* Requires gxfixed.h */
-
- /* The routines and types in this interface use */
- /* device, rather than user, coordinates, and fixed-point, */
- /* rather than floating, representation. */
-
- /* Opaque type for a path */
- typedef struct gx_path_s gx_path;
- extern const uint gs_path_sizeof;
-
- /* Opaque type for a path enumerator */
- typedef struct gx_path_enum_s gx_path_enum;
- extern const uint gx_path_enum_sizeof;
-
- /* Define the two insideness rules */
- #define gx_rule_winding_number (-1)
- #define gx_rule_even_odd 1
-
- /* Debugging routines */
- #ifdef DEBUG
- extern void gx_path_print(P1(const gx_path *));
- #endif
-
- /* Path constructors. */
- extern void gx_path_init(P2(gx_path *, const gs_memory_procs *)),
- gx_path_reset(P1(gx_path *)),
- gx_path_release(P1(gx_path *)),
- gx_path_share(P1(gx_path *));
- extern int gx_path_add_point(P3(gx_path *, fixed, fixed)),
- gx_path_add_relative_point(P3(gx_path *, fixed, fixed)),
- gx_path_add_line(P3(gx_path *, fixed, fixed)),
- gx_path_add_rectangle(P5(gx_path *, fixed, fixed, fixed, fixed)),
- gx_path_add_pgram(P7(gx_path *, fixed, fixed, fixed, fixed, fixed, fixed)),
- gx_path_add_curve(P7(gx_path *, fixed, fixed, fixed, fixed, fixed, fixed)),
- gx_path_add_flattened_curve(P8(gx_path *, fixed, fixed, fixed, fixed, fixed, fixed, floatp)),
- gx_path_add_arc(P8(gx_path *, fixed, fixed, fixed, fixed, fixed, fixed, floatp)),
- gx_path_add_path(P2(gx_path *, gx_path *)),
- gx_path_close_subpath(P1(gx_path *));
- /* The last argument to gx_path_add_arc is a fraction for computing */
- /* the curve parameters. Here is the correct value for quarter-circles. */
- /* (stroke uses this to draw round caps and joins.) */
- #define quarter_arc_fraction 0.552285
-
- /* Path accessors */
-
- extern int gx_path_current_point(P2(const gx_path *, gs_fixed_point *)),
- gx_path_bbox(P2(gx_path *, gs_fixed_rect *)),
- gx_path_has_curves(P1(const gx_path *)),
- gx_path_is_void(P1(const gx_path *)),
- gx_path_is_rectangle(P2(const gx_path *, gs_fixed_rect *));
- /* Inline versions of the above */
- #define gx_path_is_void_inline(ppath) ((ppath)->first_subpath == 0)
- #define gx_path_has_curves_inline(ppath) ((ppath)->curve_count != 0)
-
- /* Path transformers */
-
- extern int gx_path_copy(P3(const gx_path * /*old*/, gx_path * /*new*/, int /*init*/)),
- gx_path_flatten(P4(const gx_path * /*old*/, gx_path * /*new*/, floatp, int)),
- gx_path_copy_reversed(P3(const gx_path * /*old*/, gx_path * /*new*/, int /*init*/)),
- gx_path_translate(P3(gx_path *, fixed, fixed)),
- gx_path_scale(P3(gx_path *, floatp, floatp));
-
- /* ------ Clipping paths ------ */
-
- /* Opaque type for a path */
- typedef struct gx_clip_path_s gx_clip_path;
- extern const uint gs_clip_path_sizeof;
-
- extern int gx_clip_to_rectangle(P2(gs_state *, gs_fixed_rect *)),
- gx_clip_to_path(P1(gs_state *)),
- gx_cpath_init(P2(gx_clip_path *, const gs_memory_procs *)),
- gx_cpath_from_rectangle(P3(gx_clip_path *, gs_fixed_rect *, const gs_memory_procs *)),
- gx_cpath_intersect(P4(gs_state *, gx_clip_path *, gx_path *, int));
- extern void gx_cpath_release(P1(gx_clip_path *)),
- gx_cpath_share(P1(gx_clip_path *));
- extern int gx_cpath_path(P2(gx_clip_path *, gx_path *)),
- gx_cpath_box_for_check(P2(const gx_clip_path *, gs_fixed_rect *)),
- gx_cpath_includes_rectangle(P5(const gx_clip_path *, fixed, fixed, fixed, fixed));
-
- /* Opaque type for a clip list. */
- typedef struct gx_clip_list_s gx_clip_list;
-