/* cairo - a vector graphics library with display and print output * * Copyright © 2005 Red Hat, Inc. * * This library is free software; you can redistribute it and/or * modify it either under the terms of the GNU Lesser General Public * License version 2.1 as published by the Free Software Foundation * (the "LGPL") or, at your option, under the terms of the Mozilla * Public License Version 1.1 (the "MPL"). If you do not alter this * notice, a recipient may use your version of this file under either * the MPL or the LGPL. * * You should have received a copy of the LGPL along with this library * in the file COPYING-LGPL-2.1; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA * You should have received a copy of the MPL along with this library * in the file COPYING-MPL-1.1 * * The contents of this file are subject to the Mozilla Public License * Version 1.1 (the "License"); you may not use this file except in * compliance with the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY * OF ANY KIND, either express or implied. See the LGPL or the MPL for * the specific language governing rights and limitations. * * The Original Code is the cairo graphics library. * * The Initial Developer of the Original Code is Red Hat, Inc. * * Contributor(s): * Carl D. Worth */ #ifndef CAIRO_PATH_FIXED_PRIVATE_H #define CAIRO_PATH_FIXED_PRIVATE_H #include "cairo-types-private.h" #include "cairo-compiler-private.h" #include "cairo-list-private.h" #define WATCH_PATH 0 #if WATCH_PATH #include #endif enum cairo_path_op { CAIRO_PATH_OP_MOVE_TO = 0, CAIRO_PATH_OP_LINE_TO = 1, CAIRO_PATH_OP_CURVE_TO = 2, CAIRO_PATH_OP_CLOSE_PATH = 3 }; /* we want to make sure a single byte is used for the enum */ typedef char cairo_path_op_t; /* make _cairo_path_fixed fit into ~512 bytes -- about 50 items */ #define CAIRO_PATH_BUF_SIZE ((512 - sizeof (cairo_path_buf_t)) \ / (2 * sizeof (cairo_point_t) + sizeof (cairo_path_op_t))) #define cairo_path_head(path__) (&(path__)->buf.base) #define cairo_path_tail(path__) cairo_path_buf_prev (cairo_path_head (path__)) #define cairo_path_buf_next(pos__) \ cairo_list_entry ((pos__)->link.next, cairo_path_buf_t, link) #define cairo_path_buf_prev(pos__) \ cairo_list_entry ((pos__)->link.prev, cairo_path_buf_t, link) #define cairo_path_foreach_buf_start(pos__, path__) \ pos__ = cairo_path_head (path__); do #define cairo_path_foreach_buf_end(pos__, path__) \ while ((pos__ = cairo_path_buf_next (pos__)) != cairo_path_head (path__)) typedef struct _cairo_path_buf { cairo_list_t link; unsigned int num_ops; unsigned int size_ops; unsigned int num_points; unsigned int size_points; cairo_path_op_t *op; cairo_point_t *points; } cairo_path_buf_t; typedef struct _cairo_path_buf_fixed { cairo_path_buf_t base; cairo_path_op_t op[CAIRO_PATH_BUF_SIZE]; cairo_point_t points[2 * CAIRO_PATH_BUF_SIZE]; } cairo_path_buf_fixed_t; /* NOTES: has_curve_to => !stroke_is_rectilinear fill_is_rectilinear => stroke_is_rectilinear fill_is_empty => fill_is_rectilinear fill_maybe_region => fill_is_rectilinear */ struct _cairo_path_fixed { cairo_point_t last_move_point; cairo_point_t current_point; cairo_point_t start_point; unsigned int has_current_point : 1; unsigned int needs_move_to : 1; unsigned int has_extents : 1; unsigned int has_curve_to : 1; unsigned int stroke_is_rectilinear : 1; unsigned int fill_is_rectilinear : 1; unsigned int fill_maybe_region : 1; unsigned int fill_is_empty : 1; cairo_box_t extents; cairo_path_buf_fixed_t buf; unsigned int is_convex : 1; }; cairo_private void _cairo_path_fixed_translate (cairo_path_fixed_t *path, cairo_fixed_t offx, cairo_fixed_t offy); cairo_private cairo_status_t _cairo_path_fixed_append (cairo_path_fixed_t *path, const cairo_path_fixed_t *other, cairo_fixed_t tx, cairo_fixed_t ty); cairo_private unsigned long _cairo_path_fixed_hash (const cairo_path_fixed_t *path); cairo_private unsigned long _cairo_path_fixed_size (const cairo_path_fixed_t *path); cairo_private cairo_bool_t _cairo_path_fixed_equal (const cairo_path_fixed_t *a, const cairo_path_fixed_t *b); typedef struct _cairo_path_fixed_iter { const cairo_path_buf_t *first; const cairo_path_buf_t *buf; unsigned int n_op; unsigned int n_point; } cairo_path_fixed_iter_t; cairo_private void _cairo_path_fixed_iter_init (cairo_path_fixed_iter_t *iter, const cairo_path_fixed_t *path); cairo_private cairo_bool_t _cairo_path_fixed_iter_is_fill_box (cairo_path_fixed_iter_t *_iter, cairo_box_t *box); cairo_private cairo_bool_t _cairo_path_fixed_iter_at_end (const cairo_path_fixed_iter_t *iter); static inline cairo_bool_t _cairo_path_fixed_fill_is_empty (const cairo_path_fixed_t *path) { return path->fill_is_empty; } static inline cairo_bool_t _cairo_path_fixed_fill_is_rectilinear (const cairo_path_fixed_t *path) { if (! path->fill_is_rectilinear) return 0; if (! path->has_current_point || path->needs_move_to) return 1; /* check whether the implicit close preserves the rectilinear property */ return path->current_point.x == path->last_move_point.x || path->current_point.y == path->last_move_point.y; } static inline cairo_bool_t _cairo_path_fixed_stroke_is_rectilinear (const cairo_path_fixed_t *path) { return path->stroke_is_rectilinear; } static inline cairo_bool_t _cairo_path_fixed_fill_maybe_region (const cairo_path_fixed_t *path) { if (! path->fill_maybe_region) return 0; if (! path->has_current_point || path->needs_move_to) return 1; /* check whether the implicit close preserves the rectilinear property * (the integer point property is automatically preserved) */ return path->current_point.x == path->last_move_point.x || path->current_point.y == path->last_move_point.y; } cairo_private cairo_bool_t _cairo_path_fixed_is_stroke_box (const cairo_path_fixed_t *path, cairo_box_t *box); cairo_private cairo_bool_t _cairo_path_fixed_is_simple_quad (const cairo_path_fixed_t *path); #endif /* CAIRO_PATH_FIXED_PRIVATE_H */