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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#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 <stdio.h>
#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)))
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;
struct _cairo_path_fixed {
cairo_point_t last_move_point;
cairo_point_t current_point;
unsigned int has_current_point : 1;
unsigned int has_last_move_point : 1;
unsigned int has_curve_to : 1;
unsigned int is_rectilinear : 1;
unsigned int maybe_fill_region : 1;
unsigned int is_empty_fill : 1;
cairo_box_t extents;
cairo_path_buf_fixed_t buf;
};
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_direction_t dir,
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->is_empty_fill;
}
static inline cairo_bool_t
_cairo_path_fixed_is_rectilinear_fill (const cairo_path_fixed_t *path)
{
if (! path->is_rectilinear)
return 0;
if (! path->has_current_point)
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_maybe_fill_region (const cairo_path_fixed_t *path)
{
#if WATCH_PATH
fprintf (stderr, "_cairo_path_fixed_maybe_fill_region () = %s\n",
path->maybe_fill_region ? "true" : "false");
#endif
return path->maybe_fill_region;
}
#endif /* CAIRO_PATH_FIXED_PRIVATE_H */
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