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14952 | fschmid | 1 | /* cairo - a vector graphics library with display and print output |
2 | * |
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3 | * Copyright © 2005 Red Hat, Inc. |
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4 | * |
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5 | * This library is free software; you can redistribute it and/or |
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6 | * modify it either under the terms of the GNU Lesser General Public |
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7 | * License version 2.1 as published by the Free Software Foundation |
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8 | * (the "LGPL") or, at your option, under the terms of the Mozilla |
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9 | * Public License Version 1.1 (the "MPL"). If you do not alter this |
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10 | * notice, a recipient may use your version of this file under either |
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11 | * the MPL or the LGPL. |
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12 | * |
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13 | * You should have received a copy of the LGPL along with this library |
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14 | * in the file COPYING-LGPL-2.1; if not, write to the Free Software |
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18122 | mrdocs | 15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
14952 | fschmid | 16 | * You should have received a copy of the MPL along with this library |
17 | * in the file COPYING-MPL-1.1 |
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18 | * |
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19 | * The contents of this file are subject to the Mozilla Public License |
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20 | * Version 1.1 (the "License"); you may not use this file except in |
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21 | * compliance with the License. You may obtain a copy of the License at |
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22 | * http://www.mozilla.org/MPL/ |
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23 | * |
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24 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY |
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25 | * OF ANY KIND, either express or implied. See the LGPL or the MPL for |
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26 | * the specific language governing rights and limitations. |
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27 | * |
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28 | * The Original Code is the cairo graphics library. |
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29 | * |
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30 | * The Initial Developer of the Original Code is Red Hat, Inc. |
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31 | * |
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32 | * Contributor(s): |
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33 | * Carl D. Worth <cworth@redhat.com> |
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34 | */ |
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35 | |||
36 | #ifndef CAIRO_PATH_FIXED_PRIVATE_H |
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37 | #define CAIRO_PATH_FIXED_PRIVATE_H |
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38 | |||
39 | #include "cairo-types-private.h" |
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40 | #include "cairo-compiler-private.h" |
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41 | #include "cairo-list-private.h" |
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42 | |||
43 | #define WATCH_PATH 0 |
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44 | #if WATCH_PATH |
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45 | #include <stdio.h> |
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46 | #endif |
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47 | |||
48 | enum cairo_path_op { |
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49 | CAIRO_PATH_OP_MOVE_TO = 0, |
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50 | CAIRO_PATH_OP_LINE_TO = 1, |
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51 | CAIRO_PATH_OP_CURVE_TO = 2, |
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52 | CAIRO_PATH_OP_CLOSE_PATH = 3 |
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53 | }; |
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54 | |||
55 | /* we want to make sure a single byte is used for the enum */ |
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56 | typedef char cairo_path_op_t; |
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57 | |||
58 | /* make _cairo_path_fixed fit into ~512 bytes -- about 50 items */ |
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59 | #define CAIRO_PATH_BUF_SIZE ((512 - sizeof (cairo_path_buf_t)) \ |
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60 | / (2 * sizeof (cairo_point_t) + sizeof (cairo_path_op_t))) |
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61 | |||
62 | typedef struct _cairo_path_buf { |
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63 | cairo_list_t link; |
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64 | unsigned int buf_size; |
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65 | unsigned int num_ops; |
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66 | unsigned int num_points; |
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67 | |||
68 | cairo_path_op_t *op; |
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69 | cairo_point_t *points; |
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70 | } cairo_path_buf_t; |
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71 | |||
72 | typedef struct _cairo_path_buf_fixed { |
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73 | cairo_path_buf_t base; |
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74 | |||
75 | cairo_path_op_t op[CAIRO_PATH_BUF_SIZE]; |
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76 | cairo_point_t points[2 * CAIRO_PATH_BUF_SIZE]; |
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77 | } cairo_path_buf_fixed_t; |
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78 | |||
79 | struct _cairo_path_fixed { |
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80 | cairo_point_t last_move_point; |
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81 | cairo_point_t current_point; |
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82 | unsigned int has_current_point : 1; |
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83 | unsigned int has_curve_to : 1; |
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84 | unsigned int is_rectilinear : 1; |
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85 | unsigned int maybe_fill_region : 1; |
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86 | unsigned int is_empty_fill : 1; |
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87 | |||
88 | cairo_path_buf_fixed_t buf; |
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89 | }; |
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90 | |||
91 | |||
92 | cairo_private void |
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93 | _cairo_path_fixed_translate (cairo_path_fixed_t *path, |
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94 | cairo_fixed_t offx, |
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95 | cairo_fixed_t offy); |
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96 | |||
97 | cairo_private cairo_status_t |
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98 | _cairo_path_fixed_append (cairo_path_fixed_t *path, |
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99 | const cairo_path_fixed_t *other, |
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100 | cairo_direction_t dir, |
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101 | cairo_fixed_t tx, |
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102 | cairo_fixed_t ty); |
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103 | |||
104 | cairo_private unsigned long |
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105 | _cairo_path_fixed_hash (const cairo_path_fixed_t *path); |
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106 | |||
107 | cairo_private unsigned long |
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108 | _cairo_path_fixed_size (const cairo_path_fixed_t *path); |
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109 | |||
110 | cairo_private cairo_bool_t |
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111 | _cairo_path_fixed_equal (const cairo_path_fixed_t *a, |
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112 | const cairo_path_fixed_t *b); |
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113 | |||
114 | typedef struct _cairo_path_fixed_iter { |
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115 | const cairo_path_buf_t *first; |
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116 | const cairo_path_buf_t *buf; |
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117 | unsigned int n_op; |
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118 | unsigned int n_point; |
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119 | } cairo_path_fixed_iter_t; |
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120 | |||
121 | cairo_private void |
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122 | _cairo_path_fixed_iter_init (cairo_path_fixed_iter_t *iter, |
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123 | const cairo_path_fixed_t *path); |
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124 | |||
125 | cairo_private cairo_bool_t |
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126 | _cairo_path_fixed_iter_is_fill_box (cairo_path_fixed_iter_t *_iter, |
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127 | cairo_box_t *box); |
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128 | |||
129 | cairo_private cairo_bool_t |
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130 | _cairo_path_fixed_iter_at_end (const cairo_path_fixed_iter_t *iter); |
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131 | |||
132 | static inline cairo_bool_t |
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133 | _cairo_path_fixed_fill_is_empty (const cairo_path_fixed_t *path) |
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134 | { |
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135 | return path->is_empty_fill; |
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136 | } |
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137 | |||
138 | static inline cairo_bool_t |
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139 | _cairo_path_fixed_is_rectilinear_fill (const cairo_path_fixed_t *path) |
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140 | { |
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141 | if (! path->is_rectilinear) |
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142 | return 0; |
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143 | |||
144 | if (! path->has_current_point) |
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145 | return 1; |
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146 | |||
147 | /* check whether the implicit close preserves the rectilinear property */ |
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148 | return path->current_point.x == path->last_move_point.x || |
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149 | path->current_point.y == path->last_move_point.y; |
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150 | } |
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151 | |||
152 | static inline cairo_bool_t |
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153 | _cairo_path_fixed_maybe_fill_region (const cairo_path_fixed_t *path) |
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154 | { |
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155 | #if WATCH_PATH |
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156 | fprintf (stderr, "_cairo_path_fixed_maybe_fill_region () = %s\n", |
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157 | path->maybe_fill_region ? "true" : "false"); |
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158 | #endif |
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159 | return path->maybe_fill_region; |
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160 | } |
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161 | |||
162 | #endif /* CAIRO_PATH_FIXED_PRIVATE_H */ |