1 /*
2  * Copyright 2018 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package androidx.compose.ui.graphics
18 
19 import androidx.compose.runtime.Immutable
20 
21 /**
22  * Determines the winding rule that decides how the interior of a [Path] is calculated.
23  *
24  * This enum is used by the [Path.fillType] property.
25  */
26 @Immutable
27 @kotlin.jvm.JvmInline
28 value class PathFillType internal constructor(@Suppress("unused") private val value: Int) {
29     companion object {
30         /**
31          * The interior is defined by a non-zero sum of signed edge crossings.
32          *
33          * For a given point, the point is considered to be on the inside of the path if a line
34          * drawn from the point to infinity crosses lines going clockwise around the point a
35          * different number of times than it crosses lines going counter-clockwise around that
36          * point.
37          *
38          * See: <https://en.wikipedia.org/wiki/Nonzero-rule>
39          */
40         val NonZero = PathFillType(0)
41 
42         /**
43          * The interior is defined by an odd number of edge crossings.
44          *
45          * For a given point, the point is considered to be on the inside of the path if a line
46          * drawn from the point to infinity crosses an odd number of lines.
47          *
48          * See: <https://en.wikipedia.org/wiki/Even-odd_rule>
49          */
50         val EvenOdd = PathFillType(1)
51     }
52 
toStringnull53     override fun toString() =
54         when (this) {
55             NonZero -> "NonZero"
56             EvenOdd -> "EvenOdd"
57             else -> "Unknown"
58         }
59 }
60