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  * Defines how a list of points is interpreted when drawing a set of triangles.
23  *
24  * Used by [Canvas.drawVertices].
25  */
26 @Immutable
27 @kotlin.jvm.JvmInline
28 value class VertexMode internal constructor(@Suppress("unused") private val value: Int) {
29 
30     companion object {
31         /** Draw each sequence of three points as the vertices of a triangle. */
32         val Triangles = VertexMode(0)
33 
34         /** Draw each sliding window of three points as the vertices of a triangle. */
35         val TriangleStrip = VertexMode(1)
36 
37         /**
38          * Draw the first point and each sliding window of two points as the vertices of a triangle.
39          */
40         val TriangleFan = VertexMode(2)
41     }
42 
toStringnull43     override fun toString() =
44         when (this) {
45             Triangles -> "Triangles"
46             TriangleStrip -> "TriangleStrip"
47             TriangleFan -> "TriangleFan"
48             else -> "Unknown"
49         }
50 }
51