A game about forced loneliness, made by TACStudios
tacstudios.tngl.sh
1using System;
2using UnityEngine;
3using Unity.Collections;
4using Unity.Collections.LowLevel.Unsafe;
5using Unity.Jobs;
6using Unity.Burst;
7
8namespace UnityEditor.U2D.Common
9{
10 [BurstCompile]
11 internal struct FindTightRectJob : IJobParallelFor
12 {
13 [ReadOnly, DeallocateOnJobCompletion]
14 NativeArray<IntPtr> m_Buffers;
15 [ReadOnly, DeallocateOnJobCompletion]
16 NativeArray<int> m_Width;
17 [ReadOnly, DeallocateOnJobCompletion]
18 NativeArray<int> m_Height;
19 NativeArray<RectInt> m_Output;
20
21 public unsafe void Execute(int index)
22 {
23 var rect = new RectInt(m_Width[index], m_Height[index], 0, 0);
24
25 if (m_Height[index] == 0 || m_Width[index] == 0)
26 {
27 m_Output[index] = rect;
28 return;
29 }
30
31 var color = (Color32*)m_Buffers[index].ToPointer();
32 for (int i = 0; i < m_Height[index]; ++i)
33 {
34 for (int j = 0; j < m_Width[index]; ++j)
35 {
36 if (color->a != 0)
37 {
38 rect.x = Mathf.Min(j, rect.x);
39 rect.y = Mathf.Min(i, rect.y);
40 rect.width = Mathf.Max(j, rect.width);
41 rect.height = Mathf.Max(i, rect.height);
42 }
43 ++color;
44 }
45 }
46 rect.width = Mathf.Max(0, rect.width - rect.x + 1);
47 rect.height = Mathf.Max(0, rect.height - rect.y + 1);
48 m_Output[index] = rect;
49 }
50
51 public static unsafe RectInt[] Execute(NativeArray<Color32>[] buffers, int[] width, int[] height)
52 {
53 var job = new FindTightRectJob();
54 job.m_Buffers = new NativeArray<IntPtr>(buffers.Length, Allocator.TempJob);
55 job.m_Width = new NativeArray<int>(width.Length, Allocator.TempJob);
56 job.m_Height = new NativeArray<int>(height.Length, Allocator.TempJob);
57
58 for (var i = 0; i < buffers.Length; ++i)
59 {
60 job.m_Buffers[i] = new IntPtr(buffers[i].GetUnsafeReadOnlyPtr());
61 job.m_Width[i] = width[i];
62 job.m_Height[i] = height[i];
63 }
64
65 job.m_Output = new NativeArray<RectInt>(buffers.Length, Allocator.TempJob);
66
67 // Ensure all jobs are completed before we return since we don't own the buffers
68 job.Schedule(buffers.Length, 1).Complete();
69 var rects = job.m_Output.ToArray();
70 job.m_Output.Dispose();
71 return rects;
72 }
73 }
74}