From 27339bdda46f4f826b4c5e2e0d471941221accf7 Mon Sep 17 00:00:00 2001
From: Stedd <toanpa+git@pm.me>
Date: Sun, 8 Oct 2023 00:56:53 +0200
Subject: [PATCH] colors are inverted on the result texture

---
 Assets/Scenes/SampleScene.unity      |  2 +-
 Assets/Scripts/ComputeController.cs  | 13 +++++++------
 Assets/Shaders/ColorInverter.compute | 13 ++++++-------
 3 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/Assets/Scenes/SampleScene.unity b/Assets/Scenes/SampleScene.unity
index 140cca6..66a9182 100644
--- a/Assets/Scenes/SampleScene.unity
+++ b/Assets/Scenes/SampleScene.unity
@@ -367,7 +367,7 @@ MonoBehaviour:
   m_Name: 
   m_EditorClassIdentifier: 
   _computeShader: {fileID: 7200000, guid: 3df3413c2fff3cc41a2eb5505b4c260c, type: 3}
-  _inputTexture: {fileID: 10305, guid: 0000000000000000f000000000000000, type: 0}
+  _inputTexture: {fileID: 10309, guid: 0000000000000000f000000000000000, type: 0}
   _resultTexture: {fileID: 0}
 --- !u!1 &963194225
 GameObject:
diff --git a/Assets/Scripts/ComputeController.cs b/Assets/Scripts/ComputeController.cs
index e24ad10..1e16f0d 100644
--- a/Assets/Scripts/ComputeController.cs
+++ b/Assets/Scripts/ComputeController.cs
@@ -1,10 +1,12 @@
 using UnityEngine;
+using UnityEngine.Serialization;
 
 public class ComputeController : MonoBehaviour
 {
     [SerializeField] private ComputeShader _computeShader;
     [SerializeField] private Texture2D _inputTexture;
     [SerializeField] private RenderTexture _resultTexture;
+
     private int _kernelHandle;
     private static readonly int Result = Shader.PropertyToID("result");
     private static readonly int SourceTexture = Shader.PropertyToID("source_texture");
@@ -13,11 +15,9 @@ public class ComputeController : MonoBehaviour
     {
         _kernelHandle = _computeShader.FindKernel("cs_main");
 
-        _resultTexture = new(100, 100, 24)
-        {
-            enableRandomWrite = true,
-            name = "Test"
-        };
+        _resultTexture = new(512, 512, 24);
+        _resultTexture.name = "ResultTexture";
+        _resultTexture.enableRandomWrite = true;
         _resultTexture.Create();
 
         _computeShader.SetTexture(_kernelHandle, Result, _resultTexture);
@@ -28,6 +28,7 @@ public class ComputeController : MonoBehaviour
 
     private void OnGUI()
     {
-        GUI.DrawTexture(new(0, 0, _resultTexture.width, _resultTexture.height), _resultTexture);
+        GUI.DrawTexture(new Rect(0, 0, _resultTexture.width, _resultTexture.height), _resultTexture);
+        GUI.DrawTexture(new Rect(0, 0, _inputTexture.width, _inputTexture.height), _inputTexture);
     }
 }
\ No newline at end of file
diff --git a/Assets/Shaders/ColorInverter.compute b/Assets/Shaders/ColorInverter.compute
index c850f9c..24e6371 100644
--- a/Assets/Shaders/ColorInverter.compute
+++ b/Assets/Shaders/ColorInverter.compute
@@ -1,17 +1,16 @@
-// Each #kernel tells which function to compile; you can have many kernels
 #pragma kernel cs_main
 
-// Create a RenderTexture with enableRandomWrite flag and set it
-// with cs.SetTexture
+// The output texture
 RWTexture2D<float4> result;
 
 // Input texture
 Texture2D<float4> source_texture;
 
-[numthreads(8,8,1)]
-void cs_main (uint3 id : SV_DispatchThreadID)
+[numthreads(8, 8, 1)]
+void cs_main(uint3 id : SV_DispatchThreadID)
 {
-    float4 color = result[id.xy];
-    color.rgb = 1 - color.rgb; // invert the color
+    float4 color = source_texture[id.xy];
+    color.rgb = 1 - color.rgb;
+    //color.rgb = float4(0, 1, 1, 0);
     result[id.xy] = color;
 }