Simplified More API (Sequence Length becomes abstract / Added Decimate Processor back

ImageSequencer/Editor/Serialization/ProcessorBase.cs

             processor.SetOutputSize(processor.InputSequence.width, processor.InputSequence.height);
         }
         public abstract bool OnInspectorGUI(bool changed, SerializedObject serializedObject);
-        public abstract bool OnCanvasGUI(ImageSequencerCanvas canvas);
+        public virtual bool OnCanvasGUI(ImageSequencerCanvas canvas)
+        {
+            return false;
+        }
         public abstract void Default();
     }
 }

ImageSequencer/Editor/Serialization/Processors/AssembleProcessor.cs

         public int FlipbookNumV;
         public AssembleMode Mode;
 
+        bool hasChanged = false;
+
         public override string shaderPath => "Packages/com.unity.vfx-toolbox/ImageSequencer/Editor/Shaders/AssembleBlit.shader";
 
         public override string processorName => "Assemble Flipbook";
             }
         }
 
+        public override int numU
+        {
+            get
+            {
+                switch (Mode)
+                {
+                    default:
+                    case AssembleMode.FullSpriteSheet:
+                        return FlipbookNumU * processor.InputSequence.numU;
+                    case AssembleMode.VerticalSequence:
+                        return processor.InputSequence.numU;
+                }
+            }
+        }
+
+        public override int numV => FlipbookNumV * processor.InputSequence.numV;
+
+        public override int sequenceLength
+        {
+            get
+            {
+                switch (Mode)
+                {
+                    default:
+                    case AssembleMode.FullSpriteSheet:
+                        return 1;
+
+                    case AssembleMode.VerticalSequence:
+                        return processor.InputSequence.length / FlipbookNumV;
+                }
+            }
+        }
+
         public override void Default()
         {
             FlipbookNumU = 5;
             }
         }
 
-        public override int sequenceLength
-        {
-            get 
-            {
-                switch (Mode)
-                {
-                    default:
-                    case AssembleMode.FullSpriteSheet:
-                        return 1;
-
-                    case AssembleMode.VerticalSequence:
-                        return processor.InputSequence.length / FlipbookNumV;
-                }
-            }
-        }
-
-
         public override bool OnCanvasGUI(ImageSequencerCanvas canvas)
         {
             if (Event.current.type != EventType.Repaint)
             GUI.color = Color.white;
             return false;
         }
-
-        public override int numU
-        {
-            get
-            {
-                switch (Mode)
-                {
-                    default:
-                    case AssembleMode.FullSpriteSheet:
-                        return FlipbookNumU * processor.InputSequence.numU;
-                    case AssembleMode.VerticalSequence:
-                        return processor.InputSequence.numU;
-                }
-            }
-        }
-
-        public override int numV => FlipbookNumV * processor.InputSequence.numV;
 
         public override bool Process(int frame)
         {
 
             return true;
         }
-
-        bool hasChanged = false;
 
         public override bool OnInspectorGUI(bool changed, SerializedObject serializedObject)
         {

ImageSequencer/Editor/Serialization/Processors/BreakFlipbookProcessor.cs

 
         public override int sequenceLength => Mathf.Min(FlipbookNumU, processor.InputSequence.width) * Mathf.Min(FlipbookNumV, processor.InputSequence.height);
 
-        public override bool OnCanvasGUI(ImageSequencerCanvas canvas)
-        {
-            return false;
-        }
-
         public override bool Process(int frame)
         {
             Texture texture = processor.InputSequence.RequestFrame(0).texture;

ImageSequencer/Editor/Serialization/Processors/DecimateProcessor.cs

+using UnityEngine;
+
+namespace UnityEditor.VFXToolbox.ImageSequencer
+{
+    [Processor("Sequence","Decimate")]
+    internal class DecimateProcessor : ProcessorBase
+    {
+        public ushort DecimateBy;
+
+        public override string shaderPath => "Packages/com.unity.vfx-toolbox/ImageSequencer/Editor/Shaders/Null.shader";
+
+        public override string label => $"{name} (1 of {DecimateBy})";
+
+        public override string processorName => "Decimate";
+
+        public override int sequenceLength => Mathf.Max(1, (int)Mathf.Floor((float)processor.InputSequence.length / DecimateBy));
+
+        public override void Default()
+        {
+            DecimateBy = 3;
+        }
+
+        public override bool OnInspectorGUI(bool changed, SerializedObject serializedObject)
+        {
+            var decimateBy = serializedObject.FindProperty("DecimateBy");
+
+            EditorGUI.BeginChangeCheck();
+
+            int newDecimate = Mathf.Clamp(EditorGUILayout.IntField(VFXToolboxGUIUtility.Get("Decimate by"), (int)DecimateBy), 2, processor.InputSequence.length);
+
+            if (newDecimate != decimateBy.intValue)
+            {
+                decimateBy.intValue = newDecimate;
+            }
+
+            if (EditorGUI.EndChangeCheck())
+            {
+                changed = true;
+            }
+
+            return changed;
+        }
+
+        public override bool Process(int frame)
+        {
+            int targetFrame = frame * DecimateBy;
+            Texture texture = processor.InputSequence.RequestFrame(targetFrame).texture;
+            processor.material.SetTexture("_MainTex", texture);
+            processor.ExecuteShaderAndDump(frame, texture);
+            return true;
+        }
+    }
+}
+
+

ImageSequencer/Editor/Serialization/Processors/DecimateProcessor.cs.meta

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