1 files changed, 170 insertions, 0 deletions
diff --git a/Assets/Scripts/UIHsvModifier.cs b/Assets/Scripts/UIHsvModifier.cs
new file mode 100644
index 0000000..8445bb7
--- /dev/null
+++ b/Assets/Scripts/UIHsvModifier.cs
@@ -0,0 +1,170 @@
+using System;
+using UnityEngine;
+using UnityEngine.Serialization;
+using UnityEngine.UI;
+
+
+namespace Coffee.UIEffects
+{
+    /// <summary>
+    /// HSV Modifier.
+    /// </summary>
+    [AddComponentMenu("UI/UIEffects/UIHsvModifier", 4)]
+    public class UIHsvModifier : BaseMaterialEffect
+    {
+        private const uint k_ShaderId = 6 << 3;
+        private static readonly ParameterTexture s_ParamTex = new ParameterTexture(7, 128, "_ParamTex");
+
+        [Header("Target")] [Tooltip("Target color to affect hsv shift.")] [SerializeField] [ColorUsage(false)]
+        Color m_TargetColor = Color.red;
+
+        [Tooltip("Color range to affect hsv shift [0 ~ 1].")] [SerializeField] [Range(0, 1)]
+        float m_Range = 0.1f;
+
+        [Header("Adjustment")] [Tooltip("Hue shift [-0.5 ~ 0.5].")] [SerializeField] [Range(-0.5f, 0.5f)]
+        float m_Hue;
+
+        [Tooltip("Saturation shift [-0.5 ~ 0.5].")] [SerializeField] [Range(-0.5f, 0.5f)]
+        float m_Saturation;
+
+        [Tooltip("Value shift [-0.5 ~ 0.5].")] [SerializeField] [Range(-0.5f, 0.5f)]
+        float m_Value;
+
+        /// <summary>
+        /// Target color to affect hsv shift.
+        /// </summary>
+        public Color targetColor
+        {
+            get { return m_TargetColor; }
+            set
+            {
+                if (m_TargetColor == value) return;
+                m_TargetColor = value;
+                SetEffectParamsDirty();
+            }
+        }
+
+        /// <summary>
+        /// Color range to affect hsv shift [0 ~ 1].
+        /// </summary>
+        public float range
+        {
+            get { return m_Range; }
+            set
+            {
+                value = Mathf.Clamp(value, 0, 1);
+                if (Mathf.Approximately(m_Range, value)) return;
+                m_Range = value;
+                SetEffectParamsDirty();
+            }
+        }
+
+        /// <summary>
+        /// Saturation shift [-0.5 ~ 0.5].
+        /// </summary>
+        public float saturation
+        {
+            get { return m_Saturation; }
+            set
+            {
+                value = Mathf.Clamp(value, -0.5f, 0.5f);
+                if (Mathf.Approximately(m_Saturation, value)) return;
+                m_Saturation = value;
+                SetEffectParamsDirty();
+            }
+        }
+
+        /// <summary>
+        /// Value shift [-0.5 ~ 0.5].
+        /// </summary>
+        public float value
+        {
+            get { return m_Value; }
+            set
+            {
+                value = Mathf.Clamp(value, -0.5f, 0.5f);
+                if (Mathf.Approximately(m_Value, value)) return;
+                m_Value = value;
+                SetEffectParamsDirty();
+            }
+        }
+
+        /// <summary>
+        /// Hue shift [-0.5 ~ 0.5].
+        /// </summary>
+        public float hue
+        {
+            get { return m_Hue; }
+            set
+            {
+                value = Mathf.Clamp(value, -0.5f, 0.5f);
+                if (Mathf.Approximately(m_Hue, value)) return;
+                m_Hue = value;
+                SetEffectParamsDirty();
+            }
+        }
+
+        /// <summary>
+        /// Gets the parameter texture.
+        /// </summary>
+        public override ParameterTexture paramTex
+        {
+            get { return s_ParamTex; }
+        }
+
+        public override Hash128 GetMaterialHash(Material material)
+        {
+            if (!isActiveAndEnabled || !material || !material.shader)
+                return k_InvalidHash;
+
+            return new Hash128(
+                (uint) material.GetInstanceID(),
+                k_ShaderId,
+                0,
+                0
+            );
+        }
+
+        public override void ModifyMaterial(Material newMaterial, Graphic graphic)
+        {
+            var connector = GraphicConnector.FindConnector(graphic);
+
+            newMaterial.shader = Shader.Find(string.Format("Hidden/{0} (UIHsvModifier)", newMaterial.shader.name));
+            paramTex.RegisterMaterial(newMaterial);
+        }
+
+        public override void ModifyMesh(VertexHelper vh, Graphic graphic)
+        {
+            if (!isActiveAndEnabled)
+                return;
+
+            var normalizedIndex = paramTex.GetNormalizedIndex(this);
+            var vertex = default(UIVertex);
+            var count = vh.currentVertCount;
+            for (var i = 0; i < count; i++)
+            {
+                vh.PopulateUIVertex(ref vertex, i);
+
+                vertex.uv0 = new Vector2(
+                    Packer.ToFloat(vertex.uv0.x, vertex.uv0.y),
+                    normalizedIndex
+                );
+                vh.SetUIVertex(vertex, i);
+            }
+        }
+
+        protected override void SetEffectParamsDirty()
+        {
+            float h, s, v;
+            Color.RGBToHSV(m_TargetColor, out h, out s, out v);
+
+            paramTex.SetData(this, 0, h); // param1.x : target hue
+            paramTex.SetData(this, 1, s); // param1.y : target saturation
+            paramTex.SetData(this, 2, v); // param1.z : target value
+            paramTex.SetData(this, 3, m_Range); // param1.w : target range
+            paramTex.SetData(this, 4, m_Hue + 0.5f); // param2.x : hue shift
+            paramTex.SetData(this, 5, m_Saturation + 0.5f); // param2.y : saturation shift
+            paramTex.SetData(this, 6, m_Value + 0.5f); // param2.z : value shift
+        }
+    }
+}