186 lines
11 KiB
Plaintext
186 lines
11 KiB
Plaintext
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€ Þ € € . € € y €Q Þ € € . € € Þ €X ! H €i ÿÿÿÿ" € 1 €1 €ÿÿÿÿ# @ Þ € € $ Q €j € % H €u ÿÿÿÿ& € 1 €1 €ÿÿÿÿ' @ Þ € € ( Q €j € ) PPtr<EditorExtension> m_FileID m_PathID PPtr<PrefabInstance> m_DefaultReferences m_Icon m_ExecutionOrder m_ClassName m_Namespace X X \ ày¯ ¸ ¬ IALá¥Nª.ú3ï~!o/ Packages/com.unity.ugui/Runtime/UI/Core/Mask.cs ày¯ MaskE using System;
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using UnityEngine;
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using UnityEngine.EventSystems;
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using UnityEngine.Rendering;
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using UnityEngine.Serialization;
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namespace UnityEngine.UI
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{
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[AddComponentMenu("UI/Mask", 13)]
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[ExecuteAlways]
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[RequireComponent(typeof(RectTransform))]
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[DisallowMultipleComponent]
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/// <summary>
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/// A component for masking children elements.
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/// </summary>
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/// <remarks>
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/// By using this element any children elements that have masking enabled will mask where a sibling Graphic would write 0 to the stencil buffer.
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/// </remarks>
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public class Mask : UIBehaviour, ICanvasRaycastFilter, IMaterialModifier
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{
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[NonSerialized]
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private RectTransform m_RectTransform;
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public RectTransform rectTransform
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{
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get { return m_RectTransform ?? (m_RectTransform = GetComponent<RectTransform>()); }
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}
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[SerializeField]
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private bool m_ShowMaskGraphic = true;
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/// <summary>
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/// Show the graphic that is associated with the Mask render area.
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/// </summary>
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public bool showMaskGraphic
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{
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get { return m_ShowMaskGraphic; }
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set
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{
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if (m_ShowMaskGraphic == value)
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return;
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m_ShowMaskGraphic = value;
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if (graphic != null)
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graphic.SetMaterialDirty();
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}
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}
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[NonSerialized]
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private Graphic m_Graphic;
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/// <summary>
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/// The graphic associated with the Mask.
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/// </summary>
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public Graphic graphic
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{
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get { return m_Graphic ?? (m_Graphic = GetComponent<Graphic>()); }
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}
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[NonSerialized]
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private Material m_MaskMaterial;
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[NonSerialized]
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private Material m_UnmaskMaterial;
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protected Mask()
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{}
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public virtual bool MaskEnabled() { return IsActive() && graphic != null; }
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[Obsolete("Not used anymore.")]
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public virtual void OnSiblingGraphicEnabledDisabled() {}
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protected override void OnEnable()
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{
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base.OnEnable();
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if (graphic != null)
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{
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graphic.canvasRenderer.hasPopInstruction = true;
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graphic.SetMaterialDirty();
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}
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MaskUtilities.NotifyStencilStateChanged(this);
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}
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protected override void OnDisable()
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{
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// we call base OnDisable first here
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// as we need to have the IsActive return the
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// correct value when we notify the children
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// that the mask state has changed.
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base.OnDisable();
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if (graphic != null)
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{
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graphic.SetMaterialDirty();
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graphic.canvasRenderer.hasPopInstruction = false;
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graphic.canvasRenderer.popMaterialCount = 0;
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}
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StencilMaterial.Remove(m_MaskMaterial);
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m_MaskMaterial = null;
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StencilMaterial.Remove(m_UnmaskMaterial);
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m_UnmaskMaterial = null;
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MaskUtilities.NotifyStencilStateChanged(this);
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}
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#if UNITY_EDITOR
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protected override void OnValidate()
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{
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base.OnValidate();
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if (!IsActive())
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return;
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if (graphic != null)
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graphic.SetMaterialDirty();
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MaskUtilities.NotifyStencilStateChanged(this);
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}
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#endif
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public virtual bool IsRaycastLocationValid(Vector2 sp, Camera eventCamera)
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{
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if (!isActiveAndEnabled)
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return true;
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return RectTransformUtility.RectangleContainsScreenPoint(rectTransform, sp, eventCamera);
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}
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/// Stencil calculation time!
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public virtual Material GetModifiedMaterial(Material baseMaterial)
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{
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if (!MaskEnabled())
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return baseMaterial;
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var rootSortCanvas = MaskUtilities.FindRootSortOverrideCanvas(transform);
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var stencilDepth = MaskUtilities.GetStencilDepth(transform, rootSortCanvas);
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if (stencilDepth >= 8)
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{
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Debug.LogWarning("Attempting to use a stencil mask with depth > 8", gameObject);
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return baseMaterial;
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}
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int desiredStencilBit = 1 << stencilDepth;
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// if we are at the first level...
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// we want to destroy what is there
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if (desiredStencilBit == 1)
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{
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var maskMaterial = StencilMaterial.Add(baseMaterial, 1, StencilOp.Replace, CompareFunction.Always, m_ShowMaskGraphic ? ColorWriteMask.All : 0);
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StencilMaterial.Remove(m_MaskMaterial);
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m_MaskMaterial = maskMaterial;
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var unmaskMaterial = StencilMaterial.Add(baseMaterial, 1, StencilOp.Zero, CompareFunction.Always, 0);
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StencilMaterial.Remove(m_UnmaskMaterial);
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m_UnmaskMaterial = unmaskMaterial;
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graphic.canvasRenderer.popMaterialCount = 1;
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graphic.canvasRenderer.SetPopMaterial(m_UnmaskMaterial, 0);
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return m_MaskMaterial;
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}
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//otherwise we need to be a bit smarter and set some read / write masks
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var maskMaterial2 = StencilMaterial.Add(baseMaterial, desiredStencilBit | (desiredStencilBit - 1), StencilOp.Replace, CompareFunction.Equal, m_ShowMaskGraphic ? ColorWriteMask.All : 0, desiredStencilBit - 1, desiredStencilBit | (desiredStencilBit - 1));
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StencilMaterial.Remove(m_MaskMaterial);
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m_MaskMaterial = maskMaterial2;
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graphic.canvasRenderer.hasPopInstruction = true;
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var unmaskMaterial2 = StencilMaterial.Add(baseMaterial, desiredStencilBit - 1, StencilOp.Replace, CompareFunction.Equal, 0, desiredStencilBit - 1, desiredStencilBit | (desiredStencilBit - 1));
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StencilMaterial.Remove(m_UnmaskMaterial);
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m_UnmaskMaterial = unmaskMaterial2;
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graphic.canvasRenderer.popMaterialCount = 1;
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graphic.canvasRenderer.SetPopMaterial(m_UnmaskMaterial, 0);
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return m_MaskMaterial;
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