320 lines
11 KiB
C#
320 lines
11 KiB
C#
using System;
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using System.Collections.Generic;
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using UnityEngine;
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using FairyGUI.Utils;
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namespace FairyGUI
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{
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/// <summary>
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/// UpdateContext is for internal use.
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/// </summary>
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public class UpdateContext
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{
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public struct ClipInfo
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{
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public Rect rect;
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public Vector4 clipBox;
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public bool soft;
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public Vector4 softness;//left-top-right-bottom
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public uint clipId;
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public int rectMaskDepth;
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public int referenceValue;
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public bool reversed;
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}
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Stack<ClipInfo> _clipStack;
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public bool clipped;
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public ClipInfo clipInfo;
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public int renderingOrder;
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public int batchingDepth;
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public int rectMaskDepth;
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public int stencilReferenceValue;
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public int stencilCompareValue;
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public float alpha;
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public bool grayed;
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public static UpdateContext current;
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public static bool working;
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public static event Action OnBegin;
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public static event Action OnEnd;
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static Action _tmpBegin;
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public UpdateContext()
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{
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_clipStack = new Stack<ClipInfo>();
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}
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/// <summary>
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///
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/// </summary>
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public void Begin()
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{
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current = this;
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renderingOrder = 0;
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batchingDepth = 0;
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rectMaskDepth = 0;
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stencilReferenceValue = 0;
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alpha = 1;
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grayed = false;
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clipped = false;
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_clipStack.Clear();
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Stats.ObjectCount = 0;
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Stats.GraphicsCount = 0;
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_tmpBegin = OnBegin;
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OnBegin = null;
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//允许OnBegin里再次Add，这里没有做死锁检查
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while (_tmpBegin != null)
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{
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_tmpBegin.Invoke();
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_tmpBegin = OnBegin;
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OnBegin = null;
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}
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working = true;
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}
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/// <summary>
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///
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/// </summary>
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public void End()
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{
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working = false;
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if (OnEnd != null)
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OnEnd.Invoke();
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OnEnd = null;
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="clipId"></param>
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/// <param name="clipRect"></param>
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/// <param name="softness"></param>
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public void EnterClipping(uint clipId, Rect clipRect, Vector4? softness)
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{
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_clipStack.Push(clipInfo);
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if (rectMaskDepth > 0)
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clipRect = ToolSet.Intersection(ref clipInfo.rect, ref clipRect);
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clipped = true;
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clipInfo.rectMaskDepth = ++rectMaskDepth;
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/* clipPos = xy * clipBox.zw + clipBox.xy
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* 利用这个公式，使clipPos变为当前顶点距离剪切区域中心的距离值，剪切区域的大小为2x2
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* 那么abs(clipPos)>1的都是在剪切区域外
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*/
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clipInfo.rect = clipRect;
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clipRect.x = clipRect.x + clipRect.width * 0.5f;
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clipRect.y = clipRect.y + clipRect.height * 0.5f;
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clipRect.width *= 0.5f;
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clipRect.height *= 0.5f;
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if (clipRect.width == 0 || clipRect.height == 0)
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clipInfo.clipBox = new Vector4(-2, -2, 0, 0);
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else
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clipInfo.clipBox = new Vector4(-clipRect.x / clipRect.width, -clipRect.y / clipRect.height,
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1.0f / clipRect.width, 1.0f / clipRect.height);
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clipInfo.clipId = clipId;
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clipInfo.soft = softness != null;
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if (clipInfo.soft)
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{
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clipInfo.softness = (Vector4)softness;
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float vx = clipInfo.rect.width * Screen.height * 0.25f;
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float vy = clipInfo.rect.height * Screen.height * 0.25f;
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if (clipInfo.softness.x > 0)
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clipInfo.softness.x = vx / clipInfo.softness.x;
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else
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clipInfo.softness.x = 10000f;
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if (clipInfo.softness.y > 0)
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clipInfo.softness.y = vy / clipInfo.softness.y;
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else
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clipInfo.softness.y = 10000f;
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if (clipInfo.softness.z > 0)
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clipInfo.softness.z = vx / clipInfo.softness.z;
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else
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clipInfo.softness.z = 10000f;
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if (clipInfo.softness.w > 0)
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clipInfo.softness.w = vy / clipInfo.softness.w;
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else
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clipInfo.softness.w = 10000f;
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}
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="clipId"></param>
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/// <param name="reversedMask"></param>
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public void EnterClipping(uint clipId, bool reversedMask)
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{
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_clipStack.Push(clipInfo);
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if (stencilReferenceValue == 0)
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stencilReferenceValue = 1;
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else
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stencilReferenceValue = stencilReferenceValue << 1;
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if (reversedMask)
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{
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if (clipInfo.reversed)
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stencilCompareValue = (stencilReferenceValue >> 1) - 1;
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else
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stencilCompareValue = stencilReferenceValue - 1;
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}
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else
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stencilCompareValue = (stencilReferenceValue << 1) - 1;
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clipInfo.clipId = clipId;
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clipInfo.referenceValue = stencilReferenceValue;
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clipInfo.reversed = reversedMask;
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clipped = true;
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}
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/// <summary>
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///
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/// </summary>
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public void LeaveClipping()
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{
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clipInfo = _clipStack.Pop();
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stencilReferenceValue = clipInfo.referenceValue;
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rectMaskDepth = clipInfo.rectMaskDepth;
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clipped = stencilReferenceValue != 0 || rectMaskDepth != 0;
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}
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public void EnterPaintingMode()
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{
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//Reset clipping
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_clipStack.Push(clipInfo);
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clipInfo.rectMaskDepth = 0;
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clipInfo.referenceValue = 0;
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clipInfo.reversed = false;
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clipped = false;
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}
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public void LeavePaintingMode()
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{
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clipInfo = _clipStack.Pop();
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stencilReferenceValue = clipInfo.referenceValue;
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rectMaskDepth = clipInfo.rectMaskDepth;
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clipped = stencilReferenceValue != 0 || rectMaskDepth != 0;
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}
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public void ApplyClippingProperties(Material mat, bool isStdMaterial)
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{
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if (rectMaskDepth > 0) //在矩形剪裁下，且不是遮罩对象
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{
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mat.SetVector(ShaderConfig.ID_ClipBox, clipInfo.clipBox);
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if (clipInfo.soft)
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mat.SetVector(ShaderConfig.ID_ClipSoftness, clipInfo.softness);
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}
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if (stencilReferenceValue > 0)
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{
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mat.SetInt(ShaderConfig.ID_StencilComp, (int)UnityEngine.Rendering.CompareFunction.Equal);
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mat.SetInt(ShaderConfig.ID_Stencil, stencilCompareValue);
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mat.SetInt(ShaderConfig.ID_Stencil2, stencilCompareValue);
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mat.SetInt(ShaderConfig.ID_StencilOp, (int)UnityEngine.Rendering.StencilOp.Keep);
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mat.SetInt(ShaderConfig.ID_StencilReadMask, stencilReferenceValue | (stencilReferenceValue - 1));
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mat.SetInt(ShaderConfig.ID_ColorMask, 15);
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}
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else
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{
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mat.SetInt(ShaderConfig.ID_StencilComp, (int)UnityEngine.Rendering.CompareFunction.Always);
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mat.SetInt(ShaderConfig.ID_Stencil, 0);
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mat.SetInt(ShaderConfig.ID_Stencil2, 0);
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mat.SetInt(ShaderConfig.ID_StencilOp, (int)UnityEngine.Rendering.StencilOp.Keep);
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mat.SetInt(ShaderConfig.ID_StencilReadMask, 255);
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mat.SetInt(ShaderConfig.ID_ColorMask, 15);
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}
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if (!isStdMaterial)
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{
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if (rectMaskDepth > 0)
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{
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if (clipInfo.soft)
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mat.EnableKeyword("SOFT_CLIPPED");
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else
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mat.EnableKeyword("CLIPPED");
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}
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else
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{
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mat.DisableKeyword("CLIPPED");
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mat.DisableKeyword("SOFT_CLIPPED");
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}
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}
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}
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public void ApplyAlphaMaskProperties(Material mat, bool erasing)
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{
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if (!erasing)
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{
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if (stencilReferenceValue == 1)
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{
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mat.SetInt(ShaderConfig.ID_StencilComp, (int)UnityEngine.Rendering.CompareFunction.Always);
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mat.SetInt(ShaderConfig.ID_Stencil, 1);
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mat.SetInt(ShaderConfig.ID_StencilOp, (int)UnityEngine.Rendering.StencilOp.Replace);
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mat.SetInt(ShaderConfig.ID_StencilReadMask, 255);
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mat.SetInt(ShaderConfig.ID_ColorMask, 0);
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}
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else
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{
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if (stencilReferenceValue != 0 & _clipStack.Peek().reversed)
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mat.SetInt(ShaderConfig.ID_StencilComp, (int)UnityEngine.Rendering.CompareFunction.NotEqual);
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else
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mat.SetInt(ShaderConfig.ID_StencilComp, (int)UnityEngine.Rendering.CompareFunction.Equal);
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mat.SetInt(ShaderConfig.ID_Stencil, stencilReferenceValue | (stencilReferenceValue - 1));
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mat.SetInt(ShaderConfig.ID_StencilOp, (int)UnityEngine.Rendering.StencilOp.Replace);
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mat.SetInt(ShaderConfig.ID_StencilReadMask, stencilReferenceValue - 1);
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mat.SetInt(ShaderConfig.ID_ColorMask, 0);
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}
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}
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else
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{
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if (stencilReferenceValue != 0 & _clipStack.Peek().reversed)
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{
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int refValue = stencilReferenceValue | (stencilReferenceValue - 1);
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mat.SetInt(ShaderConfig.ID_StencilComp, (int)UnityEngine.Rendering.CompareFunction.Equal);
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mat.SetInt(ShaderConfig.ID_Stencil, refValue);
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mat.SetInt(ShaderConfig.ID_StencilOp, (int)UnityEngine.Rendering.StencilOp.Zero);
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mat.SetInt(ShaderConfig.ID_StencilReadMask, refValue);
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mat.SetInt(ShaderConfig.ID_ColorMask, 0);
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}
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else
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{
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int refValue = stencilReferenceValue - 1;
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mat.SetInt(ShaderConfig.ID_StencilComp, (int)UnityEngine.Rendering.CompareFunction.Equal);
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mat.SetInt(ShaderConfig.ID_Stencil, refValue);
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mat.SetInt(ShaderConfig.ID_StencilOp, (int)UnityEngine.Rendering.StencilOp.Replace);
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mat.SetInt(ShaderConfig.ID_StencilReadMask, refValue);
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mat.SetInt(ShaderConfig.ID_ColorMask, 0);
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}
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}
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}
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#if UNITY_2019_3_OR_NEWER
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[RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
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static void InitializeOnLoad()
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{
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OnBegin = null;
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OnEnd = null;
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}
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#endif
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}
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}
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