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using System;
using System.Collections.Generic;
using UnityEngine.Rendering;
namespace UnityEngine.UI
{
/// <summary>
/// Dynamic material class makes it possible to create custom materials on the fly on a per-Graphic basis,
/// and still have them get cleaned up correctly.
/// </summary>
public static class StencilMaterial
{
private class MatEntry
{
public Material baseMat;
public Material customMat;
public int count;
public int stencilId;
public StencilOp operation = StencilOp.Keep;
public CompareFunction compareFunction = CompareFunction.Always;
public int readMask;
public int writeMask;
public bool useAlphaClip;
public ColorWriteMask colorMask;
}
private static List<MatEntry> m_List = new List<MatEntry>();
[Obsolete("Use Material.Add instead.", true)]
public static Material Add(Material baseMat, int stencilID) { return null; }
/// <summary>
/// Add a new material using the specified base and stencil ID.
/// </summary>
public static Material Add(Material baseMat, int stencilID, StencilOp operation, CompareFunction compareFunction, ColorWriteMask colorWriteMask)
{
return Add(baseMat, stencilID, operation, compareFunction, colorWriteMask, 255, 255);
}
/// <summary>
/// Add a new material using the specified base and stencil ID.
/// </summary>
public static Material Add(Material baseMat, int stencilID, StencilOp operation, CompareFunction compareFunction, ColorWriteMask colorWriteMask, int readMask, int writeMask)
{
if ((stencilID <= 0 && colorWriteMask == ColorWriteMask.All) || baseMat == null)
return baseMat;
if (!baseMat.HasProperty("_Stencil"))
{
Debug.LogWarning("Material " + baseMat.name + " doesn't have _Stencil property", baseMat);
return baseMat;
}
if (!baseMat.HasProperty("_StencilOp"))
{
Debug.LogWarning("Material " + baseMat.name + " doesn't have _StencilOp property", baseMat);
return baseMat;
}
if (!baseMat.HasProperty("_StencilComp"))
{
Debug.LogWarning("Material " + baseMat.name + " doesn't have _StencilComp property", baseMat);
return baseMat;
}
if (!baseMat.HasProperty("_StencilReadMask"))
{
Debug.LogWarning("Material " + baseMat.name + " doesn't have _StencilReadMask property", baseMat);
return baseMat;
}
if (!baseMat.HasProperty("_StencilWriteMask"))
{
Debug.LogWarning("Material " + baseMat.name + " doesn't have _StencilWriteMask property", baseMat);
return baseMat;
}
if (!baseMat.HasProperty("_ColorMask"))
{
Debug.LogWarning("Material " + baseMat.name + " doesn't have _ColorMask property", baseMat);
return baseMat;
}
for (int i = 0; i < m_List.Count; ++i)
{
MatEntry ent = m_List[i];
if (ent.baseMat == baseMat
&& ent.stencilId == stencilID
&& ent.operation == operation
&& ent.compareFunction == compareFunction
&& ent.readMask == readMask
&& ent.writeMask == writeMask
&& ent.colorMask == colorWriteMask)
{
++ent.count;
return ent.customMat;
}
}
var newEnt = new MatEntry();
newEnt.count = 1;
newEnt.baseMat = baseMat;
newEnt.customMat = new Material(baseMat);
newEnt.customMat.hideFlags = HideFlags.HideAndDontSave;
newEnt.stencilId = stencilID;
newEnt.operation = operation;
newEnt.compareFunction = compareFunction;
newEnt.readMask = readMask;
newEnt.writeMask = writeMask;
newEnt.colorMask = colorWriteMask;
newEnt.useAlphaClip = operation != StencilOp.Keep && writeMask > 0;
newEnt.customMat.name = string.Format("Stencil Id:{0}, Op:{1}, Comp:{2}, WriteMask:{3}, ReadMask:{4}, ColorMask:{5} AlphaClip:{6} ({7})", stencilID, operation, compareFunction, writeMask, readMask, colorWriteMask, newEnt.useAlphaClip, baseMat.name);
newEnt.customMat.SetInt("_Stencil", stencilID);
newEnt.customMat.SetInt("_StencilOp", (int)operation);
newEnt.customMat.SetInt("_StencilComp", (int)compareFunction);
newEnt.customMat.SetInt("_StencilReadMask", readMask);
newEnt.customMat.SetInt("_StencilWriteMask", writeMask);
newEnt.customMat.SetInt("_ColorMask", (int)colorWriteMask);
// left for backwards compatability
if (newEnt.customMat.HasProperty("_UseAlphaClip"))
newEnt.customMat.SetInt("_UseAlphaClip", newEnt.useAlphaClip ? 1 : 0);
if (newEnt.useAlphaClip)
newEnt.customMat.EnableKeyword("UNITY_UI_ALPHACLIP");
else
newEnt.customMat.DisableKeyword("UNITY_UI_ALPHACLIP");
m_List.Add(newEnt);
return newEnt.customMat;
}
/// <summary>
/// Remove an existing material, automatically cleaning it up if it's no longer in use.
/// </summary>
public static void Remove(Material customMat)
{
if (customMat == null)
return;
for (int i = 0; i < m_List.Count; ++i)
{
MatEntry ent = m_List[i];
if (ent.customMat != customMat)
continue;
if (--ent.count == 0)
{
Misc.DestroyImmediate(ent.customMat);
ent.baseMat = null;
m_List.RemoveAt(i);
}
return;
}
}
public static void ClearAll()
{
for (int i = 0; i < m_List.Count; ++i)
{
MatEntry ent = m_List[i];
Misc.DestroyImmediate(ent.customMat);
ent.baseMat = null;
}
m_List.Clear();
}
}
}
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