FairyGUI.NGraphics.UpdateMaterial C# (CSharp) Method

        public void UpdateMaterial(UpdateContext context)
        {
            Stats.GraphicsCount++;

            NMaterial nm = null;
            if (_manager != null && !_customMatarial)
            {
                nm = _manager.GetMaterial(this, context);
                _material = nm.material;
                if ((object)_material != (object)meshRenderer.sharedMaterial && (object)_material.mainTexture != null)
                    meshRenderer.sharedMaterial = _material;

                if (nm.combined)
                    _material.SetTexture("_AlphaTex", _manager.texture.alphaTexture.nativeTexture);
            }

            if (maskFrameId != 0 && maskFrameId != UpdateContext.frameId)
            {
                //曾经是遮罩对象，现在不是了
                if (_stencilEraser != null)
                    _stencilEraser.enabled = false;
            }

            if (_material != null)
            {
                if (blendMode != BlendMode.Normal) //GetMateria已经保证了不同的blendMode会返回不同的共享材质，所以这里可以放心设置
                    BlendModeUtils.Apply(_material, blendMode);

                bool clearStencil = false;
                if (context.clipped)
                {
                    if (maskFrameId != UpdateContext.frameId && context.rectMaskDepth > 0) //在矩形剪裁下，且不是遮罩对象
                    {
                        _material.SetVector("_ClipBox", context.clipInfo.clipBox);
                        if (context.clipInfo.soft)
                            _material.SetVector("_ClipSoftness", context.clipInfo.softness);
                    }

                    if (context.stencilReferenceValue > 0)
                    {
                        if (maskFrameId == UpdateContext.frameId) //是遮罩
                        {
                            if (context.stencilReferenceValue == 1)
                            {
                                _material.SetInt("_StencilComp", (int)UnityEngine.Rendering.CompareFunction.Always);
                                _material.SetInt("_Stencil", 1);
                                _material.SetInt("_StencilOp", (int)UnityEngine.Rendering.StencilOp.Replace);
                                _material.SetInt("_StencilReadMask", 255);
                                _material.SetInt("_ColorMask", 0);
                            }
                            else
                            {
                                _material.SetInt("_StencilComp", (int)UnityEngine.Rendering.CompareFunction.Equal);
                                _material.SetInt("_Stencil", context.stencilReferenceValue | (context.stencilReferenceValue - 1));
                                _material.SetInt("_StencilOp", (int)UnityEngine.Rendering.StencilOp.Replace);
                                _material.SetInt("_StencilReadMask", context.stencilReferenceValue - 1);
                                _material.SetInt("_ColorMask", 0);
                            }

                            //设置擦除stencil的drawcall
                            if (_stencilEraser == null)
                            {
                                _stencilEraser = new StencilEraser(gameObject.transform);
                                _stencilEraser.meshFilter.mesh = mesh;
                            }
                            else
                                _stencilEraser.enabled = true;

                            if (nm != null)
                            {
                                NMaterial eraserNm = _manager.GetMaterial(this, context);
                                eraserNm.stencilSet = true;
                                Material eraserMat = eraserNm.material;
                                if ((object)eraserMat != (object)_stencilEraser.meshRenderer.sharedMaterial)
                                    _stencilEraser.meshRenderer.sharedMaterial = eraserMat;

                                int refValue = context.stencilReferenceValue - 1;
                                eraserMat.SetInt("_StencilComp", (int)UnityEngine.Rendering.CompareFunction.Equal);
                                eraserMat.SetInt("_Stencil", refValue);
                                eraserMat.SetInt("_StencilOp", (int)UnityEngine.Rendering.StencilOp.Replace);
                                eraserMat.SetInt("_StencilReadMask", refValue);
                                eraserMat.SetInt("_ColorMask", 0);
                            }
                        }
                        else
                        {
                            int refValue = context.stencilReferenceValue | (context.stencilReferenceValue - 1);
                            _material.SetInt("_StencilComp", (int)UnityEngine.Rendering.CompareFunction.Equal);
                            _material.SetInt("_Stencil", refValue);
                            _material.SetInt("_StencilOp", (int)UnityEngine.Rendering.StencilOp.Keep);
                            _material.SetInt("_StencilReadMask", refValue);
                            _material.SetInt("_ColorMask", 15);
                        }
                        if (nm != null)
                            nm.stencilSet = true;
                    }
                    else
                        clearStencil = nm == null || nm.stencilSet;
                }
                else
                    clearStencil = nm == null || nm.stencilSet;

                if (clearStencil)
                {
                    _material.SetInt("_StencilComp", (int)UnityEngine.Rendering.CompareFunction.Always);
                    _material.SetInt("_Stencil", 0);
                    _material.SetInt("_StencilOp", (int)UnityEngine.Rendering.StencilOp.Keep);
                    _material.SetInt("_StencilReadMask", 255);
                    _material.SetInt("_ColorMask", 15);
                }
            }
        }

 static public int UpdateMaterial(IntPtr l)
 {
     try {
         FairyGUI.NGraphics     self = (FairyGUI.NGraphics)checkSelf(l);
         FairyGUI.UpdateContext a1;
         checkType(l, 2, out a1);
         self.UpdateMaterial(a1);
         pushValue(l, true);
         return(1);
     }
     catch (Exception e) {
         return(error(l, e));
     }
 }