FairyGUI.BlendModeUtils.Apply C# (CSharp) Method

        public static void Apply(Material mat, BlendMode blendMode)
        {
            int index = (int)blendMode * 2;
            mat.SetFloat("_BlendSrcFactor", Factors[index]);
            mat.SetFloat("_BlendDstFactor", Factors[index + 1]);
        }

        public void UpdateMaterial(UpdateContext context)
        {
            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);
                }

                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 if (nm != null && nm.stencilSet)
                    {
                        _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);

                        nm.stencilSet = false;
                    }
                    else
                    {
                        _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);
                    }
                }
            }
        }