示例#1
0
        internal void ApplyState(GraphicsDevice device)
        {
            GL.Enable(EnableCap.Blend);
            GraphicsExtensions.CheckGLError();

            // Set blending mode
            var blendMode = ColorBlendFunction.GetBlendEquationMode();

            GL.BlendEquation(blendMode);
            GraphicsExtensions.CheckGLError();

            // Set blending function
            var bfs = ColorSourceBlend.GetBlendFactorSrc();
            var bfd = ColorDestinationBlend.GetBlendFactorDest();

#if IPHONE
            GL.BlendFunc((All)bfs, (All)bfd);
#else
            GL.BlendFunc(bfs, bfd);
#endif
            GraphicsExtensions.CheckGLError();
        }
示例#2
0
        internal void PlatformApplyState(GraphicsDevice device, bool force = false)
        {
            var blendEnabled =
                !(ColorSourceBlend == Blend.One &&
                  ColorDestinationBlend == Blend.Zero &&
                  AlphaSourceBlend == Blend.One &&
                  AlphaDestinationBlend == Blend.Zero);

            if (force || blendEnabled != device._lastBlendEnable)
            {
                if (blendEnabled)
                {
                    GL.Enable(EnableCap.Blend);
                }
                else
                {
                    GL.Disable(EnableCap.Blend);
                }
                GL.CheckError();

                device._lastBlendEnable = blendEnabled;
            }
            if (_independentBlendEnable)
            {
                for (int i = 0; i < 4; i++)
                {
                    if (force ||
                        _targetBlendState[i].ColorBlendFunction != device._lastBlendState[i].ColorBlendFunction ||
                        _targetBlendState[i].AlphaBlendFunction != device._lastBlendState[i].AlphaBlendFunction)
                    {
                        GL.BlendEquationSeparatei(i,
                                                  _targetBlendState[i].ColorBlendFunction.GetBlendEquationMode(),
                                                  _targetBlendState[i].AlphaBlendFunction.GetBlendEquationMode());
                        GL.CheckError();

                        device._lastBlendState[i].ColorBlendFunction = _targetBlendState[i].ColorBlendFunction;
                        device._lastBlendState[i].AlphaBlendFunction = _targetBlendState[i].AlphaBlendFunction;
                    }

                    if (force ||
                        _targetBlendState[i].ColorSourceBlend != device._lastBlendState[i].ColorSourceBlend ||
                        _targetBlendState[i].ColorDestinationBlend != device._lastBlendState[i].ColorDestinationBlend ||
                        _targetBlendState[i].AlphaSourceBlend != device._lastBlendState[i].AlphaSourceBlend ||
                        _targetBlendState[i].AlphaDestinationBlend != device._lastBlendState[i].AlphaDestinationBlend)
                    {
                        GL.BlendFuncSeparatei(i,
                                              _targetBlendState[i].ColorSourceBlend.GetBlendFactorSrc(),
                                              _targetBlendState[i].ColorDestinationBlend.GetBlendFactorDest(),
                                              _targetBlendState[i].AlphaSourceBlend.GetBlendFactorSrc(),
                                              _targetBlendState[i].AlphaDestinationBlend.GetBlendFactorDest());
                        GL.CheckError();

                        device._lastBlendState[i].ColorSourceBlend      = _targetBlendState[i].ColorSourceBlend;
                        device._lastBlendState[i].ColorDestinationBlend = _targetBlendState[i].ColorDestinationBlend;
                        device._lastBlendState[i].AlphaSourceBlend      = _targetBlendState[i].AlphaSourceBlend;
                        device._lastBlendState[i].AlphaDestinationBlend = _targetBlendState[i].AlphaDestinationBlend;
                    }
                }
            }
            else
            {
                if (force ||
                    ColorBlendFunction != device._lastBlendState.ColorBlendFunction ||
                    AlphaBlendFunction != device._lastBlendState.AlphaBlendFunction)
                {
                    GL.BlendEquationSeparate(
                        ColorBlendFunction.GetBlendEquationMode(),
                        AlphaBlendFunction.GetBlendEquationMode());
                    GL.CheckError();

                    for (int i = 0; i < 4; i++)
                    {
                        device._lastBlendState[i].ColorBlendFunction = ColorBlendFunction;
                        device._lastBlendState[i].AlphaBlendFunction = AlphaBlendFunction;
                    }
                }

                if (force ||
                    ColorSourceBlend != device._lastBlendState.ColorSourceBlend ||
                    ColorDestinationBlend != device._lastBlendState.ColorDestinationBlend ||
                    AlphaSourceBlend != device._lastBlendState.AlphaSourceBlend ||
                    AlphaDestinationBlend != device._lastBlendState.AlphaDestinationBlend)
                {
                    GL.BlendFuncSeparate(
                        ColorSourceBlend.GetBlendFactorSrc(),
                        ColorDestinationBlend.GetBlendFactorDest(),
                        AlphaSourceBlend.GetBlendFactorSrc(),
                        AlphaDestinationBlend.GetBlendFactorDest());
                    GL.CheckError();

                    for (int i = 0; i < 4; i++)
                    {
                        device._lastBlendState[i].ColorSourceBlend      = ColorSourceBlend;
                        device._lastBlendState[i].ColorDestinationBlend = ColorDestinationBlend;
                        device._lastBlendState[i].AlphaSourceBlend      = AlphaSourceBlend;
                        device._lastBlendState[i].AlphaDestinationBlend = AlphaDestinationBlend;
                    }
                }
            }

            if (force || ColorWriteChannels != device._lastBlendState.ColorWriteChannels)
            {
                GL.ColorMask(
                    (ColorWriteChannels & ColorWriteChannels.Red) != 0,
                    (ColorWriteChannels & ColorWriteChannels.Green) != 0,
                    (ColorWriteChannels & ColorWriteChannels.Blue) != 0,
                    (ColorWriteChannels & ColorWriteChannels.Alpha) != 0);
                GL.CheckError();

                device._lastBlendState.ColorWriteChannels = ColorWriteChannels;
            }
        }