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();
}
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;
}
}
