internal void PlatformApplyState(GraphicsDevice device, bool force = false)
{
var blendEnabled = !(this.ColorSourceBlend == Blend.One &&
this.ColorDestinationBlend == Blend.Zero &&
this.AlphaSourceBlend == Blend.One &&
this.AlphaDestinationBlend == Blend.Zero);
if (force || blendEnabled != device._lastBlendEnable)
{
if (blendEnabled)
{
GL.Enable(EnableCap.Blend);
}
else
{
GL.Disable(EnableCap.Blend);
}
GraphicsExtensions.CheckGLError();
device._lastBlendEnable = blendEnabled;
}
if (force || this.BlendFactor != device._lastBlendState.BlendFactor)
{
GL.BlendColor(
this.BlendFactor.R / 255.0f,
this.BlendFactor.G / 255.0f,
this.BlendFactor.B / 255.0f,
this.BlendFactor.A / 255.0f);
GraphicsExtensions.CheckGLError();
device._lastBlendState.BlendFactor = this.BlendFactor;
}
if (force ||
this.ColorBlendFunction != device._lastBlendState.ColorBlendFunction ||
this.AlphaBlendFunction != device._lastBlendState.AlphaBlendFunction)
{
GL.BlendEquationSeparate(
this.ColorBlendFunction.GetBlendEquationMode(),
this.AlphaBlendFunction.GetBlendEquationMode());
GraphicsExtensions.CheckGLError();
device._lastBlendState.ColorBlendFunction = this.ColorBlendFunction;
device._lastBlendState.AlphaBlendFunction = this.AlphaBlendFunction;
}
if (force ||
this.ColorSourceBlend != device._lastBlendState.ColorSourceBlend ||
this.ColorDestinationBlend != device._lastBlendState.ColorDestinationBlend ||
this.AlphaSourceBlend != device._lastBlendState.AlphaSourceBlend ||
this.AlphaDestinationBlend != device._lastBlendState.AlphaDestinationBlend)
{
GL.BlendFuncSeparate(
this.ColorSourceBlend.GetBlendFactorSrc(),
this.ColorDestinationBlend.GetBlendFactorDest(),
this.AlphaSourceBlend.GetBlendFactorSrc(),
this.AlphaDestinationBlend.GetBlendFactorDest());
GraphicsExtensions.CheckGLError();
device._lastBlendState.ColorSourceBlend = this.ColorSourceBlend;
device._lastBlendState.ColorDestinationBlend = this.ColorDestinationBlend;
device._lastBlendState.AlphaSourceBlend = this.AlphaSourceBlend;
device._lastBlendState.AlphaDestinationBlend = this.AlphaDestinationBlend;
}
if (force || this.ColorWriteChannels != device._lastBlendState.ColorWriteChannels)
{
GL.ColorMask(
(this.ColorWriteChannels & ColorWriteChannels.Red) != 0,
(this.ColorWriteChannels & ColorWriteChannels.Green) != 0,
(this.ColorWriteChannels & ColorWriteChannels.Blue) != 0,
(this.ColorWriteChannels & ColorWriteChannels.Alpha) != 0);
GraphicsExtensions.CheckGLError();
device._lastBlendState.ColorWriteChannels = this.ColorWriteChannels;
}
}