private static BlendingFactorSrc ConvertSource(BlendParameter param)
{
switch (param)
{
case BlendParameter.DestinationAlpha: return(BlendingFactorSrc.DstAlpha);
case BlendParameter.DestinationColor: return(BlendingFactorSrc.DstColor);
case BlendParameter.One: return(BlendingFactorSrc.One);
case BlendParameter.OneMinusDestinationAlpha: return(BlendingFactorSrc.OneMinusDstAlpha);
case BlendParameter.OneMinusDestinationColor: return(BlendingFactorSrc.OneMinusDstColor);
case BlendParameter.OneMinusSourceAlpha: return(BlendingFactorSrc.OneMinusSrcAlpha);
case BlendParameter.OneMinusSourceColor: return(BlendingFactorSrc.OneMinusSrcColor);
case BlendParameter.SourceAlpha: return(BlendingFactorSrc.SrcAlpha);
case BlendParameter.SourceAlphaSaturation: return(BlendingFactorSrc.SrcAlphaSaturate);
case BlendParameter.SourceColor: return(BlendingFactorSrc.SrcColor);
case BlendParameter.Zero: return(BlendingFactorSrc.Zero);
default: throw new ArgumentOutOfRangeException(param.ToString());
}
}
private static void SetFunction(BlendParameter source, BlendParameter destination)
{
var parameterSource = ConvertSource(source);
var parameterDestination = ConvertDestination(destination);
GL.BlendFunc(0, parameterSource, parameterDestination);
}
public BlendOperation( BlendOperator op, BlendParameter sourceParam, BlendParameter destParam )
: this()
{
Operator = op;
SourceParameter = sourceParam;
DestinationParameter = destParam;
}
private int ConvertBlendParam( BlendParameter blendParameter )
{
switch ( blendParameter )
{
case BlendParameter.Zero: return ( int ) SharpDX.Direct3D9.Blend.Zero;
case BlendParameter.One: return ( int ) SharpDX.Direct3D9.Blend.One;
case BlendParameter.SourceColor: return ( int ) SharpDX.Direct3D9.Blend.SourceColor;
case BlendParameter.SourceAlpha: return ( int ) SharpDX.Direct3D9.Blend.SourceAlpha;
case BlendParameter.DestinationColor: return ( int ) SharpDX.Direct3D9.Blend.DestinationColor;
case BlendParameter.DestinationAlpha: return ( int ) SharpDX.Direct3D9.Blend.DestinationAlpha;
case BlendParameter.InvertSourceColor: return ( int ) SharpDX.Direct3D9.Blend.InverseSourceColor;
case BlendParameter.InvertSourceAlpha: return ( int ) SharpDX.Direct3D9.Blend.InverseSourceAlpha;
case BlendParameter.InvertDestinationColor: return ( int ) SharpDX.Direct3D9.Blend.InverseDestinationColor;
case BlendParameter.InvertDestinationAlpha: return ( int ) SharpDX.Direct3D9.Blend.InverseDestinationAlpha;
default: throw new ArgumentException ();
}
}
/// <summary>
/// Initializes a new instance of the <see cref="BlendState"/> structure.
/// </summary>
/// <param name="blendOperator">The blend function operator.</param>
/// <param name="blendParameterSource">The source blend parameter.</param>
/// <param name="blendParameterDestination">The destination blend parameter.</param>
public BlendState(BlendOperator blendOperator, BlendParameter blendParameterSource, BlendParameter blendParameterDestination)
{
BlendOperator = blendOperator;
BlendParameterSource = blendParameterSource;
BlendParameterDestination = blendParameterDestination;
}
private OpenTK.Graphics.OpenGL.BlendingFactorSrc MistyValueToOriginal( BlendParameter param )
{
switch ( param )
{
case BlendParameter.Zero: return OpenTK.Graphics.OpenGL.BlendingFactorSrc.Zero;
case BlendParameter.One: return OpenTK.Graphics.OpenGL.BlendingFactorSrc.One;
case BlendParameter.SourceAlpha: return OpenTK.Graphics.OpenGL.BlendingFactorSrc.SrcAlpha;
case BlendParameter.InvertSourceAlpha: return OpenTK.Graphics.OpenGL.BlendingFactorSrc.OneMinusSrcAlpha;
case BlendParameter.DestinationColor: return OpenTK.Graphics.OpenGL.BlendingFactorSrc.DstColor;
case BlendParameter.DestinationAlpha: return OpenTK.Graphics.OpenGL.BlendingFactorSrc.DstAlpha;
case BlendParameter.InvertDestinationColor: return OpenTK.Graphics.OpenGL.BlendingFactorSrc.OneMinusDstColor;
case BlendParameter.InvertDestinationAlpha: return OpenTK.Graphics.OpenGL.BlendingFactorSrc.OneMinusDstAlpha;
default: throw new ArgumentException ();
}
}
