public BlendOperation( BlendOperator op, BlendParameter sourceParam, BlendParameter destParam )
: this()
{
Operator = op;
SourceParameter = sourceParam;
DestinationParameter = destParam;
}
private int ConvertBlendOp( BlendOperator blendOperator )
{
switch ( blendOperator )
{
case BlendOperator.Add: return ( int ) SharpDX.Direct3D9.BlendOperation.Add;
case BlendOperator.Minimum: return ( int ) SharpDX.Direct3D9.BlendOperation.Minimum;
case BlendOperator.Maximum: return ( int ) SharpDX.Direct3D9.BlendOperation.Maximum;
case BlendOperator.Subtract: return ( int ) SharpDX.Direct3D9.BlendOperation.Subtract;
case BlendOperator.ReverseSubtract: return ( int ) SharpDX.Direct3D9.BlendOperation.ReverseSubtract;
default: throw new ArgumentException ();
}
}
private static void SetOperator(BlendOperator blendOperator)
{
switch (blendOperator)
{
case BlendOperator.None: GL.Disable(EnableCap.Blend); return;
case BlendOperator.Add: GL.BlendEquation(BlendEquationMode.FuncAdd); break;
case BlendOperator.Max: GL.BlendEquation(BlendEquationMode.Max); break;
case BlendOperator.Min: GL.BlendEquation(BlendEquationMode.Min); break;
case BlendOperator.ReverseSubtract: GL.BlendEquation(BlendEquationMode.FuncReverseSubtract); break;
case BlendOperator.Subtract: GL.BlendEquation(BlendEquationMode.FuncSubtract); break;
default: throw new ArgumentOutOfRangeException(blendOperator.ToString());
}
GL.Enable(EnableCap.Blend);
}
/// <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.BlendEquationMode MistyValueToOriginal( BlendOperator op )
{
switch ( op )
{
case BlendOperator.Minimum: return OpenTK.Graphics.OpenGL.BlendEquationMode.Min;
case BlendOperator.Maximum: return OpenTK.Graphics.OpenGL.BlendEquationMode.Max;
case BlendOperator.Add: return OpenTK.Graphics.OpenGL.BlendEquationMode.FuncAdd;
case BlendOperator.Subtract: return OpenTK.Graphics.OpenGL.BlendEquationMode.FuncSubtract;
case BlendOperator.ReverseSubtract: return OpenTK.Graphics.OpenGL.BlendEquationMode.FuncReverseSubtract;
default: throw new ArgumentException ();
}
}
