private void ApplyStateCore(GraphicsContext ctx, ShaderProgram program, BlendState currentState)
{
if (Enabled)
{
// Enable blending
if (currentState.Enabled == false)
{
Gl.Enable(EnableCap.Blend);
}
// Set blending equation
if (ctx.Extensions.BlendMinmax_EXT)
{
if (EquationSeparated)
{
if (currentState.RgbEquation != RgbEquation || currentState.AlphaEquation != AlphaEquation)
{
Gl.BlendEquationSeparate(RgbEquation, AlphaEquation);
}
}
else
{
if (currentState.RgbEquation != RgbEquation)
{
Gl.BlendEquation(RgbEquation);
}
}
}
// Set blending function
if (FunctionSeparated)
{
if (currentState._RgbSrcFactor != _RgbSrcFactor || currentState._RgbDstFactor != _RgbDstFactor || currentState._AlphaSrcFactor != _AlphaSrcFactor || currentState._AlphaDstFactor != _AlphaDstFactor)
{
Gl.BlendFuncSeparate(_RgbSrcFactor, _RgbDstFactor, _AlphaSrcFactor, _AlphaDstFactor);
}
}
else
{
if (currentState._RgbSrcFactor != _RgbSrcFactor || currentState._RgbDstFactor != _RgbDstFactor)
{
Gl.BlendFunc(_RgbSrcFactor, _RgbDstFactor);
}
}
// Set blend color, if required
if (RequiresConstColor(_RgbSrcFactor) || RequiresConstColor(_AlphaSrcFactor) || RequiresConstColor(_RgbDstFactor) || RequiresConstColor(_AlphaDstFactor))
{
Gl.BlendColor(_BlendColor.r, _BlendColor.g, _BlendColor.b, _BlendColor.a);
}
}
else
{
// Disable blending
if (currentState.Enabled == true)
{
Gl.Disable(EnableCap.Blend);
}
}
}
/// <summary>
/// Set ShaderProgram state.
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> which has defined the shader program <paramref name="sProgram"/>.
/// </param>
/// <param name="sProgram">
/// The <see cref="ShaderProgram"/> which has the state set.
/// </param>
public override void ApplyState(GraphicsContext ctx, ShaderProgram sProgram)
{
if (ctx == null)
{
throw new ArgumentNullException("ctx");
}
BlendState currentState = null; // (BlendState)ctx.CurrentState[StateId];
if (Enabled)
{
// Enable blending
if (currentState == null || !currentState.Enabled)
{
Gl.Enable(EnableCap.Blend);
}
// Set blending equation
if (ctx.Caps.GlExtensions.BlendMinmax_EXT)
{
if (EquationSeparated)
{
Gl.BlendEquationSeparate(RgbEquation, AlphaEquation);
}
else
{
Gl.BlendEquation((int)RgbEquation);
}
}
// Set blending function
if (FunctionSeparated)
{
Gl.BlendFuncSeparate((int)mRgbSrcFactor, (int)mRgbDstFactor, (int)mAlphaSrcFactor, (int)mAlphaDstFactor);
}
else
{
Gl.BlendFunc(mRgbSrcFactor, mRgbDstFactor);
}
// Set blend color, if required
if (RequiresConstColor(mRgbSrcFactor) || RequiresConstColor(mAlphaSrcFactor) || RequiresConstColor(mRgbDstFactor) || RequiresConstColor(mAlphaDstFactor))
{
Gl.BlendColor(mBlendColor.Red, mBlendColor.Green, mBlendColor.Blue, mBlendColor.Alpha);
}
}
else
{
// Disable blending
if (currentState == null || currentState.Enabled)
{
Gl.Disable(EnableCap.Blend);
}
}
}
private void ApplyStateCore(GraphicsContext ctx, ShaderProgram program)
{
if (Enabled)
{
// Enable blending
Gl.Enable(EnableCap.Blend);
// Set blending equation
if (ctx.Extensions.BlendMinmax_EXT)
{
if (EquationSeparated)
{
Gl.BlendEquationSeparate(RgbEquation, AlphaEquation);
}
else
{
Gl.BlendEquation((int)RgbEquation);
}
}
// Set blending function
if (FunctionSeparated)
{
Gl.BlendFuncSeparate((int)_RgbSrcFactor, (int)_RgbDstFactor, (int)_AlphaSrcFactor, (int)_AlphaDstFactor);
}
else
{
Gl.BlendFunc(_RgbSrcFactor, _RgbDstFactor);
}
// Set blend color, if required
if (RequiresConstColor(_RgbSrcFactor) || RequiresConstColor(_AlphaSrcFactor) || RequiresConstColor(_RgbDstFactor) || RequiresConstColor(_AlphaDstFactor))
{
Gl.BlendColor(_BlendColor.Red, _BlendColor.Green, _BlendColor.Blue, _BlendColor.Alpha);
}
}
else
{
// Disable blending
Gl.Disable(EnableCap.Blend);
}
}