/// <summary>
/// Converts our StencilOperation enum to the D3D StencilOperation equivalent.
/// </summary>
/// <param name="op"></param>
/// <returns></returns>
public static D3D.StencilOperation ConvertEnum(Axiom.Graphics.StencilOperation op, bool invert)
{
switch (op)
{
case Axiom.Graphics.StencilOperation.Keep:
return(D3D.StencilOperation.Keep);
case Axiom.Graphics.StencilOperation.Zero:
return(D3D.StencilOperation.Zero);
case Axiom.Graphics.StencilOperation.Replace:
return(D3D.StencilOperation.Replace);
case Axiom.Graphics.StencilOperation.Increment:
return(invert ?
D3D.StencilOperation.DecrementSaturation : D3D.StencilOperation.IncrementSaturation);
case Axiom.Graphics.StencilOperation.Decrement:
return(invert ?
D3D.StencilOperation.IncrementSaturation : D3D.StencilOperation.DecrementSaturation);
case Axiom.Graphics.StencilOperation.IncrementWrap:
return(invert ?
D3D.StencilOperation.Decrement : D3D.StencilOperation.Increment);
case Axiom.Graphics.StencilOperation.DecrementWrap:
return(invert ?
D3D.StencilOperation.Increment : D3D.StencilOperation.Decrement);
case Axiom.Graphics.StencilOperation.Invert:
return(D3D.StencilOperation.Invert);
}
return(0);
}
public override void SetStencilBufferParams( CompareFunction function = CompareFunction.AlwaysPass,
int refValue = 0, int mask = -1,
StencilOperation stencilFailOp = StencilOperation.Keep, StencilOperation depthFailOp = StencilOperation.Keep,
StencilOperation passOp = StencilOperation.Keep, bool twoSidedOperation = false )
{
bool flip;
// 2 sided operation?
if ( twoSidedOperation )
{
if (!currentCapabilities.HasCapability(Graphics.Capabilities.TwoSidedStencil))
{
throw new AxiomException( "2-sided stencils are not supported on this hardware!" );
}
SetRenderState( RenderState.TwoSidedStencilMode, true );
// NB: We should always treat CCW as front face for consistent with default
// culling mode. Therefore, we must take care with two-sided stencil settings.
flip = (invertVertexWinding && activeRenderTarget.RequiresTextureFlipping) ||
(!invertVertexWinding && !activeRenderTarget.RequiresTextureFlipping);
SetRenderState( RenderState.CcwStencilFail, (int)D3DHelper.ConvertEnum( stencilFailOp, !flip ) );
SetRenderState( RenderState.CcwStencilZFail, (int)D3DHelper.ConvertEnum( depthFailOp, !flip ) );
SetRenderState( RenderState.CcwStencilPass, (int)D3DHelper.ConvertEnum( passOp, !flip ) );
}
else
{
SetRenderState( RenderState.TwoSidedStencilMode, false );
flip = false;
}
// configure standard version of the stencil operations
SetRenderState( RenderState.StencilFunc, (int)D3DHelper.ConvertEnum( function ) );
SetRenderState( RenderState.StencilRef, refValue );
SetRenderState( RenderState.StencilMask, mask );
SetRenderState( RenderState.StencilFail, (int)D3DHelper.ConvertEnum( stencilFailOp, flip ) );
SetRenderState( RenderState.StencilZFail, (int)D3DHelper.ConvertEnum( depthFailOp, flip ) );
SetRenderState( RenderState.StencilPass, (int)D3DHelper.ConvertEnum( passOp, flip ) );
}
public override void SetStencilBufferParams(CompareFunction function, int refValue, int mask, StencilOperation stencilFailOp, StencilOperation depthFailOp, StencilOperation passOp, bool twoSidedOperation)
{
// 2 sided operation?
if(twoSidedOperation) {
if(!caps.CheckCap(Capabilities.TwoSidedStencil)) {
throw new AxiomException("2-sided stencils are not supported on this hardware!");
}
device.RenderState.TwoSidedStencilMode = true;
// use CCW version of the operations
device.RenderState.CounterClockwiseStencilFail = D3DHelper.ConvertEnum(stencilFailOp, true);
device.RenderState.CounterClockwiseStencilZBufferFail = D3DHelper.ConvertEnum(depthFailOp, true);
device.RenderState.CounterClockwiseStencilPass = D3DHelper.ConvertEnum(passOp, true);
}
else {
device.RenderState.TwoSidedStencilMode = false;
}
// configure standard version of the stencil operations
device.RenderState.StencilFunction = D3DHelper.ConvertEnum(function);
device.RenderState.ReferenceStencil = refValue;
device.RenderState.StencilMask = mask;
device.RenderState.StencilFail = D3DHelper.ConvertEnum(stencilFailOp);
device.RenderState.StencilZBufferFail = D3DHelper.ConvertEnum(depthFailOp);
device.RenderState.StencilPass = D3DHelper.ConvertEnum(passOp);
}
public static D3D.StencilOperation ConvertEnum(Axiom.Graphics.StencilOperation op)
{
return(ConvertEnum(op, false));
}
