/// <summary>
/// Function to build the D3D11 blend state.
/// </summary>
/// <param name="device">The device used to create the blend state.</param>
internal void BuildD3D11BlendState(D3D11.Device5 device)
{
Debug.Assert(D3DBlendState == null, "D3D Blend state already assigned to this pipeline state.");
(int start, int count) = RwBlendStates.GetDirtyItems();
var desc = new D3D11.BlendStateDescription1
{
AlphaToCoverageEnable = IsAlphaToCoverageEnabled,
IndependentBlendEnable = IsIndependentBlendingEnabled
};
for (int i = 0; i < count; ++i)
{
GorgonBlendState state = RwBlendStates[start + i];
if (state == null)
{
continue;
}
desc.RenderTarget[i] = new D3D11.RenderTargetBlendDescription1
{
AlphaBlendOperation = (D3D11.BlendOperation)state.AlphaBlendOperation,
BlendOperation = (D3D11.BlendOperation)state.ColorBlendOperation,
IsLogicOperationEnabled = state.LogicOperation != LogicOperation.Noop,
IsBlendEnabled = state.IsBlendingEnabled,
RenderTargetWriteMask = (D3D11.ColorWriteMaskFlags)state.WriteMask,
LogicOperation = (D3D11.LogicOperation)state.LogicOperation,
SourceAlphaBlend = (D3D11.BlendOption)state.SourceAlphaBlend,
SourceBlend = (D3D11.BlendOption)state.SourceColorBlend,
DestinationAlphaBlend = (D3D11.BlendOption)state.DestinationAlphaBlend,
DestinationBlend = (D3D11.BlendOption)state.DestinationColorBlend
};
}
for (int i = count; i < D3D11.OutputMergerStage.SimultaneousRenderTargetCount; ++i)
{
desc.RenderTarget[i] = new D3D11.RenderTargetBlendDescription1
{
AlphaBlendOperation = D3D11.BlendOperation.Add,
BlendOperation = D3D11.BlendOperation.Add,
IsLogicOperationEnabled = false,
IsBlendEnabled = false,
RenderTargetWriteMask = D3D11.ColorWriteMaskFlags.All,
LogicOperation = D3D11.LogicOperation.Noop,
SourceAlphaBlend = D3D11.BlendOption.One,
SourceBlend = D3D11.BlendOption.One,
DestinationAlphaBlend = D3D11.BlendOption.Zero,
DestinationBlend = D3D11.BlendOption.Zero
};
}
D3DBlendState = new D3D11.BlendState1(device, desc)
{
DebugName = nameof(GorgonBlendState)
};
}
/// <summary>
/// Function to assign a <see cref="GorgonBlendState"/> to the pipeline.
/// </summary>
/// <param name="state">The state to apply to the pipeline</param>
/// <param name="slot">[Optional] The slot to assign the states into.</param>
/// <returns>The fluent builder interface.</returns>
/// <exception cref="ArgumentNullException">Thrown when the <paramref name="slot"/> is less than 0, or greater than/equal to 8.</exception>
public GorgonPipelineStateBuilder BlendState(GorgonBlendState state, int slot = 0)
{
if ((slot < 0) || (slot >= D3D11.OutputMergerStage.SimultaneousRenderTargetCount))
{
throw new ArgumentOutOfRangeException(nameof(slot), string.Format(Resources.GORGFX_ERR_BLEND_SLOT_INVALID, D3D11.OutputMergerStage.SimultaneousRenderTargetCount));
}
_workState.RwBlendStates[slot] = state;
return(this);
}
