void ListOperations(ICompositingOperation op, List <ICompositingOperation> list)
{
if (op.Source1 != null)
{
ListOperations(op.Source1, list);
}
if (op.Source2 != null)
{
ListOperations(op.Source2, list);
}
list.Add(op);
}
/// <summary>
/// Applies effect to topmost image and writes result to the top.
/// </summary>
/// <param name="effect"></param>
public void Call(ICompositingOperation operation)
{
switch (operation.OperationType)
{
case OperationType.NoSource:
break;
case OperationType.OneSource:
operation.Source1 = results.Pop();
break;
case OperationType.TwoSources:
operation.Source1 = results.Pop();
operation.Source2 = results.Pop();
break;
}
results.Push(operation);
}
/// <summary>
/// Composites to source.
/// </summary>
/// <param name="compositeOperation"></param>
public void CompositeToSource(ICompositingOperation compositeOperation,
BlendState blendOverwrite, Colour blendColour, Region2i viewport, RenderTargetView target)
{
// 1) We first prepare the providers.
List <ICompositingOperation> relavantOperations = new List <ICompositingOperation>();
ListOperations(compositeOperation, relavantOperations);
// 2) We extract processors.
List <ICompositeInterface> processors = new List <ICompositeInterface>(relavantOperations.Count);
for (int i = 0; i < relavantOperations.Count; i++)
{
processors.Add(relavantOperations[i].Interface);
}
// 3) We prepare the shader.
ShaderCode pshader = PixelShader;
ShaderCode vshader = VertexShader;
States.BlendState bstate = blendOverwrite != null ? blendOverwrite : DefaultBlendState;
States.DepthStencilState dstate = DefaultDepthStencilState;
States.RasterizationState rstate = DefaultRasterizationState;
FixedShaderParameters pparams = pshader.FixedParameters;
FixedShaderParameters vparams = vshader.FixedParameters;
ConstantBufferLayoutBuilder builder = new ConstantBufferLayoutBuilder();
List <TextureView> textures = new List <TextureView>();
List <States.SamplerState> samplers = new List <States.SamplerState>();
// We set interface array.
pparams.SetInterfaceArray("Composite", processors);
builder.AppendElement("Offset", PinFormat.Floatx2);
// 4) We fill parameters and builder.
for (int i = 0; i < processors.Count; i++)
{
string name = string.Format("Composite[{0}]", i);
InterfaceHelper.ApplyInterfaceConstants(name, processors[i], builder, pparams, textures, samplers,
processors[i].ParameterValues);
}
// 5) We obtain layout big enough.
ConstantBufferLayout layout = builder.CreateLayout();
pparams.AddLayout(0, layout);
ConstantBufferView constantBuffer = pixelTypelessConstantBuffer.CreateConstantBuffer(layout);
// 6) We fill buffer.
constantBuffer.Map(MapOptions.Write);
try
{
constantBuffer.SetConstant("Offset", new Vector2f((float)viewport.X, (float)viewport.Y));
for (int i = 0; i < processors.Count; i++)
{
InterfaceHelper.FillInterfaceConstants(string.Format("Composite[{0}]", i), processors[i],
constantBuffer, processors[i].ParameterValues);
}
}
finally
{
constantBuffer.UnMap();
}
// 7) We prepare geometry.
// We get quad geometry
Geometry geometry = alignedQuad;
// ) We render the composition.
GraphicsDevice device = Device;
using (DeviceLock l = device.Lock())
{
// We set our state objects.
device.SetBlendState(bstate, blendColour, 0xFFFFFFFF);
device.SetDepthStencilState(dstate, 0);
device.SetRasterizationState(rstate);
device.Viewport = viewport;
// We prepare to render.
device.SetVertexShader(vshader.Compile(device, vparams) as VShader, geometry, null, null, null);
device.SetGeometryShader(null, null, null, null, null);
device.SetPixelShader(pshader.Compile(device, pparams) as PShader, samplers.ToArray(), textures.ToArray(), new ConstantBufferView[] { constantBuffer },
new RenderTargetView[] { target }, null);
// We render it.
if (geometry.IndexBuffer != null)
{
device.DrawIndexed(0, 6, 0);
}
else
{
device.Draw(0, 6);
}
device.SetPixelShader(null, null, null, null, null, null);
}
// We do not use constant buffer anymore.
constantBuffer.Dispose();
}