public override void EmitImplSetup()
{
constantElement = GetElement("Constant");
InitBlock.AppendComment("D3D11 Geometry Shader");
var gsEnabledAttr = FindAttribute(constantElement, "__D3D11GeometryShaderEnabled");
if (gsEnabledAttr == null)
{
return;
}
var uniformElement = GetElement("Uniform");
var fineVertexElement = GetElement("FineVertex");
var rasterVertexElement = GetElement("RasterVertex");
var geometryInputElement = GetElement("GeometryInput");
var geometryOutputElement = GetElement("GeometryOutput");
hlslContext = new EmitContextHLSL(SharedHLSL, Range, this.EmitClass.GetName());
var entryPointSpan = hlslContext.EntryPointSpan;
var gsInstanceCount = GetAttribute(constantElement, "GS_InstanceCount");
var gsInputVertexCount = GetAttribute(constantElement, "GS_InputVertexCount");
var gsMaxOutputVertexCount = GetAttribute(constantElement, "GS_MaxOutputVertexCount");
var gsInstanceID = GetAttribute(geometryInputElement, "GS_InstanceID");
var gsInputVertices = GetAttribute(geometryInputElement, "GS_InputVertices");
var gsOutputStream = GetAttribute(geometryOutputElement, "GS_OutputStream");
hlslContext.GenerateConnectorType(fineVertexElement);
hlslContext.GenerateConnectorType(rasterVertexElement);
entryPointSpan.WriteLine("[instance({0})]",
hlslContext.EmitAttrLit(gsInstanceCount));
entryPointSpan.WriteLine("[maxvertexcount({0})]",
hlslContext.EmitAttrLit(gsMaxOutputVertexCount));
entryPointSpan.WriteLine("void main(");
bool first = true;
// \todo: "triangle" or appropriate prefix...
hlslContext.DeclareParamAndBind(
gsInputVertices,
hlslContext.MakeArrayType(
hlslContext.GenerateConnectorType(fineVertexElement),
hlslContext.EmitAttribRef(gsInputVertexCount, null)),
null,
ref first,
entryPointSpan,
prefix: "triangle ");
hlslContext.DeclareParamAndBind(
gsOutputStream,
null,
ref first,
entryPointSpan,
prefix: "inout ");
hlslContext.DeclareParamAndBind(
gsInstanceID,
"SV_GSInstanceID",
ref first,
entryPointSpan);
entryPointSpan.WriteLine("\t)");
entryPointSpan.WriteLine("{");
var gi2go = hlslContext.EmitTempRecordCtor(
entryPointSpan,
geometryInputElement,
GetAttribute(geometryOutputElement, "__gi2go"));
hlslContext.BindAttr(
GetAttribute(rasterVertexElement, "__gi2rv"),
gi2go);
var output = hlslContext.EmitConnectorCtor(
entryPointSpan,
geometryOutputElement);
entryPointSpan.WriteLine("}");
hlslContext.EmitConstantBufferDecl();
EmitShaderSetup(
hlslContext,
"gs_5_0",
"Geometry",
"GS");
}