private bool GetDeclaration(TypeAndMethodName name, out BaseMethodDeclarationSyntax decl)
{
bool isConstructor = name.MethodName == ".ctor";
ITypeSymbol symb = Compilation.FindTypeByMetadataName(name.TypeName);
foreach (SyntaxReference synRef in symb.DeclaringSyntaxReferences)
{
SyntaxNode node = synRef.GetSyntax();
foreach (SyntaxNode child in node.ChildNodes())
{
if (isConstructor)
{
if (child is ConstructorDeclarationSyntax cds)
{
decl = cds;
return(true);
}
}
if (child is MethodDeclarationSyntax mds)
{
if (mds.Identifier.ToFullString() == name.MethodName)
{
decl = mds;
return(true);
}
}
}
}
decl = null;
return(false);
}
public override void VisitAttribute(AttributeSyntax node)
{
// TODO: Only look at assembly-level attributes.
if (node.Name.ToFullString().Contains("ComputeShaderSet"))
{
string name = GetStringParam(node, 0);
string cs = GetStringParam(node, 1);
if (!TypeAndMethodName.Get(cs, out TypeAndMethodName csName))
{
throw new ShaderGenerationException("ComputeShaderSetAttribute has an incomplete or invalid compute shader name.");
}
_shaderSets.Add(new ShaderSetInfo(name, csName));
}
else if (node.Name.ToFullString().Contains("ShaderSet"))
{
int paramIndex = 0;
string name = GetStringParam(node, paramIndex++);
TypeAndMethodName vsName = null;
string vs = GetStringParam(node, paramIndex++);
if (vs != null && !TypeAndMethodName.Get(vs, out vsName))
{
throw new ShaderGenerationException("ShaderSetAttribute has an incomplete or invalid vertex shader name.");
}
TypeAndMethodName gsName = null;
if (node.ArgumentList.Arguments.Count > 3)
{
string gs = GetStringParam(node, paramIndex++);
if (gs != null && !TypeAndMethodName.Get(gs, out gsName))
{
throw new ShaderGenerationException("ShaderSetAttribute has an incomplete or invalid geometry shader name.");
}
}
TypeAndMethodName fsName = null;
string fs = GetStringParam(node, paramIndex++);
if (fs != null && !TypeAndMethodName.Get(fs, out fsName))
{
throw new ShaderGenerationException("ShaderSetAttribute has an incomplete or invalid fragment shader name.");
}
if (vsName == null && gsName == null && fsName == null)
{
throw new ShaderGenerationException("ShaderSetAttribute must specify at least one shader name.");
}
if (!_discoveredNames.Add(name))
{
throw new ShaderGenerationException("Multiple shader sets with the same name were defined: " + name);
}
_shaderSets.Add(new ShaderSetInfo(
name,
vsName,
gsName,
fsName));
}
}
public ShaderSetInfo(string name, TypeAndMethodName vs, TypeAndMethodName gs, TypeAndMethodName fs)
//: this(name, vs, fs)
{
Name = name;
GeometryShader = gs;
VertexShader = vs;
FragmentShader = fs;
}
public ShaderSetInfo(string name, TypeAndMethodName vs, TypeAndMethodName fs)
{
if (vs == null && fs == null)
{
throw new ArgumentException("At least one of vs or fs must be non-null.");
}
Name = name;
VertexShader = vs;
FragmentShader = fs;
}
public FunctionCallGraphDiscoverer(Compilation compilation, TypeAndMethodName rootMethod)
{
Compilation = compilation;
_rootNode = new CallGraphNode()
{
Name = rootMethod
};
bool foundDecl = GetDeclaration(rootMethod, out _rootNode.Declaration);
Debug.Assert(foundDecl);
_nodesByName.Add(rootMethod, _rootNode);
}
private void GenerateShaders(ShaderSetInfo ss, ShaderGenerationResult result)
{
TypeAndMethodName vertexFunctionName = ss.VertexShader;
TypeAndMethodName fragmentFunctionName = ss.FragmentShader;
HashSet <SyntaxTree> treesToVisit = new HashSet <SyntaxTree>();
if (vertexFunctionName != null)
{
GetTrees(treesToVisit, vertexFunctionName.TypeName);
}
if (fragmentFunctionName != null)
{
GetTrees(treesToVisit, fragmentFunctionName.TypeName);
}
foreach (LanguageBackend language in _languages)
{
language.InitContext(ss.Name);
}
ShaderSyntaxWalker walker = new ShaderSyntaxWalker(_compilation, _languages.ToArray(), ss);
foreach (SyntaxTree tree in treesToVisit)
{
walker.Visit(tree.GetRoot());
}
foreach (LanguageBackend language in _languages)
{
ShaderModel model = language.GetShaderModel(ss.Name);
ShaderFunction vsFunc = (ss.VertexShader != null)
? model.GetFunction(ss.VertexShader.FullName)
: null;
ShaderFunction fsFunc = (ss.FragmentShader != null)
? model.GetFunction(ss.FragmentShader.FullName)
: null;
{
string vsCode = null;
string fsCode = null;
if (vsFunc != null)
{
vsCode = language.GetCode(ss.Name, vsFunc);
}
if (fsFunc != null)
{
fsCode = language.GetCode(ss.Name, fsFunc);
}
result.AddShaderSet(language, new GeneratedShaderSet(ss.Name, vsCode, fsCode, vsFunc, fsFunc, model));
}
}
}
private CallGraphNode GetNode(TypeAndMethodName name)
{
if (!_nodesByName.TryGetValue(name, out CallGraphNode node))
{
node = new CallGraphNode()
{
Name = name
};
GetDeclaration(name, out node.Declaration);
_nodesByName.Add(name, node);
}
return(node);
}
public override void VisitAttribute(AttributeSyntax node)
{
if (node.Name.ToFullString().Contains("ShaderSet"))
{
string name = GetStringParam(node, 0);
TypeAndMethodName vsName = null;
string vs = GetStringParam(node, 1);
if (vs != null && !TypeAndMethodName.Get(vs, out vsName))
{
throw new ShaderGenerationException("ShaderSetAttribute has an incomplete or invalid vertex shader name.");
}
TypeAndMethodName fsName = null;
string fs = GetStringParam(node, 2);
if (fs != null && !TypeAndMethodName.Get(fs, out fsName))
{
throw new ShaderGenerationException("ShaderSetAttribute has an incomplete or invalid fragment shader name.");
}
if (vsName == null && fsName == null)
{
throw new ShaderGenerationException("ShaderSetAttribute must specify at least one shader name.");
}
if (!_discoveredNames.Add(name))
{
throw new ShaderGenerationException("Multiple shader sets with the same name were defined: " + name);
}
_shaderSets.Add(new ShaderSetInfo(
name,
vsName,
fsName));
}
}
public ShaderGenerator(
Compilation compilation,
string vertexFunctionName,
string fragmentFunctionName,
LanguageBackend[] languages,
IShaderSetProcessor[] processors)
{
if (compilation == null)
{
throw new ArgumentNullException(nameof(compilation));
}
if (vertexFunctionName == null && fragmentFunctionName == null)
{
throw new ArgumentException(
$"One of {nameof(vertexFunctionName)} or {nameof(fragmentFunctionName)} must be non-null.");
}
if (languages == null)
{
throw new ArgumentNullException(nameof(languages));
}
if (processors == null)
{
throw new ArgumentNullException(nameof(processors));
}
if (languages.Length == 0)
{
throw new ArgumentException("At least one LanguageBackend must be provided.");
}
_compilation = compilation;
_languages = new List <LanguageBackend>(languages);
TypeAndMethodName _vertexFunctionName = null;
if (vertexFunctionName != null &&
!TypeAndMethodName.Get(vertexFunctionName, out _vertexFunctionName))
{
throw new ShaderGenerationException(
$"The name passed to {nameof(vertexFunctionName)} must be a fully-qualified type and method.");
}
TypeAndMethodName _fragmentFunctionName = null;
if (fragmentFunctionName != null &&
!TypeAndMethodName.Get(fragmentFunctionName, out _fragmentFunctionName))
{
throw new ShaderGenerationException(
$"The name passed to {nameof(fragmentFunctionName)} must be a fully-qualified type and method.");
}
string setName = string.Empty;
if (vertexFunctionName != null)
{
setName = vertexFunctionName;
}
if (fragmentFunctionName != null)
{
if (setName == string.Empty)
{
setName = fragmentFunctionName;
}
else
{
setName += "+" + fragmentFunctionName;
}
}
_shaderSets.Add(new ShaderSetInfo(
setName,
_vertexFunctionName,
_fragmentFunctionName));
_processors = processors;
}
public ShaderGenerator(
Compilation compilation,
LanguageBackend[] languages,
string vertexFunctionName = null,
string fragmentFunctionName = null,
string computeFunctionName = null,
params IShaderSetProcessor[] processors)
{
if (languages == null)
{
throw new ArgumentNullException(nameof(languages));
}
if (languages.Length < 1)
{
throw new ArgumentException("At least one LanguageBackend must be provided.");
}
_compilation = compilation ?? throw new ArgumentNullException(nameof(compilation));
_languages = languages.ToArray();
_processors = processors;
// If we've not specified any names, we're auto-discovering
if (string.IsNullOrWhiteSpace(vertexFunctionName) &&
string.IsNullOrWhiteSpace(fragmentFunctionName) &&
string.IsNullOrWhiteSpace(computeFunctionName))
{
ShaderSetDiscoverer ssd = new ShaderSetDiscoverer();
foreach (SyntaxTree tree in _compilation.SyntaxTrees)
{
ssd.Visit(tree.GetRoot());
}
_shaderSets = ssd.GetShaderSets();
return;
}
// We've explicitly specified shaders so find them directly.
List <ShaderSetInfo> shaderSets = new List <ShaderSetInfo>();
TypeAndMethodName vertex = null;
if (!string.IsNullOrWhiteSpace(vertexFunctionName) &&
!TypeAndMethodName.Get(vertexFunctionName, out vertex))
{
throw new ShaderGenerationException(
$"The name passed to {nameof(vertexFunctionName)} must be a fully-qualified type and method.");
}
TypeAndMethodName fragment = null;
if (!string.IsNullOrWhiteSpace(fragmentFunctionName) &&
!TypeAndMethodName.Get(fragmentFunctionName, out fragment))
{
throw new ShaderGenerationException(
$"The name passed to {nameof(fragmentFunctionName)} must be a fully-qualified type and method.");
}
if (vertex != null || fragment != null)
{
// We have either a vertex or fragment, so create a graphics shader set.
string setName = string.Empty;
if (vertex != null)
{
setName = vertexFunctionName;
}
if (fragment != null)
{
if (setName == string.Empty)
{
setName = fragmentFunctionName;
}
else
{
setName += "+" + fragmentFunctionName;
}
}
shaderSets.Add(new ShaderSetInfo(setName, vertex, fragment));
}
TypeAndMethodName compute = null;
if (!string.IsNullOrWhiteSpace(computeFunctionName) &&
!TypeAndMethodName.Get(computeFunctionName, out compute))
{
throw new ShaderGenerationException(
$"The name passed to {nameof(computeFunctionName)} must be a fully-qualified type and method.");
}
if (compute != null)
{
shaderSets.Add(new ShaderSetInfo(computeFunctionName, compute));
}
_shaderSets = shaderSets.ToArray();
}
public ShaderSetInfo(string name, TypeAndMethodName cs)
{
Name = name;
ComputeShader = cs;
}