/// <summary>
/// Parse stream output declarations.
/// Format is "[slot :] semantic[index][.mask] ; ...".
/// </summary>
/// <param name="entries">The parsed entries.</param>
/// <param name="strides">The output strides.</param>
/// <param name="streams">The output declarations to parse.</param>
public static void Parse(IList <ShaderStreamOutputDeclarationEntry> entries, out int[] strides, string[] streams, IList <Variable> fields)
{
strides = new int[4];
var fieldsBySemantic = fields.ToDictionary(x => Semantic.Parse(x.Qualifiers.OfType <Semantic>().Single().Name));
for (int streamIndex = 0; streamIndex < streams.Length; ++streamIndex)
{
// Parse multiple declarations separated by semicolon
var stream = streams[streamIndex];
foreach (var streamOutput in stream.Split(';'))
{
// Parse a single declaration: "[slot :] semantic[index][.mask]"
var match = streamOutputRegex.Match(streamOutput);
if (!match.Success)
{
throw new InvalidOperationException("Could not parse stream output.");
}
var streamOutputDecl = new ShaderStreamOutputDeclarationEntry();
// Split semantic into (name, index)
var semantic = Semantic.Parse(match.Groups[3].Value);
streamOutputDecl.SemanticName = semantic.Key;
streamOutputDecl.SemanticIndex = semantic.Value;
//if (streamOutputDecl.SemanticName == "$SKIP")
// streamOutputDecl.SemanticName = null;
var matchingField = fieldsBySemantic[semantic];
var matchingFieldType = matchingField.Type.TypeInference.TargetType ?? matchingField.Type;
if (matchingFieldType is VectorType)
{
streamOutputDecl.ComponentCount = (byte)((VectorType)matchingFieldType).Dimension;
}
else if (matchingFieldType is ScalarType)
{
streamOutputDecl.ComponentCount = 1;
}
else
{
throw new InvalidOperationException(string.Format("Could not recognize type of stream output for {0}.", matchingField));
}
var mask = match.Groups[5].Value;
ParseMask(mask, ref streamOutputDecl.StartComponent, ref streamOutputDecl.ComponentCount);
byte.TryParse(match.Groups[2].Value, out streamOutputDecl.OutputSlot);
streamOutputDecl.Stream = streamIndex;
strides[streamOutputDecl.OutputSlot] += streamOutputDecl.ComponentCount * sizeof(float);
entries.Add(streamOutputDecl);
}
}
}
/// <summary>
/// Parse stream output declarations.
/// Format is "[slot :] semantic[index][.mask] ; ...".
/// </summary>
/// <param name="entries">The parsed entries.</param>
/// <param name="strides">The output strides.</param>
/// <param name="streams">The output declarations to parse.</param>
public static void Parse(IList<ShaderStreamOutputDeclarationEntry> entries, out int[] strides, string[] streams, IList<Variable> fields)
{
strides = new int[4];
var fieldsBySemantic = fields.ToDictionary(x => Semantic.Parse(x.Qualifiers.OfType<Semantic>().Single().Name));
for (int streamIndex = 0; streamIndex < streams.Length; ++streamIndex)
{
// Parse multiple declarations separated by semicolon
var stream = streams[streamIndex];
foreach (var streamOutput in stream.Split(';'))
{
// Parse a single declaration: "[slot :] semantic[index][.mask]"
var match = streamOutputRegex.Match(streamOutput);
if (!match.Success)
throw new InvalidOperationException("Could not parse stream output.");
var streamOutputDecl = new ShaderStreamOutputDeclarationEntry();
// Split semantic into (name, index)
var semantic = Semantic.Parse(match.Groups[3].Value);
streamOutputDecl.SemanticName = semantic.Key;
streamOutputDecl.SemanticIndex = semantic.Value;
//if (streamOutputDecl.SemanticName == "$SKIP")
// streamOutputDecl.SemanticName = null;
var matchingField = fieldsBySemantic[semantic];
var matchingFieldType = matchingField.Type.TypeInference.TargetType ?? matchingField.Type;
if (matchingFieldType is VectorType)
streamOutputDecl.ComponentCount = (byte)((VectorType)matchingFieldType).Dimension;
else if (matchingFieldType is ScalarType)
streamOutputDecl.ComponentCount = 1;
else
throw new InvalidOperationException(string.Format("Could not recognize type of stream output for {0}.", matchingField));
var mask = match.Groups[5].Value;
ParseMask(mask, ref streamOutputDecl.StartComponent, ref streamOutputDecl.ComponentCount);
byte.TryParse(match.Groups[2].Value, out streamOutputDecl.OutputSlot);
streamOutputDecl.Stream = streamIndex;
strides[streamOutputDecl.OutputSlot] += streamOutputDecl.ComponentCount * sizeof(float);
entries.Add(streamOutputDecl);
}
}
}
