private void ParseTechnique(UnifiedShaderInfo info, List<UnifiedShaderToken> tokens)
{
var name = ConsumeToken(tokens);
ExpectToken(name, UnifiedShaderTokenType.StringToken);
ExpectToken(ConsumeToken(tokens), UnifiedShaderTokenType.OpenBrace);
var technique = new TechniqueInfo
{
Name = name.Text,
Passes = new List<PassInfo>()
};
while (tokens[0].TokenType == UnifiedShaderTokenType.StringToken &&
tokens[0].Text == "pass")
{
var pass = new PassInfo();
ExpectToken(ConsumeToken(tokens), "pass");
var passName = ConsumeToken(tokens);
ExpectToken(passName, UnifiedShaderTokenType.StringToken);
pass.Name = passName.Text;
ParsePass(pass, tokens);
technique.Passes.Add(pass);
}
info.Techniques.Add(technique);
ExpectToken(ConsumeToken(tokens), UnifiedShaderTokenType.CloseBrace);
}
private void ParseTopLevel(UnifiedShaderInfo info, List<UnifiedShaderToken> tokens)
{
while (tokens.Count > 0)
{
var token = ConsumeToken(tokens);
switch (token.TokenType)
{
case UnifiedShaderTokenType.VersionDeclaration:
break;
case UnifiedShaderTokenType.StringToken:
switch (token.Text)
{
case "cbuffers":
ParseConstantBuffers(info, tokens);
break;
case "parameters":
ParseParameters(info, tokens);
break;
case "shaders":
ParseShaders(info, tokens);
break;
case "technique":
ParseTechnique(info, tokens);
break;
default:
throw new UnifiedShaderParsingUnexpectedTokenException(token, "cbuffers", "parameters",
"shaders", "technique");
}
break;
default:
throw new UnifiedShaderParsingUnexpectedTokenException(token,
UnifiedShaderTokenType.VersionDeclaration, UnifiedShaderTokenType.StringToken);
}
}
}
public UnifiedShaderInfo Parse(string input)
{
var tokens = Lex(input);
var info = new UnifiedShaderInfo
{
ConstantBuffers = new List<ConstantBufferInfo>(),
Parameters = new List<ParameterInfo>(),
ShaderBlocks = new Dictionary<string, ShaderBlockInfo>(),
Techniques = new List<TechniqueInfo>()
};
ParseTopLevel(info, tokens);
return info;
}
private void ParseConstantBuffers(UnifiedShaderInfo info, List<UnifiedShaderToken> tokens)
{
ExpectToken(ConsumeToken(tokens), UnifiedShaderTokenType.OpenBrace);
while (tokens[0].TokenType == UnifiedShaderTokenType.StringToken && tokens[0].Text == "cbuffer")
{
var buffer = new ConstantBufferInfo();
ParseConstantBuffer(buffer, tokens);
info.ConstantBuffers.Add(buffer);
}
ExpectToken(ConsumeToken(tokens), UnifiedShaderTokenType.CloseBrace);
}
private void ParseParameters(UnifiedShaderInfo info, List<UnifiedShaderToken> tokens)
{
ExpectToken(ConsumeToken(tokens), UnifiedShaderTokenType.OpenBrace);
ParseParameterList(info.Parameters, tokens);
ExpectToken(ConsumeToken(tokens), UnifiedShaderTokenType.CloseBrace);
}
private void ParseShaders(UnifiedShaderInfo info, List<UnifiedShaderToken> tokens)
{
ExpectToken(ConsumeToken(tokens), UnifiedShaderTokenType.OpenBrace);
while (tokens[0].TokenType == UnifiedShaderTokenType.LanguageStart)
{
var languageStart = ConsumeToken(tokens);
var languageBlock = ConsumeToken(tokens);
var languageEnd = ConsumeToken(tokens);
ExpectToken(languageStart, UnifiedShaderTokenType.LanguageStart);
ExpectToken(languageBlock, UnifiedShaderTokenType.LanguageBlock);
ExpectToken(languageEnd, UnifiedShaderTokenType.LanguageEnd);
if (!info.ShaderBlocks.ContainsKey(languageStart.Text))
{
info.ShaderBlocks[languageStart.Text] = new ShaderBlockInfo
{
ShaderText = String.Empty
};
}
info.ShaderBlocks[languageStart.Text].ShaderText += languageBlock.Text;
}
ExpectToken(ConsumeToken(tokens), UnifiedShaderTokenType.CloseBrace);
}
