mirror of
https://git.do.srb2.org/STJr/UltimateZoneBuilder.git
synced 2024-12-15 14:41:14 +00:00
974 lines
37 KiB
C#
Executable file
974 lines
37 KiB
C#
Executable file
using CodeImp.DoomBuilder.ZDoom;
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace CodeImp.DoomBuilder.Rendering.Shaders
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{
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internal class ShaderField
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{
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public int Line;
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public List<List<ZScriptToken>> ArrayDimensions;
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public string TypeName;
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public List<ZScriptToken> Initializer;
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public string Name;
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}
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internal class ShaderFunction
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{
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public int Line;
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public int CodeLine;
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public string ReturnValue;
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public string Name;
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public bool Override;
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public List<ZScriptToken> Arguments;
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public List<ZScriptToken> Code;
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}
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class Shader
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{
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internal ShaderGroup Group;
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internal string ParentName;
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public int CodeLine;
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public string Name;
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// data input for vertex shader
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public List<ShaderField> In;
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// data between vertex and fragment shader
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public List<ShaderField> V2F;
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// data output for fragment shader
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public List<ShaderField> Out;
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// source for main() of vertex shader
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public int SourceVertexLine;
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public List<ZScriptToken> SourceVertex;
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// source for main() of fragment shader
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public int SourceFragmentLine;
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public List<ZScriptToken> SourceFragment;
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// functions local to the shader/parents
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public List<ShaderFunction> Functions = new List<ShaderFunction>();
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private const string GLSLInternalSeparator = "_";
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public Shader(ShaderGroup group)
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{
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Group = group;
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}
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public ShaderFunction GetFunction(string identifier)
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{
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foreach (ShaderFunction func in Functions)
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if (func.Name == identifier)
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return func;
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return null;
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}
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// dumps all uniforms into a string
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private string GetTokenListSource(List<ZScriptToken> tokens)
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{
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string ss = "";
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foreach (ZScriptToken tok in tokens)
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{
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bool isBlock = false;
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switch (tok.Type)
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{
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case ZScriptTokenType.LineComment:
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ss += "//";
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break;
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case ZScriptTokenType.BlockComment:
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ss += "/*";
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isBlock = true;
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break;
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}
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ss += tok.Value;
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if (isBlock) ss += "*/";
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}
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return ss;
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}
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private string GetUniformSource()
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{
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string output = "";
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foreach (ShaderField field in Group.Uniforms)
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{
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output += string.Format("#line {0}\n", field.Line);
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output += "uniform ";
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output += field.TypeName;
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if (field.ArrayDimensions != null)
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{
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foreach (List<ZScriptToken> arrayDim in field.ArrayDimensions)
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output += "[" + GetTokenListSource(arrayDim) + "]";
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}
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output += " " + field.Name;
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if (field.Initializer != null)
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output += GetTokenListSource(field.Initializer);
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output += ";\n";
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}
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return output;
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}
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private string GetDataIOInternalName(string block, string name)
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{
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return string.Format("{2}SC{2}B{0}{2}F{1}", block, name, GLSLInternalSeparator);
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}
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private string GetDataIOSource(string prefix, string blockid, List<ShaderField> block, bool vertexInput)
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{
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string output = "";
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foreach (ShaderField field in block)
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{
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output += string.Format("#line {0}\n", field.Line);
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if (vertexInput)
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{
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int location;
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switch (field.Name)
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{
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case "Position":
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location = 0;
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break;
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case "Color":
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location = 1;
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break;
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case "TextureCoordinate":
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location = 2;
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break;
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case "Normal":
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location = 3;
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break;
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default:
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throw new ShaderCompileException("Invalid input field {0} (not supported)", field.Name);
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}
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output += string.Format("layout(location = {0}) ", location);
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}
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output += prefix + " ";
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output += field.TypeName;
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if (field.ArrayDimensions != null)
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{
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foreach (List<ZScriptToken> arrayDim in field.ArrayDimensions)
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output += "[" + GetTokenListSource(arrayDim) + "]";
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}
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output += " " + GetDataIOInternalName(blockid, field.Name);
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if (field.Initializer != null)
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output += GetTokenListSource(field.Initializer);
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output += ";\n";
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}
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return output;
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}
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private void GetReferencedFunctions(List<ZScriptToken> source, List<string> functions)
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{
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for (int i = 0; i < source.Count; i++)
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{
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ZScriptToken token = source[i];
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if (token.Type != ZScriptTokenType.Identifier)
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continue;
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if (functions.Contains(token.Value))
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continue;
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// check token to the left - needs to not be identifier.
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// check token to the right - needs to be open parenthesis
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// ---
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// the idea is that we can differentiate pixel = desaturate(...) from vec4 desaturate(1,1,1,1)
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//
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ZScriptTokenType leftToken = ZScriptTokenType.Invalid;
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ZScriptTokenType rightToken = ZScriptTokenType.Invalid;
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for (int j = i-1; j >= 0; j--)
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{
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ZScriptTokenType tt = source[j].Type;
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if (!IsWhitespace(tt))
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{
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leftToken = tt;
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break;
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}
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}
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for (int j = i+1; j < source.Count; j++)
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{
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ZScriptTokenType tt = source[j].Type;
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if (!IsWhitespace(tt))
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{
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rightToken = tt;
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break;
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}
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}
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if (leftToken != ZScriptTokenType.Identifier && rightToken == ZScriptTokenType.OpenParen)
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{
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// find function
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functions.Add(token.Value);
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// if function was found, recurse and find functions it may depend on.
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ShaderFunction func = GetFunction(token.Value);
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if (func == null) func = Group.GetFunction(token.Value);
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if (func != null) GetReferencedFunctions(func.Code, functions);
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}
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}
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}
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private string GetFunctionSource(List<ZScriptToken> shaderSource)
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{
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List<string> functionNames = new List<string>();
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GetReferencedFunctions(shaderSource, functionNames);
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string preOutput = "";
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string output = "";
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foreach (string functionName in functionNames)
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{
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ShaderFunction func = GetFunction(functionName);
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if (func == null) func = Group.GetFunction(functionName);
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if (func == null) continue;
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string funcOutput = string.Format("#line {0}\n", func.Line) + func.ReturnValue + " " + func.Name + " (" + GetTokenListSource(func.Arguments) + ")";
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preOutput += funcOutput + ";\n";
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funcOutput += " {\n" + string.Format("#line {0}\n", func.CodeLine) + GetTokenListSource(func.Code) + "}\n";
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output += funcOutput;
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}
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return preOutput + "\n" + output;
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}
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private static bool IsWhitespace(ZScriptTokenType t)
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{
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switch (t)
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{
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case ZScriptTokenType.Whitespace:
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case ZScriptTokenType.LineComment:
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case ZScriptTokenType.BlockComment:
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case ZScriptTokenType.Newline:
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return true;
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}
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return false;
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}
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public List<ZScriptToken> ReplaceIO(List<ZScriptToken> tokens)
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{
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List<ZScriptToken> output = new List<ZScriptToken>(tokens);
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// we replace all <structPrefix>.<field> with GetDataBlockInternalName(<structPrefix>, <field>)
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// thus, "in" and "out" are reserved keywords and may not be found out of such context
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for (int i = 0; i < output.Count; i++)
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{
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ZScriptToken token = output[i];
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if (token.Type != ZScriptTokenType.Identifier)
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continue;
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if (token.Value != "in" && token.Value != "out" && token.Value != "v2f")
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continue;
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string structPrefix = token.Value;
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int startIndex = i;
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i++;
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// skip whitespace...
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for (; i < output.Count; i++)
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if (!IsWhitespace(output[i].Type)) break;
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if (i >= output.Count || output[i].Type != ZScriptTokenType.Dot)
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continue;
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i++;
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// skip whitespace again...
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for (; i < output.Count; i++)
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if (!IsWhitespace(output[i].Type)) break;
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if (i >= output.Count || output[i].Type != ZScriptTokenType.Identifier)
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continue;
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//
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string fieldName = output[i].Value;
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string realName = GetDataIOInternalName(structPrefix, fieldName);
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// now, remove all tokens between prefix and current
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output.RemoveRange(startIndex + 1, i - startIndex);
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ZScriptToken realToken = new ZScriptToken(output[startIndex]);
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realToken.Value = realName;
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output[startIndex] = realToken;
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i = startIndex - 1;
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// check if this field exists, just in case. and produce an error
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List<ShaderField> searchIn = null;
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switch (structPrefix)
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{
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case "in":
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searchIn = In;
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break;
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case "out":
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searchIn = Out;
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break;
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case "v2f":
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searchIn = V2F;
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break;
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}
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if (searchIn != null)
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{
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bool found = false;
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foreach (ShaderField field in searchIn)
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{
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if (field.Name == fieldName)
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{
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found = true;
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break;
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}
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}
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if (!found)
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throw new ShaderCompileException("Referenced non-existent {0} field {1}", structPrefix, fieldName);
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}
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}
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return output;
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}
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public string GetVertexSource()
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{
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if (In == null || V2F == null || SourceVertex == null)
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throw new ShaderCompileException("Tried to compile incomplete shader {0}", Name);
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string src = "";
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src += GetDataIOSource("in", "in", In, true) + "\n\n";
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src += GetDataIOSource("out", "v2f", V2F, false) + "\n\n";
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src += GetUniformSource() + "\n";
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src += GetFunctionSource(SourceVertex) + "\n\n";
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src += "void main() {\n" + string.Format("#line {0}\n", SourceVertexLine) + GetTokenListSource(ReplaceIO(SourceVertex)) + "\n}\n\n";
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return src;
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}
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public string GetFragmentSource()
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{
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if (Out == null || V2F == null || SourceFragment == null)
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throw new ShaderCompileException("Tried to compile incomplete shader {0}", Name);
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string src = "";
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src += GetDataIOSource("in", "v2f", V2F, false) + "\n\n";
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src += GetDataIOSource("out", "out", Out, false) + "\n\n";
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src += GetUniformSource() + "\n";
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src += GetFunctionSource(SourceFragment) + "\n\n";
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src += "void main() {\n" + string.Format("#line {0}\n", SourceFragmentLine) + GetTokenListSource(ReplaceIO(SourceFragment)) + "\n}\n\n";
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return src;
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}
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}
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class ShaderGroup
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{
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internal List<ShaderField> Uniforms = new List<ShaderField>();
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internal List<Shader> Shaders = new List<Shader>();
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internal List<ShaderFunction> Functions = new List<ShaderFunction>();
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public Shader GetShader(string identifier)
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{
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foreach (Shader s in Shaders)
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if (s.Name == identifier) return s;
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return null;
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}
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public ShaderFunction GetFunction(string identifier)
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{
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foreach (ShaderFunction f in Functions)
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if (f.Name == identifier) return f;
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return null;
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}
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}
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class ShaderCompileException : Exception
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{
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public ShaderCompileException(string fmt, params object[] v) : base(string.Format(fmt, v)) { }
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}
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class ShaderCompiler
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{
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// this is to implement partial parsing. it counts {}, (), and []. it stops parsing at the specified type, if outside of nesting.
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// also if last block token equals to the type, it will stop at the outer level. (i.e. last })
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private static List<ZScriptToken> ReadEverythingUntil(ZScriptTokenizer t, ZScriptTokenType type, bool eofIsOk, bool skipWhitespace)
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{
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List<ZScriptToken> tokens = new List<ZScriptToken>();
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int levelCurly = 0;
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int levelSquare = 0;
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int levelParen = 0;
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while (true)
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{
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if (skipWhitespace)
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t.SkipWhitespace();
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long cpos = t.Reader.BaseStream.Position;
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ZScriptToken token = t.ReadToken();
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if (token == null)
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{
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if (!eofIsOk)
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throw new ShaderCompileException("Expected {0} or token, got <EOF>", type);
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break;
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}
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// if this is the end token, don't check anything -- just return
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if (levelCurly == 0 && levelSquare == 0 && levelParen == 0 && token.Type == type)
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{
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// rewind and return token list
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t.Reader.BaseStream.Position = cpos;
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break;
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}
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switch (token.Type)
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{
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case ZScriptTokenType.OpenCurly:
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levelCurly++;
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break;
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case ZScriptTokenType.CloseCurly:
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levelCurly--;
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break;
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case ZScriptTokenType.OpenParen:
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levelParen++;
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break;
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case ZScriptTokenType.CloseParen:
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levelParen--;
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break;
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case ZScriptTokenType.OpenSquare:
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levelSquare++;
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break;
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case ZScriptTokenType.CloseSquare:
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levelSquare--;
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break;
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}
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tokens.Add(token);
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}
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return tokens;
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}
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private static void CompileShaderField(ShaderField field, ZScriptTokenizer t)
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{
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ZScriptToken token;
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// read name and array dimensions
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while (true)
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{
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t.SkipWhitespace();
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token = t.ExpectToken(ZScriptTokenType.OpenSquare, ZScriptTokenType.Identifier);
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if (!(token?.IsValid ?? true))
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throw new ShaderCompileException("Expected array dimensions or field name, got {0}", token?.ToString() ?? "<EOF>");
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// array finished
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if (token.Type == ZScriptTokenType.Identifier)
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{
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field.Name = token.Value;
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break;
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}
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// read array
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List<ZScriptToken> arrayDimTokens = ReadEverythingUntil(t, ZScriptTokenType.CloseSquare, false, false);
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if (field.ArrayDimensions == null)
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field.ArrayDimensions = new List<List<ZScriptToken>>();
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field.ArrayDimensions.Add(arrayDimTokens);
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token = t.ExpectToken(ZScriptTokenType.CloseSquare);
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if (!(token?.IsValid ?? true))
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throw new ShaderCompileException("Expected closing square brace, got {0}", token?.ToString() ?? "<EOF>");
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}
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// read additional array dimensions if present, and initializer. or end parsing
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while (true)
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{
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t.SkipWhitespace();
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token = t.ExpectToken(ZScriptTokenType.OpenSquare, ZScriptTokenType.OpAssign, ZScriptTokenType.Semicolon);
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if (!(token?.IsValid ?? true))
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throw new ShaderCompileException("Expected array dimensions, initializer or semicolon, got {0}", token?.ToString() ?? "<EOF>");
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// field is done
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if (token.Type == ZScriptTokenType.Semicolon)
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break;
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// has initializer
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if (token.Type == ZScriptTokenType.OpAssign)
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{
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field.Initializer = ReadEverythingUntil(t, ZScriptTokenType.Semicolon, false, false);
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token = t.ExpectToken(ZScriptTokenType.Semicolon);
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if (!(token?.IsValid ?? true))
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throw new ShaderCompileException("Expected semicolon, got {0}", token?.ToString() ?? "<EOF>");
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break;
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}
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// read array
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List<ZScriptToken> arrayDimTokens = ReadEverythingUntil(t, ZScriptTokenType.CloseSquare, false, false);
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if (field.ArrayDimensions == null)
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field.ArrayDimensions = new List<List<ZScriptToken>>();
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field.ArrayDimensions.Add(arrayDimTokens);
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token = t.ExpectToken(ZScriptTokenType.CloseSquare);
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if (!(token?.IsValid ?? true))
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throw new ShaderCompileException("Expected closing square brace, got {0}", token?.ToString() ?? "<EOF>");
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}
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}
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private static void CompileUniforms(ShaderGroup output, ZScriptTokenizer t)
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{
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// so a type of a variable is normally identifier+array dimensions
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// array dimensions may also exist on the variable itself (oh god this shitty C syntax)
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t.SkipWhitespace();
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ZScriptToken token;
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token = t.ExpectToken(ZScriptTokenType.OpenCurly);
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if (!(token?.IsValid ?? true))
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throw new ShaderCompileException("Expected uniforms block, got {0}", token?.ToString() ?? "<EOF>");
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while (true)
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{
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t.SkipWhitespace();
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token = t.ExpectToken(ZScriptTokenType.Identifier, ZScriptTokenType.CloseCurly);
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if (!(token?.IsValid ?? true))
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throw new ShaderCompileException("Expected uniform or end of block, got {0}", token?.ToString() ?? "<EOF>");
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if (token.Type == ZScriptTokenType.CloseCurly)
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break; // done reading uniforms
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// first goes the name, then array dimensions, then the variable name, then array dimensions, then initializer
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ShaderField field = new ShaderField();
|
|
field.Line = t.PositionToLine(token.Position);
|
|
field.TypeName = token.Value;
|
|
|
|
CompileShaderField(field, t);
|
|
|
|
// done reading field, add it
|
|
output.Uniforms.Add(field);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
private static void CompileShaderFunction(ShaderFunction func, ZScriptTokenizer t)
|
|
{
|
|
ZScriptToken token;
|
|
|
|
t.SkipWhitespace();
|
|
token = t.ExpectToken(ZScriptTokenType.Identifier);
|
|
if (!(token?.IsValid ?? true))
|
|
throw new ShaderCompileException("Expected function name, got {0}", token?.ToString() ?? "<EOF>");
|
|
|
|
func.Name = token.Value;
|
|
|
|
t.SkipWhitespace();
|
|
token = t.ExpectToken(ZScriptTokenType.OpenParen);
|
|
if (!(token?.IsValid ?? true))
|
|
throw new ShaderCompileException("Expected function argument list, got {0}", token?.ToString() ?? "<EOF>");
|
|
|
|
func.Arguments = ReadEverythingUntil(t, ZScriptTokenType.CloseParen, false, false);
|
|
|
|
token = t.ExpectToken(ZScriptTokenType.CloseParen);
|
|
if (!(token?.IsValid ?? true))
|
|
throw new ShaderCompileException("Expected end of function arguments, got {0}", token?.ToString() ?? "<EOF>");
|
|
|
|
t.SkipWhitespace();
|
|
token = t.ExpectToken(ZScriptTokenType.OpenCurly);
|
|
if (!(token?.IsValid ?? true))
|
|
throw new ShaderCompileException("Expected function code block, got {0}", token?.ToString() ?? "<EOF>");
|
|
|
|
func.CodeLine = t.PositionToLine(token.Position);
|
|
func.Code = ReadEverythingUntil(t, ZScriptTokenType.CloseCurly, false, false);
|
|
|
|
token = t.ExpectToken(ZScriptTokenType.CloseCurly);
|
|
if (!(token?.IsValid ?? true))
|
|
throw new ShaderCompileException("Expected end of function code block, got {0}", token?.ToString() ?? "<EOF>");
|
|
|
|
}
|
|
|
|
private static void CompileFunctions(ShaderGroup output, ZScriptTokenizer t)
|
|
{
|
|
|
|
t.SkipWhitespace();
|
|
ZScriptToken token;
|
|
|
|
token = t.ExpectToken(ZScriptTokenType.OpenCurly);
|
|
if (!(token?.IsValid ?? true))
|
|
throw new ShaderCompileException("Expected functions block, got {0}", token?.ToString() ?? "<EOF>");
|
|
|
|
while (true)
|
|
{
|
|
|
|
t.SkipWhitespace();
|
|
token = t.ExpectToken(ZScriptTokenType.Identifier, ZScriptTokenType.CloseCurly);
|
|
if (!(token?.IsValid ?? true))
|
|
throw new ShaderCompileException("Expected function or end of block, got {0}", token?.ToString() ?? "<EOF>");
|
|
|
|
if (token.Type == ZScriptTokenType.CloseCurly)
|
|
break; // done reading functions
|
|
|
|
bool isoverride = false;
|
|
if (token.Value == "override")
|
|
{
|
|
isoverride = true;
|
|
|
|
t.SkipWhitespace();
|
|
token = t.ExpectToken(ZScriptTokenType.Identifier);
|
|
if (!(token?.IsValid ?? true))
|
|
throw new ShaderCompileException("Expected function return type, got {0}", token?.ToString() ?? "<EOF>");
|
|
}
|
|
|
|
// <return value> <name> (<arguments>) { <code> }
|
|
ShaderFunction func = new ShaderFunction();
|
|
func.Line = t.PositionToLine(token.Position);
|
|
func.ReturnValue = token.Value;
|
|
func.Override = isoverride;
|
|
|
|
CompileShaderFunction(func, t);
|
|
|
|
// check if function with such name already exists in the shader
|
|
// delete it.
|
|
// overloading is not supported for now
|
|
for (int i = 0; i < output.Functions.Count; i++)
|
|
{
|
|
if (output.Functions[i].Name == func.Name)
|
|
{
|
|
if (!isoverride)
|
|
throw new ShaderCompileException("Function {0} is double-defined without 'override' keyword! (previous declaration at line {1})", func.Name, output.Functions[i].Line);
|
|
output.Functions.RemoveAt(i);
|
|
i--;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
output.Functions.Add(func);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
private static void CompileShaderFunctions(Shader output, ZScriptTokenizer t)
|
|
{
|
|
|
|
t.SkipWhitespace();
|
|
ZScriptToken token;
|
|
|
|
token = t.ExpectToken(ZScriptTokenType.OpenCurly);
|
|
if (!(token?.IsValid ?? true))
|
|
throw new ShaderCompileException("Expected functions block, got {0}", token?.ToString() ?? "<EOF>");
|
|
|
|
while (true)
|
|
{
|
|
|
|
t.SkipWhitespace();
|
|
token = t.ExpectToken(ZScriptTokenType.Identifier, ZScriptTokenType.CloseCurly);
|
|
if (!(token?.IsValid ?? true))
|
|
throw new ShaderCompileException("Expected function or end of block, got {0}", token?.ToString() ?? "<EOF>");
|
|
|
|
if (token.Type == ZScriptTokenType.CloseCurly)
|
|
break; // done reading functions
|
|
|
|
bool isoverride = false;
|
|
if (token.Value == "override")
|
|
{
|
|
isoverride = true;
|
|
|
|
t.SkipWhitespace();
|
|
token = t.ExpectToken(ZScriptTokenType.Identifier);
|
|
if (!(token?.IsValid ?? true))
|
|
throw new ShaderCompileException("Expected function return type, got {0}", token?.ToString() ?? "<EOF>");
|
|
}
|
|
|
|
// <return value> <name> (<arguments>) { <code> }
|
|
ShaderFunction func = new ShaderFunction();
|
|
func.Line = t.PositionToLine(token.Position);
|
|
func.ReturnValue = token.Value;
|
|
func.Override = isoverride;
|
|
|
|
CompileShaderFunction(func, t);
|
|
|
|
// check if function with such name already exists in the shader
|
|
// delete it.
|
|
// overloading is not supported for now
|
|
if (!isoverride)
|
|
{
|
|
ShaderFunction existingFunc = output.Group.GetFunction(func.Name);
|
|
if (existingFunc != null)
|
|
throw new ShaderCompileException("Function {0} is double-defined without 'override' keyword! (previous declaration at line {1})", func.Name, existingFunc.Line);
|
|
}
|
|
for (int i = 0; i < output.Functions.Count; i++)
|
|
{
|
|
if (output.Functions[i].Name == func.Name)
|
|
{
|
|
if (!isoverride)
|
|
throw new ShaderCompileException("Function {0} is double-defined without 'override' keyword! (previous declaration at line {1})", func.Name, output.Functions[i].Line);
|
|
output.Functions.RemoveAt(i);
|
|
i--;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
output.Functions.Add(func);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
private static List<ShaderField> CompileShaderDataBlock(ZScriptTokenizer t)
|
|
{
|
|
|
|
List<ShaderField> fields = new List<ShaderField>();
|
|
|
|
t.SkipWhitespace();
|
|
ZScriptToken token = t.ExpectToken(ZScriptTokenType.OpenCurly);
|
|
if (!(token?.IsValid ?? true))
|
|
throw new ShaderCompileException("Expected data block, got {0}", token?.ToString() ?? "<EOF>");
|
|
|
|
while (true)
|
|
{
|
|
|
|
t.SkipWhitespace();
|
|
token = t.ExpectToken(ZScriptTokenType.Identifier, ZScriptTokenType.CloseCurly);
|
|
if (!(token?.IsValid ?? true))
|
|
throw new ShaderCompileException("Expected data field or end of block, got {0}", token?.ToString() ?? "<EOF>");
|
|
|
|
if (token.Type == ZScriptTokenType.CloseCurly)
|
|
break;
|
|
|
|
ShaderField field = new ShaderField();
|
|
field.Line = t.PositionToLine(token.Position);
|
|
field.TypeName = token.Value;
|
|
|
|
CompileShaderField(field, t);
|
|
|
|
fields.Add(field);
|
|
|
|
}
|
|
|
|
return fields;
|
|
|
|
}
|
|
|
|
private static List<ZScriptToken> CompileShaderSource(ZScriptTokenizer t)
|
|
{
|
|
|
|
// syntax:
|
|
// fragment { ... code ... }
|
|
// or
|
|
// vertex { ... code ... }
|
|
|
|
t.SkipWhitespace();
|
|
ZScriptToken token = t.ExpectToken(ZScriptTokenType.OpenCurly);
|
|
if (!(token?.IsValid ?? true))
|
|
throw new ShaderCompileException("Expected shader source block, got {0}", token?.ToString() ?? "<EOF>");
|
|
|
|
List<ZScriptToken> tokens = ReadEverythingUntil(t, ZScriptTokenType.CloseCurly, false, false);
|
|
|
|
token = t.ExpectToken(ZScriptTokenType.CloseCurly);
|
|
if (!(token?.IsValid ?? true))
|
|
throw new ShaderCompileException("Expected end of shader source block, got {0}", token?.ToString() ?? "<EOF>");
|
|
|
|
return tokens;
|
|
|
|
}
|
|
|
|
private static void CompileShader(ShaderGroup output, ZScriptTokenizer t)
|
|
{
|
|
|
|
t.SkipWhitespace();
|
|
|
|
ZScriptToken token = t.ExpectToken(ZScriptTokenType.Identifier);
|
|
if (!(token?.IsValid ?? true))
|
|
throw new ShaderCompileException("Expected shader identifier, got {0}", token?.ToString() ?? "<EOF>");
|
|
|
|
t.SkipWhitespace();
|
|
|
|
Shader s = new Shader(output);
|
|
s.Name = token.Value;
|
|
output.Shaders.Add(s);
|
|
|
|
token = t.ExpectToken(ZScriptTokenType.Identifier, ZScriptTokenType.OpenCurly);
|
|
if (!(token?.IsValid ?? true))
|
|
throw new ShaderCompileException("Expected parent identifier or shader block, got {0}", token?.ToString() ?? "<EOF>");
|
|
|
|
// has parent shader id
|
|
if (token.Type == ZScriptTokenType.Identifier)
|
|
{
|
|
|
|
if (token.Value != "extends")
|
|
throw new ShaderCompileException("Expected 'extends', got {0}", token.ToString());
|
|
|
|
t.SkipWhitespace();
|
|
token = t.ExpectToken(ZScriptTokenType.Identifier);
|
|
if (!(token?.IsValid ?? true))
|
|
throw new ShaderCompileException("Expected parent identifier, got {0}", token?.ToString() ?? "<EOF>");
|
|
|
|
s.ParentName = token.Value;
|
|
|
|
t.SkipWhitespace();
|
|
token = t.ExpectToken(ZScriptTokenType.OpenCurly);
|
|
if (!(token?.IsValid ?? true))
|
|
throw new ShaderCompileException("Expected shader block, got {0}", token?.ToString() ?? "<EOF>");
|
|
|
|
}
|
|
|
|
|
|
s.CodeLine = t.PositionToLine(token.Position);
|
|
|
|
while (true)
|
|
{
|
|
|
|
t.SkipWhitespace();
|
|
token = t.ExpectToken(ZScriptTokenType.Identifier, ZScriptTokenType.CloseCurly);
|
|
if (!(token?.IsValid ?? true))
|
|
throw new ShaderCompileException("Expected shader sub-block or end of block, got {0}", token?.ToString() ?? "<EOF>");
|
|
|
|
if (token.Type == ZScriptTokenType.CloseCurly)
|
|
break;
|
|
|
|
switch (token.Value)
|
|
{
|
|
case "in":
|
|
s.In = CompileShaderDataBlock(t);
|
|
break;
|
|
case "out":
|
|
s.Out = CompileShaderDataBlock(t);
|
|
break;
|
|
case "v2f":
|
|
s.V2F = CompileShaderDataBlock(t);
|
|
break;
|
|
case "functions":
|
|
CompileShaderFunctions(s, t);
|
|
break;
|
|
case "vertex":
|
|
s.SourceVertex = CompileShaderSource(t);
|
|
if (s.SourceVertex != null && s.SourceVertex.Count > 0)
|
|
s.SourceVertexLine = t.PositionToLine(s.SourceVertex[0].Position);
|
|
break;
|
|
case "fragment":
|
|
s.SourceFragment = CompileShaderSource(t);
|
|
if (s.SourceFragment != null && s.SourceFragment.Count > 0)
|
|
s.SourceFragmentLine = t.PositionToLine(s.SourceFragment[0].Position);
|
|
break;
|
|
default:
|
|
throw new ShaderCompileException("Expected shader sub-block, got {0}", token.ToString());
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
public static ShaderGroup Compile(string src)
|
|
{
|
|
ShaderGroup output = new ShaderGroup();
|
|
|
|
using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(src)))
|
|
using (BinaryReader br = new BinaryReader(ms))
|
|
{
|
|
ZScriptTokenizer t = new ZScriptTokenizer(br);
|
|
|
|
// main cycle
|
|
// in the root scope, we allow three blocks:
|
|
// - uniforms{}
|
|
// - functions{}
|
|
// - shader <name> {}
|
|
// everything else is a syntax error.
|
|
while (true)
|
|
{
|
|
t.SkipWhitespace();
|
|
ZScriptToken token = t.ExpectToken(ZScriptTokenType.Identifier);
|
|
if (token == null)
|
|
break;
|
|
|
|
if (!token.IsValid)
|
|
throw new ShaderCompileException("Expected 'uniforms', 'functions', or 'shader'; got {0}", token.ToString());
|
|
|
|
switch (token.Value)
|
|
{
|
|
case "uniforms":
|
|
CompileUniforms(output, t);
|
|
break;
|
|
case "functions":
|
|
CompileFunctions(output, t);
|
|
break;
|
|
case "shader":
|
|
CompileShader(output, t);
|
|
break;
|
|
default:
|
|
throw new ShaderCompileException("Expected 'uniforms', 'functions', or 'shader'; got {0}", token.ToString());
|
|
}
|
|
}
|
|
|
|
// done parsing, postprocess - apply parents
|
|
foreach (Shader s in output.Shaders)
|
|
{
|
|
List<string> parents = new List<string>();
|
|
parents.Add(s.Name);
|
|
Shader p = s;
|
|
while (p.ParentName != null && p.ParentName != "")
|
|
{
|
|
string parentName = p.ParentName;
|
|
if (parents.Contains(parentName))
|
|
throw new ShaderCompileException("Recursive parent shader {0} found", parentName);
|
|
parents.Add(parentName);
|
|
p = output.GetShader(parentName);
|
|
if (p == null)
|
|
throw new ShaderCompileException("Parent shader {0} not found", parentName);
|
|
|
|
if (s.In == null) s.In = p.In;
|
|
if (s.Out == null) s.Out = p.Out;
|
|
if (s.V2F == null) s.V2F = p.V2F;
|
|
if (s.SourceFragment == null)
|
|
{
|
|
s.SourceFragment = p.SourceFragment;
|
|
s.SourceFragmentLine = p.SourceFragmentLine;
|
|
}
|
|
if (s.SourceVertex == null)
|
|
{
|
|
s.SourceVertex = p.SourceVertex;
|
|
s.SourceVertexLine = p.SourceVertexLine;
|
|
}
|
|
|
|
// add functions from parent
|
|
foreach (ShaderFunction func in p.Functions)
|
|
{
|
|
if (s.GetFunction(func.Name) == null)
|
|
s.Functions.Add(func);
|
|
}
|
|
}
|
|
}
|
|
|
|
return output;
|
|
}
|
|
}
|
|
}
|
|
}
|