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https://github.com/ryujinx-mirror/ryujinx.git
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ee1038e542
* Initial support for shader attribute indexing * Support output indexing too, other improvements * Fix order * Address feedback
160 lines
5.6 KiB
C#
160 lines
5.6 KiB
C#
using Ryujinx.Graphics.Shader.CodeGen.Glsl.Instructions;
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using Ryujinx.Graphics.Shader.IntermediateRepresentation;
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using Ryujinx.Graphics.Shader.StructuredIr;
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using Ryujinx.Graphics.Shader.Translation;
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using System;
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using static Ryujinx.Graphics.Shader.CodeGen.Glsl.TypeConversion;
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namespace Ryujinx.Graphics.Shader.CodeGen.Glsl
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{
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static class GlslGenerator
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{
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private const string MainFunctionName = "main";
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public static string Generate(StructuredProgramInfo info, ShaderConfig config)
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{
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CodeGenContext context = new CodeGenContext(info, config);
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Declarations.Declare(context, info);
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if (info.Functions.Count != 0)
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{
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for (int i = 1; i < info.Functions.Count; i++)
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{
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context.AppendLine($"{GetFunctionSignature(info.Functions[i])};");
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}
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context.AppendLine();
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for (int i = 1; i < info.Functions.Count; i++)
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{
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PrintFunction(context, info, info.Functions[i]);
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context.AppendLine();
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}
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}
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PrintFunction(context, info, info.Functions[0], MainFunctionName);
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return context.GetCode();
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}
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private static void PrintFunction(CodeGenContext context, StructuredProgramInfo info, StructuredFunction function, string funcName = null)
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{
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context.CurrentFunction = function;
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context.AppendLine(GetFunctionSignature(function, funcName));
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context.EnterScope();
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Declarations.DeclareLocals(context, function);
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PrintBlock(context, function.MainBlock);
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context.LeaveScope();
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}
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private static string GetFunctionSignature(StructuredFunction function, string funcName = null)
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{
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string[] args = new string[function.InArguments.Length + function.OutArguments.Length];
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for (int i = 0; i < function.InArguments.Length; i++)
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{
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args[i] = $"{Declarations.GetVarTypeName(function.InArguments[i])} {OperandManager.GetArgumentName(i)}";
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}
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for (int i = 0; i < function.OutArguments.Length; i++)
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{
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int j = i + function.InArguments.Length;
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args[j] = $"out {Declarations.GetVarTypeName(function.OutArguments[i])} {OperandManager.GetArgumentName(j)}";
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}
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return $"{Declarations.GetVarTypeName(function.ReturnType)} {funcName ?? function.Name}({string.Join(", ", args)})";
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}
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private static void PrintBlock(CodeGenContext context, AstBlock block)
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{
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AstBlockVisitor visitor = new AstBlockVisitor(block);
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visitor.BlockEntered += (sender, e) =>
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{
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switch (e.Block.Type)
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{
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case AstBlockType.DoWhile:
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context.AppendLine("do");
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break;
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case AstBlockType.Else:
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context.AppendLine("else");
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break;
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case AstBlockType.ElseIf:
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context.AppendLine($"else if ({GetCondExpr(context, e.Block.Condition)})");
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break;
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case AstBlockType.If:
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context.AppendLine($"if ({GetCondExpr(context, e.Block.Condition)})");
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break;
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default: throw new InvalidOperationException($"Found unexpected block type \"{e.Block.Type}\".");
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}
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context.EnterScope();
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};
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visitor.BlockLeft += (sender, e) =>
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{
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context.LeaveScope();
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if (e.Block.Type == AstBlockType.DoWhile)
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{
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context.AppendLine($"while ({GetCondExpr(context, e.Block.Condition)});");
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}
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};
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foreach (IAstNode node in visitor.Visit())
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{
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if (node is AstOperation operation)
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{
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context.AppendLine(InstGen.GetExpression(context, operation) + ";");
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}
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else if (node is AstAssignment assignment)
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{
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VariableType srcType = OperandManager.GetNodeDestType(context, assignment.Source);
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VariableType dstType = OperandManager.GetNodeDestType(context, assignment.Destination);
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string dest;
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if (assignment.Destination is AstOperand operand && operand.Type == OperandType.Attribute)
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{
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dest = OperandManager.GetOutAttributeName(operand.Value, context.Config);
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}
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else
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{
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dest = InstGen.GetExpression(context, assignment.Destination);
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}
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string src = ReinterpretCast(context, assignment.Source, srcType, dstType);
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context.AppendLine(dest + " = " + src + ";");
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}
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else if (node is AstComment comment)
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{
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context.AppendLine("// " + comment.Comment);
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}
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else
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{
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throw new InvalidOperationException($"Found unexpected node type \"{node?.GetType().Name ?? "null"}\".");
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}
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}
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}
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private static string GetCondExpr(CodeGenContext context, IAstNode cond)
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{
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VariableType srcType = OperandManager.GetNodeDestType(context, cond);
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return ReinterpretCast(context, cond, srcType, VariableType.Bool);
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}
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}
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} |