mirror of
https://github.com/Ryujinx/Ryujinx.git
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133 lines
4.4 KiB
C#
133 lines
4.4 KiB
C#
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using Ryujinx.Graphics.Gal;
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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 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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public static GlslProgram Generate(StructuredProgramInfo info, ShaderConfig config)
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{
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CodeGenContext context = new CodeGenContext(config);
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Declarations.Declare(context, info);
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PrintMainBlock(context, info);
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return new GlslProgram(
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context.CBufferDescriptors.ToArray(),
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context.TextureDescriptors.ToArray(),
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context.GetCode());
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}
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private static void PrintMainBlock(CodeGenContext context, StructuredProgramInfo info)
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{
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context.AppendLine("void main()");
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context.EnterScope();
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Declarations.DeclareLocals(context, info);
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PrintBlock(context, info.MainBlock);
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context.LeaveScope();
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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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if (operation.Inst == Instruction.Return)
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{
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PrepareForReturn(context);
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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(assignment.Source);
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VariableType dstType = OperandManager.GetNodeDestType(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, context.Config.Type);
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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
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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(cond);
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return ReinterpretCast(context, cond, srcType, VariableType.Bool);
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}
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private static void PrepareForReturn(CodeGenContext context)
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{
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if (context.Config.Type == GalShaderType.Vertex)
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{
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context.AppendLine("gl_Position.xy *= flip;");
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}
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}
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}
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}
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