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using System.Collections.Generic;
namespace Ryujinx.Graphics.Gal.Shader
{
class GlslDecl
{
public const int VertexIdAttr = 0x2fc;
public const int GlPositionWAttr = 0x7c;
private const int AttrStartIndex = 8;
private const int TexStartIndex = 8;
public const string PositionOutAttrName = "position";
private const string InAttrName = "in_attr";
private const string OutAttrName = "out_attr";
private const string UniformName = "c";
private const string GprName = "gpr";
private const string PredName = "pred";
private const string TextureName = "tex";
public const string FragmentOutputName = "FragColor";
private string[] StagePrefixes = new string[] { "vp", "tcp", "tep", "gp", "fp" };
private string StagePrefix;
private Dictionary<int, ShaderDeclInfo> m_Textures;
private Dictionary<(int, int), ShaderDeclInfo> m_Uniforms;
private Dictionary<int, ShaderDeclInfo> m_InAttributes;
private Dictionary<int, ShaderDeclInfo> m_OutAttributes;
private Dictionary<int, ShaderDeclInfo> m_Gprs;
private Dictionary<int, ShaderDeclInfo> m_Preds;
public IReadOnlyDictionary<int, ShaderDeclInfo> Textures => m_Textures;
public IReadOnlyDictionary<(int, int), ShaderDeclInfo> Uniforms => m_Uniforms;
public IReadOnlyDictionary<int, ShaderDeclInfo> InAttributes => m_InAttributes;
public IReadOnlyDictionary<int, ShaderDeclInfo> OutAttributes => m_OutAttributes;
public IReadOnlyDictionary<int, ShaderDeclInfo> Gprs => m_Gprs;
public IReadOnlyDictionary<int, ShaderDeclInfo> Preds => m_Preds;
public GalShaderType ShaderType { get; private set; }
public GlslDecl(ShaderIrNode[] Nodes, GalShaderType ShaderType)
{
this.ShaderType = ShaderType;
StagePrefix = StagePrefixes[(int)ShaderType] + "_";
m_Uniforms = new Dictionary<(int, int), ShaderDeclInfo>();
m_Textures = new Dictionary<int, ShaderDeclInfo>();
m_InAttributes = new Dictionary<int, ShaderDeclInfo>();
m_OutAttributes = new Dictionary<int, ShaderDeclInfo>();
m_Gprs = new Dictionary<int, ShaderDeclInfo>();
m_Preds = new Dictionary<int, ShaderDeclInfo>();
if (ShaderType == GalShaderType.Fragment)
{
m_Gprs.Add(0, new ShaderDeclInfo(FragmentOutputName, 0, 0, 4));
m_InAttributes.Add(7, new ShaderDeclInfo(PositionOutAttrName, -1, 0, 4));
}
else
{
m_OutAttributes.Add(7, new ShaderDeclInfo("gl_Position", -1, 0, 4));
}
foreach (ShaderIrNode Node in Nodes)
{
Traverse(null, Node);
}
}
private void Traverse(ShaderIrNode Parent, ShaderIrNode Node)
{
switch (Node)
{
case ShaderIrAsg Asg:
{
Traverse(Asg, Asg.Dst);
Traverse(Asg, Asg.Src);
break;
}
case ShaderIrCond Cond:
{
Traverse(Cond, Cond.Pred);
Traverse(Cond, Cond.Child);
break;
}
case ShaderIrOp Op:
{
Traverse(Op, Op.OperandA);
Traverse(Op, Op.OperandB);
Traverse(Op, Op.OperandC);
if (Op.Inst == ShaderIrInst.Texq ||
Op.Inst == ShaderIrInst.Texs ||
Op.Inst == ShaderIrInst.Txlf)
{
int Handle = ((ShaderIrOperImm)Op.OperandC).Value;
int Index = Handle - TexStartIndex;
string Name = StagePrefix + TextureName + Index;
m_Textures.TryAdd(Handle, new ShaderDeclInfo(Name, Handle));
}
break;
}
case ShaderIrOperCbuf Cbuf:
{
string Name = StagePrefix + UniformName + Cbuf.Index + "_" + Cbuf.Offs;
ShaderDeclInfo DeclInfo = new ShaderDeclInfo(Name, Cbuf.Offs, Cbuf.Index);
m_Uniforms.TryAdd((Cbuf.Index, Cbuf.Offs), DeclInfo);
break;
}
case ShaderIrOperAbuf Abuf:
{
//This is a built-in input variable.
if (Abuf.Offs == VertexIdAttr)
{
break;
}
int Index = Abuf.Offs >> 4;
int Elem = (Abuf.Offs >> 2) & 3;
int GlslIndex = Index - AttrStartIndex;
ShaderDeclInfo DeclInfo;
if (Parent is ShaderIrAsg Asg && Asg.Dst == Node)
{
if (!m_OutAttributes.TryGetValue(Index, out DeclInfo))
{
DeclInfo = new ShaderDeclInfo(OutAttrName + GlslIndex, GlslIndex);
m_OutAttributes.Add(Index, DeclInfo);
}
}
else
{
if (!m_InAttributes.TryGetValue(Index, out DeclInfo))
{
DeclInfo = new ShaderDeclInfo(InAttrName + GlslIndex, GlslIndex);
m_InAttributes.Add(Index, DeclInfo);
}
}
DeclInfo.Enlarge(Elem + 1);
break;
}
case ShaderIrOperGpr Gpr:
{
if (!Gpr.IsConst && !HasName(m_Gprs, Gpr.Index))
{
string Name = GprName + Gpr.Index;
m_Gprs.TryAdd(Gpr.Index, new ShaderDeclInfo(Name, Gpr.Index));
}
break;
}
case ShaderIrOperPred Pred:
{
if (!Pred.IsConst && !HasName(m_Preds, Pred.Index))
{
string Name = PredName + Pred.Index;
m_Preds.TryAdd(Pred.Index, new ShaderDeclInfo(Name, Pred.Index));
}
break;
}
}
}
private bool HasName(Dictionary<int, ShaderDeclInfo> Decls, int Index)
{
int VecIndex = Index >> 2;
if (Decls.TryGetValue(VecIndex, out ShaderDeclInfo DeclInfo))
{
if (DeclInfo.Size > 1 && Index < VecIndex + DeclInfo.Size)
{
return true;
}
}
return Decls.ContainsKey(Index);
}
}
}
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