/
Ast.hx
673 lines (612 loc) · 15.1 KB
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Ast.hx
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package hxsl;
enum BufferKind {
Uniform;
RW;
Partial;
RWPartial;
}
enum TexDimension {
T1D;
T2D;
T3D;
TCube;
}
enum Type {
TVoid;
TInt;
TBool;
TFloat;
TString;
TVec( size : Int, t : VecType );
TMat3;
TMat4;
TMat3x4;
TBytes( size : Int );
TSampler( dim : TexDimension, isArray : Bool );
TRWTexture( dim : TexDimension, isArray : Bool, channels : Int );
TMat2;
TStruct( vl : Array<TVar> );
TFun( variants : Array<FunType> );
TArray( t : Type, size : SizeDecl );
TBuffer( t : Type, size : SizeDecl, kind : BufferKind );
TChannel( size : Int );
}
enum VecType {
VInt;
VFloat;
VBool;
}
enum SizeDecl {
SConst( v : Int );
SVar( v : TVar );
}
typedef FunType = { args : Array<{ name : String, type : Type }>, ret : Type };
class Error {
public var msg : String;
public var pos : Position;
public function new( msg, pos ) {
this.msg = msg;
this.pos = pos;
}
public function toString() {
return "Error(" + msg + ")@" + pos;
}
public static function t( msg : String, pos : Position ) : Dynamic {
throw new Error(msg, pos);
return null;
}
}
typedef Position = haxe.macro.Expr.Position;
typedef Expr = { expr : ExprDef, pos : Position };
typedef Binop = haxe.macro.Expr.Binop;
typedef Unop = haxe.macro.Expr.Unop;
enum VarKind {
Global;
Input;
Param;
Var;
Local;
Output;
Function;
}
enum VarQualifier {
Const( ?max : Int );
Private;
Nullable;
PerObject;
Name( n : String );
Shared;
Precision( p : Prec );
Range( min : Float, max : Float );
Ignore; // the variable is ignored in reflection (inspector)
PerInstance( v : Int );
Doc( s : String );
Borrow( source : String );
Sampler( name : String );
Final;
}
enum Prec {
Low;
Medium;
High;
}
typedef VarDecl = {
var name : String;
var type : Null<Type>;
var kind : Null<VarKind>;
var qualifiers : Array<VarQualifier>;
var expr : Null<Expr>;
}
typedef FunDecl = {
var name : String;
var args : Array<VarDecl>;
var ret : Null<Type>;
var expr : Expr;
}
enum Const {
CNull;
CBool( b : Bool );
CInt( v : Int );
CFloat( v : Float );
CString( v : String );
}
enum ExprDef {
EConst( c : Const );
EIdent( i : String );
EParenthesis( e : Expr );
EField( e : Expr, f : String );
EBinop( op : Binop, e1 : Expr, e2 : Expr );
EUnop( op : Unop, e1 : Expr );
ECall( e : Expr, args : Array<Expr> );
EBlock( el : Array<Expr> );
EVars( v : Array<VarDecl> );
EFunction( f : FunDecl );
EIf( econd : Expr, eif : Expr, eelse : Null<Expr> );
EDiscard;
EFor( v : String, loop : Expr, block : Expr );
EReturn( ?e : Expr );
EBreak;
EContinue;
EArray( e : Expr, eindex : Expr );
EArrayDecl( el : Array<Expr> );
ESwitch( e : Expr, cases : Array<{ values : Array<Expr>, expr:Expr }>, def : Null<Expr> );
EWhile( cond : Expr, loop : Expr, normalWhile : Bool );
EMeta( name : String, args : Array<Expr>, e : Expr );
}
enum TExprDef {
TConst( c : Const );
TVar( v : TVar );
TGlobal( g : TGlobal );
TParenthesis( e : TExpr );
TBlock( el : Array<TExpr> );
TBinop( op : Binop, e1 : TExpr, e2 : TExpr );
TUnop( op : Unop, e1 : TExpr );
TVarDecl( v : TVar, ?init : TExpr );
TCall( e : TExpr, args : Array<TExpr> );
TSwiz( e : TExpr, regs : Array<Component> );
TIf( econd : TExpr, eif : TExpr, eelse : Null<TExpr> );
TDiscard;
TReturn( ?e : TExpr );
TFor( v : TVar, it : TExpr, loop : TExpr );
TContinue;
TBreak;
TArray( e : TExpr, index : TExpr );
TArrayDecl( el : Array<TExpr> );
TSwitch( e : TExpr, cases : Array<{ values : Array<TExpr>, expr:TExpr }>, def : Null<TExpr> );
TWhile( e : TExpr, loop : TExpr, normalWhile : Bool );
TMeta( m : String, args : Array<Const>, e : TExpr );
TField( e : TExpr, name : String );
}
typedef TVar = {
var id : Int;
var name : String;
var type : Type;
var kind : VarKind;
@:optional var parent : TVar;
@:optional var qualifiers : Null<Array<VarQualifier>>;
}
typedef TFunction = {
var kind : FunctionKind;
var ref : TVar;
var args : Array<TVar>;
var ret : Type;
var expr : TExpr;
}
enum FunctionKind {
Vertex;
Fragment;
Init;
Helper;
Main;
}
enum TGlobal {
Radians;
Degrees;
Sin;
Cos;
Tan;
Asin;
Acos;
Atan;
Pow;
Exp;
Log;
Exp2;
Log2;
Sqrt;
Inversesqrt;
Abs;
Sign;
Floor;
Ceil;
Fract;
Mod;
Min;
Max;
Clamp;
Mix;
Step;
Smoothstep;
Length;
Distance;
Dot;
Cross;
Normalize;
//Faceforward;
LReflect;
//Refract;
//MatrixCompMult;
//Any;
//All;
Texture;
TextureLod;
Texel;
TextureSize;
// ...other texture* operations
// constructors
ToInt;
ToFloat;
ToBool;
Vec2;
Vec3;
Vec4;
IVec2;
IVec3;
IVec4;
BVec2;
BVec3;
BVec4;
Mat2;
Mat3;
Mat4;
// extra (not in GLSL ES)
Mat3x4;
Saturate;
Pack;
Unpack;
PackNormal;
UnpackNormal;
ScreenToUv;
UvToScreen;
// extensions
DFdx;
DFdy;
Fwidth;
// debug / internal
ChannelRead;
ChannelReadLod;
ChannelFetch;
ChannelTextureSize;
Trace;
// instancing
VertexID;
InstanceID;
// gl globals
FragCoord;
FrontFacing;
// bit casting
FloatBitsToInt;
FloatBitsToUint;
IntBitsToFloat;
UintBitsToFloat;
RoundEven;
// compute
SetLayout;
ImageStore;
ComputeVar_GlobalInvocation;
ComputeVar_LocalInvocation;
ComputeVar_WorkGroup;
ComputeVar_LocalInvocationIndex;
//ComputeVar_NumWorkGroups - no DirectX support
//ComputeVar_WorkGroupSize - no DirectX support
}
enum Component {
X;
Y;
Z;
W;
}
typedef TExpr = { e : TExprDef, t : Type, p : Position }
typedef ShaderData = {
var name : String;
var vars : Array<TVar>;
var funs : Array<TFunction>;
}
class Tools {
static var UID = 0;
public static var SWIZ = Component.createAll();
public static var MAX_CHANNELS_BITS = 3;
public static var MAX_PARTIAL_MAPPINGS_BITS = 7;
public static function allocVarId() {
// in order to prevent compile time ids to conflict with runtime allocated ones
// let's use negative numbers for compile time ones
#if macro
return --UID;
#else
return ++UID;
#end
}
public static function getTexUVSize( dim : TexDimension, arr = false ) {
var size = switch( dim ) {
case T1D: 1;
case T2D: 2;
case T3D, TCube: 3;
}
if( arr ) size++;
return size;
}
public static function getDimSize( dim : TexDimension, arr = false ) {
var size = switch( dim ){
case T1D: 1;
case T2D, TCube: 2;
case T3D: 3;
}
if( arr ) size++;
return size;
}
public static function getName( v : TVar ) {
if( v.qualifiers == null )
return v.name;
for( q in v.qualifiers )
switch( q ) {
case Name(n): return n;
default:
}
return v.name;
}
public static function getDoc( v : TVar ) {
if ( v.qualifiers == null )
return null;
for ( q in v.qualifiers )
switch ( q ) {
case Doc(s): return s;
default:
}
return null;
}
public static function getConstBits( v : TVar ) {
switch( v.type ) {
case TBool:
return 1;
case TInt:
for( q in v.qualifiers )
switch( q ) {
case Const(n):
if( n != null ) {
var bits = 0;
while( n >= 1 << bits )
bits++;
return bits;
}
return 8;
default:
}
case TChannel(_):
return 3 + MAX_CHANNELS_BITS;
case TBuffer(_, _, Partial|RWPartial):
return MAX_PARTIAL_MAPPINGS_BITS;
default:
}
return 0;
}
public static function isConst( v : TVar ) {
if( v.type.match(TChannel(_)|TBuffer(_,_,Partial|RWPartial)) )
return true;
if( v.qualifiers != null )
for( q in v.qualifiers )
switch( q ) {
case Const(_): return true;
default:
}
return false;
}
public static function isStruct( v : TVar ) {
return switch( v.type ) { case TStruct(_): true; default: false; }
}
public static function isArray( v : TVar ) {
return switch( v.type ) { case TArray(_): true; default: false; }
}
public static function hasQualifier( v : TVar, q ) {
if( v.qualifiers != null )
for( q2 in v.qualifiers )
if( q2 == q )
return true;
return false;
}
public static function hasBorrowQualifier( v : TVar, path : String ) {
if ( v.qualifiers != null )
for( q in v.qualifiers )
switch (q) {
case Borrow(s): return path == s;
default:
}
return false;
}
public static function isTexture( t : Type ) {
return switch( t ) {
case TSampler(_), TChannel(_), TRWTexture(_):
true;
default:
false;
}
}
public static function toString( t : Type ) {
return switch( t ) {
case TVec(size, t):
var prefix = switch( t ) {
case VFloat: "";
case VInt: "i";
case VBool: "b";
}
prefix + "vec" + size;
case TStruct(vl):"{" + [for( v in vl ) v.name + " : " + toString(v.type)].join(",") + "}";
case TArray(t, s): toString(t) + "[" + (switch( s ) { case SConst(i): "" + i; case SVar(v): v.name; } ) + "]";
case TBuffer(t, s, k):
var prefix = switch( k ) {
case Uniform: "Buffer";
case RW: "RWBuffer";
case Partial: "PartialBuffer";
case RWPartial: "RWPartialBuffer";
};
prefix+" "+toString(t) + "[" + (switch( s ) { case SConst(i): "" + i; case SVar(v): v.name; } ) + "]";
case TBytes(n): "Bytes" + n;
case TSampler(dim, arr):
"Sampler"+dim.getName().substr(1)+(arr ? "Array":"");
case TRWTexture(dim, arr,dims):
"RWTexture"+dim.getName().substr(1)+(arr ? "Array":"")+"<"+(dims == 1 ? "Float" : "Vec"+dims)+">";
default: t.getName().substr(1);
}
}
public static function toType( t : VecType ) {
return switch( t ) {
case VFloat: TFloat;
case VBool: TBool;
case VInt: TInt;
};
}
public static function hasSideEffect( e : TExpr ) {
switch( e.e ) {
case TParenthesis(e):
return hasSideEffect(e);
case TBlock(el), TArrayDecl(el):
for( e in el )
if( hasSideEffect(e) )
return true;
return false;
case TBinop(OpAssign | OpAssignOp(_), _, _):
return true;
case TBinop(_, e1, e2):
return hasSideEffect(e1) || hasSideEffect(e2);
case TUnop(_, e1):
return hasSideEffect(e1);
case TSwiz(e, _):
return hasSideEffect(e);
case TIf(econd, eif, eelse):
return hasSideEffect(econd) || hasSideEffect(eif) || (eelse != null && hasSideEffect(eelse));
case TFor(_, it, loop):
return hasSideEffect(it) || hasSideEffect(loop);
case TArray(e, index):
return hasSideEffect(e) || hasSideEffect(index);
case TConst(_), TVar(_), TGlobal(_):
return false;
case TCall({ e : TGlobal(SetLayout) },_):
return true;
case TCall(e, pl):
switch( e.e ) {
case TGlobal(g) if( g != ImageStore ):
default:
return true;
}
for( p in pl )
if( hasSideEffect(p) )
return true;
return false;
case TVarDecl(_), TDiscard, TContinue, TBreak, TReturn(_):
return true;
case TSwitch(e, cases, def):
for( c in cases ) {
for( v in c.values ) if( hasSideEffect(v) ) return true;
if( hasSideEffect(c.expr) ) return true;
}
return hasSideEffect(e) || (def != null && hasSideEffect(def));
case TWhile(e, loop, _):
return hasSideEffect(e) || hasSideEffect(loop);
case TMeta(_, _, e):
return hasSideEffect(e);
case TField(e,_):
return hasSideEffect(e);
}
}
public static function iter( e : TExpr, f : TExpr -> Void ) {
switch( e.e ) {
case TParenthesis(e): f(e);
case TBlock(el): for( e in el ) f(e);
case TBinop(_, e1, e2): f(e1); f(e2);
case TUnop(_, e1): f(e1);
case TVarDecl(_,init): if( init != null ) f(init);
case TCall(e, args): f(e); for( a in args ) f(a);
case TSwiz(e, _): f(e);
case TIf(econd, eif, eelse): f(econd); f(eif); if( eelse != null ) f(eelse);
case TReturn(e): if( e != null ) f(e);
case TFor(_, it, loop): f(it); f(loop);
case TArray(e, index): f(e); f(index);
case TArrayDecl(el): for( e in el ) f(e);
case TSwitch(e, cases, def):
f(e);
for( c in cases ) {
for( v in c.values ) f(v);
f(c.expr);
}
if( def != null ) f(def);
case TWhile(e, loop, _):
f(e);
f(loop);
case TConst(_), TVar(_), TGlobal(_), TDiscard, TContinue, TBreak:
case TMeta(_, _, e): f(e);
case TField(e, _): f(e);
}
}
public static function map( e : TExpr, f : TExpr -> TExpr ) : TExpr {
var ed = switch( e.e ) {
case TParenthesis(e): TParenthesis(f(e));
case TBlock(el): TBlock([for( e in el ) f(e)]);
case TBinop(op, e1, e2): TBinop(op, f(e1), f(e2));
case TUnop(op, e1): TUnop(op, f(e1));
case TVarDecl(v,init): TVarDecl(v, if( init != null ) f(init) else null);
case TCall(e, args): TCall(f(e),[for( a in args ) f(a)]);
case TSwiz(e, c): TSwiz(f(e), c);
case TIf(econd, eif, eelse): TIf(f(econd),f(eif),if( eelse != null ) f(eelse) else null);
case TReturn(e): TReturn(if( e != null ) f(e) else null);
case TFor(v, it, loop): TFor(v, f(it), f(loop));
case TArray(e, index): TArray(f(e), f(index));
case TArrayDecl(el): TArrayDecl([for( e in el ) f(e)]);
case TSwitch(e, cases, def): TSwitch(f(e), [for( c in cases ) { values : [for( v in c.values ) f(v)], expr : f(c.expr) }], def == null ? null : f(def));
case TWhile(e, loop, normalWhile): TWhile(f(e), f(loop), normalWhile);
case TConst(_), TVar(_), TGlobal(_), TDiscard, TContinue, TBreak: e.e;
case TMeta(m, args, e): TMeta(m, args, f(e)); // don't map args
case TField(e, name): TField(f(e), name);
}
return { e : ed, t : e.t, p : e.p };
}
public static function size( t : Type ) {
return switch( t ) {
case TVoid: 0;
case TFloat, TInt: 1;
case TVec(n, _), TChannel(n): n;
case TStruct(vl):
var s = 0;
for( v in vl ) s += size(v.type);
return s;
case TMat2: 4;
case TMat3: 9;
case TMat4: 16;
case TMat3x4: 12;
case TBytes(s): s;
case TBool, TString, TSampler(_), TRWTexture(_), TFun(_): 0;
case TArray(t, SConst(v)), TBuffer(t, SConst(v),_): size(t) * v;
case TArray(_, SVar(_)), TBuffer(_): 0;
}
}
#if !macro
public static function evalConst( e : TExpr ) : Dynamic {
return switch( e.e ) {
case TConst(c):
switch( c ) {
case CNull: null;
case CBool(b): b;
case CInt(i): i;
case CFloat(f): f;
case CString(s): s;
}
case TCall({ e : TGlobal(Vec4) }, args):
var vals = [for( a in args ) evalConst(a)];
if( vals.length == 1 )
return new Types.Vec4(vals[0], vals[0], vals[0], vals[0]);
return new Types.Vec4(vals[0], vals[1], vals[2], vals[3]);
case TCall({ e : TGlobal(Vec2 | Vec3) }, args):
var vals = [for( a in args ) evalConst(a)];
if( vals.length == 1 )
return new Types.Vec(vals[0], vals[0], vals[0]);
return new Types.Vec(vals[0], vals[1], vals[2]);
default:
throw "Unhandled constant init " + Printer.toString(e);
}
}
#end
}
class Tools2 {
public static function toString( g : TGlobal ) {
var n = g.getName();
return n.charAt(0).toLowerCase() + n.substr(1);
}
}
class Tools3 {
public static function toString( s : ShaderData ) {
return Printer.shaderToString(s);
}
}
class Tools4 {
public static function toString( e : TExpr ) {
return Printer.toString(e);
}
}