ebiten/internal/shaderir/program.go
2020-05-12 01:18:18 +09:00

112 lines
1.8 KiB
Go

// Copyright 2020 The Ebiten Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package shaderir
type Program struct {
Uniforms []Variable
Attributes []Variable
Varyings []Variable
Funcs []Func
VertexEntry string
FragmentEntry string
structNames map[string]string
structTypes []Type
}
type Variable struct {
Name string
Type Type
}
type Func struct {
Name string
InParams []Type
OutParams []Type
Block Block
}
type Block struct {
LocalVars []Type
Stmts []Stmt
}
type Stmt struct {
Type StmtType
Exprs []Expr
Condition Expr
ElseStmts []Expr
ForInit Expr
ForRest Expr
}
type StmtType int
const (
ExprStmt StmtType = iota
Assign
If
For
Continue
Break
Return
Discard
)
type Expr struct {
Type ExprType
Exprs []Expr
Value string
Op Op
}
type ExprType int
const (
Literal ExprType = iota
Ident
LocalVarID
Unary
Binary
Call
Selector
Index
)
type Op string
const (
Add Op = "+"
Sub Op = "-"
Neg Op = "!"
Mul Op = "*"
Div Op = "/"
Mod Op = "%"
LShift Op = "<<"
RShift Op = ">>"
LT Op = "<"
LE Op = "<="
GT Op = ">"
GE Op = ">="
Eq Op = "=="
NE Op = "!="
And Op = "&"
Xor Op = "^"
Or Op = "|"
AndAnd Op = "&&"
OrOr Op = "||"
Cond Op = "?:"
)