shaderir: Add func params

internal/shaderir/glsl.go

@@ -80,8 +80,27 @@ func (p *Program) glslVarDecl(t *Type, varname string) string {
 }
 
 func (p *Program) glslFunc(f *Func) []string {
+	var args []string
+	var idx int
+	for _, t := range f.InParams {
+		args = append(args, "in "+p.glslVarDecl(&t, fmt.Sprintf("l%d", idx)))
+		idx++
+	}
+	for _, t := range f.InOutParams {
+		args = append(args, "inout "+p.glslVarDecl(&t, fmt.Sprintf("l%d", idx)))
+		idx++
+	}
+	for _, t := range f.OutParams {
+		args = append(args, "out "+p.glslVarDecl(&t, fmt.Sprintf("l%d", idx)))
+		idx++
+	}
+	argsstr := "void"
+	if len(args) > 0 {
+		argsstr = strings.Join(args, ", ")
+	}
+
 	return []string{
-		fmt.Sprintf(`void %s(void) {`, f.Name),
+		fmt.Sprintf(`void %s(%s) {`, f.Name, argsstr),
 		`}`,
 	}
 }

internal/shaderir/ir_test.go

@@ -90,7 +90,7 @@ attribute vec2 A0;
 varying vec3 V0;`,
 		},
 		{
-			Name: "Function",
+			Name: "Func",
 			Program: Program{
 				Funcs: []Func{
 					{
@@ -99,6 +99,29 @@ varying vec3 V0;`,
 				},
 			},
 			Glsl: `void F0(void) {
+}`,
+		},
+		{
+			Name: "FuncParams",
+			Program: Program{
+				Funcs: []Func{
+					{
+						Name: "F0",
+						InParams: []Type{
+							{Main: Float},
+							{Main: Vec2},
+							{Main: Vec4},
+						},
+						InOutParams: []Type{
+							{Main: Mat2},
+						},
+						OutParams: []Type{
+							{Main: Mat4},
+						},
+					},
+				},
+			},
+			Glsl: `void F0(in float l0, in vec2 l1, in vec4 l2, inout mat2 l3, out mat4 l4) {
 }`,
 		},
 	}

internal/shaderir/program.go

@@ -34,6 +34,7 @@ type Variable struct {
 type Func struct {
 	Name        string
 	InParams    []Type
+	InOutParams []Type
 	OutParams   []Type
 	Block       Block
 }