diff --git a/gpu/gl/types.go b/gpu/gl/types.go
index 291001fa..f986bbab 100644
--- a/gpu/gl/types.go
+++ b/gpu/gl/types.go
@@ -14,22 +14,14 @@ type (
 	Object       struct{ V uint }
 )
 
-func (u Uniform) Valid() bool {
+func (u Uniform) valid() bool {
 	return u.V != -1
 }
 
-func (p Program) Valid() bool {
+func (p Program) valid() bool {
 	return p.V != 0
 }
 
-func (s Shader) Valid() bool {
+func (s Shader) valid() bool {
 	return s.V != 0
 }
-
-func (t Texture) Valid() bool {
-	return t.V != 0
-}
-
-func (t Texture) Equal(t2 Texture) bool {
-	return t == t2
-}
diff --git a/gpu/gl/types_js.go b/gpu/gl/types_js.go
index 8f0419a8..16e3a713 100644
--- a/gpu/gl/types_js.go
+++ b/gpu/gl/types_js.go
@@ -16,22 +16,14 @@ type (
 	Object       js.Value
 )
 
-func (p Program) Valid() bool {
+func (p Program) valid() bool {
 	return !js.Value(p).IsUndefined() && !js.Value(p).IsNull()
 }
 
-func (s Shader) Valid() bool {
+func (s Shader) valid() bool {
 	return !js.Value(s).IsUndefined() && !js.Value(s).IsNull()
 }
 
-func (u Uniform) Valid() bool {
+func (u Uniform) valid() bool {
 	return !js.Value(u).IsUndefined() && !js.Value(u).IsNull()
 }
-
-func (t Texture) Valid() bool {
-	return !js.Value(t).IsUndefined() && !js.Value(t).IsNull()
-}
-
-func (t Texture) Equal(t2 Texture) bool {
-	return js.Value(t).Equal(js.Value(t2))
-}
diff --git a/gpu/gl/util.go b/gpu/gl/util.go
index 17e95980..7a7afa77 100644
--- a/gpu/gl/util.go
+++ b/gpu/gl/util.go
@@ -20,7 +20,7 @@ func CreateProgram(ctx Functions, vsSrc, fsSrc string, attribs []string) (Progra
 	}
 	defer ctx.DeleteShader(fs)
 	prog := ctx.CreateProgram()
-	if !prog.Valid() {
+	if !prog.valid() {
 		return Program{}, errors.New("glCreateProgram failed")
 	}
 	ctx.AttachShader(prog, vs)
@@ -39,7 +39,7 @@ func CreateProgram(ctx Functions, vsSrc, fsSrc string, attribs []string) (Progra
 
 func GetUniformLocation(ctx Functions, prog Program, name string) Uniform {
 	loc := ctx.GetUniformLocation(prog, name)
-	if !loc.Valid() {
+	if !loc.valid() {
 		panic(fmt.Errorf("uniform %s not found", name))
 	}
 	return loc
@@ -47,7 +47,7 @@ func GetUniformLocation(ctx Functions, prog Program, name string) Uniform {
 
 func createShader(ctx Functions, typ Enum, src string) (Shader, error) {
 	sh := ctx.CreateShader(typ)
-	if !sh.Valid() {
+	if !sh.valid() {
 		return Shader{}, errors.New("glCreateShader failed")
 	}
 	ctx.ShaderSource(sh, src)