diff --git a/internal/ui/context.go b/internal/ui/context.go
index 85e77fc13..985d4a71f 100644
--- a/internal/ui/context.go
+++ b/internal/ui/context.go
@@ -16,8 +16,6 @@ package ui
 
 import (
 	"math"
-	"sync"
-	"sync/atomic"
 
 	"github.com/hajimehoshi/ebiten/v2/internal/atlas"
 	"github.com/hajimehoshi/ebiten/v2/internal/buffered"
@@ -235,81 +233,3 @@ func (c *context) adjustPosition(x, y float64, deviceScaleFactor float64) (float
 	}
 	return (x*deviceScaleFactor - ox) / s, (y*deviceScaleFactor - oy) / s
 }
-
-var theGlobalState = globalState{
-	isScreenClearedEveryFrame_: 1,
-}
-
-// globalState represents a global state in this package.
-// This is available even before the game loop starts.
-type globalState struct {
-	err_ error
-	errM sync.Mutex
-
-	fpsMode_                   int32
-	isScreenClearedEveryFrame_ int32
-	graphicsLibrary_           int32
-}
-
-func (g *globalState) error() error {
-	g.errM.Lock()
-	defer g.errM.Unlock()
-	return g.err_
-}
-
-func (g *globalState) setError(err error) {
-	g.errM.Lock()
-	defer g.errM.Unlock()
-	if g.err_ == nil {
-		g.err_ = err
-	}
-}
-
-func (g *globalState) fpsMode() FPSModeType {
-	return FPSModeType(atomic.LoadInt32(&g.fpsMode_))
-}
-
-func (g *globalState) setFPSMode(fpsMode FPSModeType) {
-	atomic.StoreInt32(&g.fpsMode_, int32(fpsMode))
-}
-
-func (g *globalState) isScreenClearedEveryFrame() bool {
-	return atomic.LoadInt32(&g.isScreenClearedEveryFrame_) != 0
-}
-
-func (g *globalState) setScreenClearedEveryFrame(cleared bool) {
-	v := int32(0)
-	if cleared {
-		v = 1
-	}
-	atomic.StoreInt32(&g.isScreenClearedEveryFrame_, v)
-}
-
-func (g *globalState) setGraphicsLibrary(library GraphicsLibrary) {
-	atomic.StoreInt32(&g.graphicsLibrary_, int32(library))
-}
-
-func (g *globalState) graphicsLibrary() GraphicsLibrary {
-	return GraphicsLibrary(atomic.LoadInt32(&g.graphicsLibrary_))
-}
-
-func FPSMode() FPSModeType {
-	return theGlobalState.fpsMode()
-}
-
-func SetFPSMode(fpsMode FPSModeType) {
-	theGlobalState.setFPSMode(fpsMode)
-	theUI.SetFPSMode(fpsMode)
-}
-
-func IsScreenClearedEveryFrame() bool {
-	return theGlobalState.isScreenClearedEveryFrame()
-}
-
-func SetScreenClearedEveryFrame(cleared bool) {
-	theGlobalState.setScreenClearedEveryFrame(cleared)
-}
-
-func GetGraphicsLibrary() GraphicsLibrary {
-	return theGlobalState.graphicsLibrary()
-}
diff --git a/internal/ui/globalstate.go b/internal/ui/globalstate.go
new file mode 100644
index 000000000..0b1f5c216
--- /dev/null
+++ b/internal/ui/globalstate.go
@@ -0,0 +1,98 @@
+// Copyright 2022 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 ui
+
+import (
+	"sync"
+	"sync/atomic"
+)
+
+var theGlobalState = globalState{
+	isScreenClearedEveryFrame_: 1,
+}
+
+// globalState represents a global state in this package.
+// This is available even before the game loop starts.
+type globalState struct {
+	err_ error
+	errM sync.Mutex
+
+	fpsMode_                   int32
+	isScreenClearedEveryFrame_ int32
+	graphicsLibrary_           int32
+}
+
+func (g *globalState) error() error {
+	g.errM.Lock()
+	defer g.errM.Unlock()
+	return g.err_
+}
+
+func (g *globalState) setError(err error) {
+	g.errM.Lock()
+	defer g.errM.Unlock()
+	if g.err_ == nil {
+		g.err_ = err
+	}
+}
+
+func (g *globalState) fpsMode() FPSModeType {
+	return FPSModeType(atomic.LoadInt32(&g.fpsMode_))
+}
+
+func (g *globalState) setFPSMode(fpsMode FPSModeType) {
+	atomic.StoreInt32(&g.fpsMode_, int32(fpsMode))
+}
+
+func (g *globalState) isScreenClearedEveryFrame() bool {
+	return atomic.LoadInt32(&g.isScreenClearedEveryFrame_) != 0
+}
+
+func (g *globalState) setScreenClearedEveryFrame(cleared bool) {
+	v := int32(0)
+	if cleared {
+		v = 1
+	}
+	atomic.StoreInt32(&g.isScreenClearedEveryFrame_, v)
+}
+
+func (g *globalState) setGraphicsLibrary(library GraphicsLibrary) {
+	atomic.StoreInt32(&g.graphicsLibrary_, int32(library))
+}
+
+func (g *globalState) graphicsLibrary() GraphicsLibrary {
+	return GraphicsLibrary(atomic.LoadInt32(&g.graphicsLibrary_))
+}
+
+func FPSMode() FPSModeType {
+	return theGlobalState.fpsMode()
+}
+
+func SetFPSMode(fpsMode FPSModeType) {
+	theGlobalState.setFPSMode(fpsMode)
+	theUI.SetFPSMode(fpsMode)
+}
+
+func IsScreenClearedEveryFrame() bool {
+	return theGlobalState.isScreenClearedEveryFrame()
+}
+
+func SetScreenClearedEveryFrame(cleared bool) {
+	theGlobalState.setScreenClearedEveryFrame(cleared)
+}
+
+func GetGraphicsLibrary() GraphicsLibrary {
+	return theGlobalState.graphicsLibrary()
+}