vendor dependencies, make some changes to how input is done

vendor/github.com/hajimehoshi/ebiten/v2/internal/hook/hook.go

@@ -0,0 +1,87 @@
+// Copyright 2018 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 hook
+
+import (
+	"sync"
+)
+
+var m sync.Mutex
+
+var onBeforeUpdateHooks []func() error
+
+// AppendHookOnBeforeUpdate appends a hook function that is run before the main update function
+// every tick.
+func AppendHookOnBeforeUpdate(f func() error) {
+	m.Lock()
+	onBeforeUpdateHooks = append(onBeforeUpdateHooks, f)
+	m.Unlock()
+}
+
+func RunBeforeUpdateHooks() error {
+	m.Lock()
+	defer m.Unlock()
+
+	for _, f := range onBeforeUpdateHooks {
+		if err := f(); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+var (
+	audioSuspended bool
+	onSuspendAudio func() error
+	onResumeAudio  func() error
+)
+
+func OnSuspendAudio(f func() error) {
+	m.Lock()
+	onSuspendAudio = f
+	m.Unlock()
+}
+
+func OnResumeAudio(f func() error) {
+	m.Lock()
+	onResumeAudio = f
+	m.Unlock()
+}
+
+func SuspendAudio() error {
+	m.Lock()
+	defer m.Unlock()
+	if audioSuspended {
+		return nil
+	}
+	audioSuspended = true
+	if onSuspendAudio != nil {
+		return onSuspendAudio()
+	}
+	return nil
+}
+
+func ResumeAudio() error {
+	m.Lock()
+	defer m.Unlock()
+	if !audioSuspended {
+		return nil
+	}
+	audioSuspended = false
+	if onResumeAudio != nil {
+		return onResumeAudio()
+	}
+	return nil
+}