88 lines
1.7 KiB
Go
88 lines
1.7 KiB
Go
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// Copyright 2018 The Ebiten Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package hooks
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import (
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"sync"
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)
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var m sync.Mutex
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var onBeforeUpdateHooks = []func() error{}
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// AppendHookOnBeforeUpdate appends a hook function that is run before the main update function
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// every frame.
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func AppendHookOnBeforeUpdate(f func() error) {
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m.Lock()
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onBeforeUpdateHooks = append(onBeforeUpdateHooks, f)
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m.Unlock()
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}
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func RunBeforeUpdateHooks() error {
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m.Lock()
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defer m.Unlock()
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for _, f := range onBeforeUpdateHooks {
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if err := f(); err != nil {
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return err
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}
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}
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return nil
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}
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var (
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audioSuspended bool
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onSuspendAudio func() error
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onResumeAudio func() error
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)
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func OnSuspendAudio(f func() error) {
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m.Lock()
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onSuspendAudio = f
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m.Unlock()
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}
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func OnResumeAudio(f func() error) {
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m.Lock()
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onResumeAudio = f
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m.Unlock()
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}
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func SuspendAudio() error {
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m.Lock()
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defer m.Unlock()
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if audioSuspended {
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return nil
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}
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audioSuspended = true
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if onSuspendAudio != nil {
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return onSuspendAudio()
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}
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return nil
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}
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func ResumeAudio() error {
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m.Lock()
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defer m.Unlock()
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if !audioSuspended {
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return nil
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}
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audioSuspended = false
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if onResumeAudio != nil {
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return onResumeAudio()
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}
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return nil
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}
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