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@ -22,6 +22,7 @@ import (
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"runtime/debug"
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"sync"
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"sync/atomic"
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"time"
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"unicode"
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"golang.org/x/mobile/app"
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@ -54,6 +55,7 @@ var (
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func init() {
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theUI.userInterfaceImpl = userInterfaceImpl{
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foreground: 1,
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runnableOnUnfocused: 0, // This is 0 for backward compatibility during v2 (#2576).
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graphicsDriverInitCh: make(chan struct{}),
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errCh: make(chan error),
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@ -73,7 +75,8 @@ func (u *userInterfaceImpl) Update() error {
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default:
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}
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if !u.IsFocused() {
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if !u.IsFocused() && !u.IsRunnableOnUnfocused() {
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time.Sleep(time.Second / 60)
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return nil
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}
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@ -102,6 +105,7 @@ type userInterfaceImpl struct {
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outsideHeight float64
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foreground int32
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runnableOnUnfocused int32
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errCh chan error
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// Used for gomobile-build
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@ -232,9 +236,11 @@ func (u *userInterfaceImpl) SetForeground(foreground bool) error {
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if foreground {
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return hooks.ResumeAudio()
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} else {
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}
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if !u.IsRunnableOnUnfocused() {
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return hooks.SuspendAudio()
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}
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return nil
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}
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func (u *userInterfaceImpl) Run(game Game, options *RunOptions) error {
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@ -395,11 +401,15 @@ func (u *userInterfaceImpl) IsFocused() bool {
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}
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func (u *userInterfaceImpl) IsRunnableOnUnfocused() bool {
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return false
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return atomic.LoadInt32(&u.runnableOnUnfocused) != 0
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}
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func (u *userInterfaceImpl) SetRunnableOnUnfocused(runnableOnUnfocused bool) {
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// Do nothing
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var v int32
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if runnableOnUnfocused {
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v = 1
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}
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atomic.StoreInt32(&u.runnableOnUnfocused, v)
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}
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func (u *userInterfaceImpl) SetFPSMode(mode FPSModeType) {
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6
run.go
6
run.go
@ -428,13 +428,13 @@ func IsRunnableOnUnfocused() bool {
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// SetRunnableOnUnfocused sets the state if the game runs even in background.
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//
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// If the given value is true, the game runs even in background e.g. when losing focus.
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// The initial state is true.
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// The initial state is true on desktops, and false on mobiles.
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// For mobiles, in addition to SetRunnableOnUnfocused, you might require some permission settings
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// not to pause audio when the application goes to background.
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//
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// Known issue: On browsers, even if the state is on, the game doesn't run in background tabs.
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// This is because browsers throttles background tabs not to often update.
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//
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// SetRunnableOnUnfocused does nothing on mobiles so far.
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//
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// SetRunnableOnUnfocused is concurrent-safe.
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func SetRunnableOnUnfocused(runnableOnUnfocused bool) {
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ui.Get().SetRunnableOnUnfocused(runnableOnUnfocused)
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