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Add comments to DeviceScale

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Hajime Hoshi 2018-01-03 16:52:41 +09:00
parent 5a17497723
commit 7ba811e5ba
1 changed files with 16 additions and 0 deletions
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16
run.go
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@ -104,6 +104,11 @@ func (u *updater) Invalidate() {
//
// A window size is based on the given values (width, height and scale).
// scale is used to enlarge the screen.
// Note that the actual screen is multiplied not only by the given scale but also
// by the device scale on high-DPI display.
// If you pass inverse of the device scale,
// you can disable this automatical device scaling as a result.
// You can get the device scale by DeviceScale function.
//
// Run must be called from the OS main thread.
// Note that Ebiten bounds the main goroutine to the main OS thread by runtime.LockOSThread.
@ -175,6 +180,12 @@ func SetScreenSize(width, height int) {
// SetScreenScale changes the scale of the screen.
//
// Note that the actual screen is multiplied not only by the given scale but also
// by the device scale on high-DPI display.
// If you pass inverse of the device scale,
// you can disable this automatical device scaling as a result.
// You can get the device scale by DeviceScale function.
//
// This function is concurrent-safe.
func SetScreenScale(scale float64) {
if scale <= 0 {
@ -285,6 +296,11 @@ func SetWindowIcon(iconImages []image.Image) {
ui.SetWindowIcon(iconImages)
}
// DeviceScale returns a device scale value.
//
// This returns a meaningful value on high-DPI display environment.
//
// This function is concurrent-safe.
func DeviceScale() float64 {
return devicescale.DeviceScale()
}