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devicescale: Panic on Android when called from init funcs

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This commit is contained in:
Hajime Hoshi 2018-05-05 03:15:17 +09:00
parent d8dba69b47
commit 167d21ec46
2 changed files with 2 additions and 3 deletions
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2
internal/devicescale/impl_android.go
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@ -65,7 +65,7 @@ import (
func impl() float64 {
if !jni.IsJVMAvailable() {
return 0
panic("devicescale: JVM is not available yet: is this called from init funcitons?")
}
s := 0.0
if err := jni.RunOnJVM(func(vm, env, ctx uintptr) error {

3
run.go
View File

@ -502,8 +502,7 @@ func SetWindowIcon(iconImages []image.Image) {
// DeviceScaleFactor returns a meaningful value on high-DPI display environment,
// otherwise DeviceScaleFactor returns 1.
//
// DeviceScaleFactor might return 0 on init function on some devices like Android.
// Don't expect DeviceScaleFactor returns a valid value until main starts.
// DeviceScaleFactor might panic on init function on some devices like Android.
// Then, it is not recommended to call DeviceScaleFactor from init functions.
//
// DeviceScaleFactor is concurrent-safe.