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// SPDX-FileCopyrightText: 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
package org.yuzu.yuzu_emu.model
import androidx.lifecycle.ViewModel
import androidx.lifecycle.viewModelScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.flow.MutableStateFlow
import kotlinx.coroutines.flow.SharingStarted
import kotlinx.coroutines.flow.StateFlow
import kotlinx.coroutines.flow.asStateFlow
import kotlinx.coroutines.flow.combine
import kotlinx.coroutines.flow.stateIn
import kotlinx.coroutines.launch
import kotlinx.coroutines.withContext
import org.yuzu.yuzu_emu.R
import org.yuzu.yuzu_emu.YuzuApplication
import org.yuzu.yuzu_emu.features.settings.model.StringSetting
import org.yuzu.yuzu_emu.features.settings.utils.SettingsFile
import org.yuzu.yuzu_emu.model.Driver.Companion.toDriver
import org.yuzu.yuzu_emu.utils.GpuDriverHelper
import org.yuzu.yuzu_emu.utils.GpuDriverMetadata
import org.yuzu.yuzu_emu.utils.NativeConfig
import java.io.File
class DriverViewModel : ViewModel() {
private val _areDriversLoading = MutableStateFlow(false)
private val _isDriverReady = MutableStateFlow(true)
private val _isDeletingDrivers = MutableStateFlow(false)
val isInteractionAllowed: StateFlow<Boolean> =
combine(
_areDriversLoading,
_isDriverReady,
_isDeletingDrivers
) { loading, ready, deleting ->
!loading && ready && !deleting
}.stateIn(viewModelScope, SharingStarted.WhileSubscribed(), initialValue = false)
var driverData = GpuDriverHelper.getDrivers()
private val _driverList = MutableStateFlow(emptyList<Driver>())
val driverList: StateFlow<List<Driver>> get() = _driverList
// Used for showing which driver is currently installed within the driver manager card
private val _selectedDriverTitle = MutableStateFlow("")
val selectedDriverTitle: StateFlow<String> get() = _selectedDriverTitle
private val _showClearButton = MutableStateFlow(false)
val showClearButton = _showClearButton.asStateFlow()
private val driversToDelete = mutableListOf<String>()
init {
updateDriverList()
updateDriverNameForGame(null)
}
fun reloadDriverData() {
_areDriversLoading.value = true
driverData = GpuDriverHelper.getDrivers()
updateDriverList()
_areDriversLoading.value = false
}
fun updateDriverList() {
val selectedDriver = GpuDriverHelper.customDriverSettingData
val systemDriverData = GpuDriverHelper.getSystemDriverInfo()
val newDriverList = mutableListOf(
Driver(
selectedDriver == GpuDriverMetadata(),
YuzuApplication.appContext.getString(R.string.system_gpu_driver),
systemDriverData?.get(0) ?: "",
systemDriverData?.get(1) ?: ""
)
)
driverData.forEach {
newDriverList.add(it.second.toDriver(it.second == selectedDriver))
}
_driverList.value = newDriverList
}
fun onOpenDriverManager(game: Game?) {
if (game != null) {
SettingsFile.loadCustomConfig(game)
}
updateDriverList()
}
fun showClearButton(value: Boolean) {
_showClearButton.value = value
}
fun onDriverSelected(position: Int) {
if (position == 0) {
StringSetting.DRIVER_PATH.setString("")
} else {
StringSetting.DRIVER_PATH.setString(driverData[position - 1].first)
}
}
fun onDriverRemoved(removedPosition: Int, selectedPosition: Int) {
driversToDelete.add(driverData[removedPosition - 1].first)
driverData.removeAt(removedPosition - 1)
onDriverSelected(selectedPosition)
}
fun onDriverAdded(driver: Pair<String, GpuDriverMetadata>) {
if (driversToDelete.contains(driver.first)) {
driversToDelete.remove(driver.first)
}
driverData.add(driver)
onDriverSelected(driverData.size)
}
fun onCloseDriverManager(game: Game?) {
_isDeletingDrivers.value = true
updateDriverNameForGame(game)
if (game == null) {
NativeConfig.saveGlobalConfig()
} else {
NativeConfig.savePerGameConfig()
NativeConfig.unloadPerGameConfig()
NativeConfig.reloadGlobalConfig()
}
viewModelScope.launch {
withContext(Dispatchers.IO) {
driversToDelete.forEach {
val driver = File(it)
if (driver.exists()) {
driver.delete()
}
}
driversToDelete.clear()
_isDeletingDrivers.value = false
}
}
}
// It is the Emulation Fragment's responsibility to load per-game settings so that this function
// knows what driver to load.
fun onLaunchGame() {
_isDriverReady.value = false
val selectedDriverFile = File(StringSetting.DRIVER_PATH.getString())
val selectedDriverMetadata = GpuDriverHelper.customDriverSettingData
if (GpuDriverHelper.installedCustomDriverData == selectedDriverMetadata) {
setDriverReady()
return
}
viewModelScope.launch {
withContext(Dispatchers.IO) {
if (selectedDriverMetadata.name == null) {
GpuDriverHelper.installDefaultDriver()
setDriverReady()
return@withContext
}
if (selectedDriverFile.exists()) {
GpuDriverHelper.installCustomDriver(selectedDriverFile)
} else {
GpuDriverHelper.installDefaultDriver()
}
setDriverReady()
}
}
}
fun updateDriverNameForGame(game: Game?) {
if (!GpuDriverHelper.supportsCustomDriverLoading()) {
return
}
if (game == null || NativeConfig.isPerGameConfigLoaded()) {
updateName()
} else {
SettingsFile.loadCustomConfig(game)
updateName()
NativeConfig.unloadPerGameConfig()
NativeConfig.reloadGlobalConfig()
}
}
private fun updateName() {
_selectedDriverTitle.value = GpuDriverHelper.customDriverSettingData.name
?: YuzuApplication.appContext.getString(R.string.system_gpu_driver)
}
private fun setDriverReady() {
_isDriverReady.value = true
updateName()
}
}
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