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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.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.utils.FileUtil
import org.yuzu.yuzu_emu.utils.GpuDriverHelper
import org.yuzu.yuzu_emu.utils.GpuDriverMetadata
import org.yuzu.yuzu_emu.utils.NativeConfig
import java.io.BufferedOutputStream
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)
private val _driverList = MutableStateFlow(GpuDriverHelper.getDrivers())
val driverList: StateFlow<MutableList<Pair<String, GpuDriverMetadata>>> get() = _driverList
var previouslySelectedDriver = 0
var selectedDriver = -1
// 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 _newDriverInstalled = MutableStateFlow(false)
val newDriverInstalled: StateFlow<Boolean> get() = _newDriverInstalled
val driversToDelete = mutableListOf<String>()
init {
val currentDriverMetadata = GpuDriverHelper.installedCustomDriverData
findSelectedDriver(currentDriverMetadata)
// If a user had installed a driver before the manager was implemented, this zips
// the installed driver to UserData/gpu_drivers/CustomDriver.zip so that it can
// be indexed and exported as expected.
if (selectedDriver == -1) {
val driverToSave =
File(GpuDriverHelper.driverStoragePath, "CustomDriver.zip")
driverToSave.createNewFile()
FileUtil.zipFromInternalStorage(
File(GpuDriverHelper.driverInstallationPath!!),
GpuDriverHelper.driverInstallationPath!!,
BufferedOutputStream(driverToSave.outputStream())
)
_driverList.value.add(Pair(driverToSave.path, currentDriverMetadata))
setSelectedDriverIndex(_driverList.value.size - 1)
}
// If a user had installed a driver before the config was reworked to be multiplatform,
// we have save the path of the previously selected driver to the new setting.
if (StringSetting.DRIVER_PATH.getString(true).isEmpty() && selectedDriver > 0 &&
StringSetting.DRIVER_PATH.global
) {
StringSetting.DRIVER_PATH.setString(_driverList.value[selectedDriver].first)
NativeConfig.saveGlobalConfig()
} else {
findSelectedDriver(GpuDriverHelper.customDriverSettingData)
}
updateDriverNameForGame(null)
}
fun setSelectedDriverIndex(value: Int) {
if (selectedDriver != -1) {
previouslySelectedDriver = selectedDriver
}
selectedDriver = value
}
fun setNewDriverInstalled(value: Boolean) {
_newDriverInstalled.value = value
}
fun addDriver(driverData: Pair<String, GpuDriverMetadata>) {
val driverIndex = _driverList.value.indexOfFirst { it == driverData }
if (driverIndex == -1) {
_driverList.value.add(driverData)
setSelectedDriverIndex(_driverList.value.size - 1)
_selectedDriverTitle.value = driverData.second.name
?: YuzuApplication.appContext.getString(R.string.system_gpu_driver)
} else {
setSelectedDriverIndex(driverIndex)
}
}
fun removeDriver(driverData: Pair<String, GpuDriverMetadata>) {
_driverList.value.remove(driverData)
}
fun onOpenDriverManager(game: Game?) {
if (game != null) {
SettingsFile.loadCustomConfig(game)
}
val driverPath = StringSetting.DRIVER_PATH.getString()
if (driverPath.isEmpty()) {
setSelectedDriverIndex(0)
} else {
findSelectedDriver(GpuDriverHelper.getMetadataFromZip(File(driverPath)))
}
}
fun onCloseDriverManager(game: Game?) {
_isDeletingDrivers.value = true
StringSetting.DRIVER_PATH.setString(driverList.value[selectedDriver].first)
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) {
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()
}
}
}
private fun findSelectedDriver(currentDriverMetadata: GpuDriverMetadata) {
if (driverList.value.size == 1) {
setSelectedDriverIndex(0)
return
}
driverList.value.forEachIndexed { i: Int, driver: Pair<String, GpuDriverMetadata> ->
if (driver.second == currentDriverMetadata) {
setSelectedDriverIndex(i)
return
}
}
}
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
_selectedDriverTitle.value = GpuDriverHelper.customDriverSettingData.name
?: YuzuApplication.appContext.getString(R.string.system_gpu_driver)
}
}
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