UI: support `NONE` Llama Tier in general settings

examples/llama.android/app/src/main/java/com/example/llama/ui/components/ArmFeaturesVisualizer.kt

@@ -1,10 +1,7 @@
 package com.example.llama.ui.components
 
-import android.content.Intent
 import android.llama.cpp.ArmFeature
-import android.llama.cpp.ArmFeaturesMapper
+import android.llama.cpp.ArmFeaturesMapper.DisplayItem
-import android.llama.cpp.LLamaTier
-import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.MaterialTheme
@@ -13,11 +10,8 @@ import androidx.compose.material3.SegmentedButton
 import androidx.compose.material3.SegmentedButtonDefaults
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.font.FontWeight
-import androidx.core.net.toUri
 import kotlin.math.sqrt
 
 /**
@@ -26,29 +20,21 @@ import kotlin.math.sqrt
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun ArmFeaturesVisualizer(
-    detectedTier: LLamaTier?,
+    supportedFeatures: List<DisplayItem>,
-    modifier: Modifier = Modifier,
     onFeatureClick: ((ArmFeature) -> Unit)? = null
-) {
-    val featuresData = remember(detectedTier) {
-        ArmFeaturesMapper.getFeatureDisplayData(detectedTier)
-    }
-
-    Column(
-        modifier = modifier.fillMaxWidth()
 ) {
     // Segmented Button Row for Features
     MultiChoiceSegmentedButtonRow(
         modifier = Modifier.fillMaxWidth()
     ) {
-            featuresData.forEachIndexed { index, item ->
+        supportedFeatures.forEachIndexed { index, item ->
             val weight = sqrt(item.feature.displayName.length.toFloat())
 
             SegmentedButton(
                 modifier = Modifier.weight(weight),
                 shape = SegmentedButtonDefaults.itemShape(
                     index = index,
-                        count = featuresData.size
+                    count = supportedFeatures.size
                 ),
                 icon = {},
                 onCheckedChange = { onFeatureClick?.invoke(item.feature) },
@@ -72,26 +58,3 @@ fun ArmFeaturesVisualizer(
         }
     }
 }
-}
-
-/**
- * Alternative version with clickable features that open ARM documentation.
- */
-@OptIn(ExperimentalMaterial3Api::class)
-@Composable
-fun ArmFeaturesVisualizerClickable(
-    detectedTier: LLamaTier?,
-    modifier: Modifier = Modifier
-) {
-    val context = LocalContext.current
-
-    ArmFeaturesVisualizer(
-        detectedTier = detectedTier,
-        modifier = modifier,
-        onFeatureClick = { feature ->
-            // Open ARM documentation in browser
-            val intent = Intent(Intent.ACTION_VIEW, feature.armDocUrl.toUri())
-            context.startActivity(intent)
-        }
-    )
-}

examples/llama.android/app/src/main/java/com/example/llama/ui/screens/SettingsGeneralScreen.kt

@@ -1,5 +1,8 @@
 package com.example.llama.ui.screens
 
+import android.content.Intent
+import android.llama.cpp.ArmFeaturesMapper
+import android.llama.cpp.ArmFeaturesMapper.DisplayItem
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
@@ -10,6 +13,7 @@ import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material3.Card
+import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.SegmentedButton
@@ -20,12 +24,15 @@ import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.unit.dp
+import androidx.core.net.toUri
 import com.example.llama.APP_NAME
 import com.example.llama.data.preferences.UserPreferences
-import com.example.llama.ui.components.ArmFeaturesVisualizerClickable
+import com.example.llama.ui.components.ArmFeaturesVisualizer
 import com.example.llama.viewmodel.SettingsViewModel
 
 /**
@@ -41,6 +48,10 @@ fun SettingsGeneralScreen(
     val themeMode by viewModel.themeMode.collectAsState()
     val detectedTier = viewModel.detectedTier
 
+    val supportedFeatures = remember(detectedTier) {
+        ArmFeaturesMapper.getFeatureDisplayData(detectedTier)
+    }
+
     Column(
         modifier = Modifier
             .fillMaxSize()
@@ -128,9 +139,11 @@ fun SettingsGeneralScreen(
             detectedTier?.let { tier ->
                 Spacer(modifier = Modifier.height(8.dp))
 
-                ArmFeaturesVisualizerClickable(detectedTier = detectedTier)
+                supportedFeatures?.let {
+                    ArmFeaturesVisualizerClickable(supportedFeatures = supportedFeatures)
 
                     Spacer(modifier = Modifier.height(8.dp))
+                }
 
                 Text(
                     text = "Optimization Tier: ${tier.name}",
@@ -224,3 +237,23 @@ fun SettingsSwitch(
         )
     }
 }
+
+/**
+ * Alternative version with clickable features that open ARM documentation.
+ */
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun ArmFeaturesVisualizerClickable(
+    supportedFeatures: List<DisplayItem>,
+) {
+    val context = LocalContext.current
+
+    ArmFeaturesVisualizer(
+        supportedFeatures = supportedFeatures,
+        onFeatureClick = { feature ->
+            // Open ARM documentation in browser
+            val intent = Intent(Intent.ACTION_VIEW, feature.armDocUrl.toUri())
+            context.startActivity(intent)
+        }
+    )
+}

examples/llama.android/llama/src/main/java/android/llama/cpp/ArmFeatures.kt

@@ -78,13 +78,15 @@ object ArmFeaturesMapper {
     /**
      * Gets the feature support data for UI display.
      */
-    fun getFeatureDisplayData(tier: LLamaTier?): List<DisplayItem> =
+    fun getFeatureDisplayData(tier: LLamaTier?): List<DisplayItem>? =
-        getSupportedFeatures(tier).let { flags ->
+        getSupportedFeatures(tier).let { optFlags ->
+            optFlags?.let { flags ->
                 allFeatures.mapIndexed { index, feature ->
                     DisplayItem(
                         feature = feature,
-                    isSupported = flags?.getOrElse(index) { false } == true
+                        isSupported = flags.getOrElse(index) { false }
                     )
                 }
             }
         }
+}