Initial implementation wallpaper blur

build.gradle

@@ -416,6 +416,8 @@ dependencies {
     implementation('com.kieronquinn.smartspacer:sdk-client:1.0.11') {
         exclude group: "com.github.skydoves", module: "balloon"
     }
+
+    implementation("com.github.android:renderscript-intrinsics-replacement-toolkit:b6363490c3")
 }
 
 ksp {

lawnchair/res/values/strings.xml

@@ -470,6 +470,10 @@
     <string name="home_screen_rotation_label">Home screen rotation</string>
     <string name="home_screen_rotation_description">Allow home screen rotation when device is rotated</string>
 
+    <string name="wallpaper_blur">Enable wallpaper blur</string>
+    <string name="wallpaper_background_blur">Blur intensity</string>
+    <string name="wallpaper_background_blur_factor">Factor threshold</string>
+
     <string name="auto_add_shortcuts_label">Add new apps to home screen</string>
 
     <string name="minus_one_enable">Show feed</string>
@@ -524,7 +528,7 @@
     <string name="hotseat_mode_lawnchair" translatable="false">Lawnchair</string>
     <string name="hotseat_mode_google_search">Google Search bar</string>
 
-    <string name="search_background_transparency">Tranparency</string>
+    <string name="search_background_transparency">Opacity</string>
     <string name="corner_radius_label">Corner radius</string>
     <string name="apply_accent_color_label">Apply accent color</string>
     <string name="search_provider">Search provider</string>

lawnchair/src/app/lawnchair/preferences/PreferenceManager.kt

@@ -96,6 +96,10 @@ class PreferenceManager private constructor(private val context: Context) : Base
     val hotseatQsbCornerRadius = FloatPref("pref_hotseatQsbCornerRadius", 1F, recreate)
     val searchBackgroundHotseatTransparency = IntPref("pref_searchHotseatTranparency", 0, recreate)
 
+    val enableWallpaperBlur = BoolPref("pref_enableWallpaperBlur", false, recreate)
+    val wallpaperBlur = IntPref("pref_wallpaperBlur", 25, recreate)
+    val wallpaperBlurFactorThreshold = IntPref("pref_wallpaperBlurFactor", 25, recreate)
+
     val recentsActionScreenshot = BoolPref("pref_recentsActionScreenshot", !isOnePlusStock)
     val recentsActionShare = BoolPref("pref_recentsActionShare", isOnePlusStock)
     val recentsActionLens = BoolPref("pref_recentsActionLens", true)

lawnchair/src/app/lawnchair/ui/preferences/destinations/HomeScreenPreferences.kt

@@ -107,6 +107,31 @@ fun HomeScreenPreferences(
                 adapter = prefs2.showTopShadow.getAdapter(),
                 label = stringResource(id = R.string.show_sys_ui_scrim),
             )
+
+            val enableWallpaperBlur = prefs.enableWallpaperBlur.getAdapter()
+
+            SwitchPreference(
+                adapter = enableWallpaperBlur,
+                label = stringResource(id = R.string.wallpaper_blur),
+            )
+            ExpandAndShrink(visible = enableWallpaperBlur.state.value) {
+                SliderPreference(
+                    label = stringResource(id = R.string.wallpaper_background_blur),
+                    adapter = prefs.wallpaperBlur.getAdapter(),
+                    step = 5,
+                    valueRange = 0..100,
+                    showUnit = "%",
+                )
+            }
+            ExpandAndShrink(visible = enableWallpaperBlur.state.value) {
+                SliderPreference(
+                    label = stringResource(id = R.string.wallpaper_background_blur_factor),
+                    adapter = prefs.wallpaperBlurFactorThreshold.getAdapter(),
+                    step = 5,
+                    valueRange = 0..100,
+                    showUnit = "%",
+                )
+            }
         }
         PreferenceGroup(heading = stringResource(id = R.string.layout)) {
             val columns by prefs.workspaceColumns.getAdapter()

lawnchair/src/app/lawnchair/util/LawnchairUtils.kt

@@ -29,9 +29,15 @@ import android.content.pm.PackageManager
 import android.content.pm.ResolveInfo
 import android.content.res.Resources
 import android.graphics.Bitmap
+import android.graphics.Canvas
+import android.graphics.Paint
+import android.graphics.RectF
+import android.graphics.drawable.BitmapDrawable
+import android.graphics.drawable.Drawable
 import android.net.Uri
 import android.os.Looper
 import android.provider.OpenableColumns
+import android.util.Log
 import android.util.Size
 import android.view.View
 import android.widget.TextView
@@ -45,6 +51,7 @@ import com.android.launcher3.Utilities
 import com.android.launcher3.util.Executors.MAIN_EXECUTOR
 import com.android.launcher3.util.Themes
 import com.android.systemui.shared.system.QuickStepContract
+import com.google.android.renderscript.Toolkit
 import com.patrykmichalik.opto.core.firstBlocking
 import java.util.concurrent.Callable
 import java.util.concurrent.ExecutionException
@@ -245,3 +252,41 @@ fun Context.getDefaultResolveInfo(): ResolveInfo? {
     val intent = Intent(Intent.ACTION_MAIN).addCategory(Intent.CATEGORY_HOME)
     return packageManager.resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY)
 }
+
+fun Drawable.toBitmap(): Bitmap {
+    if (this is BitmapDrawable) {
+        return bitmap
+    }
+
+    val bitmap = Bitmap.createBitmap(
+        intrinsicWidth.takeIf { it > 0 } ?: 1,
+        intrinsicHeight.takeIf { it > 0 } ?: 1,
+        Bitmap.Config.ARGB_8888,
+    )
+    val canvas = Canvas(bitmap)
+    setBounds(0, 0, canvas.width, canvas.height)
+    draw(canvas)
+
+    return bitmap
+}
+
+fun createRoundedBitmap(color: Int, cornerRadius: Float): Bitmap {
+    val bitmap = Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888)
+    val canvas = Canvas(bitmap)
+    val paint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
+        this.color = color
+    }
+    val rect = RectF(0f, 0f, canvas.width.toFloat(), canvas.height.toFloat())
+    canvas.drawRoundRect(rect, cornerRadius, cornerRadius, paint)
+    return bitmap
+}
+
+fun blurBitmap(source: Bitmap, percent: Int, factorThreshold: Int = 25): Bitmap {
+    try {
+        val factor = percent.toFloat().div(100f) * factorThreshold
+        return Toolkit.blur(source, factor.toInt())
+    } catch (e: Exception) {
+        Log.e("LawnchairUtil", "Error bluring bitmap: $e")
+        return source
+    }
+}

quickstep/src/com/android/quickstep/views/RecentsView.java

@@ -6249,6 +6249,7 @@ public abstract class RecentsView<ACTIVITY_TYPE extends StatefulActivity<STATE_T
     }
 
     public float getScrollScale(RemoteTargetHandle rth) {
+        if (mPageScrolls == null) return 1f;
         int childCount = Math.min(mPageScrolls.length, getChildCount());
         for (int i = 0; i < childCount; i++) {
             View child = getChildAt(i);

src/com/android/launcher3/Workspace.java

@@ -35,6 +35,8 @@ import static com.android.launcher3.logging.StatsLogManager.LAUNCHER_STATE_HOME;
 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_SWIPELEFT;
 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_SWIPERIGHT;
 
+import static app.lawnchair.util.LawnchairUtilsKt.toBitmap;
+
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.animation.LayoutTransition;
@@ -50,6 +52,7 @@ import android.graphics.Bitmap;
 import android.graphics.Point;
 import android.graphics.PointF;
 import android.graphics.Rect;
+import android.graphics.drawable.BitmapDrawable;
 import android.graphics.drawable.Drawable;
 import android.os.Handler;
 import android.os.Message;
@@ -69,6 +72,7 @@ import android.widget.Toast;
 
 import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;
+import androidx.core.graphics.drawable.DrawableKt;
 
 import com.android.launcher3.Utilities;
 import com.android.app.animation.Interpolators;
@@ -128,6 +132,7 @@ import com.android.launcher3.widget.WidgetManagerHelper;
 import com.android.launcher3.widget.dragndrop.AppWidgetHostViewDragListener;
 import com.android.launcher3.widget.util.WidgetSizes;
 import com.android.systemui.plugins.shared.LauncherOverlayManager.LauncherOverlay;
+import com.google.android.renderscript.Toolkit;
 import com.patrykmichalik.opto.core.PreferenceExtensionsKt;
 import com.android.systemui.plugins.shared.LauncherOverlayManager.LauncherOverlayCallbacks;
 
@@ -138,10 +143,12 @@ import java.util.function.Consumer;
 import java.util.function.Predicate;
 import java.util.stream.Collectors;
 
+import app.lawnchair.preferences.PreferenceManager;
 import app.lawnchair.preferences2.PreferenceManager2;
 import app.lawnchair.smartspace.SmartspaceAppWidgetProvider;
 import app.lawnchair.smartspace.model.LawnchairSmartspace;
 import app.lawnchair.smartspace.model.SmartspaceMode;
+import app.lawnchair.util.LawnchairUtilsKt;
 
 /**
  * The workspace is a wide area with a wallpaper and a finite number of pages.
@@ -301,6 +308,7 @@ public class Workspace<T extends View & PageIndicator> extends PagedView<T>
     private final StatsLogManager mStatsLogManager;
 
     PreferenceManager2 mPreferenceManager2;
+    PreferenceManager mPreferenceManger;
 
     /**
      * Used to inflate the Workspace from XML.
@@ -329,6 +337,7 @@ public class Workspace<T extends View & PageIndicator> extends PagedView<T>
         mAllAppsIconSize = mLauncher.getDeviceProfile().allAppsIconSizePx;
         mWallpaperManager = WallpaperManager.getInstance(context);
         mPreferenceManager2 = PreferenceManager2.getInstance(context);
+        mPreferenceManger = PreferenceManager.getInstance(context);
 
         mWallpaperOffset = new WallpaperOffsetInterpolator(this);
 
@@ -339,6 +348,18 @@ public class Workspace<T extends View & PageIndicator> extends PagedView<T>
         setMotionEventSplittingEnabled(true);
         setOnTouchListener(new WorkspaceTouchListener(mLauncher, this));
         mStatsLogManager = StatsLogManager.newInstance(context);
+
+        if (mPreferenceManger.getEnableWallpaperBlur().get() && mWallpaperManager.getDrawable() != null) {
+            var blurWallpaper = mPreferenceManger.getWallpaperBlur().get();
+            var blurThreshold = mPreferenceManger.getWallpaperBlurFactorThreshold().get();
+            var wallpaperBitmap = mWallpaperManager.getDrawable();
+            try {
+                mWallpaperManager.setBitmap(LawnchairUtilsKt.blurBitmap(toBitmap(wallpaperBitmap),blurWallpaper, blurThreshold), null, true, WallpaperManager.FLAG_SYSTEM);
+                mWallpaperManager.forgetLoadedWallpaper();
+            } catch (Exception ex) {
+                Log.e(TAG, "error failed bluring wallpaper");
+            }
+        }
     }
 
     @Override