monochrome wp

app/src/main/java/ru/vtosters/lite/ui/wallpapers/WallpaperMenuFragment.java

@@ -8,6 +8,8 @@ import static ru.vtosters.lite.ui.wallpapers.WallpapersHooks.requestUpdateWallpa
 import static ru.vtosters.lite.utils.CacheUtils.deleteCache;
 import static ru.vtosters.lite.utils.Globals.edit;
 import static ru.vtosters.lite.utils.Globals.getIdentifier;
+import static ru.vtosters.lite.utils.Globals.getPreferences;
+import static ru.vtosters.lite.utils.Preferences.DoNotUseOldIcons;
 
 import android.content.Context;
 import android.content.Intent;
@@ -27,6 +29,7 @@ import java.io.InputStream;
 import java.io.OutputStream;
 
 import ru.vtosters.lite.ui.PreferencesUtil;
+import ru.vtosters.lite.utils.Globals;
 
 public class WallpaperMenuFragment extends MaterialPreferenceToolbarFragment{
 
@@ -93,6 +96,14 @@ public class WallpaperMenuFragment extends MaterialPreferenceToolbarFragment{
                 "disabled", "low", "med", "high"
         });
 
+        PreferencesUtil.addMaterialSwitchPreference(this, "msg_monochrome", "Черно-белый фон", "", null, false, (preference, o) -> {
+            boolean value = (boolean) o;
+            edit().putBoolean("msg_monochrome", value).commit();
+            requestUpdateWallpaper();
+            mWPPreviewPref.redraw();
+            return true;
+        });
+
         ListPreference blur = (ListPreference) findPreference("msg_blur_radius");
         ListPreference dim = (ListPreference) findPreference("msg_dim");
         ListPreference mosaic = (ListPreference) findPreference("msg_mosaic");

app/src/main/java/ru/vtosters/lite/ui/wallpapers/WallpapersHooks.java

@@ -61,6 +61,10 @@ public class WallpapersHooks{
                 mWallpaper = getMosaic(mWallpaper);
             }
 
+            if (getPreferences().getBoolean("msg_monochrome", false)) {
+                mWallpaper = getMonochrome(mWallpaper);
+            }
+
             mUpdateWallpaperRequested = false;
         }
 
@@ -175,6 +179,27 @@ public class WallpapersHooks{
         return new BitmapDrawable(getResources(), instance);
     }
 
+    public static Drawable getMonochrome(Drawable orig){
+        if (orig == null) return null;
+        if (!(orig instanceof BitmapDrawable)) return orig;
+        Bitmap instance = ((BitmapDrawable) orig).getBitmap().copy(Bitmap.Config.ARGB_8888, true);
+
+        Bitmap bwBitmap = Bitmap.createBitmap( instance.getWidth(), instance.getHeight(), Bitmap.Config.RGB_565 );
+        float[] hsv = new float[ 3 ];
+        for( int col = 0; col < instance.getWidth(); col++ ) {
+            for( int row = 0; row < instance.getHeight(); row++ ) {
+                Color.colorToHSV( instance.getPixel( col, row ), hsv );
+                if( hsv[ 2 ] > 0.5f ) {
+                    bwBitmap.setPixel( col, row, 0xffffffff );
+                } else {
+                    bwBitmap.setPixel( col, row, 0xff000000 );
+                }
+            }
+        }
+
+        return new BitmapDrawable(getResources(), bwBitmap);
+    }
+
     private static Bitmap darken(Bitmap bm){
         Canvas canvas = new Canvas(bm);
         Paint p = new Paint(Color.RED);