add an experimental feature for high image compression

src/org/thoughtcrime/securesms/preferences/AdvancedPreferenceFragment.java

@@ -91,6 +91,9 @@ public class AdvancedPreferenceFragment extends ListSummaryPreferenceFragment
       return true;
     });
 
+    this.findPreference("pref_compression")
+      .setOnPreferenceChangeListener(new ListSummaryListener());
+
     Preference backup = this.findPreference("pref_backup");
     backup.setOnPreferenceClickListener(new BackupListener());
 
@@ -143,6 +146,7 @@ public class AdvancedPreferenceFragment extends ListSummaryPreferenceFragment
     mvboxWatchCheckbox.setChecked(0!=dcContext.getConfigInt("mvbox_watch"));
     mvboxMoveCheckbox.setChecked(0!=dcContext.getConfigInt("mvbox_move"));
     updateListSummary(showEmails, Integer.toString(dcContext.getConfigInt("show_emails")));
+    initializeListSummary((ListPreferenceWithSummary) findPreference("pref_compression"));
   }
 
   @Override

src/org/thoughtcrime/securesms/util/BitmapUtil.java

@@ -379,7 +379,13 @@ public class BitmapUtil {
 
   public static void recodeImageMsg(Context context, DcMsg msg)
   {
-    final int desiredWH = 1280;
+    int desiredWH = 1280;
+    int desiredJpegQuality = 85;
+
+    if (Prefs.isHardCompressionEnabled(context)) {
+      desiredWH = 640;
+      desiredJpegQuality = 75;
+    }
 
     try {
       String inPath = msg.getFile();
@@ -432,7 +438,7 @@ public class BitmapUtil {
 
       String outPath = DcHelper.getContext(context).getBlobdirFile(inPath);
       FileOutputStream outStream = new FileOutputStream(outPath);
-      if(!outBitmap.compress(Bitmap.CompressFormat.JPEG, 85, outStream)) {
+      if(!outBitmap.compress(Bitmap.CompressFormat.JPEG, desiredJpegQuality, outStream)) {
         return;
       }
 

src/org/thoughtcrime/securesms/util/Prefs.java

@@ -229,6 +229,15 @@ public class Prefs {
     return getBooleanPreference(context, NOTIFICATION_PREF, true);
   }
 
+  public static boolean isHardCompressionEnabled(Context context) {
+    try {
+      return getStringPreference(context, "pref_compression", "0").equals("1");
+    }
+    catch(Exception e) {
+      return false;
+    }
+  }
+
   // ringtone
 
   public static @NonNull Uri getNotificationRingtone(Context context) {