Merge pull request #14270 from nextcloud/bugfix/handle-png-software-r…

…endering

BugFix - ThumbnailCacheManager Software rendering doesn't support hardware bitmaps

app/src/main/java/com/owncloud/android/datamodel/ThumbnailsCacheManager.java

@@ -70,6 +70,7 @@
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;
+import androidx.core.content.ContextCompat;
 import androidx.core.content.res.ResourcesCompat;
 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 
@@ -1260,9 +1261,11 @@ public AsyncMediaThumbnailDrawable(Resources res, Bitmap bitmap) {
     }
 
     /**
-     * adapted from https://stackoverflow.com/a/8113368
+     * adapted from <a href="https://stackoverflow.com/a/8113368">...</a>
      */
     private static Bitmap handlePNG(Bitmap source, int newWidth, int newHeight) {
+        Bitmap softwareBitmap = source.copy(Bitmap.Config.ARGB_8888, false);
+
         int sourceWidth = source.getWidth();
         int sourceHeight = source.getHeight();
 
@@ -1281,8 +1284,9 @@ private static Bitmap handlePNG(Bitmap source, int newWidth, int newHeight) {
         Bitmap dest = Bitmap.createBitmap(newWidth, newHeight, Bitmap.Config.ARGB_8888);
 
         Canvas canvas = new Canvas(dest);
-        canvas.drawColor(MainApp.getAppContext().getResources().getColor(R.color.background_color_png));
-        canvas.drawBitmap(source, null, targetRect, null);
+        int color = ContextCompat.getColor(MainApp.getAppContext(),R.color.background_color_png);
+        canvas.drawColor(color);
+        canvas.drawBitmap(softwareBitmap, null, targetRect, null);
 
         return dest;
     }