#1135 lower the lossless threshold when no video is present on screen…

…, even if we refresh the whole page

git-svn-id: https://xpra.org/svn/Xpra/trunk@12029 3bb7dfac-3a0b-4e04-842a-767bc560f471

src/xpra/server/window/window_source.py

@@ -662,8 +662,8 @@ def update_encoding_selection(self, encoding=None, exclude=[]):
 
     def update_encoding_options(self, force_reload=False):
         self._want_alpha = self.is_tray or (self.has_alpha and self.supports_transparency)
-        self._lossless_threshold_base = min(95, 75+self._current_speed/5)
-        self._lossless_threshold_pixel_boost = 20
+        self._lossless_threshold_base = min(90, 60+self._current_speed//5)
+        self._lossless_threshold_pixel_boost = max(5, 20-self._current_speed//5)
         #calculate the threshold for using rgb
         #if speed is high, assume we have bandwidth to spare
         smult = max(0.25, (self._current_speed-50)/5.0)

src/xpra/server/window/window_video_source.py

@@ -646,8 +646,8 @@ def update_encoding_options(self, force_reload=False):
             if self.video_subregion.rectangle:
                 #when we have a video region, lower the lossless threshold
                 #especially for small regions
-                self._lossless_threshold_base = min(80, 10+self._current_speed/5)
-                self._lossless_threshold_pixel_boost = 90
+                self._lossless_threshold_base = min(80, 10+self._current_speed//5)
+                self._lossless_threshold_pixel_boost = 90-self._current_speed//5
 
         if force_reload:
             self.cleanup_codecs()