Tile Compression

cc/base/switches.cc

Index: cc/base/switches.cc
diff --git a/cc/base/switches.cc b/cc/base/switches.cc
index d34821e0fac6bf348af5fd66c7d282d33b484a1e..8505d8c21dff8d633b8cdc4907a184c16f973b2f 100644
--- a/cc/base/switches.cc
+++ b/cc/base/switches.cc
@@ -93,6 +93,30 @@ const char kUIShowSurfaceDamageRects[] = "ui-show-surface-damage-rects";
 const char kShowScreenSpaceRects[] = "show-screenspace-rects";
 const char kUIShowScreenSpaceRects[] = "ui-show-screenspace-rects";
 
+// Don't allow compressed textures for tiles.
+const char kDisableTileCompression[] = "disable-tile-compression";
+
+// Compress textures used for tiles if the gpu supports it.
+const char kEnableTileCompression[] = "enable-tile-compression";
+
+// Only compress non-urgent tiles, where the urgent level can be any of the
+// different bins found in ManagedTileBin. Defaults to -1 which means all bins.
+const char kTileCompressionThreshold[] = "tile-compression-threshold";
+
+// Set the preferred tile compression method.
+const char kTileCompressionMethod[] = "tile-compression-method";
+
+bool IsTileCompressionEnabled() {
+  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+
+  if (command_line.HasSwitch(switches::kDisableTileCompression))
+    return false;
+  else if (command_line.HasSwitch(switches::kEnableTileCompression))
+    return true;
+
+  return false;
+}
+
 // Show rects in the HUD around the screen-space transformed bounds of every
 // layer's replica, when they have one.
 const char kShowReplicaScreenSpaceRects[] = "show-replica-screenspace-rects";