Add "panel_fitting" GPU feature type and use it for mirror mode.

chromeos/display/output_configurator.h

Index: chromeos/display/output_configurator.h
diff --git a/chromeos/display/output_configurator.h b/chromeos/display/output_configurator.h
index ca03bfd1bf4462d01772bab949adc06fb6aef7ad..dd14e74d0fdfd7324f3f8f93f6c926c065b22e7a 100644
--- a/chromeos/display/output_configurator.h
+++ b/chromeos/display/output_configurator.h
@@ -22,6 +22,8 @@ typedef XID RRMode;
 
 struct _XRRScreenResources;
 typedef _XRRScreenResources XRRScreenResources;
+struct _XRROutputInfo;
+typedef _XRROutputInfo XRROutputInfo;
 
 namespace chromeos {
 
@@ -57,6 +59,10 @@ class CHROMEOS_EXPORT OutputConfigurator : public MessageLoop::Dispatcher {
 
   OutputState output_state() const { return output_state_; }
 
+  // Initialization, must be called right after constructor.
+  // |is_panel_fitting_supported| indicates hardware panel fitting support.
+  void Init(bool is_panel_fitting_supported);
+
   // Called when the user hits ctrl-F4 to request a display mode change.
   // This method should only return false if it was called in a single-head or
   // headless mode.
@@ -85,6 +91,9 @@ class CHROMEOS_EXPORT OutputConfigurator : public MessageLoop::Dispatcher {
   // Tells if the output specified by |name| is for internal display.
   static bool IsInternalOutputName(const std::string& name);
 
+  // Returns output's native mode, None if not found.
+  static RRMode GetOutputNativeMode(const XRROutputInfo* output_info);
+
  private:
   // Fires OnDisplayModeChanged() event to the observers.
   void NotifyOnDisplayChanged();
@@ -96,6 +105,10 @@ class CHROMEOS_EXPORT OutputConfigurator : public MessageLoop::Dispatcher {
   // configuration to immediately fail without changing the state.
   bool is_running_on_chrome_os_;
 
+  // This is set externally in Init,
+  // and is used to enable modes which rely on panel fitting.
+  bool is_panel_fitting_supported_;

[cwolfe, 2012/09/18 13:27:47]

Weak preference for something like use_panel_fitting_ (since it can be
supported, but still disabled)

[ynovikov, 2012/09/21 18:48:27]

Done.

+
   // The number of outputs that are connected.
   int connected_output_count_;