Compositor reflector, which copies texture onto another compositor.

- added GL utility functions to create and copy texture for mirroring
- made sure we don't create two compositor for the same display.
- update the mirroring compositor size when the mirror window size
  changed.
- fix a bug that was using int for display ID. changed the
  initial value for faked display id so that we can catch
  such error early in test.


BUG=239776
TEST=added new tests, plus manually on daisy (mirroring now works on daisy)

Review URL: https://chromiumcodereview.appspot.com/16232013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@205044 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 26 insertions, 2 deletions

diff --git a/chromeos/display/output_configurator.cc b/chromeos/display/output_configurator.cc
index 8214d0c..19b28f5 100644
--- a/chromeos/display/output_configurator.cc
+++ b/chromeos/display/output_configurator.cc
@@ -254,8 +254,14 @@ bool OutputConfigurator::SetDisplayMode(OutputState new_state) {
     return false;
 
   VLOG(1) << "SetDisplayMode: state=" << OutputStateToString(new_state);
-  if (output_state_ == new_state)
+  if (output_state_ == new_state) {
+    // Cancel software mirroring if the state is moving from
+    // STATE_DUAL_EXTENDED to STATE_DUAL_EXTENDED.
+    if (mirroring_controller_ && new_state == STATE_DUAL_EXTENDED)
+      mirroring_controller_->SetSoftwareMirroring(false);
+    NotifyOnDisplayChanged();
     return true;
+  }
 
   delegate_->GrabServer();
   std::vector<OutputSnapshot> outputs = delegate_->GetOutputs();
diff --git a/chromeos/display/output_configurator_unittest.cc b/chromeos/display/output_configurator_unittest.cc
index 606180c..6deae54 100644
--- a/chromeos/display/output_configurator_unittest.cc
+++ b/chromeos/display/output_configurator_unittest.cc
@@ -406,6 +406,18 @@ TEST_F(OutputConfiguratorTest, ConnectSecondOutput) {
   EXPECT_EQ(STATE_DUAL_EXTENDED, configurator_.output_state());
   EXPECT_TRUE(mirroring_controller_.software_mirroring_enabled());
 
+  // Setting STATE_DUAL_MIRROR should try to reconfigure
+  EXPECT_TRUE(configurator_.SetDisplayMode(STATE_DUAL_EXTENDED));
+  EXPECT_EQ(JoinActions(NULL), delegate_->GetActionsAndClear());
+  EXPECT_FALSE(mirroring_controller_.software_mirroring_enabled());
+
+  // Set back to software mirror mode.
+  EXPECT_TRUE(configurator_.SetDisplayMode(STATE_DUAL_MIRROR));
+  EXPECT_EQ(JoinActions(kGrab, kUngrab, NULL),
+            delegate_->GetActionsAndClear());
+  EXPECT_EQ(STATE_DUAL_EXTENDED, configurator_.output_state());
+  EXPECT_TRUE(mirroring_controller_.software_mirroring_enabled());
+
   // Disconnect the second output.
   UpdateOutputs(1);
   EXPECT_TRUE(test_api_.SendOutputChangeEvents(false));
diff --git a/chromeos/display/real_output_configurator_delegate.cc b/chromeos/display/real_output_configurator_delegate.cc
index 30a8494..a44a41b 100644
--- a/chromeos/display/real_output_configurator_delegate.cc
+++ b/chromeos/display/real_output_configurator_delegate.cc
@@ -123,6 +123,13 @@ RealOutputConfiguratorDelegate::GetOutputs() {
       to_populate.output = this_id;
       to_populate.has_display_id =
           GetDisplayId(this_id, i, &to_populate.display_id);
+      to_populate.is_internal = IsInternalOutput(output_info);
+      // Use the index as a valid display id even if the internal
+      // display doesn't have valid EDID because the index
+      // will never change.
+      if (!to_populate.has_display_id && to_populate.is_internal)
+        to_populate.has_display_id = true;
+
       (outputs.empty() ? one_info : two_info) = output_info;
 
       // Now, look up the current CRTC and any related info.
@@ -145,7 +152,6 @@ RealOutputConfiguratorDelegate::GetOutputs() {
       }
 
       to_populate.native_mode = GetOutputNativeMode(output_info);
-      to_populate.is_internal = IsInternalOutput(output_info);
       to_populate.is_aspect_preserving_scaling =
           IsOutputAspectPreservingScaling(this_id);
       to_populate.touch_device_id = None;