commit fc3d84f832fe5c6f6524866f4faf49bac3fd8c44
author Palak Agarwal <agpalak@google.com> Mon Jun 30 15:28:28 2025
committer WebRTC LUCI CQ <webrtc-scoped@luci-project-accounts.iam.gserviceaccount.com> Tue Jul 01 08:42:39 2025
tree c7e0ec7e135f519fb5f149aeafe2d254a7ab82a9
parent 6dc30b361cd87b93f2477ef205167673bd3da933

Update frame damage_region when previous_frame is false

Bug: chromium:409473386
Change-Id: I4b0a01711ed710b9187837af3610163665a62ba5
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/398560
Commit-Queue: Palak Agarwal <agpalak@google.com>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#45053}

modules/desktop_capture/win/wgc_capture_session.cc

diff --git a/modules/desktop_capture/win/wgc_capture_session.cc b/modules/desktop_capture/win/wgc_capture_session.cc
index f024349..dc744d4 100644
--- a/modules/desktop_capture/win/wgc_capture_session.cc
+++ b/modules/desktop_capture/win/wgc_capture_session.cc
@@ -583,6 +583,15 @@
         // Mark resized frames as damaged.
         damage_region_.SetRect(DesktopRect::MakeSize(current_frame->size()));
       }
+    } else{
+      // Mark a `damage_region_` even if there is no previous frame. This
+      // condition does not create any increased overhead but is useful while
+      // using FullScreenWindowDetector, where it would create a new
+      // WgcCaptureSession(with no previous frame) for the slide show window but
+      // the DesktopCaptureDevice instance might have already received frames
+      // from the editor window's WgcCaptureSession which would have activated
+      // the zero-hertz mode.
+      damage_region_.SetRect(DesktopRect::MakeSize(current_frame->size()));
     }
   }