SF: Move doDebugFlashRegions to CompositionEngine

Test: atest libsurfaceflinger_unittest libcompositionengine_test
Bug: 121291683
Change-Id: I0ea71e6c86231d6fedca7309889001cea3ecf47b
diff --git a/services/surfaceflinger/CompositionEngine/src/Output.cpp b/services/surfaceflinger/CompositionEngine/src/Output.cpp
index 2483c06..10534f4 100644
--- a/services/surfaceflinger/CompositionEngine/src/Output.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/Output.cpp
@@ -14,8 +14,11 @@
  * limitations under the License.
  */
 
+#include <thread>
+
 #include <android-base/stringprintf.h>
 #include <compositionengine/CompositionEngine.h>
+#include <compositionengine/CompositionRefreshArgs.h>
 #include <compositionengine/DisplayColorProfile.h>
 #include <compositionengine/Layer.h>
 #include <compositionengine/LayerFE.h>
@@ -299,6 +302,30 @@
     mRenderSurface->prepareFrame(mState.usesClientComposition, mState.usesDeviceComposition);
 }
 
+void Output::devOptRepaintFlash(const compositionengine::CompositionRefreshArgs& refreshArgs) {
+    if (CC_LIKELY(!refreshArgs.devOptFlashDirtyRegionsDelay)) {
+        return;
+    }
+
+    if (mState.isEnabled) {
+        // transform the dirty region into this screen's coordinate space
+        const Region dirtyRegion = getDirtyRegion(refreshArgs.repaintEverything);
+        if (!dirtyRegion.isEmpty()) {
+            base::unique_fd readyFence;
+            // redraw the whole screen
+            composeSurfaces(dirtyRegion, &readyFence);
+
+            mRenderSurface->queueBuffer(std::move(readyFence));
+        }
+    }
+
+    postFramebuffer();
+
+    std::this_thread::sleep_for(*refreshArgs.devOptFlashDirtyRegionsDelay);
+
+    prepareFrame();
+}
+
 bool Output::composeSurfaces(const Region& debugRegion, base::unique_fd* readyFence) {
     ATRACE_CALL();
     ALOGV(__FUNCTION__);