SF: Change screenshot code to use snapshots

This prepares us for frontend changes which do not rely on the Layer
object. Instead we change the traversal function to return
a z-ordered list of snapshots. This cl also changes some of the logic
to check the snapshot instead of the layer drawing state.

Bug: 238781169
Test: presubmit
Test: manually test hdr listeners

Change-Id: If508f9380fdef0414bbf448ece767be3e0bba9cf

1 files changed, 2 insertions, 1 deletions

diff --git a/services/surfaceflinger/RegionSamplingThread.cpp b/services/surfaceflinger/RegionSamplingThread.cpp
index 6e64e0a13b..839500f8a0 100644
--- a/services/surfaceflinger/RegionSamplingThread.cpp
+++ b/services/surfaceflinger/RegionSamplingThread.cpp
@@ -344,12 +344,13 @@ void RegionSamplingThread::captureSample() {
                                                      renderengine::impl::ExternalTexture::Usage::
                                                              WRITEABLE);
     }
+    auto getLayerSnapshots = RenderArea::fromTraverseLayersLambda(traverseLayers);
 
     constexpr bool kRegionSampling = true;
     constexpr bool kGrayscale = false;
 
     if (const auto fenceResult =
-                mFlinger.captureScreenCommon(std::move(renderAreaFuture), traverseLayers, buffer,
+                mFlinger.captureScreenCommon(std::move(renderAreaFuture), getLayerSnapshots, buffer,
                                              kRegionSampling, kGrayscale, nullptr)
                         .get();
         fenceResult.ok()) {