SF: Support display mirroring with new frontend
Bug: 238781169
Test: presubmit
Change-Id: I569822bd1dd70e2b0b660042329abb27f263dc66
diff --git a/services/surfaceflinger/FrontEnd/LayerLifecycleManager.cpp b/services/surfaceflinger/FrontEnd/LayerLifecycleManager.cpp
index 5514c06..547a852 100644
--- a/services/surfaceflinger/FrontEnd/LayerLifecycleManager.cpp
+++ b/services/surfaceflinger/FrontEnd/LayerLifecycleManager.cpp
@@ -44,9 +44,28 @@
layer.parentId = linkLayer(layer.parentId, layer.id);
layer.relativeParentId = linkLayer(layer.relativeParentId, layer.id);
- layer.mirrorId = linkLayer(layer.mirrorId, layer.id);
+ if (layer.layerStackToMirror != ui::INVALID_LAYER_STACK) {
+ // if this layer is mirroring a display, then walk though all the existing root layers
+ // for the layer stack and add them as children to be mirrored.
+ mDisplayMirroringLayers.emplace_back(layer.id);
+ for (auto& rootLayer : mLayers) {
+ if (rootLayer->isRoot() && rootLayer->layerStack == layer.layerStackToMirror) {
+ layer.mirrorIds.emplace_back(rootLayer->id);
+ linkLayer(rootLayer->id, layer.id);
+ }
+ }
+ } else {
+ // Check if we are mirroring a single layer, and if so add it to the list of children
+ // to be mirrored.
+ layer.layerIdToMirror = linkLayer(layer.layerIdToMirror, layer.id);
+ if (layer.layerIdToMirror != UNASSIGNED_LAYER_ID) {
+ layer.mirrorIds.emplace_back(layer.layerIdToMirror);
+ }
+ }
layer.touchCropId = linkLayer(layer.touchCropId, layer.id);
-
+ if (layer.isRoot()) {
+ updateDisplayMirrorLayers(layer);
+ }
mLayers.emplace_back(std::move(newLayer));
}
}
@@ -85,7 +104,14 @@
layer.parentId = unlinkLayer(layer.parentId, layer.id);
layer.relativeParentId = unlinkLayer(layer.relativeParentId, layer.id);
- layer.mirrorId = unlinkLayer(layer.mirrorId, layer.id);
+ if (layer.layerStackToMirror != ui::INVALID_LAYER_STACK) {
+ layer.mirrorIds = unlinkLayers(layer.mirrorIds, layer.id);
+ swapErase(mDisplayMirroringLayers, layer.id);
+ } else {
+ layer.layerIdToMirror = unlinkLayer(layer.layerIdToMirror, layer.id);
+ layer.mirrorIds.clear();
+ }
+
layer.touchCropId = unlinkLayer(layer.touchCropId, layer.id);
auto& references = it->second.references;
@@ -106,8 +132,8 @@
if (linkedLayer->relativeParentId == layer.id) {
linkedLayer->relativeParentId = UNASSIGNED_LAYER_ID;
}
- if (linkedLayer->mirrorId == layer.id) {
- linkedLayer->mirrorId = UNASSIGNED_LAYER_ID;
+ if (swapErase(linkedLayer->mirrorIds, layer.id)) {
+ linkedLayer->changes |= RequestedLayerState::Changes::Mirror;
}
if (linkedLayer->touchCropId == layer.id) {
linkedLayer->touchCropId = UNASSIGNED_LAYER_ID;
@@ -200,6 +226,12 @@
if (oldParentId != layer->parentId) {
unlinkLayer(oldParentId, layer->id);
layer->parentId = linkLayer(layer->parentId, layer->id);
+ if (oldParentId == UNASSIGNED_LAYER_ID) {
+ updateDisplayMirrorLayers(*layer);
+ }
+ }
+ if (layer->what & layer_state_t::eLayerStackChanged && layer->isRoot()) {
+ updateDisplayMirrorLayers(*layer);
}
if (oldRelativeParentId != layer->relativeParentId) {
unlinkLayer(oldRelativeParentId, layer->id);
@@ -308,6 +340,14 @@
return UNASSIGNED_LAYER_ID;
}
+std::vector<uint32_t> LayerLifecycleManager::unlinkLayers(const std::vector<uint32_t>& layerIds,
+ uint32_t linkedLayer) {
+ for (uint32_t layerId : layerIds) {
+ unlinkLayer(layerId, linkedLayer);
+ }
+ return {};
+}
+
std::string LayerLifecycleManager::References::getDebugString() const {
std::string debugInfo = owner.name + "[" + std::to_string(owner.id) + "] refs:";
std::for_each(references.begin(), references.end(),
@@ -329,4 +369,30 @@
mGlobalChanges |= RequestedLayerState::Changes::Hierarchy;
}
+// Some layers mirror the entire display stack. Since we don't have a single root layer per display
+// we have to track all these layers and update what they mirror when the list of root layers
+// on a display changes. This function walks through the list of display mirroring layers
+// and updates its list of layers that its mirroring. This function should be called when a new
+// root layer is added, removed or moved to another display.
+void LayerLifecycleManager::updateDisplayMirrorLayers(RequestedLayerState& rootLayer) {
+ for (uint32_t mirrorLayerId : mDisplayMirroringLayers) {
+ RequestedLayerState* mirrorLayer = getLayerFromId(mirrorLayerId);
+ bool canBeMirrored =
+ rootLayer.isRoot() && rootLayer.layerStack == mirrorLayer->layerStackToMirror;
+ bool currentlyMirrored =
+ std::find(mirrorLayer->mirrorIds.begin(), mirrorLayer->mirrorIds.end(),
+ rootLayer.id) != mirrorLayer->mirrorIds.end();
+
+ if (canBeMirrored && !currentlyMirrored) {
+ mirrorLayer->mirrorIds.emplace_back(rootLayer.id);
+ linkLayer(rootLayer.id, mirrorLayer->id);
+ mirrorLayer->changes |= RequestedLayerState::Changes::Mirror;
+ } else if (!canBeMirrored && currentlyMirrored) {
+ swapErase(mirrorLayer->mirrorIds, rootLayer.id);
+ unlinkLayer(rootLayer.id, mirrorLayer->id);
+ mirrorLayer->changes |= RequestedLayerState::Changes::Mirror;
+ }
+ }
+}
+
} // namespace android::surfaceflinger::frontend