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-rw-r--r--services/surfaceflinger/Layer.cpp75
-rw-r--r--services/surfaceflinger/Layer.h21
-rw-r--r--services/surfaceflinger/tests/Transaction_test.cpp52
3 files changed, 137 insertions, 11 deletions
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 3a71188b37..66ad2f60a6 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -23,6 +23,7 @@
#include <stdint.h>
#include <stdlib.h>
#include <sys/types.h>
+#include <algorithm>
#include <cutils/compiler.h>
#include <cutils/native_handle.h>
@@ -1777,27 +1778,79 @@ void Layer::traverseInReverseZOrder(LayerVector::StateSet stateSet,
}
}
-/**
- * Traverse only children in z order, ignoring relative layers.
- */
-void Layer::traverseChildrenInZOrder(LayerVector::StateSet stateSet,
- const LayerVector::Visitor& visitor) {
+LayerVector Layer::makeChildrenTraversalList(LayerVector::StateSet stateSet,
+ const std::vector<Layer*>& layersInTree) {
+ LOG_ALWAYS_FATAL_IF(stateSet == LayerVector::StateSet::Invalid,
+ "makeTraversalList received invalid stateSet");
const bool useDrawing = stateSet == LayerVector::StateSet::Drawing;
const LayerVector& children = useDrawing ? mDrawingChildren : mCurrentChildren;
+ const State& state = useDrawing ? mDrawingState : mCurrentState;
+
+ LayerVector traverse;
+ for (const wp<Layer>& weakRelative : state.zOrderRelatives) {
+ sp<Layer> strongRelative = weakRelative.promote();
+ // Only add relative layers that are also descendents of the top most parent of the tree.
+ // If a relative layer is not a descendent, then it should be ignored.
+ if (std::binary_search(layersInTree.begin(), layersInTree.end(), strongRelative.get())) {
+ traverse.add(strongRelative);
+ }
+ }
+
+ for (const sp<Layer>& child : children) {
+ const State& childState = useDrawing ? child->mDrawingState : child->mCurrentState;
+ // If a layer has a relativeOf layer, only ignore if the layer it's relative to is a
+ // descendent of the top most parent of the tree. If it's not a descendent, then just add
+ // the child here since it won't be added later as a relative.
+ if (std::binary_search(layersInTree.begin(), layersInTree.end(),
+ childState.zOrderRelativeOf.promote().get())) {
+ continue;
+ }
+ traverse.add(child);
+ }
+
+ return traverse;
+}
+
+void Layer::traverseChildrenInZOrderInner(const std::vector<Layer*>& layersInTree,
+ LayerVector::StateSet stateSet,
+ const LayerVector::Visitor& visitor) {
+ const LayerVector list = makeChildrenTraversalList(stateSet, layersInTree);
size_t i = 0;
- for (; i < children.size(); i++) {
- const auto& relative = children[i];
+ for (; i < list.size(); i++) {
+ const auto& relative = list[i];
if (relative->getZ() >= 0) {
break;
}
- relative->traverseChildrenInZOrder(stateSet, visitor);
+ relative->traverseChildrenInZOrderInner(layersInTree, stateSet, visitor);
}
+
visitor(this);
- for (; i < children.size(); i++) {
- const auto& relative = children[i];
- relative->traverseChildrenInZOrder(stateSet, visitor);
+ for (; i < list.size(); i++) {
+ const auto& relative = list[i];
+ relative->traverseChildrenInZOrderInner(layersInTree, stateSet, visitor);
+ }
+}
+
+std::vector<Layer*> Layer::getLayersInTree(LayerVector::StateSet stateSet) {
+ const bool useDrawing = stateSet == LayerVector::StateSet::Drawing;
+ const LayerVector& children = useDrawing ? mDrawingChildren : mCurrentChildren;
+
+ std::vector<Layer*> layersInTree = {this};
+ for (size_t i = 0; i < children.size(); i++) {
+ const auto& child = children[i];
+ std::vector<Layer*> childLayers = child->getLayersInTree(stateSet);
+ layersInTree.insert(layersInTree.end(), childLayers.cbegin(), childLayers.cend());
}
+
+ return layersInTree;
+}
+
+void Layer::traverseChildrenInZOrder(LayerVector::StateSet stateSet,
+ const LayerVector::Visitor& visitor) {
+ std::vector<Layer*> layersInTree = getLayersInTree(stateSet);
+ std::sort(layersInTree.begin(), layersInTree.end());
+ traverseChildrenInZOrderInner(layersInTree, stateSet, visitor);
}
Transform Layer::getTransform() const {
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index d382a1a173..be3967b2cb 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -51,6 +51,7 @@
#include "RenderEngine/Texture.h"
#include <math/vec4.h>
+#include <vector>
using namespace android::surfaceflinger;
@@ -564,6 +565,10 @@ public:
const LayerVector::Visitor& visitor);
void traverseInZOrder(LayerVector::StateSet stateSet, const LayerVector::Visitor& visitor);
+ /**
+ * Traverse only children in z order, ignoring relative layers that are not children of the
+ * parent.
+ */
void traverseChildrenInZOrder(LayerVector::StateSet stateSet,
const LayerVector::Visitor& visitor);
@@ -778,6 +783,22 @@ protected:
wp<Layer> mDrawingParent;
mutable LayerBE mBE;
+
+private:
+ /**
+ * Returns an unsorted vector of all layers that are part of this tree.
+ * That includes the current layer and all its descendants.
+ */
+ std::vector<Layer*> getLayersInTree(LayerVector::StateSet stateSet);
+ /**
+ * Traverses layers that are part of this tree in the correct z order.
+ * layersInTree must be sorted before calling this method.
+ */
+ void traverseChildrenInZOrderInner(const std::vector<Layer*>& layersInTree,
+ LayerVector::StateSet stateSet,
+ const LayerVector::Visitor& visitor);
+ LayerVector makeChildrenTraversalList(LayerVector::StateSet stateSet,
+ const std::vector<Layer*>& layersInTree);
};
// ---------------------------------------------------------------------------
diff --git a/services/surfaceflinger/tests/Transaction_test.cpp b/services/surfaceflinger/tests/Transaction_test.cpp
index a0f12f1438..5108279043 100644
--- a/services/surfaceflinger/tests/Transaction_test.cpp
+++ b/services/surfaceflinger/tests/Transaction_test.cpp
@@ -2376,6 +2376,58 @@ TEST_F(ScreenCaptureTest, CaptureTransparent) {
mCapture->expectColor(Rect(0, 10, 9, 19), {0, 0, 0, 0});
}
+TEST_F(ScreenCaptureTest, DontCaptureRelativeOutsideTree) {
+ auto fgHandle = mFGSurfaceControl->getHandle();
+
+ sp<SurfaceControl> child =
+ mComposerClient->createSurface(String8("Child surface"), 10, 10, PIXEL_FORMAT_RGBA_8888,
+ 0, mFGSurfaceControl.get());
+ sp<SurfaceControl> relative = mComposerClient->createSurface(String8("Relative surface"), 10,
+ 10, PIXEL_FORMAT_RGBA_8888, 0);
+ fillSurfaceRGBA8(child, 200, 200, 200);
+ fillSurfaceRGBA8(relative, 100, 100, 100);
+
+ SurfaceComposerClient::Transaction()
+ .show(child)
+ // Set relative layer above fg layer so should be shown above when computing all layers.
+ .setRelativeLayer(relative, fgHandle, 1)
+ .show(relative)
+ .apply(true);
+
+ // Captures mFGSurfaceControl layer and its child. Relative layer shouldn't be captured.
+ ScreenCapture::captureLayers(&mCapture, fgHandle);
+ mCapture->expectFGColor(10, 10);
+ mCapture->expectChildColor(0, 0);
+}
+
+TEST_F(ScreenCaptureTest, CaptureRelativeInTree) {
+ auto fgHandle = mFGSurfaceControl->getHandle();
+
+ sp<SurfaceControl> child =
+ mComposerClient->createSurface(String8("Child surface"), 10, 10, PIXEL_FORMAT_RGBA_8888,
+ 0, mFGSurfaceControl.get());
+ sp<SurfaceControl> relative =
+ mComposerClient->createSurface(String8("Relative surface"), 10, 10,
+ PIXEL_FORMAT_RGBA_8888, 0, mFGSurfaceControl.get());
+ fillSurfaceRGBA8(child, 200, 200, 200);
+ fillSurfaceRGBA8(relative, 100, 100, 100);
+
+ SurfaceComposerClient::Transaction()
+ .show(child)
+ // Set relative layer below fg layer but relative to child layer so it should be shown
+ // above child layer.
+ .setLayer(relative, -1)
+ .setRelativeLayer(relative, child->getHandle(), 1)
+ .show(relative)
+ .apply(true);
+
+ // Captures mFGSurfaceControl layer and its children. Relative layer is a child of fg so its
+ // relative value should be taken into account, placing it above child layer.
+ ScreenCapture::captureLayers(&mCapture, fgHandle);
+ mCapture->expectFGColor(10, 10);
+ // Relative layer is showing on top of child layer
+ mCapture->expectColor(Rect(0, 0, 9, 9), {100, 100, 100, 255});
+}
// In the following tests we verify successful skipping of a parent layer,
// so we use the same verification logic and only change how we mutate
generated by cgit v1.2.3-59-g8ed1b (git 2.39.0) at 2025-12-28 14:12:22 +0000