SurfaceFlinger and libgui: Support for child layers.
Add support for parenting Layers in a tree. Layers
follow scene-graph style rules, that is to say:
1. A child is cropped to the final bounds of the parent.
2. A child inherits the parent's transform (including position)
3. A child's Z ordering is relative to the parent and bounded between
the parents siblings.
4. A childs lifetime is bounded by it's parents lifetime.
Test: New tests in Transaction_test plus manual testing with later branches.
Change-Id: I96f8ad863665b9a70b6f845561344c297b7e6eff
diff --git a/libs/gui/SurfaceComposerClient.cpp b/libs/gui/SurfaceComposerClient.cpp
index 540dbd9..c2be6eb 100644
--- a/libs/gui/SurfaceComposerClient.cpp
+++ b/libs/gui/SurfaceComposerClient.cpp
@@ -610,13 +610,19 @@
uint32_t w,
uint32_t h,
PixelFormat format,
- uint32_t flags)
+ uint32_t flags,
+ SurfaceControl* parent)
{
sp<SurfaceControl> sur;
if (mStatus == NO_ERROR) {
sp<IBinder> handle;
+ sp<IBinder> parentHandle;
sp<IGraphicBufferProducer> gbp;
- status_t err = mClient->createSurface(name, w, h, format, flags,
+
+ if (parent != nullptr) {
+ parentHandle = parent->getHandle();
+ }
+ status_t err = mClient->createSurface(name, w, h, format, flags, parentHandle,
&handle, &gbp);
ALOGE_IF(err, "SurfaceComposerClient::createSurface error %s", strerror(-err));
if (err == NO_ERROR) {