class BufferCollageFlatland
Defined at line 80 of file ../../src/camera/bin/camera-gym/buffer_collage_flatland.h
This class takes ownership of the display and presents the contents of buffer collections in a
grid pattern. Unless otherwise noted, public methods are thread-safe and private methods must
only be called from the loop's thread.
Public Methods
void ~BufferCollageFlatland ()Defined at line 49 of file ../../src/camera/bin/camera-gym/buffer_collage_flatland.cc
fpromise::result<std::unique_ptr<BufferCollageFlatland>, zx_status_t> Create (std::unique_ptr<simple_present::FlatlandConnection> flatland_connection, fuchsia::ui::composition::AllocatorHandle flatland_allocator, fuchsia::element::GraphicalPresenterHandle graphical_presenter, fuchsia::sysmem2::AllocatorHandle sysmem_allocator, fit::closure stop_callback)Creates a new BufferCollage instance using the provided interface handles. After returning, if
the instance stops running, either due to an error or explicit action, |stop_callback| is
invoked exactly once if non-null.
Defined at line 56 of file ../../src/camera/bin/camera-gym/buffer_collage_flatland.cc
fpromise::promise<uint32_t> AddCollection (fuchsia::sysmem2::BufferCollectionTokenHandle token, fuchsia::images2::ImageFormat image_format, std::string description)Called by stream_cycler when a new camera stream is available.
Defined at line 95 of file ../../src/camera/bin/camera-gym/buffer_collage_flatland.cc
void RemoveCollection (uint32_t collection_id)Removes the collection with the given |collection_id| from the view and updates the layout to
fill the vacated space. If |id| is not a valid collection, the instance stops.
Defined at line 225 of file ../../src/camera/bin/camera-gym/buffer_collage_flatland.cc
void PostShowBuffer (uint32_t collection_id, uint32_t buffer_index, zx::eventpair * release_fence, std::optional<fuchsia::math::RectF> subregion)Updates the view to show the given |buffer_index| in for the given |collection_id|'s node.
Holds |release_fence| until the buffer is no longer needed, then closes the handle. If
non-null, |subregion| specifies what sub-region of the buffer to highlight.
Defined at line 267 of file ../../src/camera/bin/camera-gym/buffer_collage_flatland.cc
void PresentView ()Present view to graphical presenter.
Defined at line 393 of file ../../src/camera/bin/camera-gym/buffer_collage_flatland.cc