A simple compositor base that handles a lot of things for you. More...

#include <util/comp_base.h>

Inheritance diagram for comp_base:

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Collaboration diagram for comp_base:

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Data Fields
struct xrt_compositor_native	base
	Base native compositor. More...

struct vk_bundle	vk
	Vulkan bundle of useful things, used by swapchain and fence. More...

struct os_precise_sleeper	sleeper
	For default xrt_compositor::wait_frame. More...

struct comp_swapchain_shared	cscs
	Swapchain garbage collector, used by swapchain, child class needs to call. More...

struct comp_layer_accum	layer_accum
	Collect layers for a single frame. More...

struct comp_frame_params	frame_params
	Parameters for a single frame. More...

Data Fields inherited from xrt_compositor_native
struct xrt_compositor	base
	Base. More...

Data Fields inherited from xrt_compositor
struct xrt_compositor_info	info
	Capabilities and recommended values information. More...

xrt_result_t(*	get_swapchain_create_properties )(struct xrt_compositor xc, const struct xrt_swapchain_create_info info, struct xrt_swapchain_create_properties *xsccp)
	For a given xrt_swapchain_create_info struct returns a filled out xrt_swapchain_create_properties. More...

xrt_result_t(*	create_passthrough )(struct xrt_compositor xc, const struct xrt_passthrough_create_info info)
	Create a passthrough. More...

xrt_result_t(*	create_passthrough_layer )(struct xrt_compositor xc, const struct xrt_passthrough_layer_create_info info)
	Create a passthrough layer. More...

xrt_result_t(*	destroy_passthrough )(struct xrt_compositor *xc)
	Destroy a passthrough. More...

xrt_result_t(*	set_performance_level )(struct xrt_compositor *xc, enum xrt_perf_domain domain, enum xrt_perf_set_level level)
	Set CPU/GPU performance level. More...

xrt_result_t(*	get_reference_bounds_rect )(struct xrt_compositor xc, enum xrt_reference_space_type reference_space_type, struct xrt_vec2 bounds)
	Get the extents of the reference space's bounds rectangle. More...

void(*	destroy )(struct xrt_compositor *xc)
	Teardown the compositor. More...

xrt_result_t(*	create_swapchain )(struct xrt_compositor xc, const struct xrt_swapchain_create_info info, struct xrt_swapchain **out_xsc)
	Create a swapchain with a set of images. More...

xrt_result_t(*	import_swapchain )(struct xrt_compositor xc, const struct xrt_swapchain_create_info info, struct xrt_image_native native_images, uint32_t image_count, struct xrt_swapchain *out_xsc)
	Create a swapchain from a set of native images. More...

xrt_result_t(*	import_fence )(struct xrt_compositor xc, xrt_graphics_sync_handle_t handle, struct xrt_compositor_fence *out_xcf)
	Create a compositor fence from a native sync handle. More...

xrt_result_t(*	create_semaphore )(struct xrt_compositor xc, xrt_graphics_sync_handle_t out_handle, struct xrt_compositor_semaphore **out_xcsem)
	Create a compositor semaphore, also returns a native handle. More...

xrt_result_t(*	begin_session )(struct xrt_compositor xc, const struct xrt_begin_session_info info)
	See xrBeginSession. More...

xrt_result_t(*	end_session )(struct xrt_compositor *xc)
	See xrEndSession, unlike the OpenXR one the state tracker is responsible to call discard frame before calling this function. More...

xrt_result_t(*	predict_frame )(struct xrt_compositor xc, int64_t out_frame_id, int64_t out_wake_time_ns, int64_t out_predicted_gpu_time_ns, int64_t out_predicted_display_time_ns, int64_t out_predicted_display_period_ns)
	This function and mark_frame function calls are a alternative to wait_frame. More...

xrt_result_t(*	mark_frame )(struct xrt_compositor *xc, int64_t frame_id, enum xrt_compositor_frame_point point, int64_t when_ns)
	This function and predict_frame function calls are a alternative to wait_frame. More...

xrt_result_t(*	wait_frame )(struct xrt_compositor xc, int64_t out_frame_id, int64_t out_predicted_display_time, int64_t out_predicted_display_period)
	See xrWaitFrame. More...

xrt_result_t(*	begin_frame )(struct xrt_compositor *xc, int64_t frame_id)
	See xrBeginFrame. More...

xrt_result_t(*	discard_frame )(struct xrt_compositor *xc, int64_t frame_id)
	Explicitly discard a frame. More...

xrt_result_t(*	layer_begin )(struct xrt_compositor xc, const struct xrt_layer_frame_data data)
	Begins layer submission. More...

xrt_result_t(*	layer_projection )(struct xrt_compositor xc, struct xrt_device xdev, struct xrt_swapchain xsc[XRT_MAX_VIEWS], const struct xrt_layer_data data)
	Adds a projection layer for submissions. More...

xrt_result_t(*	layer_projection_depth )(struct xrt_compositor xc, struct xrt_device xdev, struct xrt_swapchain xsc[XRT_MAX_VIEWS], struct xrt_swapchain d_xsc[XRT_MAX_VIEWS], const struct xrt_layer_data *data)
	Adds a projection layer for submission, has depth information. More...

xrt_result_t(*	layer_quad )(struct xrt_compositor xc, struct xrt_device xdev, struct xrt_swapchain xsc, const struct xrt_layer_data data)
	Adds a quad layer for submission, the center of the quad is specified by the pose and extends outwards from it. More...

xrt_result_t(*	layer_cube )(struct xrt_compositor xc, struct xrt_device xdev, struct xrt_swapchain xsc, const struct xrt_layer_data data)
	Adds a cube layer for submission. More...

xrt_result_t(*	layer_cylinder )(struct xrt_compositor xc, struct xrt_device xdev, struct xrt_swapchain xsc, const struct xrt_layer_data data)
	Adds a cylinder layer for submission. More...

xrt_result_t(*	layer_equirect1 )(struct xrt_compositor xc, struct xrt_device xdev, struct xrt_swapchain xsc, const struct xrt_layer_data data)
	Adds a equirect1 layer for submission. More...

xrt_result_t(*	layer_equirect2 )(struct xrt_compositor xc, struct xrt_device xdev, struct xrt_swapchain xsc, const struct xrt_layer_data data)
	Adds a equirect2 layer for submission. More...

xrt_result_t(*	layer_passthrough )(struct xrt_compositor xc, struct xrt_device xdev, const struct xrt_layer_data *data)
	Adds a passthrough layer for submission. More...

xrt_result_t(*	layer_commit )(struct xrt_compositor *xc, xrt_graphics_sync_handle_t sync_handle)
	Commits all of the submitted layers. More...

xrt_result_t(*	layer_commit_with_semaphore )(struct xrt_compositor xc, struct xrt_compositor_semaphore xcsem, uint64_t value)
	Commits all of the submitted layers, with a semaphore. More...

xrt_result_t(*	get_display_refresh_rate )(struct xrt_compositor xc, float out_display_refresh_rate_hz)
	Get the current display refresh rate. More...

xrt_result_t(*	request_display_refresh_rate )(struct xrt_compositor *xc, float display_refresh_rate_hz)
	Request system to change the display refresh rate to the requested value. More...

xrt_result_t(*	set_thread_hint )(struct xrt_compositor *xc, enum xrt_thread_hint hint, uint32_t thread_id)
	Set thread attributes according to thread type. More...

Protected Member Functions
void	comp_base_init (struct comp_base *cb)
	Inits all of the supported functions and structs, except vk_bundle. More...

Additional Inherited Members
Public Member Functions inherited from xrt_compositor_native
struct xrt_compositor_d3d11 *	xrt_gfx_d3d11_provider_create (struct xrt_compositor_native xcn, ID3D11Device device)
	Create a D3D11 compositor client. More...

struct xrt_compositor_d3d12 *	xrt_gfx_d3d12_provider_create (struct xrt_compositor_native xcn, ID3D12Device device, ID3D12CommandQueue *queue)
	Create a D3D12 compositor client. More...

xrt_result_t	xrt_gfx_provider_create_gl_egl (struct xrt_compositor_native xcn, EGLDisplay display, EGLConfig config, EGLContext context, PFNEGLGETPROCADDRESSPROC get_gl_procaddr, bool renderdoc_enabled, struct xrt_compositor_gl *out_xcgl)
	Create an OpenGL(ES) compositor client using EGL. More...

struct xrt_compositor_vk *	xrt_gfx_vk_provider_create (struct xrt_compositor_native *xcn, VkInstance instance, PFN_vkGetInstanceProcAddr get_instance_proc_addr, VkPhysicalDevice physical_device, VkDevice device, bool external_fence_fd_enabled, bool external_semaphore_fd_enabled, bool timeline_semaphore_enabled, bool image_format_list_enabled, bool debug_utils_enabled, bool renderdoc_enabled, uint32_t queue_family_index, uint32_t queue_index)
	Create a Vulkan compositor client. More...

struct xrt_compositor_gl *	xrt_gfx_provider_create_gl_win32 (struct xrt_compositor_native xcn, void hDC, void *hGLRC)
	Create an OpenGL compositor client using Win32. More...

struct xrt_compositor_gl *	xrt_gfx_provider_create_gl_xlib (struct xrt_compositor_native xcn, Display xDisplay, uint32_t visualid, GLXFBConfig glxFBConfig, GLXDrawable glxDrawable, GLXContext glxContext)
	Create an OpenGL compositor client using xlib. More...

Static Public Member Functions inherited from xrt_compositor_native
static xrt_result_t	xrt_comp_native_create_swapchain (struct xrt_compositor_native xcn, const struct xrt_swapchain_create_info info, struct xrt_swapchain_native **out_xscn)
	Create a native swapchain with a set of images. More...

static void	xrt_comp_native_destroy (struct xrt_compositor_native **xcn_ptr)
	Teardown the compositor. More...

Static Public Member Functions inherited from xrt_compositor
static xrt_result_t	xrt_comp_get_swapchain_create_properties (struct xrt_compositor xc, const struct xrt_swapchain_create_info info, struct xrt_swapchain_create_properties *xsccp)
	For a given xrt_swapchain_create_info struct returns a filled out xrt_swapchain_create_properties. More...

static xrt_result_t	xrt_comp_create_passthrough (struct xrt_compositor xc, const struct xrt_passthrough_create_info info)
	Create a passthrough. More...

static xrt_result_t	xrt_comp_create_passthrough_layer (struct xrt_compositor xc, const struct xrt_passthrough_layer_create_info info)
	Create a passthrough layer. More...

static xrt_result_t	xrt_comp_destroy_passthrough (struct xrt_compositor *xc)
	Destroy a passthrough. More...

static xrt_result_t	xrt_comp_get_display_refresh_rate (struct xrt_compositor xc, float out_display_refresh_rate_hz)
	Get the current display refresh rate. More...

static xrt_result_t	xrt_comp_request_display_refresh_rate (struct xrt_compositor *xc, float display_refresh_rate_hz)
	Request system to change the display refresh rate to the requested value. More...

static xrt_result_t	xrt_comp_set_performance_level (struct xrt_compositor *xc, enum xrt_perf_domain domain, enum xrt_perf_set_level level)
	Set CPU/GPU performance level. More...

static xrt_result_t	xrt_comp_get_reference_bounds_rect (struct xrt_compositor xc, enum xrt_reference_space_type reference_space_type, struct xrt_vec2 bounds)
	Get the extents of the reference space's bounds rectangle. More...

static void	xrt_comp_destroy (struct xrt_compositor **xc_ptr)
	Teardown the compositor. More...

static xrt_result_t	xrt_comp_create_swapchain (struct xrt_compositor xc, const struct xrt_swapchain_create_info info, struct xrt_swapchain **out_xsc)
	Create a swapchain with a set of images. More...

static xrt_result_t	xrt_comp_import_swapchain (struct xrt_compositor xc, const struct xrt_swapchain_create_info info, struct xrt_image_native native_images, uint32_t image_count, struct xrt_swapchain *out_xsc)
	Create a swapchain from a set of native images. More...

static xrt_result_t	xrt_comp_import_fence (struct xrt_compositor xc, xrt_graphics_sync_handle_t handle, struct xrt_compositor_fence *out_xcf)
	Create a compositor fence from a native sync handle. More...

static xrt_result_t	xrt_comp_create_semaphore (struct xrt_compositor xc, xrt_graphics_sync_handle_t out_handle, struct xrt_compositor_semaphore **out_xcsem)
	Create a compositor semaphore, also returns a native handle. More...

static xrt_result_t	xrt_comp_begin_session (struct xrt_compositor xc, const struct xrt_begin_session_info info)
	See xrBeginSession. More...

static xrt_result_t	xrt_comp_end_session (struct xrt_compositor *xc)
	See xrEndSession, unlike the OpenXR one the state tracker is responsible to call discard frame before calling this function. More...

static xrt_result_t	xrt_comp_predict_frame (struct xrt_compositor xc, int64_t out_frame_id, int64_t out_wake_time_ns, int64_t out_predicted_gpu_time_ns, int64_t out_predicted_display_time_ns, int64_t out_predicted_display_period_ns)
	This function and mark_frame function calls are a alternative to wait_frame. More...

static xrt_result_t	xrt_comp_mark_frame (struct xrt_compositor *xc, int64_t frame_id, enum xrt_compositor_frame_point point, int64_t when_ns)
	This function and predict_frame function calls are a alternative to wait_frame. More...

static xrt_result_t	xrt_comp_wait_frame (struct xrt_compositor xc, int64_t out_frame_id, int64_t out_predicted_display_time, int64_t out_predicted_display_period)
	See xrWaitFrame. More...

static xrt_result_t	xrt_comp_begin_frame (struct xrt_compositor *xc, int64_t frame_id)
	See xrBeginFrame. More...

static xrt_result_t	xrt_comp_discard_frame (struct xrt_compositor *xc, int64_t frame_id)
	Explicitly discard a frame. More...

static xrt_result_t	xrt_comp_layer_begin (struct xrt_compositor xc, const struct xrt_layer_frame_data data)
	Begins layer submission. More...

static xrt_result_t	xrt_comp_layer_projection (struct xrt_compositor xc, struct xrt_device xdev, struct xrt_swapchain xsc[XRT_MAX_VIEWS], const struct xrt_layer_data data)
	Adds a projection layer for submissions. More...

static xrt_result_t	xrt_comp_layer_projection_depth (struct xrt_compositor xc, struct xrt_device xdev, struct xrt_swapchain xsc[XRT_MAX_VIEWS], struct xrt_swapchain d_xsc[XRT_MAX_VIEWS], const struct xrt_layer_data *data)
	Adds a projection layer for submission, has depth information. More...

static xrt_result_t	xrt_comp_layer_quad (struct xrt_compositor xc, struct xrt_device xdev, struct xrt_swapchain xsc, const struct xrt_layer_data data)
	Adds a quad layer for submission, the center of the quad is specified by the pose and extends outwards from it. More...

static xrt_result_t	xrt_comp_layer_cube (struct xrt_compositor xc, struct xrt_device xdev, struct xrt_swapchain xsc, const struct xrt_layer_data data)
	Adds a cube layer for submission. More...

static xrt_result_t	xrt_comp_layer_cylinder (struct xrt_compositor xc, struct xrt_device xdev, struct xrt_swapchain xsc, const struct xrt_layer_data data)
	Adds a cylinder layer for submission. More...

static xrt_result_t	xrt_comp_layer_equirect1 (struct xrt_compositor xc, struct xrt_device xdev, struct xrt_swapchain xsc, const struct xrt_layer_data data)
	Adds a equirect1 layer for submission. More...

static xrt_result_t	xrt_comp_layer_equirect2 (struct xrt_compositor xc, struct xrt_device xdev, struct xrt_swapchain xsc, const struct xrt_layer_data data)
	Adds a equirect2 layer for submission. More...

static xrt_result_t	xrt_comp_layer_passthrough (struct xrt_compositor xc, struct xrt_device xdev, const struct xrt_layer_data *data)
	Adds a passthrough layer for submission. More...

static xrt_result_t	xrt_comp_layer_commit (struct xrt_compositor *xc, xrt_graphics_sync_handle_t sync_handle)
	Commits all of the submitted layers. More...

static xrt_result_t	xrt_comp_layer_commit_with_semaphore (struct xrt_compositor xc, struct xrt_compositor_semaphore xcsem, uint64_t value)
	Commits all of the submitted layers, with a semaphore. More...

Detailed Description

A simple compositor base that handles a lot of things for you.

Things it handles for you:

App swapchains
App fences
Vulkan bundle (needed for swapchains and fences)
Layer tracking, not xrt_compositor::layer_commit
Wait function, not xrt_compositor::predict_frame

Functions it does not implement:

Partially implements xrt_compositor_native, meant to serve as the base of a main compositor implementation.

Member Function Documentation

◆ comp_base_init()

void comp_base_init ( struct comp_base * cb )

protected

Inits all of the supported functions and structs, except vk_bundle.

The bundle needs to be initialised before any of the implemented functions are call, but is not required to be initialised before this function is called.

References base, xrt_compositor_native::base, base_create_semaphore(), base_create_swapchain(), base_get_swapchain_create_properties(), base_import_fence(), base_import_swapchain(), xrt_compositor::create_semaphore, xrt_compositor::create_swapchain, xrt_compositor::get_swapchain_create_properties, xrt_compositor::import_fence, xrt_compositor::import_swapchain, and xrt_compositor::layer_begin.