<?xml version="1.0" encoding="UTF-8" ?>
<class name="OpenXRAPIExtension" inherits="RefCounted" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../doc/class.xsd">
	<brief_description>
		Makes the OpenXR API available for GDExtension.
	</brief_description>
	<description>
		[OpenXRAPIExtension] makes OpenXR available for GDExtension. It provides the OpenXR API to GDExtension through the [method get_instance_proc_addr] method, and the OpenXR instance through [method get_instance].
		It also provides methods for querying the status of OpenXR initialization, and helper methods for ease of use of the API with GDExtension.
	</description>
	<tutorials>
		<link title="XrResult documentation">https://registry.khronos.org/OpenXR/specs/1.0/man/html/XrResult.html</link>
		<link title="XrInstance documentation">https://registry.khronos.org/OpenXR/specs/1.0/man/html/XrInstance.html</link>
		<link title="XrSpace documentation">https://registry.khronos.org/OpenXR/specs/1.0/man/html/XrSpace.html</link>
		<link title="XrSession documentation">https://registry.khronos.org/OpenXR/specs/1.0/man/html/XrSession.html</link>
		<link title="XrSystemId documentation">https://registry.khronos.org/OpenXR/specs/1.0/man/html/XrSystemId.html</link>
		<link title="xrBeginSession documentation">https://registry.khronos.org/OpenXR/specs/1.0/man/html/xrBeginSession.html</link>
		<link title="XrPosef documentation">https://registry.khronos.org/OpenXR/specs/1.0/man/html/XrPosef.html</link>
	</tutorials>
	<methods>
		<method name="action_get_handle">
			<return type="int" />
			<param index="0" name="action" type="RID" />
			<description>
				Returns the corresponding [code]XrAction[/code] OpenXR handle for the given action RID.
			</description>
		</method>
		<method name="begin_debug_label_region">
			<return type="void" />
			<param index="0" name="label_name" type="String" />
			<description>
				Begins a new debug label region, this label will be reported in debug messages for any calls following this until [method end_debug_label_region] is called. Debug labels can be stacked.
			</description>
		</method>
		<method name="can_render">
			<return type="bool" />
			<description>
				Returns [code]true[/code] if OpenXR is initialized for rendering with an XR viewport.
			</description>
		</method>
		<method name="end_debug_label_region">
			<return type="void" />
			<description>
				Marks the end of a debug label region. Removes the latest debug label region added by calling [method begin_debug_label_region].
			</description>
		</method>
		<method name="find_action">
			<return type="RID" />
			<param index="0" name="name" type="String" />
			<param index="1" name="action_set" type="RID" />
			<description>
				Returns the [RID] corresponding to an [code]Action[/code] of a matching name, optionally limited to a specified action set.
			</description>
		</method>
		<method name="get_error_string">
			<return type="String" />
			<param index="0" name="result" type="int" />
			<description>
				Returns an error string for the given [url=https://registry.khronos.org/OpenXR/specs/1.0/man/html/XrResult.html]XrResult[/url].
			</description>
		</method>
		<method name="get_hand_tracker">
			<return type="int" />
			<param index="0" name="hand_index" type="int" />
			<description>
				Returns the corresponding [code]XRHandTrackerEXT[/code] handle for the given hand index value.
			</description>
		</method>
		<method name="get_instance">
			<return type="int" />
			<description>
				Returns the [url=https://registry.khronos.org/OpenXR/specs/1.0/man/html/XrInstance.html]XrInstance[/url] created during the initialization of the OpenXR API.
			</description>
		</method>
		<method name="get_instance_proc_addr">
			<return type="int" />
			<param index="0" name="name" type="String" />
			<description>
				Returns the function pointer of the OpenXR function with the specified name, cast to an integer. If the function with the given name does not exist, the method returns [code]0[/code].
				[b]Note:[/b] [code]openxr/util.h[/code] contains utility macros for acquiring OpenXR functions, e.g. [code]GDEXTENSION_INIT_XR_FUNC_V(xrCreateAction)[/code].
			</description>
		</method>
		<method name="get_next_frame_time">
			<return type="int" />
			<description>
				Returns the predicted display timing for the next frame.
			</description>
		</method>
		<method name="get_play_space">
			<return type="int" />
			<description>
				Returns the play space, which is an [url=https://registry.khronos.org/OpenXR/specs/1.0/man/html/XrSpace.html]XrSpace[/url] cast to an integer.
			</description>
		</method>
		<method name="get_predicted_display_time">
			<return type="int" />
			<description>
				Returns the predicted display timing for the current frame.
			</description>
		</method>
		<method name="get_projection_layer">
			<return type="int" />
			<description>
				Returns a pointer to the render state's [code]XrCompositionLayerProjection[/code] struct.
				[b]Note:[/b] This method should only be called from the rendering thread.
			</description>
		</method>
		<method name="get_render_state_z_far">
			<return type="float" />
			<description>
				Returns the far boundary value of the camera frustum.
				[b]Note:[/b] This is only accessible in the render thread.
			</description>
		</method>
		<method name="get_render_state_z_near">
			<return type="float" />
			<description>
				Returns the near boundary value of the camera frustum.
				[b]Note:[/b] This is only accessible in the render thread.
			</description>
		</method>
		<method name="get_session">
			<return type="int" />
			<description>
				Returns the OpenXR session, which is an [url=https://registry.khronos.org/OpenXR/specs/1.0/man/html/XrSession.html]XrSession[/url] cast to an integer.
			</description>
		</method>
		<method name="get_supported_swapchain_formats">
			<return type="PackedInt64Array" />
			<description>
				Returns an array of supported swapchain formats.
			</description>
		</method>
		<method name="get_swapchain_format_name">
			<return type="String" />
			<param index="0" name="swapchain_format" type="int" />
			<description>
				Returns the name of the specified swapchain format.
			</description>
		</method>
		<method name="get_system_id">
			<return type="int" />
			<description>
				Returns the id of the system, which is a [url=https://registry.khronos.org/OpenXR/specs/1.0/man/html/XrSystemId.html]XrSystemId[/url] cast to an integer.
			</description>
		</method>
		<method name="insert_debug_label">
			<return type="void" />
			<param index="0" name="label_name" type="String" />
			<description>
				Inserts a debug label, this label is reported in any debug message resulting from the OpenXR calls that follows, until any of [method begin_debug_label_region], [method end_debug_label_region], or [method insert_debug_label] is called.
			</description>
		</method>
		<method name="is_environment_blend_mode_alpha_supported">
			<return type="int" enum="OpenXRAPIExtension.OpenXRAlphaBlendModeSupport" />
			<description>
				Returns [enum OpenXRAPIExtension.OpenXRAlphaBlendModeSupport] denoting if [constant XRInterface.XR_ENV_BLEND_MODE_ALPHA_BLEND] is really supported, emulated or not supported at all.
			</description>
		</method>
		<method name="is_initialized">
			<return type="bool" />
			<description>
				Returns [code]true[/code] if OpenXR is initialized.
			</description>
		</method>
		<method name="is_running">
			<return type="bool" />
			<description>
				Returns [code]true[/code] if OpenXR is running ([url=https://registry.khronos.org/OpenXR/specs/1.0/man/html/xrBeginSession.html]xrBeginSession[/url] was successfully called and the swapchains were created).
			</description>
		</method>
		<method name="openxr_is_enabled" qualifiers="static">
			<return type="bool" />
			<param index="0" name="check_run_in_editor" type="bool" />
			<description>
				Returns [code]true[/code] if OpenXR is enabled.
			</description>
		</method>
		<method name="openxr_swapchain_acquire">
			<return type="void" />
			<param index="0" name="swapchain" type="int" />
			<description>
				Acquires the image of the provided swapchain.
			</description>
		</method>
		<method name="openxr_swapchain_create">
			<return type="int" />
			<param index="0" name="create_flags" type="int" />
			<param index="1" name="usage_flags" type="int" />
			<param index="2" name="swapchain_format" type="int" />
			<param index="3" name="width" type="int" />
			<param index="4" name="height" type="int" />
			<param index="5" name="sample_count" type="int" />
			<param index="6" name="array_size" type="int" />
			<description>
				Returns a pointer to a new swapchain created using the provided parameters.
			</description>
		</method>
		<method name="openxr_swapchain_free">
			<return type="void" />
			<param index="0" name="swapchain" type="int" />
			<description>
				Destroys the provided swapchain and frees it from memory.
			</description>
		</method>
		<method name="openxr_swapchain_get_image">
			<return type="RID" />
			<param index="0" name="swapchain" type="int" />
			<description>
				Returns the RID of the provided swapchain's image.
			</description>
		</method>
		<method name="openxr_swapchain_get_swapchain">
			<return type="int" />
			<param index="0" name="swapchain" type="int" />
			<description>
				Returns the [code]XrSwapchain[/code] handle of the provided swapchain.
			</description>
		</method>
		<method name="openxr_swapchain_release">
			<return type="void" />
			<param index="0" name="swapchain" type="int" />
			<description>
				Releases the image of the provided swapchain.
			</description>
		</method>
		<method name="register_composition_layer_provider">
			<return type="void" />
			<param index="0" name="extension" type="OpenXRExtensionWrapperExtension" />
			<description>
				Registers the given extension as a composition layer provider.
			</description>
		</method>
		<method name="register_projection_views_extension">
			<return type="void" />
			<param index="0" name="extension" type="OpenXRExtensionWrapperExtension" />
			<description>
				Registers the given extension as a provider of additional data structures to projections views.
			</description>
		</method>
		<method name="set_emulate_environment_blend_mode_alpha_blend">
			<return type="void" />
			<param index="0" name="enabled" type="bool" />
			<description>
				If set to [code]true[/code], an OpenXR extension is loaded which is capable of emulating the [constant XRInterface.XR_ENV_BLEND_MODE_ALPHA_BLEND] blend mode.
			</description>
		</method>
		<method name="set_object_name">
			<return type="void" />
			<param index="0" name="object_type" type="int" />
			<param index="1" name="object_handle" type="int" />
			<param index="2" name="object_name" type="String" />
			<description>
				Set the object name of an OpenXR object, used for debug output. [param object_type] must be a valid OpenXR [code]XrObjectType[/code] enum and [param object_handle] must be a valid OpenXR object handle.
			</description>
		</method>
		<method name="set_render_region">
			<return type="void" />
			<param index="0" name="render_region" type="Rect2i" />
			<description>
				Sets the render region to [param render_region], overriding the normal render target's rect.
			</description>
		</method>
		<method name="set_velocity_depth_texture">
			<return type="void" />
			<param index="0" name="render_target" type="RID" />
			<description>
				Sets the render target of the velocity depth texture.
			</description>
		</method>
		<method name="set_velocity_target_size">
			<return type="void" />
			<param index="0" name="target_size" type="Vector2i" />
			<description>
				Sets the target size of the velocity and velocity depth textures.
			</description>
		</method>
		<method name="set_velocity_texture">
			<return type="void" />
			<param index="0" name="render_target" type="RID" />
			<description>
				Sets the render target of the velocity texture.
			</description>
		</method>
		<method name="transform_from_pose">
			<return type="Transform3D" />
			<param index="0" name="pose" type="const void*" />
			<description>
				Creates a [Transform3D] from an [url=https://registry.khronos.org/OpenXR/specs/1.0/man/html/XrPosef.html]XrPosef[/url].
			</description>
		</method>
		<method name="unregister_composition_layer_provider">
			<return type="void" />
			<param index="0" name="extension" type="OpenXRExtensionWrapperExtension" />
			<description>
				Unregisters the given extension as a composition layer provider.
			</description>
		</method>
		<method name="unregister_projection_views_extension">
			<return type="void" />
			<param index="0" name="extension" type="OpenXRExtensionWrapperExtension" />
			<description>
				Unregisters the given extension as a provider of additional data structures to projections views.
			</description>
		</method>
		<method name="xr_result">
			<return type="bool" />
			<param index="0" name="result" type="int" />
			<param index="1" name="format" type="String" />
			<param index="2" name="args" type="Array" />
			<description>
				Returns [code]true[/code] if the provided [url=https://registry.khronos.org/OpenXR/specs/1.0/man/html/XrResult.html]XrResult[/url] (cast to an integer) is successful. Otherwise returns [code]false[/code] and prints the [url=https://registry.khronos.org/OpenXR/specs/1.0/man/html/XrResult.html]XrResult[/url] converted to a string, with the specified additional information.
			</description>
		</method>
	</methods>
	<constants>
		<constant name="OPENXR_ALPHA_BLEND_MODE_SUPPORT_NONE" value="0" enum="OpenXRAlphaBlendModeSupport">
			Means that [constant XRInterface.XR_ENV_BLEND_MODE_ALPHA_BLEND] isn't supported at all.
		</constant>
		<constant name="OPENXR_ALPHA_BLEND_MODE_SUPPORT_REAL" value="1" enum="OpenXRAlphaBlendModeSupport">
			Means that [constant XRInterface.XR_ENV_BLEND_MODE_ALPHA_BLEND] is really supported.
		</constant>
		<constant name="OPENXR_ALPHA_BLEND_MODE_SUPPORT_EMULATING" value="2" enum="OpenXRAlphaBlendModeSupport">
			Means that [constant XRInterface.XR_ENV_BLEND_MODE_ALPHA_BLEND] is emulated.
		</constant>
	</constants>
</class>