Crate tessera_ui 

Declarative UI runtime and extension APIs.

Usage

Compose with tessera, defer child content with RenderSlot, and own data with State.

Re-exports

pub use crate::accessibility::AccessibilityActionHandler;

pub use crate::accessibility::AccessibilityId;

pub use crate::accessibility::AccessibilityNode;

pub use crate::asset::Asset;

pub use crate::asset::FontAsset;

pub use crate::asset::LoadState;

pub use crate::asset::Resource;

pub use crate::asset::Source;

pub use crate::clip::ClipRegion;

pub use crate::clip::ClipShape;

pub use crate::clip::ui_stencil_state;

pub use crate::clipboard::ClipboardAction;

pub use crate::clipboard::ClipboardInput;

pub use crate::clipboard::ClipboardInputModifierNode;

pub use crate::clipboard::ClipboardResponse;

pub use crate::clipboard::ClipboardWrite;

pub use crate::clipboard::request_clipboard_action;

pub use crate::color::Color;

pub use crate::context::Context;

pub use crate::context::provide_context;

pub use crate::context::use_context;

pub use crate::dp::Dp;

pub use crate::entry_point::EntryPoint;

pub use crate::entry_registry::EntryRegistry;

pub use crate::entry_registry::TesseraPackage;

pub use crate::focus::FocusDirection;

pub use crate::focus::FocusGroupNode;

pub use crate::focus::FocusManager;

pub use crate::focus::FocusProperties;

pub use crate::focus::FocusRequester;

pub use crate::focus::FocusRestorationTarget;

pub use crate::focus::FocusScopeNode;

pub use crate::focus::FocusState;

pub use crate::focus::FocusTraversalPolicy;

pub use crate::focus::FocusTraversalStrategy;

pub use crate::geometry::FloatRect;

pub use crate::geometry::LayoutCoordinates;

pub use crate::geometry::LocalToWindow;

pub use crate::geometry::scaled_box;

pub use crate::layout::DefaultLayoutNode;

pub use crate::layout::DrawModifierHandle;

pub use crate::layout::LayoutModifierHandle;

pub use crate::layout::LayoutResult;

pub use crate::layout::NoopDrawModifier;

pub use crate::layout::RenderInput;

pub use crate::layout::RenderMetadataMut;

pub use crate::modifier::BuildModifierNode;

pub use crate::modifier::CursorModifierExt;

pub use crate::modifier::CursorModifierNode;

pub use crate::modifier::DrawModifierContent;

pub use crate::modifier::DrawModifierContext;

pub use crate::modifier::DrawModifierNode;

pub use crate::modifier::FocusModifierExt;

pub use crate::modifier::ImeInputModifierNode;

pub use crate::modifier::KeyboardInputModifierNode;

pub use crate::modifier::LayoutModifierChild;

pub use crate::modifier::LayoutModifierInput;

pub use crate::modifier::LayoutModifierNode;

pub use crate::modifier::Modifier;

pub use crate::modifier::ModifierBuildContext;

pub use crate::modifier::ParentDataMap;

pub use crate::modifier::ParentDataModifierNode;

pub use crate::modifier::PlacementModifierNode;

pub use crate::modifier::PointerInputModifierNode;

pub use crate::modifier::SemanticsModifierNode;

pub use crate::pipeline_context::PipelineContext;

pub use crate::plugin::DesktopPlatformContext;

pub use crate::plugin::DesktopWindowAction;

pub use crate::plugin::Plugin;

pub use crate::plugin::PluginContext;

pub use crate::plugin::PluginResult;

pub use crate::plugin::register_plugin;

pub use crate::plugin::register_plugin_boxed;

pub use crate::plugin::try_with_plugin;

pub use crate::plugin::try_with_plugin_mut;

pub use crate::plugin::with_plugin;

pub use crate::plugin::with_plugin_mut;

pub use crate::px::Px;

pub use crate::px::PxPosition;

pub use crate::px::PxRect;

pub use crate::px::PxSize;

pub use crate::render_module::RenderModule;

pub use crate::render_scene::Command;

pub use crate::render_scene::DrawRegion;

pub use crate::render_scene::PaddingRect;

pub use crate::render_scene::SampleRegion;

pub use crate::renderer::Renderer;

pub use crate::renderer::compute;

pub use crate::renderer::compute::ComputablePipeline;

pub use crate::renderer::compute::ComputeCommand;

pub use crate::renderer::compute::ComputePipelineRegistry;

pub use crate::renderer::core::OffscreenReadbackError;

pub use crate::renderer::drawer;

pub use crate::renderer::drawer::DrawCommand;

pub use crate::renderer::drawer::DrawablePipeline;

pub use crate::renderer::drawer::PipelineRegistry;

pub use crate::renderer::drawer::command;

pub use crate::scroll::PlatformScrollConfig;

pub use crate::scroll::normalize_platform_scroll_delta;

pub use crate::scroll::platform_scroll_config;

pub use crate::headless::HEADLESS_ENV;

pub use crate::headless::HEADLESS_FRAME_TIME_MS_ENV;

pub use crate::headless::HEADLESS_HEIGHT_ENV;

pub use crate::headless::HEADLESS_WIDTH_ENV;

pub use crate::headless::HeadlessConfig;

pub use crate::headless::HeadlessError;

pub use crate::headless::HeadlessRenderer;

pub use crate::headless::encode_png_rgba;

pub use crate::headless::headless_mode_requested;

pub use crate::headless::run_headless;

pub use crate::headless::write_png_file;

pub use window_insets::Insets;

pub use window_insets::WindowInsets;

pub use window_insets::WindowInsetsController;

pub use accesskit;

pub use wgpu;

pub use winit;

Modules

accessibility

Accessibility Support

asset

On-demand resources owned by a UI session.

clip

Shape clipping for rendered content and pointer input.

clipboard

Focused clipboard input and platform replies.

color

Linear sRGB colors.

context

Context provider

dp

Density-independent layout units.

entry_point

Application entry builder for registering packages and launching the renderer.

entry_registry

Entry package registry for renderer startup.

focus

Focus ownership, traversal, and restoration for interactive UI.

geometry

Fractional geometry and uniform coordinate transformations.

headless

Offscreen rendering, input injection, and resource observations.

layout

Layout policies and measurement.

modifier

Modifier chains for node-local layout, drawing, focus, semantics, and other node-scoped behavior.

nested_scroll

Nested scrolling through attached layout ancestry.

pipeline_context

Pipeline registration context for renderer initialization

plugin

Plugin lifecycle hooks for Tessera platform integrations.

px

Physical pixel geometry.

render_module

Custom GPU pipelines.

render_scene

Render command definitions for frame graphs

renderer

The core rendering system for the Tessera UI framework. This module provides the main Renderer struct that manages the application lifecycle, event handling, and rendering pipeline for cross-platform UI applications.

scroll

Platform scroll delta normalization helpers.

system_back

Application handling for Android system back navigation.

time

Cross-platform clocks for elapsed time and calendar dates.

window_insets

Window safe areas and keyboard occlusion. Window safe areas and on-screen keyboard occlusion.

Structs

Arena

An Arena structure containing certain [Node]s.

AxisConstraint

A single-axis layout constraint expressed as an allowed interval.

Callback

Stable, comparable callback handle for Fn().

CallbackWith

Stable, comparable callback handle for Fn(T) -> R.

ComponentTree

Respents a component tree

ComputedData

Layout information computed at the measure stage, representing the size of a node.

Constraint

A two-dimensional interval constraint.

DrawGeometry

Local drawing dimensions and their precise placement in the render target.

FrameBuffer

A distinct buffer range for commands recorded in the current frame. Its contents must not be used by a later frame.

FrameClockDiagnostics

Frame-clock work performed by a completed frame.

FrameWork

Actual work in a completed frame.

GraphicsDevice

A graphics service bound to one renderer’s device and upload queue.

GraphicsWork

Actual resource operations for a pipeline’s declared resource group.

GraphicsWorkDiagnostics

Cumulative graphics work owned by one renderer.

ImeInput

Input for IME handlers.

ImeRequest

A request to the windowing system to open an Input Method Editor (IME). This is typically used for text input components.

ImeSession

Publishes the focused editor’s text, selection and input configuration.

KeyboardEvent

An owned keyboard sample accepted from a window or synthetic input.

KeyboardInput

Input for keyboard handlers.

NodeId

A node identifier within a particular Arena.

ParentConstraint

The constraint inherited from a parent node during measurement.

PointerChange

Represents a single pointer change with timing information.

PointerInput

Input for pointer handlers.

RenderFragment

A per-component render fragment.

RenderFragmentOp

A single render op inside a fragment.

RenderGraph

Frame-level render graph.

RenderGraphOp

A render op after merging into the frame graph.

RenderSlot

Owned UI content expanded by its parent during a Tessera build.

RenderSlotWith

Stable, comparable render slot handle for Fn(T).

RuntimeSession

An owner for the resources of one UI session.

RuntimeSessionGuard

Restores the previous active session when a scoped operation finishes.

RuntimeSessionId

The identity shared by observations from one runtime session.

ScratchTexture

A pooled texture. Work recorded after it is dropped may reuse it, so keep it until all work that uses its contents is recorded.

ScratchTextureDescriptor

Describes a pooled texture requested with GraphicsDevice::scratch_texture.

ScrollEventContent

Contains scroll movement data for scroll events.

Slot

Stable, comparable slot handle for any shared callable trait object.

State

Handle to memoized state created by remember and remember_with_key.

StateOwner

Owns reactive state for a controller, route, or other explicit UI lifetime.

TrackedBuffer

A buffer whose resource group and renderer owner stay attached to uploads.

UiDispatcher

A captured delivery service for one UI session.

WeakRuntimeSession

A non-owning reference used to deliver results to a live UI session.

WorkExecution

One component, policy, or modifier execution.

WorkTotals

Cumulative work during a renderer or test session’s lifetime.

Enums

CursorEventContent

Enumeration of all possible cursor event types.

FrameNanosControl

Control flow for receive_frame_nanos callbacks.

GestureState

Describes the high-level gesture classification of a cursor event.

MeasurementError

Represents errors that can occur during node measurement.

PointerEventPass

Pointer input dispatch pass.

PressKeyEventType

Represents the different types of cursor buttons or touch interactions.

ScratchFit

How a scratch texture’s size relates to the requested size.

ScrollDeltaUnit

Indicates the unit used by the platform to describe a scroll delta.

ScrollEventSource

Indicates the input source for a scroll event.

WorkPhase

A runtime execution phase.

Constants

MOUSE_POINTER_ID

Pointer identifier reserved for mouse input.

Traits

SendSync

Thread-safety bound for abstractions that own GPU resources.

Functions

current_frame_nanos

Returns the current frame timestamp in nanoseconds from runtime origin.

current_frame_time

Returns the timestamp of the current frame, if available.

frame_delta

Returns the elapsed time since the previous frame.

key

Groups the execution of a block of code with a stable key.

receive_frame_nanos

Register a per-frame callback driven by the renderer’s frame clock.

remember

Initializes state by call order and control-flow position during a component build.

remember_with_key

Initializes state by an explicit key within the current component build.

retain

Initializes state by call order during a build, retaining it until unmount.

retain_with_key

Initializes keyed state during a build and keeps it until the component unmounts.

Type Aliases

ImeInputHandlerFn

IME-specific input handler.

KeyboardInputHandlerFn

Keyboard-specific input handler.

PointerId

Pointer identifier used by input changes.

PointerInputHandlerFn

Pointer-specific input handler.

Attribute Macros

entry

Generates platform-specific entry points from a shared run function.

lint

Sets Tessera lint levels for an item or inline module tree.

tessera

Transforms a regular Rust function into a Tessera UI component.