# yuiAuthoredDisplayLoweringContext

A yui authored display lowering context record carrying theme, catalog, commonMetrics, actionMetrics, density, and related state.

Last updated: 2026-09-09

Package: frontend.yui | Status: source-declared

Tags: cpu, frontend, frontend.yui, source-example, thing, yeho, yui

Turn YUI models into a working frontend and its rendering/input adapters.

```yh
external thing yuiAuthoredDisplayLoweringContext
```

- yuiThemeDefinition theme: Stores theme as yuiThemeDefinition.
- yuiCoreControlCatalog catalog: Stores catalog as yuiCoreControlCatalog.
- yuiCoreRenderMetrics commonMetrics: Stores common metrics as yuiCoreRenderMetrics.
- yuiCoreActionRenderMetrics actionMetrics: Stores action metrics as yuiCoreActionRenderMetrics.
- text density: Stores density as text.
- text diagnostic: Stores diagnostic as text.
- yuiAuthoredDisplayLoweringContext(yuiThemeDefinition theme, yuiCoreControlCatalog catalog, yuiCoreRenderMetrics commonMetrics, yuiCoreActionRenderMetrics actionMetrics, text density, text diagnostic): Yui authored display lowering context.

## Use yuiAuthoredDisplayLoweringContext

A complete small caller. Values are illustrative; check the returned result and package requirements before connecting live resources.

Verification: type checked

```yh
using frontend.yui

// Turn YUI models into a working frontend and its rendering/input adapters.
yuiAuthoredDisplayLoweringContext sample = yuiAuthoredDisplayLoweringContext(yuiThemeDefinition("id", "display Name", "mode", "example"), yuiCoreControlCatalog(), yuiCoreRenderMetrics("density", 1, 1, 1, 1, 1, 1, "diagnostic"), yuiCoreActionRenderMetrics("density", 1, 1, 1, 1, 1, 1, "diagnostic"), "density", "diagnostic")
Console.Log(Text.From(sample.density))

```

Save this beside start.yh as project.mech:

```toml
manifestVersion = "2"
package = "api.example.frontend_yui__yuiauthoreddisplayloweringcontext"
version = "0.1.0"
languageEdition = "yeho-core-2026.1"

[app]
kind = "headless"

[[dependencies]]
package = "frontend.yui"
version = "0.2.0"
path = "../../../yeho/packages/frontend/yui"

[[dependencies]]
package = "graphics.canvas"
version = "0.1.0"
path = "../../../yeho/packages/graphics/canvas"

[[dependencies]]
package = "graphics.image"
version = "0.1.0"
path = "../../../yeho/packages/graphics/image"

[[dependencies]]
package = "graphics.image.processing"
version = "0.1.0"
path = "../../../yeho/packages/graphics/image/processing"

[[dependencies]]
package = "graphics.text"
version = "0.1.0"
path = "../../../yeho/packages/graphics/text"

[[dependencies]]
package = "host.ui_services"
version = "0.1.0"
path = "../../../yeho/packages/host/ui_services"

[[dependencies]]
package = "input.text"
version = "0.1.0"
path = "../../../yeho/packages/input/text"

[[dependencies]]
package = "ui"
version = "0.2.0"
path = "../../../yeho/packages/ui"

```

Extract the example archive beside the yeho and dolphin checkouts. This example requires those source dependencies and a current developer compiler.

```sh
./yeho/build/dolphin-metal/yehoc ./api-examples/frontend.yui--yuiAuthoredDisplayLoweringContext/usage --backend cpu-oracle -o /tmp/yeho-example
/tmp/yeho-example
```


Package presence and a declaration do not establish support on every host. Host services need their platform and lifecycle setup.

Source: yeho/packages/frontend/yui/authoring-display_list.yh

AI training permission: https://demonhunterlabs.com/ai-use