# YuiRetainedImagePresentationExecutionEqualV1

Retained equality is an execution contract, not a diagnostic formatting contract. Keep every field which can change pixels, batching, native cache selection, or command ordering here so all retained consumers share one lossless predicate.

Last updated: 2026-09-09

Package: ui | Status: source-declared

Tags: cpu, function, source-example, ui, yeho

Build YUI's reusable control, layout, interaction, text, accessibility, and retained-rendering models.

```yh
external YuiRetainedImagePresentationExecutionEqualV1(yuiRenderImagePresentation left, yuiRenderImagePresentation right) returns bool
```


## Use YuiRetainedImagePresentationExecutionEqualV1

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

Verification: type checked

```yh
using ui

// Build YUI's reusable control, layout, interaction, text, accessibility, and retained-rendering models.
yuiRenderImagePresentation left = yuiRenderImagePresentation("fit", 1, 1, 1, 1, 1, 1, 1, 1)
yuiRenderImagePresentation right = yuiRenderImagePresentation("fit", 1, 1, 1, 1, 1, 1, 1, 1)
bool result = YuiRetainedImagePresentationExecutionEqualV1(left, right)
Console.Log(Text.From(result))

```

Save this beside start.yh as project.mech:

```toml
manifestVersion = "2"
package = "api.example.ui__yuiretainedimagepresentationexecutionequalv1"
version = "0.1.0"
languageEdition = "yeho-core-2026.1"

[app]
kind = "headless"

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

[[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 = "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/ui--YuiRetainedImagePresentationExecutionEqualV1/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/ui/render-50-retained-fragments.yh

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