# Canvas.CacheImageBgra8

Cache image bgra8 through the Canvas runtime.

Last updated: 2026-09-09

Package: runtime.Canvas | Status: registered-intrinsic

Tags: builtin, canvas, cpu, yeho

Built into Yeho; no package import is needed. Native services require an admitted host and the correct resource lifecycle.

```yh
Canvas.CacheImageBgra8(text resource_id, int generation, text content_identity, text BGRA8_hex_payload, int source_width, int source_height) -> bool
```


## Call Canvas.CacheImageBgra8

A complete typed caller with illustrative arguments. Native operations need the corresponding host and resources.

Verification: type checked

```yh
text resource_id = "resource id"
int generation = 1
text content_identity = "content identity"
text BGRA8_hex_payload = "BGRA8 hex payload"
int source_width = 1
int source_height = 1
bool result = Canvas.CacheImageBgra8(resource_id, generation, content_identity, BGRA8_hex_payload, source_width, source_height)
Console.Log(Text.From(result))

```

Save this beside start.yh as project.mech:

```toml
manifestVersion = "2"
package = "api.example.runtime__canvas_cacheimagebgra8"
version = "0.1.0"
languageEdition = "yeho-core-2026.1"

[app]
kind = "headless"

```

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/runtime--Canvas.CacheImageBgra8/usage --backend cpu-oracle -o /tmp/yeho-example
/tmp/yeho-example
```


The example checks the call shape. Opening windows, recording audio, changing files, network operations, and process operations have real effects when run. Follow the corresponding package lifecycle before using live resources.

Source: yeho/src/compiler/common/intrinsic_registry.cpp

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