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0209-static-icon-capability.md

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Static Icon Capability

  • Proposal: SDL-0209
  • Author: Joel Fischer
  • Status: Accepted with Revisions
  • Impacted Platforms: [RPC / HMI]

Introduction

Add a capability for app developers to know if static icons are available on a connected head unit.

Motivation

Currently, any app developer building their app with static icons has no way to know if a connected head unit supports those static icons. We should add a capability for the developer to know if static icons exist or not.

Proposed solution

The proposed solution is to add a new RPC boolean describing whether or not static icons are supported. This capability therefore means to the app developer that they can assume that all static icons are supported.

Mobile HMI Changes

<struct name="DisplayCapabilities" since="1.0">
    <!-- ... -->
    <param name="imageCapabilities" type="ImageType" array="true" minsize="0" maxsize="1000" mandatory="false">
</struct>

Potential downsides

In this proposal there is no room for granular support of some icons but not others.

If a future set of icons were ever enabled, however, then we could add a new capability, e.g. staticIconsSetV2Supported.

Impact on existing code

This would be a minor version change to all affected platforms.

Alternatives considered

  1. We could change the name of the parameter to staticIconsSetV1Supported for additional future-proofing.