[yojen7]

Description

Part of #1489. RapidRAW's exports are sRGB-encoded (the render ends in linear_to_srgb / AgX), but they carry no color profile. Color-managed apps, print services and soft-proofing tools then have to guess, and some assume something other than sRGB.

This embeds a small sRGB profile in JPEG and PNG exports through image's ImageEncoder::set_icc_profile. Pixel data is unchanged. TIFF will follow after #1752 lands, as a few lines in its TIFF writer (agreed with its author in #1752).

The profile is sRGB-v2-magic.icc (736 bytes, CC0-1.0) from saucecontrol/Compact-ICC-Profiles, with description "sRGB". The even smaller "micro" variant reports its name as "uRGB", which could confuse labs and apps that display or check the profile name.

Type of Change

• New feature

Changes Made

• src-tauri/icc/sRGB-v2-magic.icc plus a short README with its source and license.
• export_processing.rs: const SRGB_ICC_PROFILE = include_bytes!(…). The JPEG and PNG branches of encode_image_to_bytes set it on their encoders (PNG now uses PngEncoder with write_with_encoder instead of write_to). The TIFF branch is unchanged.
• WebP, AVIF and JPEG XL are untouched for now (different encoders); happy to follow up. TIFF follows after fix: write EXIF metadata and the sRGB profile into TIFF exports #1752.

Testing

• These changes were tested locally by a human and confirmed to work. (Tested by the agent on Linux as described below; a human reviewed the change and results.)
• I haven't added any automated tests to the code because the codebase currently lacks a test suite.

Headless export of a Sony A7C II raw on Linux (Arch/Omarchy, Intel Arc 140V), checked with ImageMagick identify (%[icc:description]):

Export	Profile
JPEG, with and without --keep-metadata	sRGB (the EXIF patching keeps it)
PNG, with and without --keep-metadata	sRGB

• The embedded profile is byte-identical to the bundled file.
• cargo fmt --check clean; the build has no new warnings.

Checklist

• My code follows the project's code style
• I haven't added unnecessary AI-generated code comments
• My changes generate no new warnings or errors

Additional Notes

• TIFF: left out on purpose to avoid conflicting with fix: write EXIF metadata and the sRGB profile into TIFF exports #1752, which rewrites the TIFF writer. Its author suggested adding the ICC tag (34675) in write_main_ifd once it lands; I'll send that as a small follow-up.
• Out of scope: wide-gamut output. The raw decoder converts camera RGB to linear sRGB and clips negatives (rawler map_3ch_to_rgb → clip_negative), so out-of-sRGB colors are gone before export. Adobe RGB/ProPhoto export (Support Custom Output Color Spaces & HDR Output #34, Feature request: Embed/select ICC color profile on export #1489) would need a wider working space, not just a different tag. Happy to share notes in Feature request: Embed/select ICC color profile on export #1489.

AI Disclaimer:

• This PR is created by an AI agent
• This PR is mostly AI-generated but edited/merged together by a human
• This PR was handwritten with AI assistance (spell check, logic suggestions, error resolving)
• This PR contains only blood, sweat, and coffee (AI-free)

🤖 Generated with Claude Code

[CyberTimon]

LGTM, thanks!