feat(upscaling): custom DLSS preset

[vanni-giachin]

Customizable DLSS AI model preset.

Summary by CodeRabbit

• New Features

  • Added DLSS Model Preset selection with five configurable options (Default, J, K, L, M) to upscaling settings.
  • Extended DLSS configuration UI with a new combo dropdown for model preset selection and hover tooltip for preset descriptions.

• Bug Fixes

  • Added validation to clamp preset values to valid range on settings load, with fallback to default if out-of-range.

[coderabbitai]

📝 Walkthrough

Walkthrough

The pull request introduces a new configurable DLSS model preset feature to the Upscaling system. A presetDLSS field (uint, range [0,4]) was added to Upscaling::Settings, extended the UI to include a DLSS Model Preset selector with validation and tooltips, and modified the Streamline integration to apply the selected preset to DLSS options.

Changes

Cohort / File(s)	Summary
Settings Declaration src/Features/Upscaling.h	Added new public field presetDLSS (uint) to Upscaling::Settings struct, defaulting to 0, to represent DLSS model preset selection.
Settings Implementation & UI Integration src/Features/Upscaling.cpp	Extended settings loading with validation that clamps presetDLSS to range [0,4], resetting out-of-range values to 0 with warning. Wired new DLSS Model Preset combo box into UI with five options and descriptive hover tooltip.
DLSS Preset Application src/Features/Upscaling/Streamline.cpp	Introduced custom preset handling in SetDLSSOptions that maps settings.presetDLSS values (1–4) to specific DLSS presets (J–M) and applies uniformly across DLSS-related fields, while preserving fallback behavior for unsupported or default cases.

Sequence Diagram

sequenceDiagram
    actor User
    participant UI as UI System
    participant Settings as Settings Loader
    participant Streamline as SetDLSSOptions
    participant DLSS as DLSS API

    User->>UI: Select DLSS Model Preset (0-4)
    UI->>Settings: Load settings with presetDLSS value
    Settings->>Settings: Validate presetDLSS range [0,4]
    Settings->>Streamline: Pass validated presetDLSS to SetDLSSOptions
    alt Custom Preset Selected (1-4)
        Streamline->>DLSS: Apply mapped preset (J/K/L/M) to all DLSS fields
    else Default or Out-of-Range
        Streamline->>DLSS: Apply fallback preset distribution based on RTX series
    end
    DLSS-->>Streamline: Presets configured
    Streamline-->>UI: Configuration applied

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Estimated Code Review Effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Possibly Related PRs

• PR #1684: Modifies DLSS preset handling and wires presets through UI and Streamline options in the same codebase areas.
• PR #1783: Adjusts DLSS preset behavior and Upscaling::Settings configuration with similar preset integration patterns.
• PR #1824: Modifies DLSS preset selection logic in SetDLSSOptions and RTX series detection within the same Streamline preset mapping.

Suggested Reviewers

• doodlum
• alandtse
• davo0411

Poem

🐰 A preset path now blooms so bright,
Five options dancing—Default, J, K, L, and M's might!
Streamline whispers presets true,
Validating ranges with a hop and a chew. ✨

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'feat(upscaling): custom DLSS preset' directly and concisely describes the main feature added across all modified files: introducing a customizable DLSS model preset option to the upscaling settings.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[github-actions]

Using provided base ref: b3db5a7
Using base ref: b3db5a7
Base commit date: 2026-02-07T13:47:32+10:00 (Saturday, February 07, 2026 01:47 PM)
No actionable suggestions for changed features.

[github-actions]

✅ A pre-release build is available for this PR:
Download

[doodlum]

This looks good. I like that it's showing the only actual presets available nowadays, and has a default option.