libretro / libretro/RetroArch

[Feature Request] Maximum Integer Scale Resolution

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feature request
Dominant language
C
Stars
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Forks
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Avg merge
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Merged PRs (30d)
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Description

On a 4K display using integer scaling and Aspect Ratio: Core provided, games which mix 240p and 480i/480p modes scale those modes to different final resolutions, (Core provided)x2160 for 240 (9x integer scale), and (Core provided)x1920 for 480 (4x integer scale), resulting in an inconsistent presentation.

If we could define a maximum allowed final integer scaled resolution on a per-axis basis, this could be avoided, without losing the benefits of Aspect Ratio: Core provided or Fullscreen.

Example: if we could set Maximum Integer Scale Resolution (Y) to "1920", both 240p and 480i/480p would scale to a consistent (Core provided)x1920.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by tracing RetroArch's integer scaling and Aspect Ratio: Core provided display configuration, focusing on how 240p and 480i/480p modes calculate final resolutions. The feature is done when per-axis maximum integer-scaled resolutions can be configured and both modes consistently use the configured Y limit, including with Core provided or Fullscreen aspect settings.

Written by the indexing model from the issue text.

Assessment

Tech stack
c
Domain
computer-graphics
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
45/100

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