melonDS-android v0.7.0.rc2 Major Vulkan Performance Upgrade and support for Retroarch Shaders Presets!

[SapphireRhodonite]

A major Vulkan performance upgrade, new shader pipeline support, requested features, and broader device compatibility improvements.

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New Features:

• New Simple Vulkan Pipeline Path
  Added a new simple Vulkan pipeline path focused on significantly improving performance for the Vulkan renderer profile.

  To use it:

  • select Vulkan as the renderer
  • go to Video Settings
  • make sure Use simple pipeline is enabled

  This mode is much more efficient and should provide a major performance improvement for Vulkan on many devices.

  It still has some remaining bugs that are being worked on, and the goal for RC3 is to bring it closer to parity with the more complex compute-based Vulkan path.

• librashader Support for Vulkan / RetroArch Shader Presets
  Added support for librashader on Vulkan.

  This allows Vulkan to move away from the old .msha shader format and instead use RetroArch shader presets (.slangp).

  Recommended setup:

  • download and extract slang-shaders
  • in settings, set RetroArch shader root to the extracted slang-shaders folder
  • make sure that folder contains the full shader directory structure such as:
    • anamorphic
    • border
    • handheld
    • and the other shader folders
  • then use Relative .slangp path inside the selected shader root to browse to and select the shader preset you want

  If you need to create new presets, it is recommended to do so using RetroArch or by editing the preset files manually.

• Slot-2 Analog Input Support
  Added support for Slot-2 analog input for games such as Super Mario 64 DS using the patched ROM workflow described here: PATCHES.md

  To use it:

  • patch the ROM according to its region
  • map the Slot-2 analog axes in input settings
  • select Analog Input as the Slot-2 device in the per-game settings

• Automatic Save/Load State Management
  Added an option to configure automatic save/load state management.

  Load state behavior remains restricted when RetroAchievements Hardcore Mode is active.

• Save File Extension Selection
  Added support to choose the save file extension format as .sav or .srm.

• Duplicate Layout / Save As New
  Added the option to duplicate layouts or save them as new while editing a layout.

• Double Tap Layout Position Adjustment Popup
  Added support for double tapping a layout component to open a popup that allows adjusting the X/Y position of buttons.

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Vulkan Fixes & Compatibility:

• Fixed crash on Snapdragon 865
  Resolved a Vulkan-related crash affecting Snapdragon 865 devices.

• AndroidHardwareBuffer Extensions Made Optional
  Vulkan no longer requires AndroidHardwareBuffer extensions unconditionally, improving compatibility across more devices.

• Fallbacks for Timeline Semaphores and Dynamic Indexing
  Added Vulkan fallbacks for:

  • timeline semaphores
  • dynamic indexing

  This improves compatibility for devices that do not fully support the originally expected Vulkan feature set.

• Additional Vulkan Performance Improvements
  More Vulkan-side fixes and adjustments were also made to improve rendering performance and broaden compatibility.

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Upstream Changes @rafaelvcaetano:

• RetroAchievements improvements
• Localization and string updates
• Screenshot pipeline improvements
• Performance and input/device behavior improvements
• ROM launch validation and file handling improvements

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Testing Focus:

This release candidate is mainly focused on validating:

• the new simple Vulkan pipeline performance and stability
• comparison between the simple Vulkan path and the compute Vulkan path
• librashader support and .slangp preset loading on Vulkan
• Vulkan compatibility on a wider range of Android devices
• stability after the Snapdragon 865 crash fix
• Slot-2 analog input behavior with patched ROMs
• automatic save/load state behavior
• save format selection between .sav and .srm
• layout duplication and save-as-new behavior
• double tap X/Y adjustment popup behavior

If you test this build, reports with:

• device model
• GPU / SoC
• game tested
• whether Vulkan works correctly
• whether performance improved or regressed
• whether the simple Vulkan path works correctly
• whether shader preset loading through .slangp works correctly
• whether Slot-2 analog input behaves correctly
• whether the new layout tools behave correctly

would be especially helpful.

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Known Issues Still Planned for RC3:

While RC2 addresses several Vulkan compatibility issues and adds major requested features, a few reported issues are still being tracked for follow-up in RC3:

• Vulkan Internal Resolution / Upscaling Issues
  There are still reported cases where Vulkan does not upscale correctly, especially affecting the top screen presentation path.

• Custom Layout Background Orientation
  In some cases, custom layouts may still show the background image flipped incorrectly.

• RetroAchievements Sync / State Inconsistencies
  Some RetroAchievements-related issues still need follow-up, including cases where achievements appear locked after boot and cases where already unlocked achievements can trigger duplicate unlock or desync-related behavior.

• Simple Vulkan Pipeline Remaining Bugs
  The new simple Vulkan path already provides a major performance improvement, but some remaining bugs are still being worked on to bring it closer to the compute path in overall correctness and behavior.

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RetroAchievements Follow-Up:

After this release candidate, I will open a new discussion thread and start initial follow-up work on some of the currently reported RetroAchievements issues, including:

• login failures that still happen intermittently
• Encore Mode behavior that in some cases appears to stay enabled incorrectly

This will be an initial pass, but it should help organize reports and guide the next fixes.

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Support & Early Access

If you want to support development, early testing, and feature work like Vulkan, RetroAchievements improvements, shader support, and requested platform features, please consider joining Patreon.

Thank you to everyone helping test these release candidates and sending detailed reports.

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This discussion was created from the release melonDS-android v0.7.0.rc2 Major Vulkan Performance Upgrade and support for Retroarch Shaders Presets!.

[HJMBgit84]

Thanks a lot for the work you're doing with Vulcan for NDS games you're the pioneer of Vulcan. On the other hand I want to report an issue with game New Super Mario Bros, it is Mario is invisible while playing, in the cinematic he shows but while playing I am playing with the invisible man, take a look on the attached pictures, I have a Snapdragon 865 GPU Adreno 650. Hope this can be fixed and thanks again :)

[SapphireRhodonite]

Fixed in rc3!

[HJMBgit84]

VID-20260426-WA0003.mp4

Adding a video to explain it better.

[Unknowncat1991]

Redmi 15 5G
Invisible Pokemon during battle in Pokemon Black 2
Vulkan backend
Tried all different settings no luck.

[SapphireRhodonite]

Fixed in rc3

[Unknowncat1991]

[SapphireRhodonite]

This should be fixed in rc3

[Ikuradachi]

Device: Xiaomi 14T
MediaTek Dimensity 8300-Ultra

Issue: Vulkan not working, tested on Pokemon Black/White -> Black Screen and FPS counter 1000+

[SapphireRhodonite]

Can you try the tastest rc3 hotfix2 please?

[Ikuradachi]

its fixed, thanks 🙌

[kirbysuperstar]

Device: Ayn Thor Pro (SD8G2)

Sands of Destruction: Lines of text don't get erased properly, backgrounds end up strange colours, battle combatants and menus are totally missing.

[SapphireRhodonite]

Can you try rc3 hotfix 2 please?

[Ikuradachi]

Device: Xiaomi 14T
MediaTek Dimensity 8300-Ultra

Issue:

• Vulkan not working, tested on Pokemon Black/White -> Black Screen and FPS counter 1000+ ✅ (fixed on rc3)
• Frame drop between 30-60, unstable fps. OpenGL can stable on 58-60 fps.

[SapphireRhodonite]

Hahaha, thanks! I just got to this comment. Thanks! Yup, on some games Vulkan can be a little less performant because it actually forces all games to upscale correctly. I will still be making performance updates to it!