README

PPSSPP - a fast and portable PSP emulator
=========================================

Created by Henrik Rydgård

Additional code by many contributors, see the Credits screen

Originally released under the GPL 2.0 (and later) in November 2012

Official website: https://www.ppsspp.org/

Discord: https://discord.gg/5NJB6dD

No BIOS file required to play, PPSSPP is an "HLE" emulator.  Default settings balance good compatibility and speed.

To contribute, see Introduction to development. This page also includes our new AI policy.

Help with testing, investigating, or fixing bugs is always welcome.  See the list of issues.

For the latest source code, see our GitHub page.

For documentation of all kinds (usage, reference, development), see the documentation on the main website

For build instructions and other development tutorials, see the wiki.

To download fresh development builds for Android, Windows and Mac, go to the /devbuilds page

For game compatibility, see community compatibility feedback.

What's new in 1.20.4
--------------------
1.20.4 is an unusually big followup release, but given the new multiplayer developments, we need something to cover the longer gap to 1.21.
During this cycle, I've mostly focused on UX improvements.

- Ad-hoc
  - Support for "data.json" live status from adhoc relay servers ([21496], [21526])
  - RetroAchievements UI improvements around subsets ([21536])
  - Assorted ad-hoc UI improvements ([21530], [21510])
  - Fixes for The Warriors ([21464]) and Street Riders ([21460]) in relay mode

- Texture upscaling
  - Fix old bug causing some textures to get stuck unscales on some hardware when using GPU texture upscaling ([21533])
  - Improved performance of MMPX-adv upscaler ([21555])
  - NNEDI3 and Spline36 GPU texture scaling ([21527])

- Rendering fixes
  - Fix a bug in lens flare occlusion for the Syphon Filter games ([21511])
  - Fix a bug in the software renderer ([21648])
  
- Misc UI improvements
  - Instant type-to-search in game browser ([21559], [21565], [21630])
  - Fix file picker problems on some Android devices (regression) ([21614], [21656])
  - Fix crash in text edit fields on Mac/iOS ([21601])
  - PSP DVD prototypes can now load directly ([21599], [21601])
  - Cheat UI has been cleaned up and supports titles and comments natively ([21590])
  - RetroAchievements subset display improvements ([21536])
  - Basic deep link support on iOS ([21615])
  - Soft keyboard has more symbols ([21625])

- Other
  - Fix important (but mostly rare) crash bug affecting games that draw a lot ([21669])
  - More plugin zip files can now auto-install ([21556])
  - Pause on lost-focus on Linux ([21517])
  - Frameskipping no longer breaks analog stick auto-rotation in GoW, however manual rotation still broken ([21508])
  - Android: Restore "Landscape Auto" ([21482]), the "Auto" screen rotation mode now overrides the user rotation lock ([21507])
  - Contribution by lrzlin: Loongarch improvements ([21499], [21595])
  - Basic suppo