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djipi / Virtual-Jaguar-Rx

Virtual Jaguar, an Atari Jaguar emulator, with integrated debugger
GNU General Public License v3.0
42 stars 5 forks source link

Add Linux Friendly libretro build to this Emulator. #27

Closed Zombie-Ryushu closed 3 years ago

Zombie-Ryushu commented 3 years ago

Add Linux Friendly libretro build to Virtual Jaguar RX. This does not build under any version of Linux I throw at it however new. As such, I am requesting a Libretro section be added to this Emulator, where the current code produces a libretro module for Linux. This should not require a fork of the emulator. merely a change in Make Parameters, as other emulators do this.

djipi commented 3 years ago

Are you able to compile the original Virtual Jaguar on Linux? http://icculus.org/virtualjaguar/

Zombie-Ryushu commented 3 years ago

Yes I can.

Zombie-Ryushu commented 3 years ago

I have built both the SDL/GTK/QT versions of Virtual Jaguar along with the libretro module for a long time. But the some point between vrsion 2.1.0 and 2.1.2, some bug was introduced that caused the emulator to run at around 60% Speed on low power hardware that was never fixed.

I have some aging Intel hardware I use for Emulation. While version 2.1.0 runs at fullspeed, it has graphical and control issues, and no libretro port. the libretro port that exists is based on 2.1.2 so it has the slowdown bug.

libretro should be a build target in the main emulator. It is largely platform Agnostic Between Linux and Windows. It would allow the core emulation to be kept up to date with minimal fuss. Many emulators have an independent make -f Makefile.libretro option.

djipi commented 3 years ago

This has been more or less discussed with #25, #26.

The best for you will be to check the differences in the source codes between v2.1.0 and v2.1.2. Virtual Jaguar Rx is based on Virtual Jaguar v.2.1.3. So your issue is already in Rx.

Adding a Makefile.libretro option won't be enough, it will require to transform the Rx version in a libreto form too. But it won't fix your performance issue.

djipi commented 3 years ago

libreto already exists; the Rx version is dedicated to add debugging capabilities, plus potential improvements. Rx is also supporting only 64 bits (Windows).