Hardware accelerated games/programs using Khronos

There’s a test version of the DarkPlaces Quake 1 engine available here. It’s an enhanced version of the original Quake 1 engine.
See here for more information.

You’ll need to source your own PAK files. The freely available shareware version is available from here. First create an ‘id1’ folder in the !DarkPlaces folder and drop the ‘PAK0.PAK’ into this.

It is only compatible with the Raspberry Pi due to using the GPU for hardware accleration. It’s been tested on a RPi zero (averages 20fps for the ‘demo1’ benchmark @1920x1080) and RPi 3 (averages 53 fps).
It runs full screen only as RISC OS has no knowledge of Open GL surfaces. I believe hardware overlay support is needed in RISC OS for use in the desktop.

It uses hardware accelerated graphics so you’ll also need khronos.
Just merge the !Boot and !System folders. It contains the Khronos module and the neccessary shared libraries.
The SDL2 libraries use the OpenGLES back end. Currently Khronos supports OpenVG and OpenGLES 1 and 2.

It’s only been tested with the shareware PAK file. See the !Help file for use with other mods.
Muliplayer is also untested.

There are a few issues to be aware of.
VSync doesn’t work so you may experience flickering/tearing.
Pressing multiple keys together causes the key press to be ignored. Let go of one of the other keys first.
The ‘Escape’ key always exits the program even if it’s bound to another action.

To toggle the menu press ‘F7’. The settings are saved in !Boot.Choices.darkplaces.
‘gpu_mem’ in ‘config.txt’ needs to set to at least 128. (gpu_mem=128)
It’s recommended to use the latest Raspberry Pi firmware and RISC OS rom.

Look out for further games/programs on Raspberry Pi on RISC OS using Khronos.

Well done! Quake now runs faster – and at a higher resolution – under RISC OS on a Pi 1 than it does under DOSBox on a 3.3 GHz Intel i5.

Wow HW acceleration on the Risc OS on the RPi. Nice.

And quake to boot, can it get any better?

quake 3

Is this available somewhere or are you just seeing what you want to see instead of what the thread actually says? :)

Is this available somewhere or are you just seeing what you want to see instead of what the thread actually says? :)

Neither. There has been so much talk about Quake 3 in the RPi related forums over the years that my fingers got accustomed to following the word Quake with the number 3.

So consider it a typo, I guess.

Where could I find the SDL devel libraries for the accelerated version for RISC OS?

Would quite like to give that a go.

What the..? This is INCREDIBLE!! SDL2 using the GLES renderer on Risc OS on the Pi!
The potential of this is huge: Current ScummVM, RetroArch/LibRetro (thinking about all these cores working on Risc OS makes my head explode), and a loooong etc.
Is vsync doable? It will be needed for RetroArch/LibRetro at least as audio/video sync relies heavily on proper vsync.

Some progress to report.

RetroArch is now working. There are about 30 cores running. Some run too slowly to be useful. (PS One, 3do, Atari Jaguar and Sega Saturn).
Others need at least a RPI 3 to run fast enough. It’s quite tricky configuring the correct the keyboard controls. There’s no Joystick support on RISC OS. Also pressing multiple keys together has problems. VSync is not working so there is noticable screen tearing.

If anyone would like to try it and possibly help with the keyboard configuration I can make a version available for download.

Quake 3 is working to a degree. On a RPI3 the directional controls stop responding after a few seconds. Seems OK on a RPi 2. A bit juddery at 1080p but OK at lower resolutions.

Also Neverputt and Neverball. (Quake 3, Neverputt and Neverball ported by Lee Noar).

They all run in full screen only in the current RISC OS resolution. If using the latest RISC OS rom that allows native screen mode changes it’s much easier to change resolution if it runs too slow.

It’s also possible to develop native applications on RISC OS using GCC that use Khronos with SDL2 and GLES. I’ll upload an example (spinning triangle) makefile and source. Plus all the necessary libraries.

Sounds great – nice work!

Neverball/Neverputt are available to download from here. By default Neverball is run. Change the !Run file to run neverputt instead.
Also download the updated khronos.zip. Just merge !Boot and !System.

Ive managed to get Darkplaces to run as I can here it but I cannot see any image.
Any ideas what this might be ?

I think there’s a GLES build option or something for Minetest, So I guess that could conceivably be ported maybe?

@Chris Gransden: I have a huge interest on some of the things this could bring!
Any hope for vsync working? RetroArch needs it badly I think…
What about current ScummVM (which runs on Raspbian runs on SDL2 which in turn uses GLES2 to render)?

Yesterday I tried to run !Neverball on my RPI B (version 1). I downloaded the zip files from 14th december as linked here above. After merging the !Boot and !System files I started !Neverball. The only thing I saw was a grey screen with a pointer pressing escape terminated the program. I must say I was not very patient and pressed the key after about 10 seconds.

This was with:
RPI B version 1
screen 1920 × 1080
The latest rom (build june 10th).

Should it still work or has it stopped working with all the rom changes since 14th december?