PX8

• Demos
• Download
  • Binaries
• Requirements
• Build
• Resolution
• Coordinate System
• Keyboard Shortcut
• Run a cartridge
• Edit a cartridge
• Display options
• How to create a new cartridge
  • Python
  • Lua
• Cartridge format
• API documentation

PX8 is an Open Source Fantasy Console (128x128 pixels default resolution) in Rust, by using a cartridge that contains the code/gfx/music. The code could be in Python/Lua, or you could create directly everything in pure Rust by using it as a library.

It is still in development, but it is usable and the main features are:

• 128x128 pixels default resolution
• Predefined palettes (pico-8, c64, etc)
• Python 3 / Lua 5.X support for the cartridge without tokens limit
• Desktop/Mobile/Browser (Emscripten) support
• Controls with dpad + 2 buttons (gamecontroller/joystick support)
• Unlimited sprites (8x8)
• Map support (128x32)
• Editor for the sprite and map data
• PX8 format to be able to use your favorite code editor for Python/Lua/Rust
• Mutliple fonts support (pico-8, bbc, cbmII, appleII)
• Change the screen definition dynamically and the aspect ratio
• Screenshot (PNG) / Video recording (GIF)
• Pico-8 compatibility + cartridge (P8/P8.PNG) format support
• Audio support is in progress

It works on all platforms (Linux/OSX/Windows), in the browser (via Emscripten), and on tiny hardware like Raspberry Pi 2/3.

The console is inspired from the awesome Pico-8, so there is a compatibility mode (not 100%, and it is not the goal of the project) available with Pico-8 console and cartridges (P8/PNG).

Demos

The time for each frame is slow (10ms) in the GIF, and doesn't correspond to the speed of the game.

Editor mode:

More advanced examples:

• Advanced Micro Platformer - Starter Kit http://www.lexaloffle.com/bbs/?tid=28793 in Python https://github.com/Gigoteur/PX8/tree/master/games/amp

• 2D Terrain Generation (http://www.lexaloffle.com/bbs/?uid=12213) in Python https://github.com/Gigoteur/PX8/tree/master/games/terrain

• Voxel framework (http://www.lexaloffle.com/bbs/?tid=28308) in Python https://github.com/Gigoteur/PX8/tree/master/examples/voxel

• BR: it is an example from duckduckontheloose (https://github.com/seleb/DuckDuckOnTheLoose) https://github.com/Gigoteur/PX8/tree/master/games/BR

• Flappy bird clone(http://p1xl.com/files/flappy.p8): https://github.com/Gigoteur/PX8/tree/master/games/flappy

More gifs ?

Download

You can get directly the latest version via git:

git clone https://github.com/Gigoteur/PX8.git
cd PX8

Binaries

Or you can get latest binaries for multiples platforms directly on itch.io or here:

• Raspberry Pi 3
• Linux x86_64
• OSX (available)
• Windows (Work in progress)

and old binaries could be obtain for free.

Requirements

You will need multiple things:

• SDL2
• python3
• libreadline

Linux

Packages for Debian/Ubuntu:

• libsdl2-dev
• libreadline-dev
• libpython3-dev

Raspberry Pi

Please enable the GL Driver (7 - Advanced Options -> Ac - GL Driver -> Yes) via:

sudo raspi-config

OSX

Install external dependencies via brew:

• brew install python3
• brew install sdl2
• brew install readline

Right now you need to export the DYLD_FALLBACK_LIBRARY_PATH env variable for the python support, e.g:

• export DYLD_FALLBACK_LIBRARY_PATH=/usr/local/Cellar/python3/3.5.1/Frameworks/Python.framework/Versions/3.5/lib

Build

The first thing to do is to install Rust, so please go to rustup and follow all instructions.

You could build PX8 with cargo directly, in release mode for example, with the support of Python and Lua.

cargo build --features="cpython lua" --release 

Resolution

By default the resolution will 128x128 but you can change the default values by calling the mode API function:

mode(width, height, [aspect_ratio])

Example:

mode(128, 128, 1.0)
mode(512, 128, 4.0)

SDL + Opengl

You can force opengl with SDL via the '-o' option:

./target/release/px8 -o ./games/ski/ski.px8

With Emscripten

You must follow the following guide to install Emscripten. After that you can find some help here.

You can see example of PX8 + Emscripten in the demos repository. You could also see live example from your browser:

• Hello World [Source Code] [Live Demo]
• Hello World 2 [Source Code] [Live Demo]
• Lua Cartridge [Source Code] [Live Demo]
• Cast [Source Code] [Live Demo]

Coordinate system

Each pixel can be access from 0 to 128 (or the new defined width/height) :

Keyboard Shortcut

Player 1:

• cursors, Z,X / C,V / N,M

Player 2:

• ESDF, LSHIFT,A / TAB,Q,E

System shortcut:

• F2: Information debug (FPS, time execution (draw,update), palette name)
• F3: Take a screenshot (png)
• F4: Take a video (gif)
• F5: Save the current cartridge's data (if opened with editor mode)
• F6: Switch between editor/play mode (if opened with editor mode)
• F7: Switch to the next available palette

Run a cartridge

You should be able to run it directly by providing the path of the cartridge:

./target/release/px8 ./games/ski/ski.px8

Demos

You could run the API demos:

./target/release/px8 -s 4 ./examples/api_demos.py 

or some fancy demos:

./target/release/px8 -s 4 ./examples/demos.py
./target/release/px8 -s 4 ./examples/voxel/voxel.px8
./target/release/px8 -s 4 ./examples/pong/pong.px8
./target/release/px8 -s 4 ./games/ski/ski.px8
./target/release/px8 -s 4 ./games/amp/amp.px8
./target/release/px8 -s 4 ./games/terrain/terrain.px8
./target/release/px8 -s 4 ./games/BR/BR.px8

Edit a cartridge

You can edit the GFX in the cartridge by using the specific '-e' option, and alternate between the run mode and the editor with 'F6':

./target/release/px8 -s 4 -e ./games/ski/ski.px8

and you can save the GFX with 'F5'.

Display options

Change the scale

With the '-s' option you can change the size of the console, so you can increase it (2/4/8/10).

You can also use the fullscreen option by using '-f' option.

SDL + OpenGL

You can add the '-o' option to force SDL to use OpenGL

Compatibility mode with PICO8

You could load a PICO8 cartridge file by using the '-m pico8' option to convert the Lua code.

How to create a new cartridge

PX8 will call 3 functions, at startup or during the runtime:

• _init : Called once on startup, mainly to initialize your variables
• _update: Called once per visible frame, mainly to get keyboard input for example
• _draw: Called once per visible frame, mainly to draw things on the screen :)

After that you can use the API to do your game. There is no limitation of what you can do in Python or Lua languages.

By default I don't do any modification in the Python or Lua interpreter, so you are free to create threads, load native files, etc

You will be able to find more technical documentation in the wiki

Python

You can create a classical Python program, all you need is to define the previous functions (_init, _update, _draw), and you can import any packages.

def _init():
  px8_print("INIT")
  
def _update():
  px8_print("UPDATE")
  
def _draw():
  px8_print("DRAW")

Lua

function _init()
  print("INIT")
end

function _update()
  print("UPDATE")
end

function _draw()
  print("DRAW")
end

Cartridge format

Format	Read	Write
P8	✅	✅
P8.PNG	✅	🔴
PX8	✅	✅

API documentation

API	Rust	Python	Lua
camera	✅	✅	✅
circ	✅	✅	✅
circfill	✅	✅	✅
clip	✅	✅	✅
cls	✅	✅	✅
color	✅	✅	✅
ellipse	✅	✅	✅
ellipsefill	✅	✅	✅
fget	✅	✅	✅
fset	✅	✅	✅
font	✅	✅	✅
line	✅	✅	✅
mode	✅	✅	✅
pal	✅	✅	✅
palt	✅	✅	✅
pget	✅	✅	✅
print	✅	✅	✅
pset	✅	✅	✅
noise	✅	✅	✅
noise_set_feed	✅	✅	✅
rect	✅	✅	✅
rectfill	✅	✅	✅
sget	✅	✅	✅
spr	✅	✅	✅
sset	✅	✅	✅
sspr	✅	✅	✅
trigon	✅	✅	✅
trigonfill	🔴	🔴	🔴
btn	✅	✅	✅
btnp	✅	✅	✅
map	✅	✅	✅
mget	✅	✅	✅
mset	✅	✅	✅

More details here about each function with the arguments: API