65 lines
3 KiB
Python
65 lines
3 KiB
Python
#!/usr/bin/python3
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"""
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Display a (possibly scaled) X session to a matrix
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The display runs until the graphical program exits.
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The display doesn't get a keyboard or mouse, so you have to use a program that
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will get its input in some other way, such as from a gamepad.
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For help with commandline arguments, run `python virtualdisplay.py --help`
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This needs additional software to be installed (besides a graphical program to run). At a minimum you have to
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install a virtual display server program (xvfb) and the pyvirtualdisplay importable Python module:
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$ sudo apt install -y xvfb
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$ pip install pyvirtualdisplay
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Here's an example for running an emulator using a rom stored in "/tmp/snesrom.smc" on a virtual 128x128 panel made from 4 64x64 panels:
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$ python virtualdisplay.py --pinout AdafruitMatrixHatBGR --scale 2 --backend xvfb --width 128 --height 128 --serpentine --num-address-lines 5 --num-planes 4 -- mednafen -snes.xscalefs 1 -snes.yscalefs 1 -snes.xres 128 -video.fs 1 -video.driver softfb /tmp/snesrom.smc
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"""
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# To run a nice emulator:
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import shlex
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from subprocess import Popen
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import click
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import numpy as np
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from pyvirtualdisplay.smartdisplay import SmartDisplay
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import adafruit_blinka_raspberry_pi5_piomatter as piomatter
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import adafruit_blinka_raspberry_pi5_piomatter.click as piomatter_click
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@click.command
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@click.option("--scale", type=float, help="The scale factor, larger numbers mean more virtual pixels", default=1)
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@click.option("--backend", help="The pyvirtualdisplay backend to use", default="xvfb")
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@click.option("--extra-args", help="Extra arguments to pass to the backend server", default="")
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@click.option("--rfbport", help="The port number for the --backend xvnc", default=None, type=int)
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@click.option("--use-xauth/--no-use-xauth", help="If a Xauthority file should be created", default=False)
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@piomatter_click.standard_options
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@click.argument("command", nargs=-1)
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def main(scale, backend, use_xauth, extra_args, rfbport, width, height, serpentine, rotation, pinout, n_planes, n_addr_lines, command):
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kwargs = {}
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if backend == "xvnc":
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kwargs['rfbport'] = rfbport
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if extra_args:
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kwargs['extra_args'] = shlex.split(extra_args)
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print("xauth", use_xauth)
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geometry = piomatter.Geometry(width=width, height=height, n_planes=n_planes, n_addr_lines=n_addr_lines, rotation=rotation)
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framebuffer = np.zeros(shape=(geometry.height, geometry.width, 3), dtype=np.uint8)
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matrix = piomatter.PioMatter(colorspace=piomatter.Colorspace.RGB888Packed, pinout=pinout, framebuffer=framebuffer, geometry=geometry)
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with SmartDisplay(backend=backend, use_xauth=use_xauth, size=(round(width*scale),round(height*scale)), manage_global_env=False, **kwargs) as disp, Popen(command, env=disp.env()) as proc:
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while proc.poll() is None:
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img = disp.grab(autocrop=False)
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if img is None:
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continue
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img = img.resize((width, height))
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framebuffer[:, :] = np.array(img)
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matrix.show()
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if __name__ == '__main__':
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main()
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