56 lines
2.4 KiB
Python
56 lines
2.4 KiB
Python
#!/usr/bin/python3
|
|
"""
|
|
Mirror a scaled copy of the framebuffer to a matrix
|
|
|
|
A portion of the framebuffer is displayed until the user hits ctrl-c.
|
|
|
|
The `/dev/fb0` special file will exist if a monitor is plugged in at boot time,
|
|
or if `/boot/firmware/cmdline.txt` specifies a resolution such as
|
|
`... video=HDMI-A-1:640x480M@60D`.
|
|
|
|
For help with commandline arguments, run `python fbmirror.py --help`
|
|
"""
|
|
|
|
|
|
import click
|
|
import numpy as np
|
|
|
|
import adafruit_blinka_raspberry_pi5_piomatter as piomatter
|
|
import adafruit_blinka_raspberry_pi5_piomatter.click as piomatter_click
|
|
from adafruit_blinka_raspberry_pi5_piomatter.pixelmappers import simple_multilane_mapper
|
|
|
|
with open("/sys/class/graphics/fb0/virtual_size") as f:
|
|
screenx, screeny = [int(word) for word in f.read().split(",")]
|
|
|
|
with open("/sys/class/graphics/fb0/bits_per_pixel") as f:
|
|
bits_per_pixel = int(f.read())
|
|
|
|
assert bits_per_pixel == 16
|
|
|
|
bytes_per_pixel = bits_per_pixel // 8
|
|
dtype = {2: np.uint16, 4: np.uint32}[bytes_per_pixel]
|
|
|
|
with open("/sys/class/graphics/fb0/stride") as f:
|
|
stride = int(f.read())
|
|
|
|
linux_framebuffer = np.memmap('/dev/fb0',mode='r', shape=(screeny, stride // bytes_per_pixel), dtype=dtype)
|
|
|
|
@click.command
|
|
@click.option("--x-offset", "xoffset", type=int, help="The x offset of top left corner of the region to mirror", default=0)
|
|
@click.option("--y-offset", "yoffset", type=int, help="The y offset of top left corner of the region to mirror", default=0)
|
|
@piomatter_click.standard_options
|
|
def main(xoffset, yoffset, width, height, serpentine, rotation, pinout, n_planes, n_temporal_planes, n_addr_lines, n_lanes):
|
|
if n_lanes != 2:
|
|
pixelmap = simple_multilane_mapper(width, height, n_addr_lines, n_lanes)
|
|
geometry = piomatter.Geometry(width=width, height=height, n_planes=n_planes, n_addr_lines=n_addr_lines, n_temporal_planes=n_temporal_planes, n_lanes=n_lanes, map=pixelmap)
|
|
else:
|
|
geometry = piomatter.Geometry(width=width, height=height, n_planes=n_planes, n_addr_lines=n_addr_lines, n_temporal_planes=n_temporal_planes, rotation=rotation, serpentine=serpentine)
|
|
framebuffer = np.zeros(shape=(geometry.height, geometry.width), dtype=dtype)
|
|
matrix = piomatter.PioMatter(colorspace=piomatter.Colorspace.RGB565, pinout=pinout, framebuffer=framebuffer, geometry=geometry)
|
|
|
|
while True:
|
|
framebuffer[:,:] = linux_framebuffer[yoffset:yoffset+height, xoffset:xoffset+width]
|
|
matrix.show()
|
|
|
|
if __name__ == '__main__':
|
|
main()
|