265 lines
9.3 KiB
Python
265 lines
9.3 KiB
Python
import io # To check if we are on a Raspberry Pi
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import subprocess
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import os
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from time import sleep, gmtime, strftime
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from flask_socketio import SocketIO
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from gpiozero import Button, LED, DigitalOutputDevice
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from PIL import Image
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class Raspberry():
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"""
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This class will manage three things :
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- Connecting to a USB webcam
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- Managing a push button
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- Activating a flash ( or light )
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- Flash an indicator light
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"""
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def __init__(
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self,
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printer,
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app,
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socketio,
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button_gpio_port_number,
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indicator_gpio_port_number,
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flash_gpio_port_number,
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is_flash_present,
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):
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self.printer = printer
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self.socketio = socketio
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self.app = app
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self.flash_gpio = flash_gpio_port_number
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self.is_flash_present = is_flash_present
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self.button_gpio = button_gpio_port_number
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self.led_gpio = indicator_gpio_port_number
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self.image_path = self.app.config["UPLOAD_FOLDER"] + "/image.jpg"
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def is_raspberry_pi(self, raise_on_errors=False):
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# Check if we are running on a raspberry pi
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try:
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with io.open("/proc/cpuinfo", "r") as cpuinfo:
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found = False
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for line in cpuinfo:
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if line.startswith("Hardware"):
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found = True
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label, value = line.strip().split(":", 1)
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value = value.strip()
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if value not in (
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"BCM2708",
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"BCM2709",
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"BCM2711",
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"BCM2835",
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"BCM2836",
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):
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self.app.logger.debug(
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"This system does not appear to be a Raspberry Pi."
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)
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return False
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if not found:
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self.app.logger.error(
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"Couldn't get sufficient hardware information from /proc/cpuinfo, Unable to determine if we are on a Raspberry Pi."
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)
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return False
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except IOError:
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self.app.logger.error("Unable to open `/proc/cpuinfo`.")
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return False
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self.app.logger.debug("It seems we are on a Raspberry Pi")
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try:
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self.initialise_gpio()
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except Exception as e:
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self.app.logger.debug("Could not init GPIO : " + str(e))
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raise e
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return True
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def initialise_gpio(self):
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self.app.logger.debug("Initializing GPIO")
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self.led = LED(self.led_gpio)
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self.app.logger.debug("Activated indicator LED")
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self.indicator_countdown(iters=3)
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self.button = Button(self.button_gpio, pull_up=True, bounce_time=0.1)
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self.button.when_pressed = self.on_button_pressed
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self.app.logger.debug("Activated button")
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# The "flash" is a relay-controlled device ( light bulb for example )
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self.flash = DigitalOutputDevice(self.flash_gpio)
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self.flash_toggle()
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self.app.logger.debug("Activated flash")
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def indicator_countdown(self, iters=10, multi=10):
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for i in range(iters, 0, -1):
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self.led.on()
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sleep(i / multi)
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self.led.off()
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sleep(i / multi)
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def indicator_led(self, timing=0.2, l=5):
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for i in range(l):
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self.app.logger.debug("LED turned on")
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self.led.on()
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sleep(timing)
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self.led.off()
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self.app.logger.debug("LED turned off")
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sleep(timing)
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def flash_toggle(self):
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self.app.logger.debug("Flash turned on")
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self.flash.on()
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sleep(0.3)
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self.flash.off()
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self.app.logger.debug("Flash turned off")
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def take_picture(self):
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# Validate if the image path is valid
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if not os.path.isdir(os.path.dirname(self.image_path)):
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self.app.logger.error(
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f"Invalid directory for image path: {self.image_path}"
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)
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return False
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try:
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result = subprocess.run(
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["fswebcam", "--no-banner", "-r", "1920x1080", self.image_path],
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check=True, # Will raise CalledProcessError if the command fails
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stdout=subprocess.PIPE, # Capture standard output
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stderr=subprocess.PIPE, # Capture error output
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)
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# Optionally log the command output
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self.app.logger.debug(
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f"Image captured successfully: {result.stdout.decode()}"
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)
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except subprocess.CalledProcessError as e:
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# Log error output if available
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self.app.logger.error(
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f"Unable to take a picture. Error: {e.stderr.decode()}"
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)
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return False
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except Exception as e:
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# Catch any unexpected errors
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self.app.logger.error(f"Unexpected error while taking picture: {str(e)}")
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return False
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# # Overlay logo
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# logo_path = 'src/static/images/requin.png' # Update path as needed
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# if not self.overlay_logo(self.image_path, logo_path):
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# self.app.logger.warning("Picture taken but failed to overlay logo.")
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return True
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def overlay_logo(
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self,
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image_path,
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logo_path,
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output_path=None,
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position="bottom_right",
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margin=10,
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):
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try:
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image = Image.open(image_path).convert("RGBA")
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logo = Image.open(logo_path).convert("RGBA")
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# Resize logo if it's too big (logo will be 30% the width of the image)
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logo_ratio = (
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0.30 # You can change the ratio if you want the logo bigger or smaller
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)
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logo_width = int(image.width * logo_ratio)
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logo_height = int(logo.height * (logo_width / logo.width))
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logo = logo.resize((logo_width, logo_height), Image.Resampling.LANCZOS)
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# Calculate position based on the chosen location
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if position == "bottom_right":
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x = image.width - logo.width - margin
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y = image.height - logo.height - margin
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elif position == "top_left":
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x, y = margin, margin
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elif position == "top_right":
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x = image.width - logo.width - margin
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y = margin
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elif position == "bottom_left":
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x = margin
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y = image.height - logo.height - margin
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else:
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raise ValueError(
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"Invalid position. Choose from 'bottom_right', 'top_left', 'top_right', or 'bottom_left'."
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)
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# Composite the logo onto the image
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image.paste(logo, (x, y), logo) # Use logo as its own alpha mask
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# Save the result
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if not output_path:
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output_path = image_path # Overwrite the original image if no output path is given
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image.save(output_path)
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except Exception as e:
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self.app.logger.error(f"Error overlaying logo: {e}")
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return False
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return True
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def crop_to_square(self, image_path, output_path=None):
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try:
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image = Image.open(image_path)
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width, height = image.size
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# Determine shorter side
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new_edge = min(width, height)
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# Calculate cropping box (centered)
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left = (width - new_edge) // 2
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top = (height - new_edge) // 2
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right = left + new_edge
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bottom = top + new_edge
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image = image.crop((left, top, right, bottom))
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if not output_path:
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output_path = image_path # Overwrite original
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image.save(output_path)
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except Exception as e:
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self.app.logger.error(f"Error cropping image to square: {e}")
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return False
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return True
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def on_button_pressed(self):
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self.app.logger.debug("Button has been pressed")
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self.led.on()
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self.app.logger.debug("Counting down")
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self.indicator_countdown(
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iters=4, multi=20
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) # The indicator will flash a countdown LED
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self.app.logger.debug("Taking picture")
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try:
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self.flash.on()
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self.take_picture()
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except Exception as e:
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self.app.logger.error(
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"Could not take a picture after the button press : " + str(e)
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)
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finally:
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self.flash.off()
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self.app.logger.debug("Printing picture")
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self.led.on()
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self.crop_to_square(self.image_path)
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self.printer.print_img("src/static/images/extase-club.png", process=True)
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self.printer.print_img(self.image_path, process=True)
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self.printer.print_sms("")
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self.printer.print_sms("With Love From Société.Vide", signature="", bold=True)
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self.printer.print_sms("Printed by LittlePrynter", signature="")
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self.printer.print_sms("n07070.xyz", signature="")
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self.printer.print_sms(strftime("%Y-%m-%d %H:%M", gmtime()), signature="")
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self.printer.qr("https://n07070.xyz/articles/littleprynter")
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self.printer.cut()
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self.led.off()
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self.app.logger.debug("Done printing picture")
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return True
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