n07070/littleprynter
1
0
Fork 0
Code Issues 4 Pull Requests 1 Projects Releases Activity

Update code to better handle the raspberry pi mode

Browse Source
This commit is contained in:
nono
2025-10-17 17:33:53 +02:00
parent 34bffe93af
commit 670ab495d8
3 changed files with 191 additions and 60 deletions
Download Patch File Download Diff File Expand all files Collapse all files

105
src/printer.py
View File

@@ -98,46 +98,37 @@ class Printer(object):
return True
def print_sms(self, msg, signature="Guest") -> None:
clean_msg = str(msg)
def print_sms(self, msg, signature="",bold=False):
clean_msg = str(msg) + "\n"
clean_signature = str(signature)
if len(clean_msg) > 4096 or len(clean_msg) < 3 :
if len(clean_msg) > 4096:
self.app.logger.warning("Could not print message of this length: " + str(len(clean_msg)))
raise Exception("Could not print message of this length :" + str(len(clean_msg)) + ", needs to between 3 and 4096 caracters long.")
raise Exception("Could not print message of this length :" + str(len(clean_msg)) + ", needs to be below 4096 caracters long.")
if len(signature) > 256 or len(signature) < 1:
if len(signature) > 256:
self.app.logger.warning("Could not print signature of this length: " + str(len(clean_signature)))
raise Exception("Could not print signature of this length :" + str(len(clean_signature)) + ", needs to between 3 and 256 caracters long.")
self.check_paper()
raise Exception("Could not print signature of this length :" + str(len(clean_signature)) + ", needs to be below 256 caracters long.")
try:
self.printer.open(self.usb_args);
self.printer.set(align='left', font='a', bold=False, underline=0, width=1, height=1, density=8, invert=False, smooth=True, flip=False, double_width=False, double_height=False, custom_size=False)
self.printer.set(align='left', font='a', bold=True, underline=1, width=1, height=1, density=6, invert=False, smooth=True, flip=False, double_width=False, double_height=False, custom_size=False)
self.printer.textln(clean_msg)
self.printer.textln("")
self.printer.set(align='left', font='b', bold=False, underline=1, width=1, height=1, density=9, invert=False, smooth=True, flip=False, double_width=False, double_height=False, custom_size=False)
self.printer.textln("> " + clean_signature + " @ " + strftime("%Y-%m-%d %H:%M:%S", gmtime()))
self.printer.textln("")
self.printer.textln("Printed by LittlePrinter ")
self.printer.textln("n07070.xyz/articles/littleprynter")
self.printer.textln("")
self.printer.cut()
self.printer.set(align='center', font='a', bold=bold)
self.printer.textln(clean_msg )
if clean_signature:
self.printer.textln(clean_signature )
self.printer.close()
except Exception as e:
self.app.logger.error("Unable to print because : " + str(e))
raise e
self.app.logger.info("Printed text")
return True
def print_img(self, path, sign) -> None:
def print_img(self, path, sign="",center=True,process=False):
clean_signature = str(sign)
if len(sign) > 256 or len(sign) < 1:
if len(sign) > 256:
self.app.logger.warning("Could not print signature of this length: " + str(len(clean_signature)))
raise Exception("Could not print signature of this length :" + str(len(clean_signature)) + ", needs to between 3 and 256 caracters long.")
raise Exception("Could not print signature of this length :" + str(len(clean_signature)) + ", needs to be below 256 caracters long.")
if not os.path.isfile(str(path)):
self.app.logger.warning("File does not exist : " + str(path))
@@ -145,31 +136,61 @@ class Printer(object):
else:
self.app.logger.debug("Printing file from " + str(path))
try:
self.app.logger.debug("Proccessing the image")
path = process_image(self, path)
except Exception as e:
self.app.logger.error(str(e))
raise e
if process:
try:
self.app.logger.debug("Proccessing the image")
path = process_image(self, path)
except Exception as e:
self.app.logger.error(str(e))
return False
else:
self.app.logger.warning("Not proccessing the image")
try:
self.check_paper()
self.printer.open(self.usb_args)
self.printer.image(path)
self.printer.textln("Printed by LittlePrynter ")
self.printer.textln("n07070.xyz/articles/littleprynter")
self.printer.textln(clean_signature + " @ " + strftime("%Y-%m-%d %H:%M:%S", gmtime()))
self.printer.cut()
self.printer.image(path,center=center)
self.printer.close()
self.app.logger.debug("Printed an image : " + str(path))
os.remove(path)
self.app.logger.debug("Removed image.")
self.app.logger.debug("Removed image : " + str(path))
except Exception as e:
self.printer.close()
self.app.logger.error(str(e))
return False
self.app.logger.info("Printed a picture")
return True
def qr(self, content):
try:
self.printer.open(self.usb_args)
self.printer.qr(content, center=True)
self.printer.close()
except Exception as e:
self.printer.close()
self.app.logger.error(str(e))
return False
self.app.logger.info("Printed a QR")
return True
def cut(self):
try:
self.printer.open(self.usb_args)
self.printer.cut()
self.printer.close()
except Exception as e:
self.printer.close()
self.app.logger.error(str(e))
raise e
self.app.logger.info("Did a cut")
return True
def process_image(self, path):
brightness_factor = 1.5 # Used only if image is too dark
brightness_threshold = 100 # Brightness threshold (0–255)
@@ -187,9 +208,9 @@ def process_image(self, path):
original_img.thumbnail((max_width, max_height), Image.LANCZOS)
self.app.logger.debug("Resized the image")
# Convert to grayscale for dithering
dithered_img = original_img.convert("L").convert("1") # Dithering using default method (Floyd–Steinberg)
self.app.logger.debug("Dithered the image")
# # Convert to grayscale for dithering
# dithered_img = original_img.convert("L").convert("1") # Dithering using default method (Floyd–Steinberg)
# self.app.logger.debug("Dithered the image")
# Compute brightness of original image (grayscale average)
grayscale = original_img.convert("L")
@@ -204,9 +225,9 @@ def process_image(self, path):
enhancer = ImageEnhance.Brightness(original_img)
original_img = enhancer.enhance(brightness_factor)
# Reduce contrast
contrast_enhancer = ImageEnhance.Contrast(original_img)
original_img = contrast_enhancer.enhance(contrast_factor)
# # Reduce contrast
# contrast_enhancer = ImageEnhance.Contrast(original_img)
# original_img = contrast_enhancer.enhance(contrast_factor)
# Final resize check
if original_img.height > max_height: