Thumbnail for ChiTu firmware

[fabry-68]

Hello. I would like to have the thumbnail visible not only for prusa and klipper/octoprint, but also for ChiTu (of course, if I choose ChiTu as the firware of the printer). You can use this phyton script as a guide:

!/usr/bin/python3

------------------------------------------------------------------------------

Prusa / Super Slicer post-processor script for printers with chitu boards

URL: https://github.com/mriscoc/ChituBoard

version: 1.1

date: 2021/12/19

author: Miguel Risco-Castillo

#

Contains code from:

github.com/Ultimaker/Cura/blob/b94c6aac5f80485acc24e683805e44db8e00f815/plugins/PostProcessingPlugin/scripts/ChituMods.py

and:

github.com/alexqzd/Marlin/blob/Gcode-preview/Display%20firmware/gcode_thumb_to_jpg.py

------------------------------------------------------------------------------

import sys import re import os import base64 import io import subprocess

try: from PIL import Image except ImportError: subprocess.check_call([sys.executable, "-m", "pip", "install", "Pillow"]) from PIL import Image

def install(package): subprocess.check_call([sys.executable, "-m", "pip", "install", package])

Generates Chitu board thumbnail codes

def generate_image_code(image, startX=0, startY=0, endX=300, endY=300): MAX_PIC_WIDTH_HEIGHT = 320 width, height = image.size if endX > width: endX = width if endY > height: endY = height scale = 1.0 max_edge = endY - startY if max_edge < endX - startX: max_edge = endX - startX if max_edge > MAX_PIC_WIDTH_HEIGHT: scale = MAX_PIC_WIDTH_HEIGHT / max_edge if scale != 1.0: width = int(width scale) height = int(height scale) startX = int(startX scale) startY = int(startY scale) endX = int(endX scale) endY = int(endY scale) image = image.scaled(width, height) rgb_im = image.convert('RGB') res_list = [] print('StartY:', startY, ' endY:', endY) for i in range(startY, endY): for j in range(startX, endX): res_list.append(rgb_im.getpixel((j, i))) index_pixel = 0 pixel_num = 0 pixel_data = '' pixel_list = [] pixel_list.append('M4010 X%d Y%d' % (endX - startX, endY - startY)) last_color = -1 mask = 32 unmask = ~mask same_pixel = 1 color = 0 for j in res_list: r, g, b = j color = (r >> 3 << 11 | g >> 2 << 5 | b >> 3) & unmask if last_color == -1: last_color = color elif last_color == color and same_pixel < 4095: same_pixel += 1 elif same_pixel >= 2: pixel_data += '%04x' % (last_color | mask) pixel_data += '%04x' % (12288 | same_pixel) pixel_num += same_pixel last_color = color same_pixel = 1 else: pixel_data += '%04x' % last_color last_color = color pixel_num += 1 if len(pixel_data) >= 180: pixel_list.append("M4010 I%d T%d '%s'" % (index_pixel, pixel_num, pixel_data)) pixel_data = '' index_pixel += pixel_num pixel_num = 0

if same_pixel >= 2:
    pixel_data += '%04x' % (last_color | mask)
    pixel_data += '%04x' % (12288 | same_pixel)
    pixel_num += same_pixel
    last_color = color
    same_pixel = 1
else:
    pixel_data += '%04x' % last_color
    last_color = color
    pixel_num += 1
pixel_list.append("M4010 I%d T%d '%s'" % (index_pixel, pixel_num, pixel_data))
return pixel_list

Get the g-code source file name

sourceFile = sys.argv[1]

Read the ENTIRE g-code file into memory

with open(sourceFile, "r") as f: lines = f.read()

thumb_expresion = '; thumbnail begin.?\n((.|\n)?); thumbnail end' size_expresion = '; thumbnail begin [0-9]+x[0-9]+ [0-9]+' size_expresion_group = '; thumbnail begin [0-9]+x[0-9]+ ([0-9]+)'

thumb_matches = re.findall(thumb_expresion, lines) size_matches = re.findall(size_expresion, lines)

def encodedStringToGcodeComment(encodedString): n = 78 return '; ' + '\n; '.join(encodedString[i:i+n] for i in range(0, len(encodedString), n)) + '\n'

for idx, match in enumerate(thumb_matches): original = match[0] encoded = original.replace("; ", "") encoded = encoded.replace("\n", "") encoded = encoded.replace("\r", "") decoded = base64.b64decode(encoded) img_png = Image.open(io.BytesIO(decoded)) img_png_rgb = img_png.convert('RGB') img_byte_arr = io.BytesIO() img_png_rgb.save(img_byte_arr, format='jpeg') img_byte_arr = img_byte_arr.getvalue() encodedjpg = base64.b64encode(img_byte_arr).decode("utf-8") encodedjpg_gcode = encodedStringToGcodeComment(encodedjpg) lines = lines.replace(original, encodedjpg_gcode)

size_match = size_matches[idx]
size = re.findall(size_expresion_group, size_match)
new_size = size_match.replace(size[0], str(len(encodedjpg)))
lines = lines.replace(size_match, new_size)

Prepare header values

ph = re.search('; generated by (.*)\n', lines)[0] lines = lines.replace(ph, "")

match = re.search('; estimated printing time (normal mode) = (.)\n', lines)[1] h = re.search('(\d+)h',match) h = int(h[1]) if h is not None else 0 m = re.search('(\d+)m',match) m = int(m[1]) if m is not None else 0 s = re.search('(\d+)s',match) s = int(s[1]) if s is not None else 0 time = h3600+m*60+s

match = re.search('; filament used [mm] = (.*)\n', lines) filament = float(match[1])/1000 if match is not None else 0

match = os.getenv('SLIC3R_LAYER_HEIGHT') layer = float(match) if match is not None else 0

minx = 0 miny = 0 minz = 0 maxx = 0 maxy = 0 maxz = 0

with open(sourceFile, "w") as of:

Chitu thumbnail

for element in generate_image_code(img_png):
  of.write(element + "\n")
of.write("\n")

Write header values

of.write(';FLAVOR:Marlin\n')
of.write('M2100 T{:d}\n'.format(time))
of.write(';TIME:{:d}\n'.format(time))
of.write(';Filament used: {:.6f}\n'.format(filament))
of.write(';Layer height: {:.2f}\n'.format(layer))
of.write(';MINX:{:.3f}\n'.format(minx))
of.write(';MINY:{:.3f}\n'.format(miny))
of.write(';MINZ:{:.3f}\n'.format(minz))
of.write(';MAXX:{:.3f}\n'.format(maxx))
of.write(';MAXY:{:.3f}\n'.format(maxy))
of.write(';MAXZ:{:.3f}\n'.format(maxz))
of.write(';POSTPROCESSED\n')
of.write(ph)
of.write(lines)

of.close() f.close()

[PedroC1999]

Hello, SuperSlicer supports a post processing script function (Print Settings -> Output Options -> Post-processing script) you can use for now, whilst this does/does not get natively implemented.

[fabry-68]

Yes, I know... this is how works the script I have copied. But having a lot of computers (mac/windows) it will be nice to have it native in SuperSlicer