Initial commit

README.md

@@ -1 +1,17 @@
-# Biqu-Thumbnail-Generator
+This script is not my work, It was shared over ath https://github.com/bigtreetech/BIGTREETECH-TouchScreenFirmware/issues/1238, please read the issue for all relevant information.
+
+The version shared here is my modified version that adds "_btt" to the gcode file name and preserves the original file extension, instead of enforcing a .gcode file extension.
+
+How to use:
+Download and install python 3 (3.9.1 at this moment in time), afterwards, install PyQt5, by going to the command line and issuing `pip install PyQt5`
+
+Next open prusa slicer and add the thumbail generation:
+![Captura de ecrã 2021-01-01 124431](https://user-images.githubusercontent.com/1185683/103439342-fad15d00-4c33-11eb-97ca-65bbb512ba31.png)
+
+
+Finaly go to your Print Settings and in Post processing scripts, add the following [python absolute path] [space] [script absolute path] and if any of the paths contain spaces enclose them in "":
+![Captura de ecrã 2021-01-01 131206](https://user-images.githubusercontent.com/1185683/103439357-176d9500-4c34-11eb-86e9-630646848e63.png)
+
+Then when saving the gcode, it will be processed by the script that will replace it with a version with the correct thumbnails for our TFT
+
+A compiled exe version, using auto-py-to-exe, is also available in the releases.

biqu_convert_new.py

@@ -0,0 +1,165 @@
+#!/usr/local/bin/python3
+import base64
+import io, os, shutil
+import sys, getopt
+try:
+	from PyQt5.QtCore import QSize,Qt
+	from PyQt5.QtCore import QFile, QFileInfo, QIODevice,QTextStream
+	from PyQt5.QtGui import QImage
+except:
+  print ("!!! PyQt5 not installed run pip install PyQt5 !!!")
+  sys.exit()
+
+CODEC = "UTF-8"
+
+def i4b(n):
+    return [n >> 24 & 0xFF,n >> 16 & 0xFF,n >> 8 & 0xFF,n >> 0 & 0xFF]
+
+def i2b(n):
+    return [n >> 8 & 0xFF,n >> 0 & 0xFF]
+
+def overread(msize,gfile):
+    moutdata = ""
+    img = QImage()
+    img.loadFromData(base64topng(readPSTump(gfile),''))
+    img = img.scaled(msize.width(),msize.height(), Qt.IgnoreAspectRatio, Qt.SmoothTransformation)
+    moutdata +=  ";"+(hex(msize.width())[2:]).rjust(4,'0')+(hex(msize.height())[2:]).rjust(4,'0')+"\r\n"
+    pos = QSize(0,0)
+    for ypos in range(0,img.height()):
+     qrgb =";"
+     for xpos in range(0,img.width()):
+       data = img.pixel(xpos,ypos)
+       pos.setWidth(pos.width()+1)
+       dummy = (hex(((data & 0x00F80000) >> 8 ) | ((data & 0x0000FC00) >> 5 ) | ((data & 0x000000F8) >> 3 ))[2:]).rjust(4,'0')
+       if dummy == "0020" or dummy == "0841" or dummy == "0861":
+         dummy = "0000"
+       qrgb = qrgb + dummy
+     pos.setWidth(0)
+     pos.setHeight(pos.height()+1)
+     moutdata = moutdata + qrgb + "\r\n"    
+    return moutdata
+
+
+
+def overseek(gfile):
+        outdatar = ""
+        outdatar = outdatar + overread(QSize(70,70),gfile)
+        outdatar = outdatar + overread(QSize(95,80),gfile)
+        outdatar = outdatar + overread(QSize(95,95),gfile)
+        outdatar = outdatar + overread(QSize(160,140),gfile)
+        return outdatar
+
+def do_convert(gfile):
+       outdata = ""
+       outdata = overseek(gfile)
+       outdata = outdata + "; bigtree thumbnail end\r\n\r\n"
+       fh = QFile(gfile)
+       fh.open(QIODevice.ReadOnly)
+       stream = QTextStream(fh)
+       stream.setCodec(CODEC)
+       lino = 0
+       fg = stream.readAll() + "\r\n"
+       fh.close()
+       bigtree3dfile = os.path.splitext(gfile)[0]+"_btt"+os.path.splitext(gfile)[1]
+       fh = QFile(bigtree3dfile)
+       fh.open(QIODevice.WriteOnly)
+       stream = QTextStream(fh)
+       stream.setCodec(CODEC)
+       stream << outdata
+       stream << fg
+       fh.close()
+       os.remove(gfile)
+
+
+
+## write base64 to png
+def base64topng(stringdata,imagepath): 
+
+  image = base64.b64decode(stringdata)       
+
+  return image
+
+def readPSTump(infile):
+
+  count = 0
+  base64data =''
+  started = 0
+  ended = 0
+  Psfile = open(infile,"r")
+  while True:
+      count =count+1  
+      # Get next line from file 
+      line = Psfile.readline() 
+      if line.find("; thumbnail begin") == 0:      
+         started = 1
+         continue
+
+      if line.find("; thumbnail end") == 0:
+         ended = 1
+
+      if ended == 1:
+        break
+      # if line is empty 
+      # end of file is reached 
+
+      if not line:
+         break
+
+      if started == 0:
+      	continue
+
+      base64data += line[2:]
+  Psfile.close()
+  if base64data == '':
+     print('!!! no thumbnail data found in gcode !!!')
+     sys.exit() 
+  ##with open('base64.txt', 'w') as fh:
+  ##   fh.writelines("%s" % line for line in base64data)
+  return base64data
+
+def readPSGcode(infile):
+  gcodedata =''
+  started = 0
+
+  Psfile = open(infile,"r")
+  while True: 
+     # Get next line from file 
+     line = Psfile.readline() 
+
+     if line.find("; thumbnail end") == 0:
+        started = 1
+        continue
+
+     if started == 0:
+     	continue 
+
+      # if line is empty 
+      # end of file is reached 
+     if not line: 
+        break
+
+     gcodedata += line
+  Psfile.close() 
+  return gcodedata
+
+def main(argv):
+
+   inputfile = ''
+   outputfile = ''
+   try:  
+     inputfile = sys.argv[1]
+   except:
+      print('./biqu_convert inputfile')
+      sys.exit()
+
+   do_convert(inputfile)
+
+
+
+if __name__ == "__main__":
+   main(sys.argv[1:])
+
+
+
+
+