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297 lines
10 KiB
297 lines
10 KiB
from tkinter import Tk, Label, filedialog, Button
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from PIL import Image, ImageTk
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from svgpathtools import svg2paths, Line, QuadraticBezier, CubicBezier
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import cairo, subprocess, bezier, os, math, time
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import numpy as np
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class GCoder(Tk):
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def __init__(self):
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super().__init__()
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# Setup the file structure
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if not os.path.exists("output"):
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os.makedirs("output")
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# Height at which the pen touches and draws on the surface
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self.touch_height = 20
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# How far to raise the pen tip to raise it off the page
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self.raise_height = 2
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# The inherent offset from true 0 we have from the pen bracket
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self.head_x_offset = 50
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# XY movement speed
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self.speed = 500
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# Weather we render lift markers
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self.lift_markers = True
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# X and Y offsets to place the image on A11 paper
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self.offset_x = 75 + self.head_x_offset
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self.offset_y = 20
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# Bed dimensions to fit A11 paper
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self.bed_max_x = 280
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self.bed_min_x = self.offset_x
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self.bed_max_y = 280
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self.bed_min_y = 20
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self.started = False
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self.gcode_preamble = '''
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G91 ; Set to relative mode for the initial pen lift
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G1 Z20 ; Lift head by 20
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G90 ; Set back to absolute position mode
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M107 ; Fan off
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M190 S0 ; Set bed temp
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M104 S0 ; Set nozzle temp
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G28 ; home all axes
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G0 F{1} ; Set the feed rate
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G1 Z{0} ; Move the pen to just above the paper
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'''.format(self.touch_height + self.raise_height, self.speed)
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self.gcode_end = '''
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G1 Z{0} F7000 ; Raise the pen high up so we can fit a cap onto it
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M104 S0 ; Set the nozzle to 0
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G28 X0 Y0 ; Home back to (0,0) for (x,y)
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M84 ; Turn off the motors
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'''.format(75)
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w, h = 300, 300
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self.geometry("{}x{}".format(w, h))
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self.surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, 300, 300)
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self.context = cairo.Context(self.surface)
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self.context.scale(1, 1)
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self.context.set_line_width(0.4)
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self.button = Button(self, text="Select Image", command=self.file_select_callback)
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self.button.pack()
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self.mainloop()
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def file_select_callback(self):
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filepath = filedialog.askopenfilename(initialdir=".", title="Select file",
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filetypes=(("jpeg files", "*.jpg"), ("all files", "*.*")))
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if len(filepath) is 0:
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return
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self.context.rectangle(0, 0, 300, 300)
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self.context.set_source_rgba(1, 1, 1, 1.0)
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self.context.fill()
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self.context.set_source_rgba(0, 0, 0, 1.0)
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filename = os.path.basename(filepath)
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self.convert_image(filename)
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self.convert_gcode()
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self.render_gcode()
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self._image_ref = ImageTk.PhotoImage(
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Image.frombuffer("RGBA", (300, 300), self.surface.get_data().tobytes(), "raw", "BGRA", 0, 1))
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self.label = Label(self, image=self._image_ref)
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self.label.pack(expand=True, fill="both")
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def convert_image(self, file_name):
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base_name = file_name.split(".")[0]
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print("Converting input file [{}]".format(file_name))
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print("Running mogrify...")
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start = time.time()
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subprocess.call(["mogrify", "-format", "bmp", "input-images/{}".format(file_name)])
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print("Run took [{:.2f}] seconds".format(time.time() - start))
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print("Running mkbitmap...")
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start = time.time()
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subprocess.call(["mkbitmap", "input-images/{}.bmp".format(base_name), "-x",
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"-f", "15",
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# "-b", "0",
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"-o", "input-images/{}-n.bmp".format(base_name)
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])
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print("Run took [{:.2f}] seconds".format(time.time() - start))
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print("Running potrace...")
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start = time.time()
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subprocess.call(["potrace",
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"-t", "20",
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"-z", "white",
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"-b", "svg",
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"input-images/{}-n.bmp".format(base_name),
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"--rotate", "0",
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"-o", "tmp/conversion-output.svg",
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])
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print("Run took [{:.2f}] seconds\n".format(time.time() - start))
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def render_gcode(self):
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file = open("output/gcode-output.gcode", "r")
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largest_x = 0
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largest_y = 0
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smallest_x = 300
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smallest_y = 300
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x = None
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y = None
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for line in file:
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split = line.split(" ")
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command = split[0]
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operands = split[1:]
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prev_x = x
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prev_y = y
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if command == "G1":
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for operand in operands:
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if operand.startswith("X"):
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x = float(operand[1:])
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if x > largest_x: largest_x = x
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if x < smallest_x: smallest_x = x
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elif operand.startswith("Y"):
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y = float(operand[1:])
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if y > largest_y: largest_y = y
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if y < smallest_y: smallest_y = y
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elif operand.startswith("Z{}".format(self.touch_height + self.raise_height)):
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# signify a lift
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if prev_x is not None and prev_y is not None and self.lift_markers:
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self.context.arc(prev_x - self.head_x_offset, prev_y, 0.5, 0, 2*math.pi)
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self.context.stroke()
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prev_x = None
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prev_y = None
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x = None
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y = None
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if (prev_x != x and prev_x is not None) or (prev_y != y and prev_y is not None):
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self.context.line_to(prev_x - self.head_x_offset, prev_y)
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self.context.line_to(x - self.head_x_offset, y)
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self.context.stroke()
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print("Largest X : " + str(largest_x))
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print("Smallest X : " + str(smallest_x))
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print("Largest Y : " + str(largest_y))
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print("Smallest Y : " + str(smallest_y))
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if largest_x > self.bed_max_x:
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print("X OVERFLOW")
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if largest_y > self.bed_max_y:
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print("Y OVERFLOW")
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if smallest_x < self.bed_min_x:
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print("X_UNDERFLOW")
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if smallest_y < self.bed_min_y:
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print("Y_UNDERFLOW")
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def convert_gcode(self):
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# read in the svg
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paths, attributes = svg2paths("tmp/conversion-output.svg")
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bounding_x_max = None
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bounding_x_min = None
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bounding_y_max = None
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bounding_y_min = None
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for path in paths:
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bbox = path.bbox()
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if bounding_x_max is None or bbox[0] > bounding_x_max:
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bounding_x_max = bbox[0]
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if bounding_x_min is None or bbox[1] < bounding_x_min:
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bounding_x_min = bbox[1]
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if bounding_y_max is None or bbox[2] > bounding_y_max:
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bounding_y_max = bbox[2]
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if bounding_y_min is None or bbox[3] > bounding_y_min:
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bounding_y_min = bbox[3]
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print("Maximum X : {}".format(bounding_x_max))
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print("Minimum Y : {}".format(bounding_x_min))
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print("Maximum X : {}".format(bounding_y_max))
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print("Minimum Y : {}".format(bounding_y_min))
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max_dim = max(bounding_x_max, bounding_x_min, bounding_y_max, bounding_y_min)
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scale = (300 - self.offset_x) / max_dim
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print("Scaling to : {}\n".format(scale))
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# Start the gcode
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gcode = ""
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gcode += self.gcode_preamble
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# Walk through the paths and create the GCODE
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for path in paths:
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previous_x = None
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previous_y = None
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for part in path:
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start = part.start
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end = part.end
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start_x = start.real * scale + self.offset_x
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start_y = start.imag * scale + self.offset_y
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end_x = end.real * scale + self.offset_x
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end_y = end.imag * scale + self.offset_y
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# Check to see if the endpoint of the last cycle continues and wether we need to lift the pen or not
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lift = True
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if previous_x is not None and previous_y is not None:
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if abs(start.real - previous_x) < 30 and abs(start.imag - previous_y) < 30:
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lift = False
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# if the pen needs to lift,
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# if lift:
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previous_x = end.real
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previous_y = end.imag
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if lift:
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gcode += "G1 Z{}\n".format(self.raise_height + self.touch_height)
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else:
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gcode += "# NOT LIFTING\n"
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if isinstance(part, CubicBezier):
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nodes = np.asfortranarray([
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[start.real, part.control1.real, part.control2.real, end.real],
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[start.imag, part.control1.imag, part.control2.imag, end.imag],
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])
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curve = bezier.Curve.from_nodes(nodes)
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evals = []
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pos = np.linspace(0.1, 1, 10)
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for i in pos:
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evals.append(curve.evaluate(i))
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gcode += "G1 X{} Y{}\n".format(start_x, start_y)
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gcode += "G1 Z{} \n".format(self.touch_height)
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for i in evals:
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x = i[0][0]
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y = i[1][0]
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gcode += "G1 X{} Y{}\n".format(x * scale + self.offset_x, y * scale + self.offset_y)
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if isinstance(part, Line):
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gcode += "G1 X{} Y{}\n".format(start_x, start_y)
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gcode += "G1 Z{} \n".format(self.touch_height)
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gcode += "G1 X{} Y{}\n".format(end_x, end_y)
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gcode += self.gcode_end
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output_gcode = open("output/gcode-output.gcode", "w")
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output_gcode.write(gcode)
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output_gcode.close()
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if __name__ == "__main__":
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GCoder()
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