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laser-gcode-exporter-inkscape-plugin
Commit ba27a8ba authored by nextime's avatar nextime
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Dither images based on laser power

parent 2103e7b7
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Showing with 48 additions and 27 deletions
turnkeylaser.py
View file @ ba27a8ba
...@@ -951,7 +951,7 @@ class Gcode_tools(inkex.Effect): ...@@ -951,7 +951,7 @@ class Gcode_tools(inkex.Effect):
self.skipped = 0 self.skipped = 0
def compile_paths(parent, node, trans): def compile_paths(parent, node, trans, laserPower=100):
# Apply the object transform, along with the parent transformation # Apply the object transform, along with the parent transformation
mat = node.get('transform', None) mat = node.get('transform', None)
path = {} path = {}
...@@ -986,7 +986,7 @@ class Gcode_tools(inkex.Effect): ...@@ -986,7 +986,7 @@ class Gcode_tools(inkex.Effect):
# This node is a group of other nodes # This node is a group of other nodes
pathsGroup = [] pathsGroup = []
for child in node.iterchildren(): for child in node.iterchildren():
data = compile_paths(parent, child, trans) data = compile_paths(parent, child, trans, laserPower)
#inkex.errormsg(str(data)) #inkex.errormsg(str(data))
if type(data) is not list: if type(data) is not list:
pathsGroup.append(data.copy()) pathsGroup.append(data.copy())
...@@ -1015,13 +1015,36 @@ class Gcode_tools(inkex.Effect): ...@@ -1015,13 +1015,36 @@ class Gcode_tools(inkex.Effect):
else: else:
im = Image.open(filename).convert('L') im = Image.open(filename).convert('L')
img = ImageOps.invert(im) img = ImageOps.invert(im)
#Get the image size #Get the image size
imageDataWidth, imageDataheight = img.size imageDataWidth, imageDataheight = img.size
# dithering image and compile the pixels
inkex.errormsg("start dithering.")
palette=list(set(img.convert("P", palette=Image.ADAPTIVE, colors=laserPower-1).getpalette()))
inkex.errormsg("dither for "+str(len(palette))+" colors palette...")
pixel = img.load()
pixels = []
for line in range(0, imageDataheight):
r=[]
for row in range(0, imageDataWidth):
oldpix = pixel[row, line]
newpix = min(palette, key=lambda p:abs(p-oldpix))
quant_error = oldpix - newpix
try:
pixel[row+1, line] = pixel[row+1, line] + quant_error * 7/16
pixel[row-1, line+1] = pixel[row-1, line+1] + quant_error * 3/16
pixel[row, line+1] = pixel[row, line+1] + quant_error * 5/16
pixel[row+1, line+1] = pixel[row+1, line+1] + quant_error * 1/16
except:
pass
pixels = [[pixel[r, l] for r in xrange(imageDataWidth)] for l in xrange(imageDataheight)]
#Compile the pixels. #Compile the pixels.
pixels = list(img.getdata()) #pixels = list(img.getdata())
pixels = [pixels[i * (imageDataWidth):(i + 1) * (imageDataWidth)] for i in xrange(imageDataheight)] #pixels = [pixels[i * (imageDataWidth):(i + 1) * (imageDataWidth)] for i in xrange(imageDataheight)]
path['type'] = "raster" path['type'] = "raster"
path['width'] = imageDataWidth path['width'] = imageDataWidth
...@@ -1177,6 +1200,22 @@ class Gcode_tools(inkex.Effect): ...@@ -1177,6 +1200,22 @@ class Gcode_tools(inkex.Effect):
trans = layer.get('transform', None) trans = layer.get('transform', None)
trans = simpletransform.parseTransform(trans) trans = simpletransform.parseTransform(trans)
#Determind the power of the laser that this layer should be cut at.
#If the layer is not named as an integer value then default to the laser intensity set at the export settings.
#Fetch the laser power from the export dialog box.
laserPower = self.options.laser
try:
if (int(layerName) > 0 and int(layerName) <= 100):
laserPower = int(layerName)
else :
laserPower = self.options.laser
except ValueError,e:
laserPower = self.options.laser
inkex.errormsg("Unable to parse power level for layer name. Using default power level %d percent." % (self.options.laser))
for node in layer.iterchildren(): for node in layer.iterchildren():
if (node in selected): if (node in selected):
#Vector path data, cut from x to y in a line or curve #Vector path data, cut from x to y in a line or curve
...@@ -1184,14 +1223,13 @@ class Gcode_tools(inkex.Effect): ...@@ -1184,14 +1223,13 @@ class Gcode_tools(inkex.Effect):
logger.write("node %s" % str(node.tag)) logger.write("node %s" % str(node.tag))
selected.remove(node) selected.remove(node)
try: try:
newPath = compile_paths(self, node, trans).copy(); newPath = compile_paths(self, node, trans, laserPower).copy();
pathList.append(newPath) pathList.append(newPath)
inkex.errormsg("Built gcode for "+str(node.get("id"))+" - will be cut as %s." % (newPath['type']) ) inkex.errormsg("Built gcode for "+str(node.get("id"))+" - will be cut as %s." % (newPath['type']) )
except: except:
messageOnce = True messageOnce = True
for objectData in compile_paths(self, node, trans): for objectData in compile_paths(self, node, trans, laserPower):
#if (messageOnce): #if (messageOnce):
inkex.errormsg("Built gcode for group "+str(node.get("id"))+", item %s - will be cut as %s." % (objectData['id'], objectData['type']) ) inkex.errormsg("Built gcode for group "+str(node.get("id"))+", item %s - will be cut as %s." % (objectData['id'], objectData['type']) )
#messageOnce = False #messageOnce = False
...@@ -1205,21 +1243,6 @@ class Gcode_tools(inkex.Effect): ...@@ -1205,21 +1243,6 @@ class Gcode_tools(inkex.Effect):
continue continue
#Determind the power of the laser that this layer should be cut at.
#If the layer is not named as an integer value then default to the laser intensity set at the export settings.
#Fetch the laser power from the export dialog box.
laserPower = self.options.laser
try:
if (int(layerName) > 0 and int(layerName) <= 100):
laserPower = int(layerName)
else :
laserPower = self.options.laser
except ValueError,e:
laserPower = self.options.laser
inkex.errormsg("Unable to parse power level for layer name. Using default power level %d percent." % (self.options.laser))
#Switch between smoothie power levels and ramps+marlin power levels #Switch between smoothie power levels and ramps+marlin power levels
#ramps and marlin expect 0 to 100 while smoothie wants 0.0 to 1.0 #ramps and marlin expect 0 to 100 while smoothie wants 0.0 to 1.0
...@@ -1271,20 +1294,18 @@ class Gcode_tools(inkex.Effect): ...@@ -1271,20 +1294,18 @@ class Gcode_tools(inkex.Effect):
trans = simpletransform.parseTransform("") trans = simpletransform.parseTransform("")
for node in selected: for node in selected:
try: try:
newPath = compile_paths(self, node, trans).copy(); newPath = compile_paths(self, node, trans, laserPower).copy();
pathList.append(newPath) pathList.append(newPath)
inkex.errormsg("Built gcode for "+str(node.get("id"))+" - will be cut as %s." % (newPath['type']) ) inkex.errormsg("Built gcode for "+str(node.get("id"))+" - will be cut as %s." % (newPath['type']) )
except: except:
messageOnce = True messageOnce = True
for objectData in compile_paths(self, node, trans): for objectData in compile_paths(self, node, trans, laserPower):
#if (messageOnce): #if (messageOnce):
inkex.errormsg("Built gcode for group "+str(node.get("id"))+", item %s - will be cut as %s." % (objectData['id'], objectData['type']) ) inkex.errormsg("Built gcode for group "+str(node.get("id"))+", item %s - will be cut as %s." % (objectData['id'], objectData['type']) )
#messageOnce = False #messageOnce = False
pathList.append(objectData) pathList.append(objectData)
if (pathList): if (pathList):
for objectData in pathList: for objectData in pathList:
......
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