FabLab_Chemnitz/mightyscape-1.1-deprecated
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fix in imagetracer.js handling

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This commit is contained in:
Mario Voigt 2021-04-23 15:21:30 +02:00
parent 5949668e12
commit d9dfc3323b
1 changed files with 42 additions and 26 deletions
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68
extensions/fablabchemnitz/imagetracer.js/imagetracerjs.py
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@ -17,16 +17,23 @@ Features
Author: Mario Voigt / FabLab Chemnitz Author: Mario Voigt / FabLab Chemnitz
Mail: mario.voigt@stadtfabrikanten.org Mail: mario.voigt@stadtfabrikanten.org
Date: 18.08.2020 Date: 18.08.2020
Last patch: 18.08.2020 Last patch: 23.04.2021
License: GNU GPL v3 License: GNU GPL v3
Used version of imagetracerjs: https://github.com/jankovicsandras/imagetracerjs/commit/4d0f429efbb936db1a43db80815007a2cb113b34 Used version of imagetracerjs: https://github.com/jankovicsandras/imagetracerjs/commit/4d0f429efbb936db1a43db80815007a2cb113b34
ToDo:
- fix resizing if one or all of the following sizes are zero:
img_w = image.get('width')
img_h = image.get('height')
img_x = image.get('x')
img_y = image.get('y')
""" """
class Imagetracerjs (inkex.EffectExtension): class Imagetracerjs (inkex.EffectExtension):
def checkImagePath(self, node): def checkImagePath(self, element):
xlink = node.get('xlink:href') xlink = element.get('xlink:href')
if xlink and xlink[:5] == 'data:': if xlink and xlink[:5] == 'data:':
# No need, data alread embedded # No need, data alread embedded
return return
@ -39,7 +46,7 @@ class Imagetracerjs (inkex.EffectExtension):
# Backup directory where we can find the image # Backup directory where we can find the image
if not os.path.isfile(path): if not os.path.isfile(path):
path = node.get('sodipodi:absref', path) path = element.get('sodipodi:absref', path)
if not os.path.isfile(path): if not os.path.isfile(path):
inkex.errormsg('File not found "{}". Unable to embed image.').format(path) inkex.errormsg('File not found "{}". Unable to embed image.').format(path)
@ -70,32 +77,33 @@ class Imagetracerjs (inkex.EffectExtension):
pars.add_argument("--blurdelta", type=float, default=20.0, help="RGBA delta treshold for selective Gaussian blur preprocessing") pars.add_argument("--blurdelta", type=float, default=20.0, help="RGBA delta treshold for selective Gaussian blur preprocessing")
def effect(self): def effect(self):
# internal overwrite for scale: # internal overwrite for scale:
self.options.scale = 1.0 self.options.scale = 1.0
if (self.options.ids): if len(self.svg.selected) > 0:
for node in self.svg.selected.values(): images = self.svg.selection.filter(inkex.Image).values()
if node.tag == inkex.addNS('image', 'svg'): if len(images) > 0:
self.path = self.checkImagePath(node) # This also ensures the file exists for image in images:
self.path = self.checkImagePath(image) # This also ensures the file exists
if self.path is None: # check if image is embedded or linked if self.path is None: # check if image is embedded or linked
image_string = node.get('{http://www.w3.org/1999/xlink}href') image_string = image.get('{http://www.w3.org/1999/xlink}href')
# find comma position # find comma position
i = 0 i = 0
while i < 40: while i < 40:
if image_string[i] == ',': if image_string[i] == ',':
break break
i = i + 1 i = i + 1
image = Image.open(BytesIO(base64.b64decode(image_string[i + 1:len(image_string)]))) img = Image.open(BytesIO(base64.b64decode(image_string[i + 1:len(image_string)])))
else: else:
image = Image.open(self.path) img = Image.open(self.path)
# Write the embedded or linked image to temporary directory # Write the embedded or linked image to temporary directory
if os.name == "nt": if os.name == "nt":
exportfile = "imagetracerjs.png" exportfile = "imagetracerjs.png"
else: else:
exportfile ="/tmp/imagetracerjs.png" exportfile ="/tmp/imagetracerjs.png"
image.save(exportfile, "png") img.save(exportfile, "png")
nodeclipath = os.path.join("imagetracerjs-master", "nodecli", "nodecli.js") nodeclipath = os.path.join("imagetracerjs-master", "nodecli", "nodecli.js")
@ -124,17 +132,17 @@ class Imagetracerjs (inkex.EffectExtension):
command += " desc " + str(self.options.desc).lower() command += " desc " + str(self.options.desc).lower()
command += " blurradius " + str(self.options.blurradius) command += " blurradius " + str(self.options.blurradius)
command += " blurdelta " + str(self.options.blurdelta) command += " blurdelta " + str(self.options.blurdelta)
# Create the vector traced SVG file # Create the vector traced SVG file
with os.popen(command, "r") as tracerprocess: with os.popen(command, "r") as tracerprocess:
result = tracerprocess.read() result = tracerprocess.read()
if result != "imagetracerjs.png.svg was saved!\n": if "was saved!" not in result:
self.msg("Error while processing input: " + result) self.msg("Error while processing input: " + result)
self.msg("Check the image file (maybe convert and save as new file) and try again.") self.msg("Check the image file (maybe convert and save as new file) and try again.")
self.msg("\nYour parser command:") self.msg("\nYour parser command:")
self.msg(command) self.msg(command)
# proceed if traced SVG file was successfully created # proceed if traced SVG file was successfully created
if os.path.exists(exportfile + ".svg"): if os.path.exists(exportfile + ".svg"):
# Delete the temporary png file again because we do not need it anymore # Delete the temporary png file again because we do not need it anymore
@ -153,23 +161,31 @@ class Imagetracerjs (inkex.EffectExtension):
viewBox = doc.get('viewBox') #eg "0 0 700 600" viewBox = doc.get('viewBox') #eg "0 0 700 600"
trace_width = viewBox.split(' ')[2] trace_width = viewBox.split(' ')[2]
trace_height = viewBox.split(' ')[3] trace_height = viewBox.split(' ')[3]
newGroup.attrib['transform'] = "matrix(" + \
str(float(node.get('width')) / float(trace_width)) + \ img_w = image.get('width')
", 0, 0 , " + \ img_h = image.get('height')
str(float(node.get('height')) / float(trace_height)) + \ img_x = image.get('x')
"," + node.get('x') + \ img_y = image.get('y')
"," + node.get('y') + ")"
newGroup.append(doc) if img_w is not None and img_h is not None and img_x is not None and img_y is not None:
transform = "matrix({:1.6f}, 0, 0, {:1.6f}, {:1.6f}, {:1.6f})"\
.format(float(img_w) / float(trace_width), float(img_h) / float(trace_height), float(img_x), float(img_y))
newGroup.attrib['transform'] = transform
for child in doc.getchildren():
newGroup.append(child)
# Delete the temporary svg file # Delete the temporary svg file
if os.path.exists(exportfile + ".svg"): if os.path.exists(exportfile + ".svg"):
os.remove(exportfile + ".svg") os.remove(exportfile + ".svg")
#remove the old image or not #remove the old image or not
if self.options.keeporiginal is not True: if self.options.keeporiginal is not True:
node.delete() image.delete()
else:
self.msg("No images found in selection! Check if you selected a group instead.")
else: else:
self.msg("No image found for tracing. Please select an image first.") self.msg("Selection is empty. Please select one or more images.")
if __name__ == '__main__': if __name__ == '__main__':
Imagetracerjs().run() Imagetracerjs().run()