Why am I getting ValueError when trying to render PNG?
Question
I have some SVGs that I would like to save as PNGs with Python. I am using svglib to handle this process. Whenever I try to renderPM.drawToFile(logo, path, fmt) it returns the following error:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Users\Myself\Desktop\programming\project-folders\svg-to-png\venv\lib\site-packages\reportlab\graphics\renderPM.py", line 683, in drawToFile
c.saveToFile(fn,fmt)
File "C:\Users\Myself\Desktop\programming\project-folders\svg-to-png\venv\lib\site-packages\reportlab\graphics\renderPM.py", line 321, in saveToFile
im = self.toPIL()
File "C:\Users\Myself\Desktop\programming\project-folders\svg-to-png\venv\lib\site-packages\reportlab\graphics\renderPM.py", line 317, in toPIL
(getattr(im,'frombytes',None) or getattr(im,'fromstring'))(self._gs.pixBuf)
File "C:\Users\Myself\Desktop\programming\project-folders\svg-to-png\venv\lib\site-packages\PIL\Image.py", line 827, in frombytes
d.setimage(self.im)
ValueError: tile cannot extend outside image
Here is the code I entered in the python shell to get these results (see documentation) :
>>> from svglib.svglib import svg2rlg
>>> from reportlab.graphics import renderPM
>>> logo = svg2rlg(r'C:\Users\Myself\Desktop\testenv\test.svg')
>>> renderPM.drawToFile(logo, r'C:\Users\Myself\Desktop\testenv\test.png', fmt='PNG')
Here is the SVG that I am trying to export as PNG (using a very simple SVG for testing):
<!DOCTYPE html>
<html>
<body>
<svg xmlns="http://www.w3.org/2000/svg" height="500" width="500">
<polygon points="200,10 250,190 160,210" style="fill:lime;stroke:purple;stroke-width:1" />
</svg>
</body>
</html>
I have looked at many similar problems to try to find an answer, but I am not having any luck.
1 answers
solution1
0 2022-05-12 20:14:44
As mentioned by @Robert Longson , the HTML file was giving me the value error. I changed the document to include the proper format, which fixed my issue:
<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 400 400">
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