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Allow asymmetric PDF export resolution

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Allow PDF exporting resolution to be specified as a tuple too, to get asymmetric DPIs sometimes used by sticker/inkjet printers, e.g 600x1200dpi.
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tzjtan 2019-04-01 22:00:26 -04:00 committed by GitHub
parent 4f3b44960f
commit f8d46cc79c
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 10 additions and 5 deletions
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15
src/PIL/PdfImagePlugin.py
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@ -56,7 +56,12 @@ def _save(im, fp, filename, save_all=False):
existing_pdf = PdfParser.PdfParser(f=fp, filename=filename, mode="w+b")
resolution = im.encoderinfo.get("resolution", 72.0)
# Allows the user to specify either a 1D resolution or 2D resolution.
if not isinstance(resolution,(list,tuple)):
resolution2D = (resolution,resolution)
else:
resolution2D = resolution
info = {
"title": None if is_appending else os.path.splitext(
os.path.basename(filename)
@ -211,8 +216,8 @@ def _save(im, fp, filename, save_all=False):
MediaBox=[
0,
0,
int(width * 72.0 / resolution),
int(height * 72.0 / resolution)
int(width * 72.0 / resolution2D[0]),
int(height * 72.0 / resolution2D[1])
],
Contents=contents_refs[pageNumber])
@ -221,8 +226,8 @@ def _save(im, fp, filename, save_all=False):
page_contents = PdfParser.make_bytes(
"q %d 0 0 %d 0 0 cm /image Do Q\n" % (
int(width * 72.0 / resolution),
int(height * 72.0 / resolution)))
int(width * 72.0 / resolution2D[0]),
int(height * 72.0 / resolution2D[1])))
existing_pdf.write_obj(contents_refs[pageNumber],
stream=page_contents)