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GRC/Screenshots: create ImageSurface with int dimensions

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Since cairo.ImageSurface is pixel-based, it only accepts integer dimensions.

No need to round up – proper rounding and padding make this quite safe.

Signed-off-by: Marcus Müller <mmueller@gnuradio.org>
This commit is contained in:
Marcus Müller 2022-07-10 17:47:33 +02:00 committed by mormj
parent 75bf01eeca
commit f302cf5eee
1 changed files with 7 additions and 1 deletions
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8
gui/Utils.py
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@ -108,7 +108,13 @@ def make_screenshot(flow_graph, file_path, transparent_bg=False):
height = y_max - y_min + 2 * padding
if file_path.endswith('.png'):
psurf = cairo.ImageSurface(cairo.FORMAT_ARGB32, width, height)
# ImageSurface is pixel-based, so dimensions need to be integers
# We don't round up here, because our padding should allow for up
# to half a pixel size in loss of image area without optically bad
# effects
psurf = cairo.ImageSurface(cairo.FORMAT_ARGB32,
round(width),
round(height))
elif file_path.endswith('.pdf'):
psurf = cairo.PDFSurface(file_path, width, height)
elif file_path.endswith('.svg'):