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optionally use PyGObject and pycario instead of pgi and cairocffi

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pgi doesn't work with python 3.12, but PyGObject and pycario does work
This commit is contained in:
Jenny Danzmayr 2024-08-13 21:30:02 +02:00
parent aa49840806
commit f56b6416df
2 changed files with 21 additions and 10 deletions
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29
src/c3nav/mapdata/render/engines/svg.py
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@ -17,10 +17,16 @@ from c3nav.mapdata.render.engines.base import FillAttribs, RenderEngine, StrokeA
from c3nav.mapdata.utils.geometry import unwrap_geom
if settings.SVG_RENDERER == 'rsvg':
import pgi
pgi.require_version('Rsvg', '2.0')
import cairocffi
from pgi.repository import Rsvg
try:
import pgi
pgi.require_version('Rsvg', '2.0')
from pgi.repository import Rsvg
import cairocffi as cairo
except ImportError:
import gi
gi.require_version('Rsvg', '2.0')
import cairo
from gi.repository import Rsvg
elif settings.SVG_RENDERER == 'rsvg-convert':
from PIL import Image
@ -106,8 +112,8 @@ class SVGEngine(RenderEngine):
if settings.SVG_RENDERER == 'rsvg':
# create buffered surfaces
buffered_surface = cairocffi.SVGSurface(None, self.buffered_width, self.buffered_height)
buffered_context = cairocffi.Context(buffered_surface)
buffered_surface = cairo.SVGSurface(None, self.buffered_width, self.buffered_height)
buffered_context = cairo.Context(buffered_surface)
# draw svg with rsvg
handle = Rsvg.Handle()
@ -115,18 +121,21 @@ class SVGEngine(RenderEngine):
svg.render_cairo(buffered_context)
# create cropped image
surface = buffered_surface.create_similar(cairocffi.CONTENT_COLOR, self.width, self.height)
context = cairocffi.Context(surface)
surface = buffered_surface.create_similar(cairo.CONTENT_COLOR, self.width, self.height)
context = cairo.Context(surface)
# set background color
context.set_source(cairocffi.SolidPattern(*self.background_rgb))
context.set_source(cairo.SolidPattern(*self.background_rgb))
context.paint()
# paste buffered immage with offset
context.set_source_surface(buffered_surface, -self.buffer, -self.buffer)
context.paint()
return surface.write_to_png()
f = io.BytesIO()
surface.write_to_png(f)
f.seek(0)
return f.read()
elif settings.SVG_RENDERER == 'rsvg-convert':
p = subprocess.run(('rsvg-convert', '-b', self.background, '--format', 'png'),

2
src/requirements/rsvg-pygobjet.txt Normal file
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@ -0,0 +1,2 @@
PyGObject==3.48.2
pycairo==1.26.1