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Backport PR #32101 on branch v3.11.x (Cairo: Switch back to character codes for mathtext) #32102

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Backport PR #32101 on branch v3.11.x (Cairo: Switch back to character codes for mathtext) #32102

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10 changes: 3 additions & 7 deletions lib/matplotlib/backends/backend_cairo.py
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Original file line number Diff line number Diff line change
Expand Up @@ -8,7 +8,6 @@

import functools
import gzip
import itertools
import math

import numpy as np
Expand Down Expand Up @@ -249,15 +248,12 @@ def _draw_mathtext(self, gc, x, y, s, prop, angle):
if angle:
ctx.rotate(np.deg2rad(-angle))

for (font, fontsize), font_glyphs in itertools.groupby(
glyphs, key=lambda info: (info[0], info[1])):
for font, fontsize, ccode, _glyph_index, ox, oy in glyphs:
ctx.new_path()
ctx.move_to(ox, -oy)
ctx.select_font_face(*_cairo_font_args_from_font_prop(ttfFontProperty(font)))
ctx.set_font_size(self.points_to_pixels(fontsize))
ctx.show_glyphs([
(glyph_index, ox, -oy)
for _font, _size, _ccode, glyph_index, ox, oy in font_glyphs
])
ctx.show_text(chr(ccode))

for ox, oy, w, h in rects:
ctx.new_path()
Expand Down
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