8000 ps: Fix anchoring of rotated usetex text · matplotlib/matplotlib@5c52beb · GitHub
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ps: Fix anchoring of rotated usetex text
In PostScript, usetex text is anchored to the bottom left for replacement by psfrag, while in Matplotlib, text is placed by the baseline usually. So PostScript subtracts the text depth from the y position, but for rotated text, this subtraction should also be in a rotated direction.
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‎lib/matplotlib/backends/backend_ps.py

Lines changed: 4 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -588,8 +588,10 @@ def draw_tex(self, gc, x, y, s, prop, angle, *, mtext=None):
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s = fontcmd % s
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tex = r'\color[rgb]{%s} %s' % (color, s)
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# Stick to the bottom alignment.
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pos = _nums_to_str(x, y-bl)
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# Stick to bottom-left alignment, so subtract descent from the text-normal
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# direction since text is normally positioned by its baseline.
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rangle = np.radians(angle + 90)
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pos = _nums_to_str(x - bl * np.cos(rangle), y - bl * np.sin(rangle))
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self.psfrag.append(
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r'\psfrag{%s}[bl][bl][1][%f]{\fontsize{%f}{%f}%s}' % (
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thetext, angle, fontsize, fontsize*1.25, tex))

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