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fix(task-17): rotated sheets (plot_rotation 1/3) render the whole page instead of a 0.707-scaled, clipped window

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AutoCAD stores ISO A4 landscape as 210 x 297 media with plot_rotation 1;
paper-space X then runs along the 297 mm side. _paper_frame turned the
figure but not the axes window, so a 297 x 210 page carried a 210-wide data
window; set_aspect("equal") shrank the axes box to 0.707 and everything past
x = 210 minus the margin was cut, with ok: True and a MediaBox that read as
correct. The window now takes the turned size, and the margins turn with it
the way ezdxf's own Page.from_dxf_layout maps them (rotation 2 included).

Test: a rotated layout with a 277 mm frame exported to PNG; the ink must
reach the right of the sheet (it stopped at column 1314/1753, now 1752),
and the MediaBox still reads 297 x 210.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
This commit is contained in:
Umut CAN
2026-09-16 21:30:52 +03:00
co-authored by Claude Opus 5
parent f46fda10cb
commit 70f18efb4b
2 changed files with 84 additions and 9 deletions
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backends/ezdxf_backend.py
+28 -9
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@@ -2379,21 +2379,40 @@ class EzdxfBackend(AutoCADBackend):
"""The sheet as a matplotlib figure: size in inches plus the axes window.
Used by ``drawing_export_pdf`` so the PDF's /MediaBox *is* the paper.
``plot_rotation`` 1/3 swaps the figure; the content is not rotated by
the headless renderer (reported, not hidden).
``plot_rotation`` 1/3 is AutoCAD's landscape-on-portrait-media
convention: the media stays 210 x 297 and the sheet is turned, so
paper-space X runs along the 297 mm side. The figure *and* the axes
window both take the turned size — sizing only the figure left the
window 210 wide inside a 297 mm page, and ``set_aspect("equal")`` then
shrank the axes box to 0.707 and cut everything past x = 210 minus the
margin (measured: a 277 mm frame lost its right 27%, with ``ok: True``
and a MediaBox that read as correct). The margins turn with the sheet,
mapped the way ezdxf's own ``Page.from_dxf_layout`` maps them. What
the headless renderer still does not do is rotate the *content* on the
media (reported as ``rotation_applied``, not hidden).
"""
dxf = layout.dxf_layout.dxf
width, height = float(dxf.paper_width), float(dxf.paper_height)
rotation = int(dxf.plot_rotation)
unit = 25.4 if int(dxf.plot_paper_units) == 0 else 1.0
x0 = -(float(dxf.left_margin) + float(dxf.plot_origin_x_offset))
y0 = -(float(dxf.bottom_margin) + float(dxf.plot_origin_y_offset))
fig_w, fig_h = (height, width) if rotation in (1, 3) else (width, height)
top, right = float(dxf.top_margin), float(dxf.right_margin)
bottom, left = float(dxf.bottom_margin), float(dxf.left_margin)
if rotation == 1:
sheet_w, sheet_h, left, bottom = height, width, top, left
elif rotation == 2:
sheet_w, sheet_h, left, bottom = width, height, right, top
elif rotation == 3:
sheet_w, sheet_h, left, bottom = height, width, bottom, right
else:
sheet_w, sheet_h = width, height
x0 = -(left + float(dxf.plot_origin_x_offset))
y0 = -(bottom + float(dxf.plot_origin_y_offset))
return {
"size_mm": [round(fig_w, 2), round(fig_h, 2)],
"figsize": (fig_w / 25.4, fig_h / 25.4),
"xlim": (x0 / unit, (x0 + width) / unit),
"ylim": (y0 / unit, (y0 + height) / unit),
"size_mm": [round(sheet_w, 2), round(sheet_h, 2)],
"figsize": (sheet_w / 25.4, sheet_h / 25.4),
"xlim": (x0 / unit, (x0 + sheet_w) / unit),
"ylim": (y0 / unit, (y0 + sheet_h) / unit),
"rotation_applied": rotation == 0,
}