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Fix: fix text position after translate #343

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Fix: fix text position after translate #343

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6 changes: 5 additions & 1 deletion pdf2zh/pdfinterp.py
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Original file line number Diff line number Diff line change
Expand Up @@ -269,8 +269,12 @@ def process_page(self, page: PDFPage) -> None:
self.device.fontmap = self.fontmap
ops_new = self.device.end_page(page)
# 上面渲染的时候会根据 cropbox 减掉页面偏移得到真实坐标，这里输出的时候需要用 cm 把页面偏移加回来
# 文字调整过后的位置是以经过 cm 变换后的坐标系为准的，所以需要把 cm 的变换加回去
# 上面的 ctm 会在 render_contents 里面与 cm 进行计算，所以这里直接使用 self.ctm 的值
(a, b, c, d, e, f) = self.ctm
self.obj_patch[page.page_xref] = (
f"q {ops_base}Q 1 0 0 1 {x0} {y0} cm {ops_new}" # ops_base 里可能有图，需要让 ops_new 里的文字覆盖在上面，使用 q/Q 重置位置矩阵
f"q {ops_base}Q {a} 0 0 {d} {-e if a > 0 else e} {-f if d > 0 else f} cm {ops_new}"
# ops_base 里可能有图，需要让 ops_new 里的文字覆盖在上面，使用 q/Q 重置位置矩阵
)
for obj in page.contents:
self.obj_patch[obj.objid] = ""
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