[Poppler-bugs] [Bug 104864] poppler_page_render_for_printing on cairo_pdf_surface repeats content

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104864

--- Comment #3 from Jaime Velasco Juan <jsagarribay at gmail.com> ---
Created attachment 137578
  --> https://bugs.freedesktop.org/attachment.cgi?id=137578&action=edit
derive image surface UNIQUE_ID from its  contents

In CairoOutputDev::setMimeData we set CAIRO_MIME_TYPE_UNIQUE_ID to
"poppler-surface-{ref.gen}-{ref.num}", and the same ref number is likely reused
in several files, especially with scanned documents.

Set the ID to "poppler-surface-{digest}-{ref.gen}-{ref.num}" to avoid merging
unrelated images in the output surface.

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