Eli Zaretskii <eliz@gnu.org> writes:

> Once again, a full detailed recipe could help establish whether
> there's a difference between our systems.

The attached tgz file contains
  test-svg/appearance-abc.png
  test-svg/appearance-png.png
  test-svg/appearance-subdir.png
  test-svg/emacs.png
  test-svg/sample-abc.svg
  test-svg/sample-png.svg
  test-svg/subdir/sample-subdir.svg

test-svg/appearance-*.png are screen shots when viewing SVG files
by C-x C-f.

test-svg/appearance-abc.png is for test-svg/sample-abc.svg
(three rectangles instead of "ABC").

test-svg/appearance-png.png is for test-svg/sample-png.svg
(a scaled emacs icon, expected image).

test-svg/appearance-subdir.png is for test-svg/subdir/sample-subdir.svg
(a blue square without the emacs icon, unexpected image).

Type C-x C-f test-svg/sample-png.svg
and evaluate (setq buffer-file-name nil)
and type C-c C-c C-c C-c(image-toggle-display twice),
then the image looks same as test-svg/appearance-subdir.png.

>> I obtained librsvg-2.40.1-2-w32-bin.zip
>> from http://sourceforge.net/projects/ezwinports/files/.
>
> What about the PNG library?  Is it possible you are using one that is
> different from what came with librsvg-2.40.1-2-w32-bin.zip?  librsvg
> uses libpng internally.

I copied bin/*.dll files in librsvg-2.40.1-2-w32-bin.zip
into emacs bin directory, including libpng16-16.dll.
  bin/libcairo-2.dll
  bin/libcroco-0.6-3.dll
  bin/libffi-6.dll
  bin/libgdk_pixbuf-2.0-0.dll
  bin/libgio-2.0-0.dll
  bin/libglib-2.0-0.dll
  bin/libgmodule-2.0-0.dll
  bin/libgobject-2.0-0.dll
  bin/libiconv-2.dll
  bin/libintl-8.dll
  bin/libpango-1.0-0.dll
  bin/libpangocairo-1.0-0.dll
  bin/libpangowin32-1.0-0.dll
  bin/libpixman-1-0.dll
  bin/libpng16-16.dll
  bin/librsvg-2-2.dll
  bin/libxml2-2.dll
  bin/zlib1.dll