Created attachment 550540 [details, diff] heif_support.patch It appears that gimp currently has --without-libheif explicitly set in src_configure. Modifying the ebuild to add libheif support and testing it out on some HEIF images appeared to work. Attaching a simple example patch to the ebuild+metadata.xml.
Thanks for the patch!
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=a80b8874e5125c39029b51e0ecfb32a93a227c09 commit a80b8874e5125c39029b51e0ecfb32a93a227c09 Author: Sebastian Pipping <sping@gentoo.org> AuthorDate: 2018-10-14 18:10:40 +0000 Commit: Sebastian Pipping <sping@gentoo.org> CommitDate: 2018-10-14 18:25:01 +0000 media-gfx/gimp: Unlock support for HEIF images Closes: https://bugs.gentoo.org/668262 Based on patch by Doppler, thanks! Signed-off-by: Sebastian Pipping <sping@gentoo.org> Package-Manager: Portage-2.3.50, Repoman-2.3.11 media-gfx/gimp/gimp-2.10.6-r1.ebuild | 9 +++++---- media-gfx/gimp/gimp-9999.ebuild | 7 ++++--- media-gfx/gimp/metadata.xml | 3 +++ 3 files changed, 12 insertions(+), 7 deletions(-)