/usr/share/libAfterImage/doc/html/index.html
/usr/share/libAfterImage/doc/html/Glossary.html
/usr/share/libAfterImage/doc/html/asflip.html
/usr/share/libAfterImage/doc/html/asview.html
/usr/share/libAfterImage/doc/html/ascmap.html
/usr/share/libAfterImage/doc/html/asimagexml.html
/usr/share/libAfterImage/doc/html/common.html
/usr/share/libAfterImage/doc/html/astile.html
/usr/share/libAfterImage/doc/html/asfont.html
/usr/share/libAfterImage/doc/html/char2uni.html
/usr/share/libAfterImage/doc/html/imencdec.html
/usr/share/libAfterImage/doc/html/asscale.html
/usr/share/libAfterImage/doc/html/asmerge.html
/usr/share/libAfterImage/doc/html/transform.html
/usr/share/libAfterImage/doc/html/asgrad.html
/usr/share/libAfterImage/doc/html/blender.html
/usr/share/libAfterImage/doc/html/ximage.html
/usr/share/libAfterImage/doc/html/import.html
/usr/share/libAfterImage/doc/html/afterimage.html
/usr/share/libAfterImage/doc/html/asimage.html
/usr/share/libAfterImage/doc/html/astext.html
/usr/share/libAfterImage/doc/html/asvisual.html
/usr/share/libAfterImage/doc/html/ascompose.html
/usr/share/libAfterImage/doc/html/export.html
I haven't tested, but setting AFTER_DOC_DIR during make install to
/usr/share/doc/${PF}/html should be enough to install it in the proper location
for Gentoo filesystem layout.