sw HTML export: force PNG output harder in reqif mode

Need to disable one more flag to avoid GIF for transparent images.

Also start asserting reqif-xhtml output with an XML parser.

Change-Id: I1395812a5ddfd56cee4acacf6dea46c6e413b736
Reviewed-on: https://gerrit.libreoffice.org/57630
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins

1 files changed, 1 insertions, 0 deletions

diff --git a/sw/source/filter/html/htmlflywriter.cxx b/sw/source/filter/html/htmlflywriter.cxx
index 6db21469f368..79b111405704 100644
--- a/sw/source/filter/html/htmlflywriter.cxx
+++ b/sw/source/filter/html/htmlflywriter.cxx
@@ -1837,6 +1837,7 @@ static Writer& OutHTML_FrameFormatGrfNode( Writer& rWrt, const SwFrameFormat& rF
                 // output.
                 aFilterName = "PNG";
                 nFlags &= ~XOutFlags::UseNativeIfPossible;
+                nFlags &= ~XOutFlags::UseGifIfSensible;
                 aMimeType = "image/png";
             }