[Fontconfig] rotation by matrix make trouble
Sat, 1 Mar 2003 21:57:26 +0900
according to kp said on #unicode, I tried number of sets of matrix.
and unexpected behaviour found;
1. 1 0 0 1 default set and similar variable just make font variables without rotation.
2. 1 0 0 -1 or -1 0 0 1 to flip by x or y axis, it really trouble.
nagitive element of matrix seems to make change on axis of whole text.
i.e. with y-flip matrix, glyph printed on above of textview.
so I can only one or two lines of pixel of the glyphs.
and I think that CRLF make line further up, not down as normal.
I suspect this is used for BiDi. but cannot sure.
3. 0 1 -1 0 for 90 degrees rotation also make trouble.
I cannot sure this case is differ from 2.
if the absence of vertical metric is matter, or not...
<!-- multiply the matrix to slant the font -->
<edit name="matrix" mode="assign">
was the configuration used.