Text not rendered because of big offset in glyph bbox

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I try to render some text on a NVidia Tegra system. I'm using cairo 1.16.0 =
and=20
the NVidia drivers.

My testcase is quite simple:

pango-view "--text=3D|" -qo abc.png

=46or me it looks like things get weird in _cairo_scaled_glyph_set_metrics(=
):

The area looks like this:

(gdb) p min_device_y                                                       =
                                        =20
$4 =3D -12                                                                 =
                                          =20
(gdb) p min_device_x                                                       =
                                        =20
$5 =3D 4                                                                   =
                                          =20
(gdb) p max_device_x                                                       =
                                        =20
$6 =3D 6                                                                   =
                                          =20
(gdb) p max_device_y                                                       =
                                        =20
$7 =3D 3                                                                   =
                                          =20

But that is what ends up in the bbox:

(gdb) p scaled_glyph->bbox
$9 =3D {p1 =3D {x =3D 1119354880, y =3D 1119354879}, p2 =3D {x =3D 11193548=
80, y =3D=20
1119354880}}

In my opinion this looks really strange:

Breakpoint 1, _cairo_fixed_from_double (d=3D4) at cairo-fixed-private.h:118
118         u.d =3D d + CAIRO_MAGIC_NUMBER_FIXED;
(gdb) n
120         return u.i[1];
(gdb) p u
$1 =3D {d =3D 26388279066628, i =3D {1024, 1119354880}}
(gdb) p d
$2 =3D 4

This causes all glyphs to be discarded later:

Breakpoint 3, _cairo_gstate_transform_glyphs_to_backend (gstate=3D0x2eb50,=
=20
glyphs=3D0xbeffe7c0, num_glyphs=3D1, clusters=3D0
x0, num_clusters=3D0, cluster_flags=3D(unknown: 0), transformed_glyphs=3D0x=
beffdf38,                                     =20
    num_transformed_glyphs=3D0xbeffd404, transformed_clusters=3D0x0) at cai=
ro-
gstate.c:2297
2297                    if (!drop || KEEP_GLYPH (transformed_glyphs[j]))
(gdb) p x1
$14 =3D -160
(gdb) p x2
$15 =3D 190
(gdb) p y1
$16 =3D -160
(gdb) p y2
$17 =3D 199
(gdb) p transformed_glyphs[j]
$18 =3D {index =3D 95, x =3D 4372480, y =3D 4372494}

KEEP_GLYPH will decide that this is far beyond anything reasonable and drop=
=20
it.

Cairo is build with vanilla gcc 8.2.0 and was configured like this:

++ CFLAGS=3D'-O2 -g -mcpu=3Dcortex-a15 -mfloat-abi=3Dhard -mfpu=3Dneon-vfpv=
4 -pipe -
Wl,--no-copy-dt-needed-entries,--as-needed -Wl,--build-id -Wdate-time -O0'
++ ./configure --build=3Dx86_64-pc-linux-gnu --host=3Darm-unknown-linux-gnu=
eabi --
target=3Darm-unknown-linux-gnueabi --prefix=3D/usr --disable-silent-rules --
enable-gobject=3Dyes --enable-gl

Can anyone give me a hint where I need to poke to get that right?

Eike
=2D-=20
Rolf Eike Beer, emlix GmbH, http://www.emlix.com
=46on +49 551 30664-0, Fax +49 551 30664-11
Gothaer Platz 3, 37083 G=C3=B6ttingen, Germany
Sitz der Gesellschaft: G=C3=B6ttingen, Amtsgericht G=C3=B6ttingen HR B 3160
Gesch=C3=A4ftsf=C3=BChrung: Heike Jordan, Dr. Uwe Kracke =E2=80=93 Ust-IdNr=
=2E: DE 205 198 055

emlix - smart embedded open source
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