summaryrefslogtreecommitdiffstats
path: root/layout/reftests/fonts/README
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /layout/reftests/fonts/README
parentInitial commit. (diff)
downloadfirefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--layout/reftests/fonts/README33
1 files changed, 33 insertions, 0 deletions
diff --git a/layout/reftests/fonts/README b/layout/reftests/fonts/README
new file mode 100644
index 0000000000..fd2410568f
--- /dev/null
+++ b/layout/reftests/fonts/README
@@ -0,0 +1,33 @@
+
+Notes about fonts in this directory
+
+Ahem.ttf - ACID3 test font
+
+markXXX.ttf and markXXX.otf
+
+These fonts are autogenerated with FontForge using the Python script mark-generate.py.
+See the comments in that file for more information on how to run the script.
+
+The markX.ttf and markX.otf fonts contain a single glyph for the X character consisting
+of three stacked boxes. The mark2X.ttf and mark2X.otf files also contain just a glyph for the
+character X but the glyph is similar to the space mark character. The markXmark2Y.ttf has
+two glyphs, the first glyph for X and the second glyph for Y.
+
+The markA.eot and markB.eot files are for EOT-related testing. The markA.eot file is just
+a copy of markA.ttf while markB.eot is a valid EOT file embedding the contents of markB.ttf
+with a null root string (so it can be used in IE without domain-specific restrictions).
+
+
+PositioningTest1.ttf, PositioningTest2.ttf
+
+These fonts were generated with FontForge and then OpenType tables added with MS VOLT.
+The glyphs are from Charis SIL (see http://scripts.sil.org/CharisSILFont), released under the
+Open Font License.
+
+In both fonts, the lowercase 'o' glyph should appear raised when rendered. Font 1 uses a GPOS
+positioning rule to achieve this, so it tests whether vertical deltas are being handled
+correctly. Font 2 uses a GSUB substitution to replace the 'o' with a glyph that has already
+been offset within the em-square, so no vertical delta is involved.
+
+Finally, the capital 'O' character maps directly to the shifted 'o' glyph, so this can be
+used for comparison without requiring any OpenType layout support.