034d4d26f2
[hb-cairo] Minor simplify
2023-01-26 14:32:25 -05:00
26d34392e2
[hb-cairo] Fix condition
2023-01-26 14:32:25 -05:00
f9b3c79047
Update to different cairo API
...
The cairo will likely end up begin a getter for
a cairo_pattern_t instead of a color.
2023-01-26 14:32:25 -05:00
4afdbcbad5
[hb-cairo] Don't call get_foreground_color unnecessarily
...
That would invalidate cairo cache on foreground change, even
if the glyph doesn't need that.
2023-01-26 14:32:25 -05:00
c37ea4f93e
hb-cairo: Fix handling of foreground color
...
Use the new cairo_user_scaled_font_get_foreground_color
to obtain the foreground color, since the cr's source
can't be trusted.
Requires https://gitlab.freedesktop.org/cairo/cairo/-/merge_requests/420
2023-01-26 14:32:25 -05:00
aea37bfd37
Fix c++20 build
2023-01-26 12:19:16 -07:00
e1dc4920ee
[iter] Allow hb_len() to fetch c.len as non-function
2023-01-26 12:19:16 -07:00
8d29be39b2
[gsubgpos] Minor drop an unnecessary hb_iter
2023-01-26 12:19:16 -07:00
c1a5d20951
[doc] Add a missing comma
2023-01-25 21:53:06 -05:00
570fe998c9
[cairo] Another sweep_gradient fix
...
k was -1 sometimes.
Fixes the rest of https://roettsch.es/var_colrv1.html
2023-01-25 15:42:24 -07:00
ea316b56a0
[cairo] Flip offsets when reversing
...
Fixes many of the var_colrv1 first row tests.
https://roettsch.es/var_colrv1.html
2023-01-25 15:31:29 -07:00
5b05e198cf
[cairo] More hb_malloc
2023-01-25 15:24:14 -07:00
57352b8bd4
[cairo] Use hb_malloc / hb_free
2023-01-25 15:22:27 -07:00
a9392c0cbb
[cairo] Use hb_swap()
2023-01-25 14:57:02 -07:00
5e86870378
[instancer] compute head/maxp values using only non-empty glyphs
2023-01-25 14:53:19 -07:00
d15551c6f3
[instancer] update head table flagbit: allXMinIsLsb
2023-01-25 14:53:19 -07:00
2c49eba044
[cairo] Indent
2023-01-25 14:52:39 -07:00
2accbdc0b6
[paint] Minor skew
2023-01-25 14:40:04 -07:00
a4420479a8
Revert "[VarComposite] Fix skew"
...
This reverts commit 8cf7076309
2023-01-25 14:37:10 -07:00
8cf7076309
[VarComposite] Fix skew
2023-01-25 14:35:35 -07:00
626f8e4de3
[paint] Fix skew to match Chrome
2023-01-25 14:33:46 -07:00
b44ff062e1
[deserialize] Some more
2023-01-25 14:16:46 -07:00
57ff696430
[deserialize] One more fix
2023-01-25 14:10:12 -07:00
e973050986
[hb-buffer-deserialize] Fixups
2023-01-25 14:07:01 -07:00
a1101f09ca
[test-buffer-serialize] Handle too-small out buffer
...
Need to handle too-small in buffer still.
2023-01-25 13:10:57 -07:00
2fec4f1c3d
[subset] Finish out hb-subset-instancer-solver.cc
2023-01-25 12:21:15 -07:00
90a98dd62a
[instancer] fix potential memory leak for compiled glyph bytes
...
Also calculate max_offsets after glyph bytes are compiled, cause byte
length of a glyph might change after compile
2023-01-25 11:37:19 -07:00
223abd72b9
[subset] Add unfinished port of fonttools instancer solver
2023-01-25 11:37:07 -07:00
1b143b0f0c
[font] Docs
2023-01-24 18:34:04 -07:00
64ed03c9be
[cff1] Return no name for out-of-range glyph IDs
...
Was returning .notdef before.
2023-01-24 18:33:34 -07:00
c89aebc40b
hb-font: Document length limit for glyph names
...
This is useful information for users of the
hb_font_get_glyph_name() API.
2023-01-24 18:29:06 -07:00
27f72f0deb
[instancer] avoid double free for compiled glyph bytes
...
also increase the HB_GLYF_MAX_POINTS limit to 20000 cause the test file has a
.notdef glyph which is a composite glyph and has 10176 points after
get_points() call
2023-01-24 17:28:51 -07:00
b684c6edd4
[hb-cairo] Add hb_cairo_context_t
2023-01-24 12:21:12 -07:00
72e13fff65
[COLRv1] Handle void extents
2023-01-24 11:05:38 -07:00
20318feddf
[COLRv1] Don't return extents if glyph has no paint
...
Fixes https://github.com/harfbuzz/harfbuzz/issues/4068
2023-01-24 11:04:10 -07:00
32afdcdb46
[hb-buffer-deserialize-text-unicode] Relax parsing
2023-01-23 21:10:11 -07:00
328ee9b4ad
[hb-buffer-deserialize-text-unicodes] Rename
2023-01-23 21:06:27 -07:00
bc596b8cca
[buffer-deserialize-text-unicode] Simplify
2023-01-23 21:03:59 -07:00
649973a316
Fix build
2023-01-23 21:02:14 -07:00
4268283e54
[buffer-deserialize-text] Accept initial comma
2023-01-23 20:57:56 -07:00
2c29b81e7f
[buffer-deserialize-text] Separate glyphs / unicodes machines
2023-01-23 20:57:56 -07:00
d0355eb4bd
[buffer-deserialize] Parse whole items at a time
...
Previous logic would fail if char buffer was partial.
2023-01-23 20:57:56 -07:00
f65b04c17c
Tweak wording
2023-01-23 19:58:14 -07:00
7e01976bcc
[hb-paint] Add some details to the docs
2023-01-23 19:58:14 -07:00
e4fff64ce3
[repacker] check duplicate() for success.
...
Fixes fuzzer testcase https://oss-fuzz.com/testcase-detail/5475787333828608 .
2023-01-23 18:37:13 -07:00
6b72a4ddb0
Revert "[sanitize] Simplify(?) check_range"
...
This reverts commit af0b1ef8a7
2023-01-23 18:36:04 -07:00
00cf322e23
Merge pull request #4046 from harfbuzz/hb-features-docs
...
[doc] Try to fix generating hb-features docs
2023-01-23 16:06:26 -07:00
699485b349
[meson] Further simplify generating hb-features.h
2023-01-24 00:15:48 +02:00
2486d6d22f
[meson] Reduce repetitions
2023-01-24 00:15:48 +02:00
12f2ecbddb
[doc] Generate hb-supported-features.h
...
See inline comment.
2023-01-24 00:15:48 +02:00
0bbd3360ee
[doc] Try to fix generating hb-features docs
...
Move it to a separate section, since hb-common says include hb.h, while
we want to include hb-features.h here.
This still does not fix generating documentation of undefined macros
(e.g. HB_HAS_GDI since we build docs on Linux).
2023-01-24 00:12:06 +02:00
af0b1ef8a7
[sanitize] Simplify(?) check_range
2023-01-23 14:31:10 -07:00
fe94c760e1
[algs] Build fix for clang and __builtin_mul_overflow
...
Fixes https://github.com/harfbuzz/harfbuzz/issues/4066
2023-01-23 14:05:28 -07:00
1cf61f3053
[meson] Fix build with -Dgobject=disabled
2023-01-23 16:26:35 +02:00
def94aa8c5
[features] Add HB_HAS_GOBJECT
2023-01-22 14:01:34 -07:00
b3006ba9cb
Docs
2023-01-22 13:46:35 -07:00
e3e4d1ecdc
[name] Add hb_ot_name_id_predefined_t
...
Not sure what to do about its docs.
2023-01-22 13:41:43 -07:00
7a47a369d3
[hmtx] Fix typo
2023-01-22 09:09:45 -07:00
b987918125
Merge pull request #4052 from googlefonts/instancer_recalc_bounds
...
[instancer] recalc bounds by default when --instance option is enabled
2023-01-22 09:08:51 -07:00
749df4ee84
[PairPosFormat1] One more
2023-01-21 16:00:54 -07:00
b648ceb72f
[PairSet] Optimize last commit
2023-01-21 15:58:59 -07:00
891623243c
[PairSet] Unify get_size()
2023-01-21 15:57:18 -07:00
b63159e8bf
[PairPosFormat1] Fix stride
...
Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=55287
and generally the lookup with MediumTypes.
2023-01-21 15:51:40 -07:00
be8a87c453
Move TRACE_DISPATCH after may_recurse()
...
Such that we don't get memory access issues if DEBUG_SANITIZE is
on and may_recurse() returns false.
2023-01-21 15:50:25 -07:00
84b9a632ed
[debug] Fix printf signness warnings
2023-01-21 14:37:34 -07:00
c08e5d094a
[hb-draw] Fix MSVC warning
...
warning C4305: 'initializing': truncation from 'double' to 'float'
2023-01-21 15:27:56 +02:00
32f9b467d6
Merge pull request #4045 from harfbuzz/custom-palette-cairo
...
Custom palette cairo
2023-01-21 02:20:39 -05:00
47baa1da6b
[hb-cairo] Fixes for sweep gradients
...
Make reversed angles not infloop, and
cap the number of interval repetitions
at 1000.
Fixes: https://github.com/harfbuzz/harfbuzz/issues/4055
2023-01-20 23:38:22 -05:00
7f59bed528
[hb-cairo] Round foreground color
2023-01-20 16:42:55 -07:00
76b059cadb
[hb-cairo] Simplify foreground color fetching
2023-01-20 16:41:47 -07:00
f70f7194de
[hb-cairo] Remove unused prototype
2023-01-20 16:30:59 -07:00
61719a8350
[hb-view] Support specifying color indices again
2023-01-20 15:52:09 -07:00
30058f489a
[instancer] trim .notdef outline data after recalc bounds
...
If outline data present, we use it to recalc bounds and then trim it
accordingly
2023-01-20 14:50:03 -08:00
0de7f83a9f
[instancer] update maxp table
2023-01-20 14:50:03 -08:00
94c390d078
[instancer] update head table
2023-01-20 14:50:03 -08:00
2ecb1c31e9
[instancer] always recalculate bounds when --instance option enabled
...
But don't recompile glyph bytes if pinned at default
2023-01-20 14:50:03 -08:00
1f948e7fd5
[instancer] store recalculated head/maxp info in subset plan
2023-01-20 14:49:54 -08:00
92122421c9
[instancer] update vhea/hhea tables
2023-01-20 14:48:53 -08:00
ab7c914425
[hb-cairo] Macro shuffle again
2023-01-20 15:43:01 -07:00
4759932bcf
[hb-cairo] Round colors
2023-01-20 15:33:38 -07:00
876675e090
[hb-cairo] Macro shuffling
2023-01-20 15:31:43 -07:00
68a73e436a
[hb-cairo] Macro hygiene
2023-01-20 15:30:07 -07:00
fcb5111cc6
[doc] Fix gtk-doc warning
2023-01-21 00:24:50 +02:00
574d9344dc
[hb-cairo] Fix build with old cairo
2023-01-20 15:22:50 -07:00
4f19c3b3be
[hb-cairo] Move color-cache to scaled-font
2023-01-20 15:15:52 -07:00
beba43eebe
[hb-cairo] Fix color cache on not-found
2023-01-20 15:02:24 -07:00
cc9b55c794
[hb-cairo] Add a color cache
2023-01-20 14:57:57 -07:00
eb00088bcf
[paint] Docs
2023-01-20 13:57:39 -07:00
f21b15dcc3
[hb-view] Update to alternative cairo custom-palette API
2023-01-20 13:57:39 -07:00
638e0ed4fd
[paint] Overlay custom-palette on top of chosen palette
...
Got to agree this is more ergonomic.
2023-01-20 13:57:39 -07:00
b81db8d3d8
Avoid a compiler warning
2023-01-20 13:57:39 -07:00
4fe6ece425
[cairo] Don't fallback to CPAL if cairo doesn't support custom palette
2023-01-20 13:57:39 -07:00
ab37ade7e4
Hook up custom palettes for cairo
2023-01-20 13:57:39 -07:00
edec8946ed
New API: hb_ot_layout_script_select_language2()
...
Variant that outputs chosen_language.
Not sure why the original API didn't have this. The script
counterpart has.
2023-01-20 09:28:59 -07:00
2fd8e36ea5
[layout] Fix return value of chosen_script when matching fails
2023-01-20 09:09:14 -07:00
d06976e68f
[glyf] Add an edge-count limit
...
Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=55246
2023-01-20 08:21:43 -07:00
0b32cf9023
[COLR] Rename a variable
2023-01-18 21:16:38 -07:00
1d58c8fb0e
[paint] Typo
2023-01-18 21:14:24 -07:00
7aca3b5090
[COLRv1] Hook up custom palette colors
2023-01-18 21:01:44 -07:00
53bd9039e7
[paint] Doc
2023-01-18 20:44:05 -07:00
8afd3ccb10
[paint] Add HB_PAINT_PALETTE_INDEX_CUSTOM
2023-01-18 20:43:10 -07:00
9a2f2b593e
[font] Rename palette to palette_index
2023-01-18 20:39:36 -07:00
bd73314616
[paint] Add API for custom palettes
2023-01-18 20:37:21 -07:00
13c70066de
Shut up gcc 13 -Wdangling-reference
...
Fixes https://github.com/harfbuzz/harfbuzz/issues/4043
2023-01-18 17:29:26 -07:00
eed5d5efdd
[VarComposite] Implement RESET_UNSPECIFIED_AXES
...
Fixes https://github.com/harfbuzz/boring-expansion-spec/issues/79
2023-01-18 14:13:12 -07:00
4300a18b85
[arabic-fallback] Fix ligature code
...
Fixes https://github.com/harfbuzz/harfbuzz/issues/4042
This was broken in 20e9f0b
2023-01-18 10:44:57 -07:00
4d86c65c7a
[hb-cairo] Fix linear-gradient reduce_anchors
2023-01-17 07:35:01 -07:00
92d5ec2f16
[bit-page] Mark len() function static
2023-01-17 05:59:55 -07:00
f38e35ebc3
[cairo] Internal function renames
2023-01-16 18:07:39 -07:00
e4a41f5e16
[COLRv1] Implement recursive clip boxes
...
Tests need update.
hb-view test_glyphs-glyf_colr_1_variable.ttf -u f0c00
2023-01-16 16:27:04 -07:00
f11271cc03
[cairo] Version-check the variations code
2023-01-16 13:14:58 -07:00
a180ae43ce
[bit-set] Use for loop instead of memset for page clear
...
Produces faster code.
2023-01-16 13:06:30 -07:00
ca1de29e0a
[set] Adjust hb_set_copy()
2023-01-16 12:08:11 -07:00
b7f1c30c20
[map] Adjust hb_map_copy()
2023-01-16 12:07:15 -07:00
e0883d60e4
Whitespace
2023-01-16 12:02:21 -07:00
d769e8ae7c
[hb-shape/view] Add --named-instance
2023-01-15 10:58:15 -07:00
99838770ab
[font] Add hb_font_get_var_named_instance()
...
Two new API:
+HB_FONT_NO_VAR_NAMED_INSTANCE
+hb_font_get_var_named_instance
2023-01-15 10:54:01 -07:00
d195e077e9
[font] Remember named_instance index
...
Specially, in hb_font_set_variations() default to the named_instance
for unspecified axes.
Fixes https://github.com/harfbuzz/harfbuzz/issues/1883
2023-01-15 10:44:04 -07:00
d015e9016c
[ms-features] Comment
2023-01-15 09:46:32 -07:00
ea1ee0d4b6
[instance] drop and don't collect lookups from feature variations when fully instancing.
...
This previously incorrectly collected lookups that could be reached via feature variations that are dropped and not activated by the current instance position.
2023-01-14 18:04:24 -07:00
81b942e363
[os2] Comment
2023-01-12 18:42:22 -07:00
9fb9be8d43
[os2] Rewrite a loop
2023-01-12 18:37:45 -07:00
082e5c5def
[os2] Minor add a cast
2023-01-12 18:37:07 -07:00
45fe897e89
[os2] Rename a couple of variables
2023-01-12 18:36:16 -07:00
2dcbf3bd07
[os2] Inline a trivial function
2023-01-12 18:29:16 -07:00
075fe33446
Enable -Wunsafe-loop-optimizations
...
I don't get any.
2023-01-12 17:14:42 -07:00
ed023f66df
Enable -Wformat-signedness
...
And fix the codebase.
2023-01-12 17:04:24 -07:00
7b5f0dd3a8
Move hb-ot-name-language-static.hh out of hb-static.cc
...
Since hb-static.cc is used by libharfbuzz-cairo as well.
2023-01-12 15:05:19 -07:00
449f6df762
[mutex] Add constructor/destructor
...
Use in one place.
2023-01-12 14:52:00 -07:00
8e71f7e8ed
[subset-accelerator] Streamline constructor/destructor
2023-01-12 14:46:44 -07:00
c4c646280f
[unicode] Adjust error message
2023-01-12 13:58:46 -07:00
0d66529135
[bit-page] Minor simplify bit-page specification
2023-01-12 13:14:24 -07:00
32866a331e
[subset-input] Simplify destruction
2023-01-12 13:03:26 -07:00
d5b826fd09
[subset-input] Fix leak
2023-01-12 12:55:47 -07:00
c52810529e
[subset-plan] Move construction to constructor
2023-01-12 12:53:46 -07:00
26d69e059d
[subset-input] Move constructor to .cc file
2023-01-12 12:46:44 -07:00
a916ad9ea9
[subset-input] Move initialization to constructor
2023-01-12 12:44:16 -07:00
875f9f6f22
[subset-input] Use shared_ptr for sets
2023-01-12 12:37:48 -07:00
ef005bc82a
[subset-input] Fix destruction
...
Ouch! Object was already destroyed at that point before.
2023-01-12 12:09:50 -07:00
c60c5995bb
Merge pull request #4028 from harfbuzz/mvar-instancing
...
[instancer] Add MVAR values to OS/2
2023-01-12 11:59:51 -07:00
cfb672f1e5
[glyf] Revert sign of advance widths back
2023-01-12 11:59:18 -07:00
8c83de1396
[aat] Initialize values
2023-01-12 10:44:08 -07:00
ca19091549
[hhea/vhea] Add MVAR during instancing
2023-01-11 15:36:22 -07:00
f455000138
[post] Add MVAR to subsetting
2023-01-11 15:36:22 -07:00
9dc3e785aa
[instancer] Add MVAR values to OS/2
2023-01-11 15:36:22 -07:00
e78a68bf46
[subset-input] Don't RETAIN_GIDs in keep-everything
2023-01-11 15:34:11 -07:00
d675f0d4f2
Merge pull request #4023 from harfbuzz/aat-features2
...
[aat] Support feature ranges
2023-01-11 15:06:31 -07:00
1135f0b8cc
Another try at fixing arm build
2023-01-11 13:45:16 -07:00
527e2d7ce2
[gobject] Add another value type hb_ot_var_axis_info
2023-01-11 13:41:44 -07:00
8206569d63
[map] Remove hashmap create/destroy/vtable
...
Unused now.
2023-01-11 13:24:50 -07:00
1426f1c8ea
[subset-plan] Simplify name_table_overrides allocation
2023-01-11 13:23:34 -07:00
5cab4a55d2
[subset-input] Simplify axes_location allocation
2023-01-11 13:21:57 -07:00
df721e0562
[gobject] Add draw/paint value types
2023-01-11 12:50:52 -07:00
41352c08b8
[hmtx] Fix types
2023-01-11 12:42:14 -07:00
4e7c803969
[subset-plan] Simplify name_table_overrides allocation
2023-01-11 12:38:26 -07:00
65d3db375c
[subset-plan] Simplify user_axes_location allocation
2023-01-11 12:36:54 -07:00
60418fcb95
[subset-plan] Simplify axes_index_map allocation
2023-01-11 12:33:25 -07:00
8265277c2e
[subset-plan] Simplify axes_location allocation
2023-01-11 12:32:04 -07:00
d54902c659
[subset-plan] Simplify axes_old_index_tag_map allocation
2023-01-11 12:29:25 -07:00
9f4c8fb700
[subset-plan] Minor move code around
2023-01-11 12:28:18 -07:00
a34a204bf7
[subset-plan] Simplify unicodes allocation
2023-01-11 12:27:19 -07:00
75b33cb04b
[subset-plan] Simplify hmtx_map / vmtx_map allocation
2023-01-11 12:24:35 -07:00
33ce3a0d44
[subset] Minor adjust a couple types
2023-01-11 12:21:26 -07:00
67eefebf8d
[subset-plan] Simplify user_axes_location destruction
2023-01-11 11:44:09 -07:00
b2007abff7
[subset-plan] Simplify glyph_map_gsub allocation
2023-01-11 11:27:22 -07:00
bd4b040e7f
[shape-plan] Simplify glyphs_requested allocation
2023-01-11 11:23:48 -07:00
c51d33685d
[subset-plan] Simplify no_subset_tables allocation
2023-01-11 11:22:22 -07:00
999be72135
[subset-plan] Simplify drop_tables allocation
2023-01-11 11:21:17 -07:00
b33eb9ecfc
[subset-plan] Simplify layout_variation_idx_delta_map allocation
2023-01-11 11:20:04 -07:00
9c45d98f73
[subset-plan] Simplify colr_palettes allocation
2023-01-11 11:16:18 -07:00
b74a265196
[subset-plan] Simplify colrv1_layers allocation
2023-01-11 11:15:15 -07:00
89905368ca
[subset-plan] Simplify sanitized_table_cache allocation
2023-01-11 11:13:49 -07:00
9e24873c1e
[subset-plan] Simplify gsub/gpos_feature_substitutes_map allocation
2023-01-11 11:12:07 -07:00
01208c7c02
[subset-plan] Simplify gsub/gpos_feature_record_cond_idx_map allocation
2023-01-11 11:10:28 -07:00
06039db080
[subset-plan] Simplify gsub_langsys and gpos_langsys allocation
2023-01-11 11:07:31 -07:00
5fc91de2c0
[shape-plan] Simplify _glyphset_colred allocation
2023-01-11 11:04:17 -07:00
efafe7aa3b
[subset-plan] Simplify _glyphset_mathed allocation
2023-01-11 11:03:19 -07:00
113a1700df
[subset-plan] Simplify _glyphset_gsub allocation
2023-01-11 11:01:11 -07:00
4a9268f280
[subset-plan] Simplify _glyphset allocation
2023-01-11 11:00:02 -07:00
1a00ab69ec
[subset-plan] Simplify gsub_lookups and gpos_lookups allocation
2023-01-11 10:56:16 -07:00
1a716bad03
[subset-plan] Simplify gsub_features and gpos_features allocation
2023-01-11 10:51:48 -07:00
78aa9f1e9c
[subset-plan] Simplify name_ids allocation
2023-01-11 10:47:40 -07:00
cfb48f91da
[subset-plan] Simplify name_languages allocation
2023-01-11 10:45:26 -07:00
e4ca0fe436
[subset-plan] Simplify layout_features allocation
2023-01-11 10:43:01 -07:00
4de66eec57
[subset-plan] Simplify layout_scripts allocation
2023-01-11 10:40:54 -07:00
5f51dd276b
[ft-colr] Minor use false instead of 0
2023-01-10 22:57:07 -07:00
f84a8e3289
[ft-colr] Comment
2023-01-10 22:43:42 -07:00
bf16dad55a
[paint-extents] Return unbounded on memory allocation failure
2023-01-10 17:29:25 -07:00
3e1c524e64
[bit-page] Comment
2023-01-10 17:18:34 -07:00
626def03f8
[hmtx] Remove TODO items
2023-01-10 17:12:50 -07:00
adf0bd6dcd
[test-map] Add a test
2023-01-10 17:05:19 -07:00
4fd0354067
[font] Docs
2023-01-10 14:32:08 -07:00
bfd7548e24
[aat] Optimize feature-range application
2023-01-10 13:31:58 -07:00
dd42939e31
[aat] Reduce unsafe_to_concat calls
2023-01-10 13:23:19 -07:00
fecce62a45
[ft] Docs
2023-01-10 13:13:43 -07:00
cb509d9c89
[face] Docs
2023-01-10 13:11:48 -07:00
8a2efbd8a1
[upem] More docs
2023-01-10 13:10:36 -07:00
ccffce58cc
[scale] More docs
2023-01-10 13:09:30 -07:00
c4580d8670
[scale] More docs
2023-01-10 12:56:02 -07:00
f0e695a3a9
[scale] Comment
2023-01-10 12:55:17 -07:00
Behdad Esfahbod
Matthias Clasen
Qunxin Liu
Garret Rieger
Khaled Hosny
Matthias Clasen