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Third Party Harfbuzz
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10b1104d
T
Third Party Harfbuzz
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10b1104d
编写于
8月 11, 2014
作者:
B
Behdad Esfahbod
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差异文件
[coretext] Use CFRunStatus
Assert that all runs had expected direction, and take hint for non-monotone clusters.
上级
fd1a6aa8
变更
1
隐藏空白更改
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并排
Showing
1 changed file
with
15 addition
and
2 deletion
+15
-2
src/hb-coretext.cc
src/hb-coretext.cc
+15
-2
未找到文件。
src/hb-coretext.cc
浏览文件 @
10b1104d
...
...
@@ -740,12 +740,17 @@ retry:
unsigned
int
num_runs
=
CFArrayGetCount
(
glyph_runs
);
buffer
->
len
=
0
;
uint32_t
status_and
=
~
0
,
status_or
=
0
;
const
CFRange
range_all
=
CFRangeMake
(
0
,
0
);
for
(
unsigned
int
i
=
0
;
i
<
num_runs
;
i
++
)
{
CTRunRef
run
=
static_cast
<
CTRunRef
>
(
CFArrayGetValueAtIndex
(
glyph_runs
,
i
));
CTRunStatus
run_status
=
CTRunGetStatus
(
run
);
status_or
|=
run_status
;
status_and
&=
run_status
;
DEBUG_MSG
(
CORETEXT
,
run
,
"CTRunStatus: %x"
,
run_status
);
/* CoreText does automatic font fallback (AKA "cascading") for characters
* not supported by the requested font, and provides no way to turn it off,
...
...
@@ -863,6 +868,11 @@ retry:
}
}
/* Make sure all runs had the expected direction. */
bool
backward
=
HB_DIRECTION_IS_BACKWARD
(
buffer
->
props
.
direction
);
assert
(
bool
(
status_and
&
kCTRunStatusRightToLeft
)
==
backward
);
assert
(
bool
(
status_or
&
kCTRunStatusRightToLeft
)
==
backward
);
buffer
->
clear_positions
();
unsigned
int
count
=
buffer
->
len
;
...
...
@@ -878,12 +888,15 @@ retry:
/* Fix up clusters so that we never return out-of-order indices;
* if core text has reordered glyphs, we'll merge them to the
* beginning of the reordered cluster.
* beginning of the reordered cluster. CoreText is nice enough
* to tell us whenever it has produced nonmonotonic results...
* Note that we assume the input clusters were nonmonotonic to
* begin with.
*
* This does *not* mean we'll form the same clusters as Uniscribe
* or the native OT backend, only that the cluster indices will be
* monotonic in the output buffer. */
if
(
count
>
1
)
if
(
count
>
1
&&
(
status_or
&
kCTRunStatusNonMonotonic
)
)
{
hb_glyph_info_t
*
info
=
buffer
->
info
;
if
(
HB_DIRECTION_IS_FORWARD
(
buffer
->
props
.
direction
))
...
...
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