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[OTLayout] Make hb_ot_layout_get_size_params() do some checks

This commit is contained in:
Behdad Esfahbod 2012-12-11 14:30:57 -05:00
parent 875a5cbc9c
commit 372fe2b67b
1 changed files with 11 additions and 1 deletions
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12
src/hb-ot-layout.cc
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@ -647,6 +647,7 @@ hb_ot_layout_get_size_params (hb_face_t *face,
unsigned int *range_start, /* OUT. May be NULL */
unsigned int *range_end /* OUT. May be NULL */)
{
bool ret = false;
const OT::GPOS &gpos = _get_gpos (face);
unsigned int num_features = gpos.get_feature_count ();
@ -658,7 +659,14 @@ hb_ot_layout_get_size_params (hb_face_t *face,
const OT::FeatureParamsSize &params = f.get_feature_params ().u.size;
#define PARAM(a, A) if (a) *a = params.A
if (!params.designSize)
goto zero_all;
PARAM (design_size, designSize);
if (!params.subfamilyID)
{
ret = true;
goto zero_most;
};
PARAM (subfamily_id, subfamilyID);
PARAM (subfamily_name_id, subfamilyNameID);
PARAM (range_start, rangeStart);
@ -670,12 +678,14 @@ hb_ot_layout_get_size_params (hb_face_t *face,
}
#define PARAM(a, A) if (a) *a = 0
zero_all:
PARAM (design_size, designSize);
zero_most:
PARAM (subfamily_id, subfamilyID);
PARAM (subfamily_name_id, subfamilyNameID);
PARAM (range_start, rangeStart);
PARAM (range_end, rangeEnd);
#undef PARAM
return false;
return ret;
}