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harfbuzz shaper: return early if itemizer returns empty list

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This commit is contained in:
Dane Springmeyer 2014-10-12 15:48:15 -07:00
parent f3eba54078
commit cf2df4f0cc
1 changed files with 4 additions and 1 deletions
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5
include/mapnik/text/harfbuzz_shaper.hpp
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@ -68,8 +68,11 @@ static void shape_text(text_line & line,
unsigned end = line.last_char();
size_t length = end - start;
if (!length) return;
line.reserve(length);
std::list<text_item> const& list = itemizer.itemize(start, end);
if (list.empty()) return;
line.reserve(length);
auto hb_buffer_deleter = [](hb_buffer_t * buffer) { hb_buffer_destroy(buffer);};
const std::unique_ptr<hb_buffer_t, decltype(hb_buffer_deleter)> buffer(hb_buffer_create(),hb_buffer_deleter);