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fix indexed transparency (nw)

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This commit is contained in:
Vas Crabb 2017-08-14 14:30:19 +10:00
parent 3a258ecf9b
commit 4e7f7f5265
1 changed files with 3 additions and 3 deletions
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6
src/lib/util/png.cpp
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@ -680,12 +680,12 @@ public:
}
// upsample transparent pen as well
for (std::uint32_t i = 0; (pnginfo.num_trans >> 1) > i; ++i)
if ((0 == pnginfo.color_type) && pnginfo.trans)
{
std::uint16_t pen(fetch_16bit(&pnginfo.trans[i << 1]));
std::uint16_t pen(fetch_16bit(&pnginfo.trans[0]));
for (unsigned k = 4; pnginfo.bit_depth <= k; k >>= 1)
pen |= pen << k;
put_16bit(&pnginfo.trans[i << 1], pen);
put_16bit(&pnginfo.trans[0], pen);
}
pnginfo.image = std::move(outbuf);