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Fix Device::get_size() calculation

This commit is contained in:
Behdad Esfahbod 2010-04-26 10:07:35 -04:00
parent 66d6eb30eb
commit caff7db93d
1 changed files with 6 additions and 2 deletions
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8
src/hb-ot-layout-common-private.hh
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@ -587,7 +587,7 @@ struct Device
{
unsigned int f = deltaFormat;
if (HB_UNLIKELY (f < 1 || f > 3 || startSize > endSize)) return 3 * USHORT::get_size ();
return 3 * USHORT::get_size () + ((endSize - startSize + (1 << (4 - f)) - 1) >> (4 - f));
return USHORT::get_size () * (4 + ((endSize - startSize) >> (4 - f)));
}
inline bool sanitize (SANITIZE_ARG_DEF) {
@ -598,7 +598,11 @@ struct Device
private:
USHORT startSize; /* Smallest size to correct--in ppem */
USHORT endSize; /* Largest size to correct--in ppem */
USHORT deltaFormat; /* Format of DeltaValue array data: 1, 2, or 3 */
USHORT deltaFormat; /* Format of DeltaValue array data: 1, 2, or 3
* 1 Signed 2-bit value, 8 values per uint16
* 2 Signed 4-bit value, 4 values per uint16
* 3 Signed 8-bit value, 2 values per uint16
*/
USHORT deltaValue[VAR]; /* Array of compressed data */
};
ASSERT_SIZE_VAR (Device, 6, USHORT);