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usp10: Ignore device tables with invalid delta format. 

Signed-off-by: Nikolay Sivov <nsivov@codeweavers.com>
Signed-off-by: Aric Stewart <aric@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Nikolay Sivov 2017-02-20 02:36:39 +03:00 committed by Alexandre Julliard
parent b6d541cac5
commit fefd15118f
1 changed files with 10 additions and 2 deletions
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12
dlls/usp10/opentype.c
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@ -1492,10 +1492,18 @@ static INT GPOS_get_device_table_value(const OT_DeviceTable *DeviceTable, WORD p
static const WORD mask[3] = {3,0xf,0xff};
if (DeviceTable && ppem >= GET_BE_WORD(DeviceTable->StartSize) && ppem <= GET_BE_WORD(DeviceTable->EndSize))
{
int format = GET_BE_WORD(DeviceTable->DeltaFormat);
WORD format = GET_BE_WORD(DeviceTable->DeltaFormat);
int index = ppem - GET_BE_WORD(DeviceTable->StartSize);
int value;
TRACE("device table, format %i, index %i\n",format, index);
TRACE("device table, format %#x, index %i\n", format, index);
if (format & ~0x3)
{
WARN("invalid delta format %#x\n", format);
return 0;
}
index = index << format;
value = (DeviceTable->DeltaValue[index/sizeof(WORD)] << (index%sizeof(WORD)))&mask[format-1];
TRACE("offset %i, value %i\n",index, value);