/* external function definitions */
void *
balloc(int size)
{
static char fnc[] = "balloc";
void *p;
if (size <= 0) {
return (void *) (0);
}
if ((p = (void *) malloc((unsigned) size)) == (void *) (0)) {
if (errno == ENOMEM) {
/* GASP!!!! */
gasp(size);
_exit(1);
}
Abort("%t %s(): abort: malloc(%u): %m\n", fnc, (unsigned) size);
}
return p;
}
static bool is_hinted_without_gasp(DWriteFontTypeface* typeface) {
AutoTDWriteTable<SkOTTableMaximumProfile> maxp(typeface->fDWriteFontFace.get());
if (!maxp.fExists) {
return false;
}
if (maxp.fSize < sizeof(SkOTTableMaximumProfile::Version::TT)) {
return false;
}
if (maxp->version.version != SkOTTableMaximumProfile::Version::TT::VERSION) {
return false;
}
if (0 == maxp->version.tt.maxSizeOfInstructions) {
// No hints.
return false;
}
AutoTDWriteTable<SkOTTableGridAndScanProcedure> gasp(typeface->fDWriteFontFace.get());
return !gasp.fExists;
}
/** If the rendering mode for the specified 'size' is gridfit, then place
* the gridfit range into 'range'. Otherwise, leave 'range' alone.
*/
static void expand_range_if_gridfit_only(DWriteFontTypeface* typeface, int size, PPEMRange* range) {
AutoTDWriteTable<SkOTTableGridAndScanProcedure> gasp(typeface->fDWriteFontFace.get());
if (!gasp.fExists) {
return;
}
if (gasp.fSize < sizeof(SkOTTableGridAndScanProcedure)) {
return;
}
if (gasp->version != SkOTTableGridAndScanProcedure::version0 &&
gasp->version != SkOTTableGridAndScanProcedure::version1)
{
return;
}
uint16_t numRanges = SkEndianSwap16(gasp->numRanges);
if (numRanges > 1024 ||
gasp.fSize < sizeof(SkOTTableGridAndScanProcedure) +
sizeof(SkOTTableGridAndScanProcedure::GaspRange) * numRanges)
{
return;
}
const SkOTTableGridAndScanProcedure::GaspRange* rangeTable =
SkTAfter<const SkOTTableGridAndScanProcedure::GaspRange>(gasp.get());
int minPPEM = -1;
for (uint16_t i = 0; i < numRanges; ++i, ++rangeTable) {
int maxPPEM = SkEndianSwap16(rangeTable->maxPPEM);
// Test that the size is in range and the range is gridfit only.
if (minPPEM < size && size <= maxPPEM &&
rangeTable->flags.raw.value == SkOTTableGridAndScanProcedure::GaspRange::behavior::Raw::GridfitMask)
{
range->min = minPPEM + 1;
range->max = maxPPEM;
return;
}
minPPEM = maxPPEM;
}
}
