HB_Error harfbuzzSkiaGetTable(void* voidface, const HB_Tag tag, HB_Byte* buffer, HB_UInt* len)
{
FontPlatformData* font = reinterpret_cast<FontPlatformData*>(voidface);
const size_t tableSize = SkFontHost::GetTableSize(font->uniqueID(), tag);
if (!tableSize)
return HB_Err_Invalid_Argument;
// If Harfbuzz specified a NULL buffer then it's asking for the size of the table.
if (!buffer) {
*len = tableSize;
return HB_Err_Ok;
}
if (*len < tableSize)
return HB_Err_Invalid_Argument;
SkFontHost::GetTableData(font->uniqueID(), tag, 0, tableSize, buffer);
return HB_Err_Ok;
}
static hb_blob_t* harfbuzzSkiaGetTable(hb_face_t* face, hb_tag_t tag, void* userData)
{
FontPlatformData* font = reinterpret_cast<FontPlatformData*>(userData);
const size_t tableSize = SkFontHost::GetTableSize(font->uniqueID(), tag);
if (!tableSize)
return 0;
char* buffer = reinterpret_cast<char*>(fastMalloc(tableSize));
if (!buffer)
return 0;
size_t actualSize = SkFontHost::GetTableData(font->uniqueID(), tag, 0, tableSize, buffer);
if (tableSize != actualSize) {
fastFree(buffer);
return 0;
}
return hb_blob_create(const_cast<char*>(buffer), tableSize,
HB_MEMORY_MODE_WRITABLE, buffer, fastFree);
}