24     , fPos(0)  in SkDWriteFontFileStream()
41         if (fPos + size > fileSize) {  in read()
42             size_t skipped = fileSize - fPos;  in read()
43             fPos = fileSize;  in read()
46             fPos += size;  in read()
53     hr = fFontFileStream->ReadFileFragment(&start, fPos, size, &fragmentLock);  in read()
57         fPos += size;  in read()
63     if (fPos + size <= fileSize) {  in read()
68     size_t read = fileSize - fPos;  in read()
69     hr = fFontFileStream->ReadFileFragment(&start, fPos, read, &fragmentLock);  in read()
73         fPos = fileSize;  in read()
81     return fPos == this->getLength();  in isAtEnd()
85     fPos = 0;  in rewind()
94     return fPos;  in getPosition()
99     fPos = (position > length) ? length : position;  in seek()
104     return seek(fPos + offset);  in move()
109     that->seek(fPos);  in onFork()