40     size_t bytesWritten() const { return fUsed; }  in bytesWritten()
54         fUsed = 0;
61         size_t offset = fUsed;  in reserve()
62         size_t totalRequired = fUsed + size;  in reserve()
66         fUsed = totalRequired;  in reserve()
77         SkASSERT(offset < fUsed);  in readTAt()
88         SkASSERT(offset < fUsed);  in overwriteTAt()
221         fUsed = offset;  in rewindToOffset()
226         memcpy(dst, fData, fUsed);  in flatten()
230         return stream->write(fData, fUsed);  in writeToStream()
248     size_t fUsed;                      // Number of bytes written.  variable