16     size_t          fUsed;  member
21     size_t avail() const { return fCapacity - fUsed; }  in avail()
22     void* availData() { return (char*)this->startData() + fUsed; }  in availData()
28         block->fUsed = 0;  in Alloc()
38         fUsed += amount;  in append()
46         SkASSERT(fUsed <= fCapacity);  in validate()
72         head->fBlock.fUsed = 0;  in Alloc()
105             totalUsed += block->fUsed;  in validate()
117 SkROBuffer::SkROBuffer(const SkBufferHead* head, size_t used) : fHead(head), fUsed(used) {  in SkROBuffer()
129         fHead->validate(fUsed);  in ~SkROBuffer()
141         fRemaining = buffer->fUsed;  in reset()
153     return SkTMin(fBlock->fUsed, fRemaining);  in size()
216     fTail->fUsed += length;  in append()