void SkPictureRecord::addPicture(SkPicture& picture) {
int index = fPictureRefs.find(&picture);
if (index < 0) { // not found
index = fPictureRefs.count();
*fPictureRefs.append() = &picture;
picture.ref();
}
// follow the convention of recording a 1-based index
addInt(index + 1);
}
