bool SkGPipeCanvas::shuttleBitmap(const SkBitmap& bm, int32_t slot) {
    SkASSERT(shouldFlattenBitmaps(fFlags));
    SkWriteBuffer buffer;
    buffer.setNamedFactoryRecorder(fFactorySet);
    buffer.writeBitmap(bm);
    this->flattenFactoryNames();
    size_t size = buffer.bytesWritten();
    if (this->needOpBytes(size)) {
        this->writeOp(kDef_Bitmap_DrawOp, 0, slot);
        void* dst = static_cast<void*>(fWriter.reserve(size));
        buffer.writeToMemory(dst);
        return true;
    }
    return false;
}