writeDataToBuf    365 modules/imgcodecs/src/grfmt_png.cpp                         (png_rw_ptr)writeDataToBuf, (png_flush_ptr)flushBuf);
writeDataToBuf     93 modules/imgcodecs/src/grfmt_png.hpp     static void writeDataToBuf(void* png_ptr, uchar* src, size_t size);