readDataFromBuf   163 modules/imgcodecs/src/grfmt_png.cpp                     png_set_read_fn(png_ptr, this, (png_rw_ptr)readDataFromBuf );
readDataFromBuf    69 modules/imgcodecs/src/grfmt_png.hpp     static void readDataFromBuf(void* png_ptr, uchar* dst, size_t size);