We need to store some data as c header file, so that we can then include it in the build bundle and shipped with any applications that use it.
To do that we use
xxd -i data.png > data.h
This works well, but the data.h files is now as 6X large as the data.png file. That means, if the data.png is 4MB, the data.h would be 24MB.
May I ask if there is a way to compress the data.h file to a smaller size?
Thanks!
--- update ---
Thank you all for the suggestions! I think I could clarify the need here to provide more context!
- the ideal way for us to consume the file is we can open it as input stream like
std::ifstream is;
infile.open("data.png");
somefunc(is) // a api function that takes std::istream as input
p.s. the file is not png file but a scripted model, I use png as example because I find it as a more generic problem of "xxd -i"
we didn't find a way to make it available as a file to be read, as the file system the codes actually searching would be in Android/iOS. (only files on the mobile system are available and the source codes would be zipped in the .so file)
with the header file we can do something like
std::stringstream is;
is.write((char*)data_byte_array, data_byte_array_len)
somefunc(is)
The source codes would end up built as a lib.so. In our tests, A 70KB data.h would end up adding 45KB to the lib.so.
CodePudding user response：
May I ask if there is a way to compress the data.h file to a smaller size?
You can use any lossless compression algorithm. The gzip program is a common default choice on POSIX systems.
CodePudding user response：
You can compile and binary file into an object file using objcopy. See C/C with GCC: Statically add resource files to executable/library for more details