| all: lib run | |
| lib: | |
| g++ -shared -fPIC -o libhello.so libhello.cpp hello.cpp | |
| run: | |
| luajit main.lua | |
| clean: | |
| rm *.so |
| // gcc sdl2gles2gears.c $(sdl2-config --cflags --libs) -lm -lGLESv2 -ogles && ./gles # basilar compile and run (works for me) | |
| /* | |
| * Copyright (C) 1999-2001 Brian Paul All Rights Reserved. | |
| * | |
| * Permission is hereby granted, free of charge, to any person obtaining a | |
| * copy of this software and associated documentation files (the "Software"), | |
| * to deal in the Software without restriction, including without limitation | |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| // To compile with gcc: (tested on Ubuntu 14.04 64bit): | |
| // g++ sdl2_opengl.cpp -lSDL2 -lGL | |
| // To compile with msvc: (tested on Windows 7 64bit) | |
| // cl sdl2_opengl.cpp /I C:\sdl2path\include /link C:\path\SDL2.lib C:\path\SDL2main.lib /SUBSYSTEM:CONSOLE /NODEFAULTLIB:libcmtd.lib opengl32.lib | |
| #include <stdio.h> | |
| #include <stdint.h> | |
| #include <assert.h> | |
| #include <SDL2/SDL.h> | |
| #include <SDL2/SDL_opengl.h> |
| -- load the luajit ffi module | |
| local ffi = require "ffi" | |
| -- Parse the C API header | |
| -- It's generated with: | |
| -- | |
| -- echo '#include <SDL.h>' > stub.c | |
| -- gcc -I /usr/include/SDL -E stub.c | grep -v '^#' > ffi_SDL.h | |
| -- | |
| ffi.cdef(io.open('ffi_SDL.h', 'r'):read('*a')) | |
| -- Load the shared object |
Windowless Lua does not create a console window.
It runs invisible for user.
Please note that "windowless" means "doesn't have stdin, stdout and stderr".
You will not be able to see error message.
io.read(), io.write() and print() in your Lua script will not work.
But in some situations invisible Lua is just what you need very much.
For example, to avoid a GUI application (especially a game) to lose input focus when some background Lua script is started.
| -- sudo luarocks install luasocket | |
| -- sudo apt install lua-socket | |
| local socket=require("socket") | |
| local server=assert(socket.bind("localhost",9999)) | |
| server:settimeout(0) -- for server:accept() | |
| local ip,port=server:getsockname() | |
| print("ncat".." "..ip.." "..port) |