1/**
2 * Copyright (c) 2006-2023 LOVE Development Team
3 *
4 * This software is provided 'as-is', without any express or implied
5 * warranty. In no event will the authors be held liable for any damages
6 * arising from the use of this software.
7 *
8 * Permission is granted to anyone to use this software for any purpose,
9 * including commercial applications, and to alter it and redistribute it
10 * freely, subject to the following restrictions:
11 *
12 * 1. The origin of this software must not be misrepresented; you must not
13 * claim that you wrote the original software. If you use this software
14 * in a product, an acknowledgment in the product documentation would be
15 * appreciated but is not required.
16 * 2. Altered source versions must be plainly marked as such, and must not be
17 * misrepresented as being the original software.
18 * 3. This notice may not be removed or altered from any source distribution.
19 **/
20
21#include "common/version.h"
22#include "common/runtime.h"
23#include "modules/love/love.h"
24#include <SDL.h>
25
26#ifdef LOVE_BUILD_EXE
27
28// Lua
29extern "C" {
30 #include <lua.h>
31 #include <lualib.h>
32 #include <lauxlib.h>
33}
34
35#ifdef LOVE_WINDOWS
36#include <windows.h>
37#endif // LOVE_WINDOWS
38
39#ifdef LOVE_MACOSX
40#include "common/macosx.h"
41#include <unistd.h>
42#endif // LOVE_MACOSX
43
44#ifdef LOVE_IOS
45#include "common/ios.h"
46#endif
47
48#ifdef LOVE_WINDOWS
49extern "C"
50{
51
52// Prefer the higher performance GPU on Windows systems that use nvidia Optimus.
53// http://developer.download.nvidia.com/devzone/devcenter/gamegraphics/files/OptimusRenderingPolicies.pdf
54// TODO: Re-evaluate in the future when the average integrated GPU in Optimus
55// systems is less mediocre?
56LOVE_EXPORT DWORD NvOptimusEnablement = 1;
57
58// Same with AMD GPUs.
59// https://community.amd.com/thread/169965
60LOVE_EXPORT DWORD AmdPowerXpressRequestHighPerformance = 1;
61}
62#endif // LOVE_WINDOWS
63
64#ifdef LOVE_LEGENDARY_APP_ARGV_HACK
65
66#include <vector>
67
68// Explicitly instantiate std::vector<std::string> to work around linker issues
69// with libc++ when symbols are hidden-by-default.
70// https://stackoverflow.com/a/48273604
71template class std::vector<std::string>;
72
73static void get_app_arguments(int argc, char **argv, int &new_argc, char **&new_argv)
74{
75 std::vector<std::string> temp_argv;
76 for (int i = 0; i < argc; i++)
77 {
78 // Don't copy -psn_xxx argument from argv.
79 if (i == 0 || strncmp(argv[i], "-psn_", 5) != 0)
80 temp_argv.push_back(std::string(argv[i]));
81 }
82
83 // If it exists, add the love file in love.app/Contents/Resources/ to argv.
84 std::string loveResourcesPath;
85 bool fused = true;
86#if defined(LOVE_MACOSX)
87 loveResourcesPath = love::macosx::getLoveInResources();
88#elif defined(LOVE_IOS)
89 loveResourcesPath = love::ios::getLoveInResources(fused);
90#endif
91 if (!loveResourcesPath.empty())
92 {
93 std::vector<std::string>::iterator it = temp_argv.begin();
94 it = temp_argv.insert(it + 1, loveResourcesPath);
95
96 // Run in pseudo-fused mode.
97 if (fused)
98 temp_argv.insert(it + 1, std::string("--fused"));
99 }
100#ifdef LOVE_MACOSX
101 else
102 {
103 // Check for a drop file string, if the app wasn't launched in a
104 // terminal. Checking for the terminal is a pretty big hack, but works
105 // around an issue where OS X will switch Spaces if the terminal
106 // launching love is in its own full-screen Space.
107 if (!isatty(STDIN_FILENO))
108 {
109 // Static to keep the same value after love.event.equit("restart").
110 static std::string dropfilestr = love::macosx::checkDropEvents();
111 if (!dropfilestr.empty())
112 temp_argv.insert(temp_argv.begin() + 1, dropfilestr);
113 }
114 }
115#endif
116
117 // Copy temp argv vector to new argv array.
118 new_argc = (int) temp_argv.size();
119 new_argv = new char *[new_argc+1];
120
121 for (int i = 0; i < new_argc; i++)
122 {
123 new_argv[i] = new char[temp_argv[i].length() + 1];
124 strcpy(new_argv[i], temp_argv[i].c_str());
125 }
126
127 new_argv[new_argc] = NULL;
128}
129
130#endif // LOVE_LEGENDARY_APP_ARGV_HACK
131
132static int love_preload(lua_State *L, lua_CFunction f, const char *name)
133{
134 lua_getglobal(L, "package");
135 lua_getfield(L, -1, "preload");
136 lua_pushcfunction(L, f);
137 lua_setfield(L, -2, name);
138 lua_pop(L, 2);
139 return 0;
140}
141
142enum DoneAction
143{
144 DONE_QUIT,
145 DONE_RESTART,
146};
147
148static DoneAction runlove(int argc, char **argv, int &retval)
149{
150 // Oh, you just want the version? Okay!
151 if (argc > 1 && strcmp(argv[1], "--version") == 0)
152 {
153#ifdef LOVE_LEGENDARY_CONSOLE_IO_HACK
154 const char *err = nullptr;
155 love_openConsole(err);
156#endif
157 printf("LOVE %s (%s)\n", love_version(), love_codename());
158 retval = 0;
159 return DONE_QUIT;
160 }
161
162 // Create the virtual machine.
163 lua_State *L = luaL_newstate();
164 luaL_openlibs(L);
165
166 // LuaJIT-specific setup needs to be done as early as possible - before
167 // get_app_arguments because that loads external library code. This is also
168 // loaded inside require("love"). Note that it doesn't use the love table.
169 love_preload(L, luaopen_love_jitsetup, "love.jitsetup");
170 lua_getglobal(L, "require");
171 lua_pushstring(L, "love.jitsetup");
172 lua_call(L, 1, 0);
173
174#ifdef LOVE_LEGENDARY_APP_ARGV_HACK
175 int hack_argc = 0;
176 char **hack_argv = nullptr;
177 get_app_arguments(argc, argv, hack_argc, hack_argv);
178 argc = hack_argc;
179 argv = hack_argv;
180#endif // LOVE_LEGENDARY_APP_ARGV_HACK
181
182 // Add love to package.preload for easy requiring.
183 love_preload(L, luaopen_love, "love");
184
185 // Add command line arguments to global arg (like stand-alone Lua).
186 {
187 lua_newtable(L);
188
189 if (argc > 0)
190 {
191 lua_pushstring(L, argv[0]);
192 lua_rawseti(L, -2, -2);
193 }
194
195 lua_pushstring(L, "embedded boot.lua");
196 lua_rawseti(L, -2, -1);
197
198 for (int i = 1; i < argc; i++)
199 {
200 lua_pushstring(L, argv[i]);
201 lua_rawseti(L, -2, i);
202 }
203
204 lua_setglobal(L, "arg");
205 }
206
207 // require "love"
208 lua_getglobal(L, "require");
209 lua_pushstring(L, "love");
210 lua_call(L, 1, 1); // leave the returned table on the stack.
211
212 // Add love._exe = true.
213 // This indicates that we're running the standalone version of love, and not
214 // the library version.
215 {
216 lua_pushboolean(L, 1);
217 lua_setfield(L, -2, "_exe");
218 }
219
220 // Pop the love table returned by require "love".
221 lua_pop(L, 1);
222
223 // require "love.boot" (preloaded when love was required.)
224 lua_getglobal(L, "require");
225 lua_pushstring(L, "love.boot");
226 lua_call(L, 1, 1);
227
228 // Turn the returned boot function into a coroutine and call it until done.
229 lua_newthread(L);
230 lua_pushvalue(L, -2);
231 int stackpos = lua_gettop(L);
232 int nres;
233 while (love::luax_resume(L, 0, &nres) == LUA_YIELD)
234#if LUA_VERSION_NUM >= 504
235 lua_pop(L, nres);
236#else
237 lua_pop(L, lua_gettop(L) - stackpos);
238#endif
239
240 retval = 0;
241 DoneAction done = DONE_QUIT;
242
243 // if love.boot() returns "restart", we'll start up again after closing this
244 // Lua state.
245 if (lua_type(L, -1) == LUA_TSTRING && strcmp(lua_tostring(L, -1), "restart") == 0)
246 done = DONE_RESTART;
247 if (lua_isnumber(L, -1))
248 retval = (int) lua_tonumber(L, -1);
249
250 lua_close(L);
251
252#if defined(LOVE_LEGENDARY_APP_ARGV_HACK) && !defined(LOVE_IOS)
253 if (hack_argv)
254 {
255 for (int i = 0; i<hack_argc; ++i)
256 delete [] hack_argv[i];
257 delete [] hack_argv;
258 }
259#endif // LOVE_LEGENDARY_APP_ARGV_HACK
260
261 return done;
262}
263
264int main(int argc, char **argv)
265{
266 if (strcmp(LOVE_VERSION_STRING, love_version()) != 0)
267 {
268 printf("Version mismatch detected!\nLOVE binary is version %s\n"
269 "LOVE library is version %s\n", LOVE_VERSION_STRING, love_version());
270 return 1;
271 }
272
273 int retval = 0;
274 DoneAction done = DONE_QUIT;
275
276 do
277 {
278 done = runlove(argc, argv, retval);
279
280#ifdef LOVE_IOS
281 // on iOS we should never programmatically exit the app, so we'll just
282 // "restart" when that is attempted. Games which use threads might cause
283 // some issues if the threads aren't cleaned up properly...
284 done = DONE_RESTART;
285#endif
286 } while (done != DONE_QUIT);
287
288#ifdef LOVE_ANDROID
289 SDL_Quit();
290#endif
291
292 return retval;
293}
294
295#endif // LOVE_BUILD_EXE
296