208 lines
6.2 KiB
C
208 lines
6.2 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_internal.h"
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#ifdef SDL_VIDEO_DRIVER_X11
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#define DEBUG_DYNAMIC_X11 0
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#include "SDL_x11dyn.h"
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#if DEBUG_DYNAMIC_X11
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#include <stdio.h>
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#endif
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#ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC
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typedef struct
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{
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SDL_SharedObject *lib;
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const char *libname;
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} x11dynlib;
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#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT
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#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT NULL
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#endif
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#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XCURSOR
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#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XCURSOR NULL
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#endif
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#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT2
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#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT2 NULL
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#endif
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#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XFIXES
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#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XFIXES NULL
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#endif
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#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR
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#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR NULL
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#endif
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#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XSS
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#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XSS NULL
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#endif
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#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XTEST
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#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XTEST NULL
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#endif
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static x11dynlib x11libs[] = {
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{ NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC },
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{ NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT },
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{ NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XCURSOR },
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{ NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT2 },
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{ NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XFIXES },
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{ NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR },
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{ NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XSS },
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{ NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XTEST }
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};
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static void *X11_GetSym(const char *fnname, int *pHasModule)
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{
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int i;
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void *fn = NULL;
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for (i = 0; i < SDL_arraysize(x11libs); i++) {
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if (x11libs[i].lib) {
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fn = SDL_LoadFunction(x11libs[i].lib, fnname);
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if (fn) {
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break;
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}
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}
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}
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#if DEBUG_DYNAMIC_X11
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if (fn)
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printf("X11: Found '%s' in %s (%p)\n", fnname, x11libs[i].libname, fn);
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else
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printf("X11: Symbol '%s' NOT FOUND!\n", fnname);
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#endif
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if (!fn) {
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*pHasModule = 0; // kill this module.
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}
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return fn;
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}
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#endif // SDL_VIDEO_DRIVER_X11_DYNAMIC
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// Define all the function pointers and wrappers...
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#define SDL_X11_SYM(rc, fn, params) SDL_DYNX11FN_##fn X11_##fn = NULL;
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#include "SDL_x11sym.h"
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/* These SDL_X11_HAVE_* flags are here whether you have dynamic X11 or not. */
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#define SDL_X11_MODULE(modname) int SDL_X11_HAVE_##modname = 0;
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#include "SDL_x11sym.h"
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static int x11_load_refcount = 0;
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void SDL_X11_UnloadSymbols(void)
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{
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// Don't actually unload if more than one module is using the libs...
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if (x11_load_refcount > 0) {
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if (--x11_load_refcount == 0) {
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#ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC
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int i;
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#endif
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// set all the function pointers to NULL.
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#define SDL_X11_MODULE(modname) SDL_X11_HAVE_##modname = 0;
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#define SDL_X11_SYM(rc, fn, params) X11_##fn = NULL;
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#include "SDL_x11sym.h"
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#ifdef X_HAVE_UTF8_STRING
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X11_XCreateIC = NULL;
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X11_XGetICValues = NULL;
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X11_XSetICValues = NULL;
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X11_XVaCreateNestedList = NULL;
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#endif
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#ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC
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for (i = 0; i < SDL_arraysize(x11libs); i++) {
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if (x11libs[i].lib) {
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SDL_UnloadObject(x11libs[i].lib);
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x11libs[i].lib = NULL;
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}
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}
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#endif
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}
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}
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}
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// returns non-zero if all needed symbols were loaded.
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bool SDL_X11_LoadSymbols(void)
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{
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bool result = true; // always succeed if not using Dynamic X11 stuff.
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// deal with multiple modules (dga, x11, etc) needing these symbols...
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if (x11_load_refcount++ == 0) {
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#ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC
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int i;
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int *thismod = NULL;
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for (i = 0; i < SDL_arraysize(x11libs); i++) {
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if (x11libs[i].libname) {
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x11libs[i].lib = SDL_LoadObject(x11libs[i].libname);
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}
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}
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#define SDL_X11_MODULE(modname) SDL_X11_HAVE_##modname = 1; // default yes
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#include "SDL_x11sym.h"
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#define SDL_X11_MODULE(modname) thismod = &SDL_X11_HAVE_##modname;
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#define SDL_X11_SYM(rc, fn, params) X11_##fn = (SDL_DYNX11FN_##fn)X11_GetSym(#fn, thismod);
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#include "SDL_x11sym.h"
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#ifdef X_HAVE_UTF8_STRING
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X11_XCreateIC = (SDL_DYNX11FN_XCreateIC)
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X11_GetSym("XCreateIC", &SDL_X11_HAVE_UTF8);
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X11_XGetICValues = (SDL_DYNX11FN_XGetICValues)
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X11_GetSym("XGetICValues", &SDL_X11_HAVE_UTF8);
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X11_XSetICValues = (SDL_DYNX11FN_XSetICValues)
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X11_GetSym("XSetICValues", &SDL_X11_HAVE_UTF8);
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X11_XVaCreateNestedList = (SDL_DYNX11FN_XVaCreateNestedList)
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X11_GetSym("XVaCreateNestedList", &SDL_X11_HAVE_UTF8);
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#endif
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if (SDL_X11_HAVE_BASEXLIB) {
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// all required symbols loaded.
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SDL_ClearError();
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} else {
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// in case something got loaded...
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SDL_X11_UnloadSymbols();
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result = false;
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}
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#else // no dynamic X11
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#define SDL_X11_MODULE(modname) SDL_X11_HAVE_##modname = 1; // default yes
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#define SDL_X11_SYM(rc, fn, params) X11_##fn = (SDL_DYNX11FN_##fn)fn;
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#include "SDL_x11sym.h"
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#ifdef X_HAVE_UTF8_STRING
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X11_XCreateIC = XCreateIC;
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X11_XGetICValues = XGetICValues;
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X11_XSetICValues = XSetICValues;
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X11_XVaCreateNestedList = XVaCreateNestedList;
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#endif
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#endif
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}
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return result;
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}
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#endif // SDL_VIDEO_DRIVER_X11
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