Initial commit

1 files changed, 161 insertions, 0 deletions

diff --git a/contrib/SDL-3.2.8/src/video/kmsdrm/SDL_kmsdrmdyn.c b/contrib/SDL-3.2.8/src/video/kmsdrm/SDL_kmsdrmdyn.c
new file mode 100644
index 0000000..a532cea
--- /dev/null
+++ b/contrib/SDL-3.2.8/src/video/kmsdrm/SDL_kmsdrmdyn.c
@@ -0,0 +1,161 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "SDL_internal.h"
+
+#ifdef SDL_VIDEO_DRIVER_KMSDRM
+
+#define DEBUG_DYNAMIC_KMSDRM 0
+
+#include "SDL_kmsdrmdyn.h"
+
+#ifdef SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC
+
+typedef struct
+{
+    void *lib;
+    const char *libname;
+} kmsdrmdynlib;
+
+#ifndef SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC_GBM
+#define SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC_GBM NULL
+#endif
+
+static kmsdrmdynlib kmsdrmlibs[] = {
+    { NULL, SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC_GBM },
+    { NULL, SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC }
+};
+
+static void *KMSDRM_GetSym(const char *fnname, int *pHasModule, bool required)
+{
+    int i;
+    void *fn = NULL;
+    for (i = 0; i < SDL_arraysize(kmsdrmlibs); i++) {
+        if (kmsdrmlibs[i].lib) {
+            fn = SDL_LoadFunction(kmsdrmlibs[i].lib, fnname);
+            if (fn) {
+                break;
+            }
+        }
+    }
+
+#if DEBUG_DYNAMIC_KMSDRM
+    if (fn)
+        SDL_Log("KMSDRM: Found '%s' in %s (%p)", fnname, kmsdrmlibs[i].libname, fn);
+    else
+        SDL_Log("KMSDRM: Symbol '%s' NOT FOUND!", fnname);
+#endif
+
+    if (!fn && required) {
+        *pHasModule = 0; // kill this module.
+    }
+
+    return fn;
+}
+
+#endif // SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC
+
+// Define all the function pointers and wrappers...
+#define SDL_KMSDRM_MODULE(modname)          int SDL_KMSDRM_HAVE_##modname = 0;
+#define SDL_KMSDRM_SYM(rc, fn, params)      SDL_DYNKMSDRMFN_##fn KMSDRM_##fn = NULL;
+#define SDL_KMSDRM_SYM_CONST(type, name)    SDL_DYNKMSDRMCONST_##name KMSDRM_##name = NULL;
+#define SDL_KMSDRM_SYM_OPT(rc, fn, params)  SDL_DYNKMSDRMFN_##fn KMSDRM_##fn = NULL;
+#include "SDL_kmsdrmsym.h"
+
+static int kmsdrm_load_refcount = 0;
+
+void SDL_KMSDRM_UnloadSymbols(void)
+{
+    // Don't actually unload if more than one module is using the libs...
+    if (kmsdrm_load_refcount > 0) {
+        if (--kmsdrm_load_refcount == 0) {
+#ifdef SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC
+            int i;
+#endif
+
+            // set all the function pointers to NULL.
+#define SDL_KMSDRM_MODULE(modname)          SDL_KMSDRM_HAVE_##modname = 0;
+#define SDL_KMSDRM_SYM(rc, fn, params)      KMSDRM_##fn = NULL;
+#define SDL_KMSDRM_SYM_CONST(type, name)    KMSDRM_##name = NULL;
+#define SDL_KMSDRM_SYM_OPT(rc, fn, params)  KMSDRM_##fn = NULL;
+#include "SDL_kmsdrmsym.h"
+
+#ifdef SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC
+            for (i = 0; i < SDL_arraysize(kmsdrmlibs); i++) {
+                if (kmsdrmlibs[i].lib) {
+                    SDL_UnloadObject(kmsdrmlibs[i].lib);
+                    kmsdrmlibs[i].lib = NULL;
+                }
+            }
+#endif
+        }
+    }
+}
+
+// returns non-zero if all needed symbols were loaded.
+bool SDL_KMSDRM_LoadSymbols(void)
+{
+    bool result = true; // always succeed if not using Dynamic KMSDRM stuff.
+
+    // deal with multiple modules needing these symbols...
+    if (kmsdrm_load_refcount++ == 0) {
+#ifdef SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC
+        int i;
+        int *thismod = NULL;
+        for (i = 0; i < SDL_arraysize(kmsdrmlibs); i++) {
+            if (kmsdrmlibs[i].libname) {
+                kmsdrmlibs[i].lib = SDL_LoadObject(kmsdrmlibs[i].libname);
+            }
+        }
+
+#define SDL_KMSDRM_MODULE(modname) SDL_KMSDRM_HAVE_##modname = 1; // default yes
+#include "SDL_kmsdrmsym.h"
+
+#define SDL_KMSDRM_MODULE(modname)          thismod = &SDL_KMSDRM_HAVE_##modname;
+#define SDL_KMSDRM_SYM(rc, fn, params)      KMSDRM_##fn = (SDL_DYNKMSDRMFN_##fn)KMSDRM_GetSym(#fn, thismod, true);
+#define SDL_KMSDRM_SYM_CONST(type, name)    KMSDRM_##name = *(SDL_DYNKMSDRMCONST_##name *)KMSDRM_GetSym(#name, thismod, true);
+#define SDL_KMSDRM_SYM_OPT(rc, fn, params)  KMSDRM_##fn = (SDL_DYNKMSDRMFN_##fn)KMSDRM_GetSym(#fn, thismod, false);
+#include "SDL_kmsdrmsym.h"
+
+        if ((SDL_KMSDRM_HAVE_LIBDRM) && (SDL_KMSDRM_HAVE_GBM)) {
+            // all required symbols loaded.
+            SDL_ClearError();
+        } else {
+            // in case something got loaded...
+            SDL_KMSDRM_UnloadSymbols();
+            result = false;
+        }
+
+#else // no dynamic KMSDRM
+
+#define SDL_KMSDRM_MODULE(modname)          SDL_KMSDRM_HAVE_##modname = 1; // default yes
+#define SDL_KMSDRM_SYM(rc, fn, params)      KMSDRM_##fn = fn;
+#define SDL_KMSDRM_SYM_CONST(type, name)    KMSDRM_##name = name;
+#define SDL_KMSDRM_SYM_OPT(rc, fn, params)  KMSDRM_##fn = fn;
+#include "SDL_kmsdrmsym.h"
+
+#endif
+    }
+
+    return result;
+}
+
+#endif // SDL_VIDEO_DRIVER_KMSDRM