Add a performance profiler

[gldbg.git] / source / glwrap.c

diff --git a/source/glwrap.c b/source/glwrap.c
index d51eb3192106b9ce94fa77b200a2c6797565f0de..bf05214b8a09d7ee844d5567626b395b2066f1db 100644 (file)
--- a/source/glwrap.c
+++ b/source/glwrap.c
@@ -21,10 +21,13 @@ static inline void *glsym(const char *sym)
        static void *libgl = NULL;
        if(!libgl)
        {
-               libgl = dlopen("libGL.so", RTLD_NOW);
+               const char *libgl_name = getenv("GLWRAP_LIBGL");
+               if(!libgl_name)
+                       libgl_name = "libGL.so";
+               libgl = dlopen(libgl_name, RTLD_NOW);
                if(!libgl)
                {
-                       fprintf(stderr, "Could not open libGL: %s\n", dlerror());
+                       fprintf(stderr, "Could not open %s: %s\n", libgl_name, dlerror());
                        abort();
                }
        }
@@ -188,12 +191,20 @@ GLenum APIENTRY glGetError()
 
 void (*glXGetProcAddress(const GLubyte *procname))(void)
 {
-       void *handle = dlopen(NULL, RTLD_LAZY);
-       void (*ret)() = dlsym(handle, (const char *)procname);
+       void *handle = 0;
+       void (*ret)() = 0;
+
+       if(glsym((const char *)procname))
+       {
+               handle = dlopen(NULL, RTLD_LAZY);
+               ret = dlsym(handle, (const char *)procname);
+       }
+
        begin_packet(FUNC_GLXGETPROCADDRESS);
        write_pointer(ret);
-       write_string(procname);
+       write_string((const char *)procname);
        send_packet();
+
        return ret;
 }