1 files changed, 39 insertions, 0 deletions
diff --git a/src/glx.c b/src/glx.c
new file mode 100644
index 0000000..4a5af9d
--- /dev/null
+++ b/src/glx.c
@@ -0,0 +1,39 @@
+#include "../include/mgl/glx.h"
+#include <dlfcn.h>
+#include <stdio.h>
+#include <GL/glx.h>
+
+static void* dlsym_print_fail(void *handle, const char *name) {
+    dlerror();
+    void *sym = dlsym(handle, name);
+    char *err_str = dlerror();
+
+    if(!sym)
+        fprintf(stderr, "dlsym(handle, \"%s\") failed, error: %s\n", name, err_str ? err_str : "(null)");
+
+    return sym;
+}
+
+int mgl_glx_load(mgl_glx *self) {
+    const char *glx_path = "/usr/lib/libGLX.so.0";
+    self->handle = dlopen(glx_path, RTLD_LAZY);
+    if(!self->handle) {
+        fprintf(stderr, "dlopen(\"%s\", RTLD_LAZY) failed\n", glx_path);
+        return -1;
+    }
+
+    self->glXGetFBConfigs = (GLXFBConfig* (*)(Display*, int, int*))dlsym_print_fail(self->handle, "glXGetFBConfigs");
+    if(!self->glXGetFBConfigs) {
+        mgl_glx_unload(self);
+        return -1;
+    }
+
+    return 0;
+}
+
+void mgl_glx_unload(mgl_glx *self) {
+    if(self->handle) {
+        dlclose(self->handle);
+        self->handle = NULL;
+    }
+}