1 files changed, 46 insertions, 0 deletions
diff --git a/opengl.h b/opengl.h
new file mode 100644
index 000000000..b48b441d0
--- /dev/null
+++ b/opengl.h
@@ -0,0 +1,46 @@
+/*
+ * Compton - a compositor for X11
+ *
+ * Based on `xcompmgr` - Copyright (c) 2003, Keith Packard
+ *
+ * Copyright (c) 2011-2013, Christopher Jeffrey
+ * See LICENSE for more information.
+ *
+ */
+
+#include "common.h"
+
+#include <ctype.h>
+
+/**
+ * Check if a GLX extension exists.
+ */
+static inline bool
+glx_hasext(session_t *ps, const char *ext) {
+  const char *glx_exts = glXQueryExtensionsString(ps->dpy, ps->scr);
+  const char *pos = strstr(glx_exts, ext);
+  // Make sure the extension string is matched as a whole word
+  if (!pos
+      || ((pos - glx_exts) && !isspace(*(pos - 1)))
+      || (strlen(pos) > strlen(ext) && !isspace(pos[strlen(ext)]))) {
+    printf_errf("(): Missing OpenGL extension %s.", ext);
+    return false;
+  }
+
+  return true;
+}
+
+static inline XVisualInfo *
+get_visualinfo_from_visual(session_t *ps, Visual *visual) {
+  XVisualInfo vreq = { .visualid = XVisualIDFromVisual(visual) };
+  int nitems = 0;
+
+  return XGetVisualInfo(ps->dpy, VisualIDMask, &vreq, &nitems);
+}
+
+static bool
+glx_update_fbconfig(session_t *ps);
+
+static int
+glx_cmp_fbconfig(session_t *ps,
+    const glx_fbconfig_t *pfbc_a, const glx_fbconfig_t *pfbc_b);