[waffle] [PATCH] glx: Query proper extension string for ARB_create_context etc.

[Paul Berry]

Previously we were using glXQueryExtensionsString() to see whether the
implementation supported ARB_create_context,
ARB_create_context_profile, and EXT_create_context_es_profile.  This
is the wrong query--those extensions show up in the *client* extension
string, so we need to use glXGetClientString().

This allows us to create core contexts using GLX.
---
 src/waffle/glx/glx_display.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/waffle/glx/glx_display.c b/src/waffle/glx/glx_display.c
index a29fb3c..15c52ae 100644
--- a/src/waffle/glx/glx_display.c
+++ b/src/waffle/glx/glx_display.c
@@ -51,8 +51,7 @@ static bool
 glx_display_set_extensions(struct glx_display *self)
 {
 
-    const char *s = glXQueryExtensionsString(self->x11.xlib,
-                                             self->x11.screen);
+    const char *s = glXGetClientString(self->x11.xlib, GLX_EXTENSIONS);
     if (!s) {
         wcore_errorf(WAFFLE_ERROR_UNKNOWN,
                      "glXQueryExtensionsString failed");
-- 
1.8.3