Ken Thomases : winemac: Fix redirection of OpenGL extension functions.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 6c6afb2ce9517d0d10ad0feb369d34f1ee2fa369
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=6c6afb2ce9517d0d10ad0feb369d34f1ee2fa369

Author: Ken Thomases <ken at codeweavers.com>
Date:   Thu Oct 17 17:53:45 2019 -0500

winemac: Fix redirection of OpenGL extension functions.

This never worked.  opengl_funcs.ext.p_<func> would always be NULL at the time
it was checked, so nothing would be changed.

Signed-off-by: Ken Thomases <ken at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/winemac.drv/opengl.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/dlls/winemac.drv/opengl.c b/dlls/winemac.drv/opengl.c
index 8625350b2c..5197e15fbb 100644
--- a/dlls/winemac.drv/opengl.c
+++ b/dlls/winemac.drv/opengl.c
@@ -4277,6 +4277,9 @@ static BOOL init_opengl(void)
         }
     }
 
+    if (!init_gl_info())
+        goto failed;
+
     /* redirect some standard OpenGL functions */
 #define REDIRECT(func) \
     do { p##func = opengl_funcs.gl.p_##func; opengl_funcs.gl.p_##func = macdrv_##func; } while(0)
@@ -4292,13 +4295,10 @@ static BOOL init_opengl(void)
 
     /* redirect some OpenGL extension functions */
 #define REDIRECT(func) \
-    do { if (opengl_funcs.ext.p_##func) { p##func = opengl_funcs.ext.p_##func; opengl_funcs.ext.p_##func = macdrv_##func; } } while(0)
+    do { if ((p##func = wine_dlsym(opengl_handle, #func, NULL, 0))) { opengl_funcs.ext.p_##func = macdrv_##func; } } while(0)
     REDIRECT(glCopyColorTable);
 #undef REDIRECT
 
-    if (!init_gl_info())
-        goto failed;
-
     if (gluCheckExtension((GLubyte*)"GL_APPLE_flush_render", (GLubyte*)gl_info.glExtensions))
         pglFlushRenderAPPLE = wine_dlsym(opengl_handle, "glFlushRenderAPPLE", NULL, 0);