[PATCH 1/1] winex11.drv: Fix wglSwapBuffers() with NULL current context with child window rendering.

[Paul Gofman]

From: Paul Gofman

---
 dlls/winex11.drv/opengl.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/dlls/winex11.drv/opengl.c b/dlls/winex11.drv/opengl.c
index bb8f13f78b9..baeb6fe87fa 100644
--- a/dlls/winex11.drv/opengl.c
+++ b/dlls/winex11.drv/opengl.c
@@ -3401,7 +3401,7 @@ static BOOL glxdrv_wglSwapBuffers( HDC hdc )
         if (gl->type == DC_GL_CHILD_WIN) escape.gl_drawable = gl->window;
         /* fall through */
     default:
-        if (escape.gl_drawable && pglXSwapBuffersMscOML)
+        if (ctx && (escape.drawable || gl->layered_type) && pglXSwapBuffersMscOML)
         {
             pglFlush();
             target_sbc = pglXSwapBuffersMscOML( gdi_display, gl->drawable, 0, 0, 0 );
@@ -3411,13 +3411,13 @@ static BOOL glxdrv_wglSwapBuffers( HDC hdc )
         break;
     }

-    if (escape.gl_drawable && pglXWaitForSbcOML)
+    if (ctx && escape.gl_drawable && pglXWaitForSbcOML)
         pglXWaitForSbcOML( gdi_display, gl->drawable, target_sbc, &ust, &msc, &sbc );

release_gl_drawable( gl );

if (escape.gl_drawable)
-        NtGdiExtEscape( ctx->hdc, NULL, 0, X11DRV_ESCAPE, sizeof(escape), (LPSTR)&escape, 0, NULL );
+        NtGdiExtEscape( ctx ? ctx->hdc : hdc, NULL, 0, X11DRV_ESCAPE, sizeof(escape), (LPSTR)&escape, 0, NULL );
     return TRUE;
 }