[Mesa-dev] [PATCH 1/2] mesa: Return GL_FRAMEBUFFER_UNDEFINED if the winsys fbo is incomplete.

[Matt Turner]

Specified by ARB_framebuffer_object, GL 3.0, and ES 3.0.
---
 src/mesa/main/fbobject.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c
index a29f1ab..bf7e85c 100644
--- a/src/mesa/main/fbobject.c
+++ b/src/mesa/main/fbobject.c
@@ -2141,8 +2141,12 @@ _mesa_CheckFramebufferStatus(GLenum target)
    }
 
    if (_mesa_is_winsys_fbo(buffer)) {
-      /* The window system / default framebuffer is always complete */
-      return GL_FRAMEBUFFER_COMPLETE_EXT;
+      /* EGL_KHR_surfaceless_context allows the winsys FBO to be incomplete. */
+      if (buffer != &IncompleteFramebuffer) {
+         return GL_FRAMEBUFFER_COMPLETE_EXT;
+      } else {
+         return GL_FRAMEBUFFER_UNDEFINED;
+      }
    }
 
    /* No need to flush here */
-- 
1.8.1.5