mesa: return GL_FRAMEBUFFER_DEFAULT as FBO attachment type

If querying the default/window-system FBO's attachment type, return
GL_FRAMEBUFFER_DEFAULT (per the GL_ARB_framebuffer_object spec).

See http://bugs.freedesktop.org/show_bug.cgi?id=31947

NOTE: This is a candidate for the 7.9 branch.

diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c
index 560a2f6..47ac630 100644 (file)
--- a/src/mesa/main/fbobject.c
+++ b/src/mesa/main/fbobject.c
@@ -2014,7 +2014,7 @@ _mesa_GetFramebufferAttachmentParameterivEXT(GLenum target, GLenum attachment,
 
    switch (pname) {
    case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT:
-      *params = att->Type;
+      *params = buffer->Name == 0 ? GL_FRAMEBUFFER_DEFAULT : att->Type;
       return;
    case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT:
       if (att->Type == GL_RENDERBUFFER_EXT) {