Mesa (master): mesa: Only allow queries of window system FBO on desktop GL w/ARB_fbo

[Ian Romanick]

Module: Mesa
Branch: master
Commit: da2e41cd88dd68b658534390ed69dd422172d07b
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=da2e41cd88dd68b658534390ed69dd422172d07b

Author: Ian Romanick <ian.d.romanick at intel.com>
Date:   Mon Oct  3 12:04:09 2011 -0700

mesa: Only allow queries of window system FBO on desktop GL w/ARB_fbo

Neither OES_framebuffer_object nor EXT_framebuffer_object allow
querying the window system FBO.

Signed-off-by: Ian Romanick <ian.d.romanick at intel.com>
Reviewed-by: Brian Paul <brianp at vmware.com>
Reviewed-by: Jose Fonseca <jfonseca at vmware.com>

---

 src/mesa/main/fbobject.c |   15 +++++++++++++++
 1 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c
index e945f0b..f9da54e 100644
--- a/src/mesa/main/fbobject.c
+++ b/src/mesa/main/fbobject.c
@@ -2276,6 +2276,21 @@ _mesa_GetFramebufferAttachmentParameterivEXT(GLenum target, GLenum attachment,
    }
 
    if (is_winsys_fbo(buffer)) {
+      /* Page 126 (page 136 of the PDF) of the OpenGL ES 2.0.25 spec
+       * says:
+       *
+       *     "If the framebuffer currently bound to target is zero, then
+       *     INVALID_OPERATION is generated."
+       *
+       * The EXT_framebuffer_object spec has the same wording, and the
+       * OES_framebuffer_object spec refers to the EXT_framebuffer_object
+       * spec.
+       */
+      if (ctx->API != API_OPENGL || !ctx->Extensions.ARB_framebuffer_object) {
+	 _mesa_error(ctx, GL_INVALID_OPERATION,
+		     "glGetFramebufferAttachmentParameteriv(bound FBO = 0)");
+	 return;
+      }
       /* the default / window-system FBO */
       att = _mesa_get_fb0_attachment(ctx, buffer, attachment);
    }