Mesa (master): osmesa: fix renderbuffer memleak in OSMesaMakeCurrent()

[Brian Paul]

Module: Mesa
Branch: master
Commit: 9c2b4814d0b7dc67777099ea249c09bcf9ee46eb
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=9c2b4814d0b7dc67777099ea249c09bcf9ee46eb

Author: Brian Paul <brianp at vmware.com>
Date:   Sat Oct 30 10:10:52 2010 -0600

osmesa: fix renderbuffer memleak in OSMesaMakeCurrent()

Fixes fd.o bug 31128.

---

 src/mesa/drivers/osmesa/osmesa.c |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/mesa/drivers/osmesa/osmesa.c b/src/mesa/drivers/osmesa/osmesa.c
index 37dc35c..10ba6b7 100644
--- a/src/mesa/drivers/osmesa/osmesa.c
+++ b/src/mesa/drivers/osmesa/osmesa.c
@@ -1327,10 +1327,12 @@ OSMesaMakeCurrent( OSMesaContext osmesa, void *buffer, GLenum type,
     * that converts rendering from CHAN_BITS to the user-requested channel
     * size.
     */
-   osmesa->rb = new_osmesa_renderbuffer(&osmesa->mesa, osmesa->format, type);
-   _mesa_remove_renderbuffer(osmesa->gl_buffer, BUFFER_FRONT_LEFT);
-   _mesa_add_renderbuffer(osmesa->gl_buffer, BUFFER_FRONT_LEFT, osmesa->rb);
-   assert(osmesa->rb->RefCount == 2);
+   if (!osmesa->rb) {
+      osmesa->rb = new_osmesa_renderbuffer(&osmesa->mesa, osmesa->format, type);
+      _mesa_remove_renderbuffer(osmesa->gl_buffer, BUFFER_FRONT_LEFT);
+      _mesa_add_renderbuffer(osmesa->gl_buffer, BUFFER_FRONT_LEFT, osmesa->rb);
+      assert(osmesa->rb->RefCount == 2);
+   }
 
    /* Set renderbuffer fields.  Set width/height = 0 to force 
     * osmesa_renderbuffer_storage() being called by _mesa_resize_framebuffer()