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-rw-r--r--progs/demos/osdemo16.c5
-rw-r--r--progs/demos/osdemo32.c5
2 files changed, 10 insertions, 0 deletions
diff --git a/progs/demos/osdemo16.c b/progs/demos/osdemo16.c
index f2f321b9b3..6f892620ce 100644
--- a/progs/demos/osdemo16.c
+++ b/progs/demos/osdemo16.c
@@ -128,6 +128,11 @@ static void render_image( void )
glPopMatrix();
+ /* This is very important!!!
+ * Make sure buffered commands are finished!!!
+ */
+ glFinish();
+
gluDeleteQuadric(qobj);
{
diff --git a/progs/demos/osdemo32.c b/progs/demos/osdemo32.c
index 66e821ad4e..b425a56c84 100644
--- a/progs/demos/osdemo32.c
+++ b/progs/demos/osdemo32.c
@@ -127,6 +127,11 @@ static void render_image( void )
glPopMatrix();
+ /* This is very important!!!
+ * Make sure buffered commands are finished!!!
+ */
+ glFinish();
+
gluDeleteQuadric(qobj);
{