[Piglit] [PATCH] Fix clearbuffer-display-lists test case

[Eric Anholt]

On Mon,  6 Feb 2012 14:10:40 -0800, Anuj Phogat <anuj.phogat at gmail.com> wrote:
> Do glClear(GL_COLOR_BUFFER_BIT) before probing the color buffer.
> Test occasionally fails without this call.
> 
> Reported-by: Eric Anholt <eric at anholt.net>
> Signed-off-by: Anuj Phogat <anuj.phogat at gmail.com>
> ---
> Eric, this test was failing on my system once in 10-20 times. 
> 
>  tests/spec/gl-3.0/api/clearbuffer-display-lists.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
> 
> diff --git a/tests/spec/gl-3.0/api/clearbuffer-display-lists.c b/tests/spec/gl-3.0/api/clearbuffer-display-lists.c
> index 8595076..8685af1 100644
> --- a/tests/spec/gl-3.0/api/clearbuffer-display-lists.c
> +++ b/tests/spec/gl-3.0/api/clearbuffer-display-lists.c
> @@ -44,6 +44,8 @@ void piglit_init(int argc, char **argv)
>  	bool pass = true;
>  
>  	piglit_require_gl_version(30);
> +	glClear(GL_COLOR_BUFFER_BIT);
> +
>  	/* Probe the color buffer before creating display list. color buffers
>  	 * are by default cleared to (0.0, 0.0, 0.0, 1.0)
>  	 */

The comment below should probably be fixed, too.  Color buffers are not
cleared by default.
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