[Piglit] [PATCH v2] sample-depth: use tri-strip and rgba visual

[Chris Forbes]

Since we discussed this on IRC;

Reviewed-by: Chris Forbes <chrisf at ijw.co.nz>

On Wed, Jul 8, 2015 at 4:08 PM, Ilia Mirkin <imirkin at alum.mit.edu> wrote:
> This fixes it on nvc0 (and I'm guessing nv50). It appears that NVIDIA
> hw tessellates in an unexpected fashion. We also only check 3 components
> since we only have an RGB visual (and the alpha isn't that interesting).
>
> Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
> ---
>  tests/spec/arb_texture_multisample/sample-depth.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/tests/spec/arb_texture_multisample/sample-depth.c b/tests/spec/arb_texture_multisample/sample-depth.c
> index 6334833..d6f5313 100644
> --- a/tests/spec/arb_texture_multisample/sample-depth.c
> +++ b/tests/spec/arb_texture_multisample/sample-depth.c
> @@ -43,7 +43,7 @@ PIGLIT_GL_TEST_CONFIG_END
>
>  GLuint prog, fbo;
>
> -float green[] = {0,1,0,0};
> +float green[] = {0,1,0};
>
>  enum piglit_result
>  piglit_display(void)
> @@ -61,11 +61,11 @@ piglit_display(void)
>
>         glEnable(GL_DEPTH_TEST);
>
> -       glBegin(GL_QUADS);
> +       glBegin(GL_TRIANGLE_STRIP);
>                 glVertex3f(-1.0f, -1.0f,  1.0f);
>                 glVertex3f( 1.0f, -1.0f, -1.0f);
> -               glVertex3f( 1.0f,  1.0f,  1.0f);
>                 glVertex3f(-1.0f,  1.0f, -1.0f);
> +               glVertex3f( 1.0f,  1.0f,  1.0f);
>         glEnd();
>
>         glDisable(GL_DEPTH_TEST);
> @@ -81,7 +81,7 @@ piglit_display(void)
>
>         piglit_draw_rect(-1, -1, 2, 2);
>
> -       pass = piglit_probe_rect_rgba(0, 0, TEX_WIDTH, TEX_HEIGHT, green) && pass;
> +       pass = piglit_probe_rect_rgb(0, 0, TEX_WIDTH, TEX_HEIGHT, green) && pass;
>
>         piglit_present_results();
>
> --
> 2.3.6
>