[Piglit] [PATCH] Modify RASTERIZER_DISCARD test to try also drawing lines and points.

[Paul Berry]

Previously, the RASTERIZER_DISCARD test only tried drawing a filled
rectangle (which is typically implemented by drawing two triangles).
This patch modifies the test to verify that RASTERIZER_DISCARD also
properly discards lines and points.

Verified using the nVidia proprietary driver for Linux and using Mesa
i965 on Sandy Bridge.
---
 .../ext_transform_feedback/discard-drawarrays.c    |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/tests/spec/ext_transform_feedback/discard-drawarrays.c b/tests/spec/ext_transform_feedback/discard-drawarrays.c
index a9ffa39..1acb136 100644
--- a/tests/spec/ext_transform_feedback/discard-drawarrays.c
+++ b/tests/spec/ext_transform_feedback/discard-drawarrays.c
@@ -58,6 +58,14 @@ piglit_display(void)
 	glEnable(GL_RASTERIZER_DISCARD);
 	glColor4f(1.0, 0.0, 0.0, 0.0);
 	piglit_draw_rect(-1, -1, 2, 2);
+	glBegin(GL_LINE_LOOP);
+	glVertex2f(-0.5, -0.5);
+	glVertex2f(0.5, -0.5);
+	glVertex2f(0.0, 0.5);
+	glEnd();
+	glBegin(GL_POINTS);
+	glVertex2f(0.0, 0.0);
+	glEnd();
 
 	pass = piglit_probe_rect_rgba(0, 0, piglit_width, piglit_height, green);
 
-- 
1.7.6.4