# Check that triangles delivered to the geometry shader using
# GL_TRIANGLE_STRIP have the correct orientation.
#
# It works by rendering 4 triangles in a strip and using
# gl_FrontFacing to check that they all have the same orientation.

[require]
GL >= 2.0
GLSL >= 1.50
GL_NV_conservative_raster

[vertex shader passthrough]

[fragment shader]
out vec4 color;
void main()
{
  color = vec4(0.0, 1.0, 0.0, 1.0);
}

[vertex data]
piglit_vertex/float/2
-1.0 -1.0
 1.0  0.996
 1.0 -1.0

[test]
#extension GL_NV_conservative_raster: require

clear color 0.0 0.0 0.0 0.0
clear

enable GL_CONSERVATIVE_RASTERIZATION_NV
draw arrays GL_TRIANGLE_FAN 0 3
probe rgba 249 249 0.0 1.0 0.0 1.0

clear
disable GL_CONSERVATIVE_RASTERIZATION_NV
draw arrays GL_TRIANGLE_FAN 0 3
probe rgba 249 249 0.0 0.0 0.0 0.0