On 25 May 2013 22:44, Fabian Bieler <fabianbie...@fastmail.fm> wrote:
> --- > .../execution/generate-zero-primitives.shader_test | 55 > ++++++++++++++++++++++ > 1 file changed, 55 insertions(+) > create mode 100644 > tests/spec/arb_geometry_shader4/execution/generate-zero-primitives.shader_test > > diff --git > a/tests/spec/arb_geometry_shader4/execution/generate-zero-primitives.shader_test > b/tests/spec/arb_geometry_shader4/execution/generate-zero-primitives.shader_test > new file mode 100644 > index 0000000..d6d5b5b > --- /dev/null > +++ > b/tests/spec/arb_geometry_shader4/execution/generate-zero-primitives.shader_test > @@ -0,0 +1,55 @@ > +[require] > +GL >= 2.0 > +GLSL >= 1.10 > +GL_ARB_geometry_shader4 > + > +[vertex shader] > +#version 110 > + > +attribute vec4 vertex; > + > +void main() > +{ > + gl_Position = vertex; > +} > + > +[geometry shader] > +#version 110 > +#extension GL_ARB_geometry_shader4: enable > + > +void main() > +{ > + int minus_one = -1; > + for (int i = 0; i < 3; i++) { > + minus_one += int(gl_PositionIn[i].x + gl_PositionIn[i].y); > + } > + /* minus_one should still be -1. */ > + for (int i = 0; i < minus_one; i++) { > + gl_Position = gl_PositionIn[i]; > + EmitVertex(); > + } > +} > This seems like a lot of effort to go to, when you could get the same effect from: void main() { } What's the goal in doing the extra work? > + > +[geometry layout] > +input type GL_TRIANGLES > +output type GL_TRIANGLE_STRIP > +vertices out 3 > + > +[fragment shader] > +#version 110 > + > +void main() > +{ > + gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0); > +} > + > +[vertex data] > +vertex/float/2 > +-1.0 -1.0 > + 1.0 -1.0 > + 1.0 1.0 > +-1.0 1.0 > + > +[test] > The contents of the back buffer are undefined at the start of the test. To make the test deterministic, you'll need to add this: clear color 0.0 0.0 0.0 0.0 clear > +draw arrays GL_TRIANGLE_FAN 0 4 > +probe all rgb 0.0 0.0 0.0 > -- > 1.8.1.2 > > _______________________________________________ > Piglit mailing list > Piglit@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/piglit >
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