Attachment 122269 Details for Bug 94524 – Piglit patch to add failing test

Piglit patch to add failing test

0001-arb_tessellation_shader-Check-single-isolines-can-be.patch (text/plain), 1.98 KB, created by James Legg on 2016-03-13 18:03:03 UTC

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Creator: James Legg

Created: 2016-03-13 18:03:03 UTC

Size: 1.98 KB

patch

obsolete

>From d6cc00dcce1a723d9c4f0ad81f4ae4c4b36370fe Mon Sep 17 00:00:00 2001
>From: James Legg <lankyleggy@gmail.com>
>Date: Sun, 13 Mar 2016 17:32:34 +0000
>Subject: [PATCH] arb_tessellation_shader: Check single isolines can be created
>
>From the spec:
>"The number of isolines generated is derived from the first outer
>tessellation level; the number of segments in each isoline is derived from
>the second outer tessellation level."
>
>This demonstrates a bug on Intel Haswell, where the number of isolines is
>derived from the second outer tessellation level, and the number of
>segments from the first.
>---
> .../execution/isoline.shader_test                  | 52 ++++++++++++++++++++++
> 1 file changed, 52 insertions(+)
> create mode 100644 tests/spec/arb_tessellation_shader/execution/isoline.shader_test
>
>diff --git a/tests/spec/arb_tessellation_shader/execution/isoline.shader_test b/tests/spec/arb_tessellation_shader/execution/isoline.shader_test
>new file mode 100644
>index 0000000..ef2fd9c
>--- /dev/null
>+++ b/tests/spec/arb_tessellation_shader/execution/isoline.shader_test
>@@ -0,0 +1,52 @@
>+# Check producing a single tessellated isoline doesn't give multiple lines
>+[require]
>+GLSL >= 1.50
>+GL_ARB_tessellation_shader
>+
>+[vertex shader]
>+
>+void main()
>+{
>+}
>+
>+
>+[tessellation control shader]
>+#extension GL_ARB_tessellation_shader: require
>+layout(vertices = 2) out;
>+
>+void main()
>+{
>+	gl_TessLevelOuter[0] = 1.0;
>+	gl_TessLevelOuter[1] = 4.0;
>+}
>+
>+
>+[tessellation evaluation shader]
>+#extension GL_ARB_tessellation_shader: require
>+layout(isolines, equal_spacing) in;
>+flat out int good;
>+
>+void main()
>+{
>+	gl_Position = vec4(gl_TessCoord.xy * 2.0 - 1.0, 0.0, 1.0);
>+	good = int(gl_TessCoord.y == 0.0);
>+}
>+
>+
>+[fragment shader]
>+flat in int good;
>+
>+void main()
>+{
>+	if (bool(good))
>+		gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0);
>+	else
>+		gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
>+}
>+
>+[test]
>+clear color 0.0 1.0 0.0 1.0
>+clear
>+patch parameter vertices 2
>+draw arrays GL_PATCHES 0 2
>+probe all rgba 0.0 1.0 0.0 1.0
>-- 
>2.5.0
>

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