[Piglit] [PATCH] Add 5 additional tests for arb_cull_distance
Tobias Klausmann
tobias.johannes.klausmann at mni.thm.de
Thu May 21 17:16:56 PDT 2015
On 22.05.2015 01:08, Dylan Baker wrote:
> On Thu, May 21, 2015 at 11:45:32PM +0200, Tobias Klausmann wrote:
>> These five tests are testing the actual culling.
>> Short description:
>> If a positive value is supplied to gl_CullDistance, the vertex is inside the
>> cull volume. If a negative value is supplied, the vertex is outside the cull
>> volume and is discarded.
>>
>> Signed-off-by: Tobias Klausmann <tobias.johannes.klausmann at mni.thm.de>
>> ---
>> ...-distance-vertex-inside-cull-volume.shader_test | 41 +++++++++++++++
>> ...e-vertex-inside-outside-cull-volume.shader_test | 58 ++++++++++++++++++++
>> .../vs-cull-distance-vertex-on-plane.shader_test | 41 +++++++++++++++
>> ...side-cull-volume-inside-clip-volume.shader_test | 61 ++++++++++++++++++++++
>> ...distance-vertex-outside-cull-volume.shader_test | 44 ++++++++++++++++
>> 5 files changed, 245 insertions(+)
>> create mode 100644 tests/spec/arb_cull_distance/vs-cull-distance-vertex-inside-cull-volume.shader_test
>> create mode 100644 tests/spec/arb_cull_distance/vs-cull-distance-vertex-inside-outside-cull-volume.shader_test
>> create mode 100644 tests/spec/arb_cull_distance/vs-cull-distance-vertex-on-plane.shader_test
>> create mode 100644 tests/spec/arb_cull_distance/vs-cull-distance-vertex-outside-cull-volume-inside-clip-volume.shader_test
>> create mode 100644 tests/spec/arb_cull_distance/vs-cull-distance-vertex-outside-cull-volume.shader_test
>>
>> diff --git a/tests/spec/arb_cull_distance/vs-cull-distance-vertex-inside-cull-volume.shader_test b/tests/spec/arb_cull_distance/vs-cull-distance-vertex-inside-cull-volume.shader_test
>> new file mode 100644
>> index 0000000..5dfa194
>> --- /dev/null
>> +++ b/tests/spec/arb_cull_distance/vs-cull-distance-vertex-inside-cull-volume.shader_test
>> @@ -0,0 +1,41 @@
>> +# [description]
> Does this tag actually do anything?
To answer your rhetoric question: No it does not. But it makes a nice
complete picture :-) If you really want it, i can remove this tag...
>> +# Use one gl_CullDistance values to _not_ "cull" away a vertex with a positive
>> +# value supplied to gl_CullDistance.
>> +#
>> +# The gl_CullDistance variable provides a mechanism for controlling user
>> +# culling. The element gl_CullDistance[i] specifies a cull distance for each
>> +# plane i. A distance of 0.0 means that the vertex is on the plane, a positive
>> +# distance means that the vertex is insider the cull volume, and a negative
>> +# distance means that the point is outside the cull volume. Primitives whose
>> +# vertices all have a negative clip distance for plane i will be discarded.
>> +
>> +[require]
>> +GLSL >= 1.30
>> +GL_ARB_cull_distance
>> +
>> +[vertex shader]
>> +#version 130
>> +#extension GL_ARB_cull_distance: enable
>> +
>> +out float gl_CullDistance[1];
>> +
>> +void main(void)
>> +{
>> + gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
>> + gl_CullDistance[0] = 1;
>> +}
>> +
>> +[fragment shader]
>> +#version 130
>> +#extension GL_ARB_cull_distance: enable
>> +
>> +void main(void)
>> +{
>> + gl_FragColor = vec4(0, 1, 0, 1);
>> +}
>> +
>> +[test]
>> +clear color 1.0 0.0 0.0 1.0
>> +clear
>> +draw rect -1 -1 2 2
>> +probe all rgba 0.0 1.0 0.0 1.0
>> diff --git a/tests/spec/arb_cull_distance/vs-cull-distance-vertex-inside-outside-cull-volume.shader_test b/tests/spec/arb_cull_distance/vs-cull-distance-vertex-inside-outside-cull-volume.shader_test
>> new file mode 100644
>> index 0000000..1b0df9b
>> --- /dev/null
>> +++ b/tests/spec/arb_cull_distance/vs-cull-distance-vertex-inside-outside-cull-volume.shader_test
>> @@ -0,0 +1,58 @@
>> +# [description]
>> +# Use 4 gl_CullDistance values to "cull" away some vertices with negative values
>> +# supplied to gl_CullDistance.
>> +#
>> +# The gl_CullDistance variable provides a mechanism for controlling user
>> +# culling. The element gl_CullDistance[i] specifies a cull distance for each
>> +# plane i. A distance of 0.0 means that the vertex is on the plane, a positive
>> +# distance means that the vertex is insider the cull volume, and a negative
>> +# distance means that the point is outside the cull volume. Primitives whose
>> +# vertices all have a negative clip distance for plane i will be discarded.
>> +
>> +[require]
>> +GLSL >= 1.30
>> +GL_ARB_cull_distance
>> +
>> +[vertex shader]
>> +#version 130
>> +#extension GL_ARB_cull_distance: enable
>> +
>> +out float gl_CullDistance[4];
>> +
>> +void main(void)
>> +{
>> + gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
>> +
>> + // Compute 2D cordinates relative to a center point of (0.5,
>> + // 0.5).
>> + vec2 coord = gl_Vertex.xy - vec2(0.5, 0.5);
>> +
>> + for (int i = 0; i < 4; ++i) {
>> + uint j = uint(i);
>> +
>> + // Compute a unit vector in the direction i*45deg from
>> + // the x axis.
>> + float angle = i*(3.141592653589793/4);
>> + vec2 u = vec2(cos(angle), sin(angle));
>> +
>> + gl_CullDistance[j] = -0.5 - dot(u, coord);
>> + }
>> +}
>> +
>> +[fragment shader]
>> +#version 130
>> +#extension GL_ARB_cull_distance: enable
>> +
>> +void main(void)
>> +{
>> + gl_FragColor = vec4(0, 1, 1, 1);
>> +}
>> +
>> +[test]
>> +clear color 0.0 1.0 0.0 1.0
>> +clear
>> +ortho 0 2 0 2
>> +draw rect 0.0 0.0 1.0 1.0
>> +
>> +relative probe rgba (0.100, 0.100) (0.0, 1.0, 1.0, 1.0)
>> +relative probe rgba (0.900, 0.900) (0.0, 1.0, 0.0, 1.0)
>> diff --git a/tests/spec/arb_cull_distance/vs-cull-distance-vertex-on-plane.shader_test b/tests/spec/arb_cull_distance/vs-cull-distance-vertex-on-plane.shader_test
>> new file mode 100644
>> index 0000000..40b74ce
>> --- /dev/null
>> +++ b/tests/spec/arb_cull_distance/vs-cull-distance-vertex-on-plane.shader_test
>> @@ -0,0 +1,41 @@
>> +# [description]
>> +# Use one gl_CullDistance values to _not_ "cull" away a vertex with it on
>> +# the plane (gl_CullDistance=0).
>> +#
>> +# The gl_CullDistance variable provides a mechanism for controlling user
>> +# culling. The element gl_CullDistance[i] specifies a cull distance for each
>> +# plane i. A distance of 0.0 means that the vertex is on the plane, a positive
>> +# distance means that the vertex is insider the cull volume, and a negative
>> +# distance means that the point is outside the cull volume. Primitives whose
>> +# vertices all have a negative clip distance for plane i will be discarded.
>> +
>> +[require]
>> +GLSL >= 1.30
>> +GL_ARB_cull_distance
>> +
>> +[vertex shader]
>> +#version 130
>> +#extension GL_ARB_cull_distance: enable
>> +
>> +out float gl_CullDistance[1];
>> +
>> +void main(void)
>> +{
>> + gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
>> + gl_CullDistance[0] = 0;
>> +}
>> +
>> +[fragment shader]
>> +#version 130
>> +#extension GL_ARB_cull_distance: enable
>> +
>> +void main(void)
>> +{
>> + gl_FragColor = vec4(0, 1, 0, 1);
>> +}
>> +
>> +[test]
>> +clear color 1.0 0.0 0.0 1.0
>> +clear
>> +draw rect -1 -1 2 2
>> +probe all rgba 0.0 1.0 0.0 1.0
>> diff --git a/tests/spec/arb_cull_distance/vs-cull-distance-vertex-outside-cull-volume-inside-clip-volume.shader_test b/tests/spec/arb_cull_distance/vs-cull-distance-vertex-outside-cull-volume-inside-clip-volume.shader_test
>> new file mode 100644
>> index 0000000..a060ac1
>> --- /dev/null
>> +++ b/tests/spec/arb_cull_distance/vs-cull-distance-vertex-outside-cull-volume-inside-clip-volume.shader_test
>> @@ -0,0 +1,61 @@
>> +# [description]
>> +# Use two gl_CullDistance values to "cull" away some vertices with negative
>> +# values. Additionally use two gl_ClipDistance values with positive values to
>> +# see if gl_CullDistance and gl_ClipDistance are different arrays.
>> +#
>> +# The gl_CullDistance variable provides a mechanism for controlling user
>> +# culling. The element gl_CullDistance[i] specifies a cull distance for each
>> +# plane i. A distance of 0.0 means that the vertex is on the plane, a positive
>> +# distance means that the vertex is insider the cull volume, and a negative
>> +# distance means that the point is outside the cull volume. Primitives whose
>> +# vertices all have a negative clip distance for plane i will be discarded.
>> +
>> +[require]
>> +GLSL >= 1.30
>> +GL_ARB_cull_distance
>> +
>> +[vertex shader]
>> +#version 130
>> +#extension GL_ARB_cull_distance: enable
>> +
>> +out float gl_ClipDistance[2];
>> +out float gl_CullDistance[2];
>> +
>> +void main(void)
>> +{
>> + gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
>> +
>> + // Compute 2D cordinates relative to a center point of (0.5,
>> + // 0.5).
>> + vec2 coord = gl_Vertex.xy - vec2(0.5, 0.5);
>> +
>> + for (int i = 0; i < 2; ++i) {
>> + uint j = uint(i);
>> +
>> + // Compute a unit vector in the direction i*45deg from
>> + // the x axis.
>> + float angle = i*(3.141592653589793/4);
>> + vec2 u = vec2(cos(angle), sin(angle));
>> +
>> + gl_CullDistance[j] = -0.5 - dot(u, coord);
>> + gl_ClipDistance[j] = 1 - dot(u, coord);
>> + }
>> +}
>> +
>> +[fragment shader]
>> +#version 130
>> +#extension GL_ARB_cull_distance: enable
>> +
>> +void main(void)
>> +{
>> + gl_FragColor = vec4(0, 1, 1, 1);
>> +}
>> +
>> +[test]
>> +clear color 0.0 1.0 0.0 1.0
>> +clear
>> +ortho 0 2 0 2
>> +draw rect 0.0 0.0 1.0 1.0
>> +
>> +relative probe rgba (0.100, 0.100) (0.0, 1.0, 1.0, 1.0)
>> +relative probe rgba (0.900, 0.900) (0.0, 1.0, 0.0, 1.0)
>> diff --git a/tests/spec/arb_cull_distance/vs-cull-distance-vertex-outside-cull-volume.shader_test b/tests/spec/arb_cull_distance/vs-cull-distance-vertex-outside-cull-volume.shader_test
>> new file mode 100644
>> index 0000000..7ad7e5f
>> --- /dev/null
>> +++ b/tests/spec/arb_cull_distance/vs-cull-distance-vertex-outside-cull-volume.shader_test
>> @@ -0,0 +1,44 @@
>> +# [description]
>> +# Use one gl_CullDistance values to "cull" away a vertex with a negative value
>> +# supplied to gl_CullDistance.
>> +#
>> +# The gl_CullDistance variable provides a mechanism for controlling user
>> +# culling. The element gl_CullDistance[i] specifies a cull distance for each
>> +# plane i. A distance of 0.0 means that the vertex is on the plane, a positive
>> +# distance means that the vertex is insider the cull volume, and a negative
>> +# distance means that the point is outside the cull volume. Primitives whose
>> +# vertices all have a negative clip distance for plane i will be discarded.
>> +
>> +[require]
>> +GLSL >= 1.30
>> +GL_ARB_cull_distance
>> +
>> +[vertex shader]
>> +#version 130
>> +#extension GL_ARB_cull_distance: enable
>> +
>> +out float gl_CullDistance[1];
>> +
>> +void main(void)
>> +{
>> + gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
>> +
>> + gl_CullDistance[0] = -1;
>> +}
>> +
>> +[fragment shader]
>> +#version 130
>> +#extension GL_ARB_cull_distance: enable
>> +
>> +void main(void)
>> +{
>> + gl_FragColor = vec4(1, 0, 0, 1);
>> +}
>> +
>> +[test]
>> +clear color 0.0 1.0 0.0 1.0
>> +clear
>> +ortho 0 1 0 1
>> +draw rect 1.0 0.0 0.0 1.0
>> +
>> +probe all rgba 0.0 1.0 0.0 1.0
>> --
>> 2.4.1
>>
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