The test is the same as the textureGather shader test in shaders/. I didn't
make any changes to it besides the texture function name and #extension. I
didn't even bother figuring out how it works. :)
Marek
On Wed, Nov 28, 2018 at 8:49 PM Ilia Mirkin <imir...@alum.mit.edu> wrote:
> On Wed, Nov 28, 2018 at 8:21 PM Marek Olšák <mar...@gmail.com> wrote:
> >
> > From: Marek Olšák <marek.ol...@amd.com>
> >
> > based on some ARB_texture_gather5 test.
> > ---
> > .../execution/texture4.shader_test | 84 +++++++++++++++++++
> > 1 file changed, 84 insertions(+)
> > create mode 100644
> tests/spec/amd_texture_texture4/execution/texture4.shader_test
> >
> > diff --git
> a/tests/spec/amd_texture_texture4/execution/texture4.shader_test
> b/tests/spec/amd_texture_texture4/execution/texture4.shader_test
> > new file mode 100644
> > index 000000000..b27974d7a
> > --- /dev/null
> > +++ b/tests/spec/amd_texture_texture4/execution/texture4.shader_test
> > @@ -0,0 +1,84 @@
> > +[require]
> > +GLSL >= 1.10
> > +GL_AMD_texture_texture4
> > +
> > +[vertex shader]
>
> I think just doing
>
> [vertex shader passthrough]
>
> gets you this shader without having to specify it.
>
> > +void main()
> > +{
> > + gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
> > +}
> > +
> > +[fragment shader]
> > +#extension GL_AMD_texture_texture4 : require
> > +/* Verify that gather4 always samples from the base level of a
> mipmapped texture */
> > +
> > +uniform sampler2D tex;
> > +
> > +void main()
> > +{
> > + gl_FragColor = texture4(tex, vec2(0.5, 0.5));
> > +}
> > +
> > +[test]
> > +uniform int tex 0
> > +texture miptree 0
>
> IMHO this deserves a comment to remind the reader that level 0 = red,
> 1 = green, 2 = blue, 3 = white.
>
> With these, small fixes,
>
> Reviewed-by: Ilia Mirkin <imir...@alum.mit.edu>
>
> For extra credit, adjust shaders/textureGather.c to allow to use
> texture4 instead. Probably too complicated though.
>
> > +texparameter 2D min linear_mipmap_linear
> > +texparameter 2D mag nearest
> > +
> > +texparameter 2D base_level 0
> > +
> > +texparameter 2D swizzle_r red
> > +draw rect -1 -1 0.5 0.5
> > +relative probe rgb (0.125, 0.125) (1.0, 1.0, 1.0)
> > +texparameter 2D swizzle_r green
> > +draw rect -0.5 -1 0.5 0.5
> > +relative probe rgb (0.375, 0.125) (0.0, 0.0, 0.0)
> > +texparameter 2D swizzle_r blue
> > +draw rect 0 -1 0.5 0.5
> > +relative probe rgb (0.625, 0.125) (0.0, 0.0, 0.0)
> > +texparameter 2D swizzle_r alpha
> > +draw rect 0.5 -1 0.5 0.5
> > +relative probe rgb (0.875, 0.125) (1.0, 1.0, 1.0)
> > +
> > +texparameter 2D base_level 1
> > +
> > +texparameter 2D swizzle_r red
> > +draw rect -1 -0.5 0.5 0.5
> > +relative probe rgb (0.125, 0.375) (0.0, 0.0, 0.0)
> > +texparameter 2D swizzle_r green
> > +draw rect -0.5 -0.5 0.5 0.5
> > +relative probe rgb (0.375, 0.375) (1.0, 1.0, 1.0)
> > +texparameter 2D swizzle_r blue
> > +draw rect 0 -0.5 0.5 0.5
> > +relative probe rgb (0.625, 0.375) (0.0, 0.0, 0.0)
> > +texparameter 2D swizzle_r alpha
> > +draw rect 0.5 -0.5 0.5 0.5
> > +relative probe rgb (0.875, 0.375) (1.0, 1.0, 1.0)
> > +
> > +texparameter 2D base_level 2
> > +texparameter 2D swizzle_r red
> > +draw rect -1 0 0.5 0.5
> > +relative probe rgb (0.125, 0.625) (0.0, 0.0, 0.0)
> > +texparameter 2D swizzle_r green
> > +draw rect -0.5 0 0.5 0.5
> > +relative probe rgb (0.375, 0.625) (0.0, 0.0, 0.0)
> > +texparameter 2D swizzle_r blue
> > +draw rect 0 0 0.5 0.5
> > +relative probe rgb (0.625, 0.625) (1.0, 1.0, 1.0)
> > +texparameter 2D swizzle_r alpha
> > +draw rect 0.5 0 0.5 0.5
> > +relative probe rgb (0.875, 0.625) (1.0, 1.0, 1.0)
> > +
> > +texparameter 2D base_level 3
> > +texparameter 2D swizzle_r red
> > +draw rect -1 0.5 0.5 0.5
> > +relative probe rgb (0.125, 0.875) (1.0, 1.0, 1.0)
> > +texparameter 2D swizzle_r green
> > +draw rect -0.5 0.5 0.5 0.5
> > +relative probe rgb (0.375, 0.875) (1.0, 1.0, 1.0)
> > +texparameter 2D swizzle_r blue
> > +draw rect 0 0.5 0.5 0.5
> > +relative probe rgb (0.625, 0.875) (1.0, 1.0, 1.0)
> > +texparameter 2D swizzle_r alpha
> > +draw rect 0.5 0.5 0.5 0.5
> > +relative probe rgb (0.875, 0.875) (1.0, 1.0, 1.0)
> > --
> > 2.17.1
> >
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