Attachment 105808 Details for Bug 83533 – Test case

Test case

padding-after-small-struct.shader_test (text/plain), 1.08 KB, created by Ian Romanick on 2014-09-05 15:26:27 UTC

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Creator: Ian Romanick

Created: 2014-09-05 15:26:27 UTC

Size: 1.08 KB

patch

obsolete

>[require]
>GLSL >= 1.40
>
>[vertex shader]
>/* Looking at the IR dump, the compiler frontend generates
> *
> * (expression bvec2 ubo_load (constant uint (0)) (constant uint (8)))
> *
> * to load s2.bv.x.  However, the GL API (correctly) believes that
> * s2.bv is at offset 16.  Deleting any field from S1 or S2 (or
> * putting the contents of S2 directly in the UBO) masks the problem.
> * It seems that some part of the compiler stack is not putting
> * padding after s1 to align bv to a vec4 boundary.
> */
>struct S1 {
>    int   i;
>};
>
>struct S2 {
>    S1    s1;
>    bvec2 bv;
>};
>
>layout(std140) uniform UB1 {
>    S2    s2;
>};
>
>flat out int vertex_pass;
>in vec4 piglit_vertex;
>
>void main()
>{
>    vertex_pass = int(s2.bv.x);
>
>    gl_Position = piglit_vertex;
>}
>
>[fragment shader]
>out vec4 piglit_fragcolor;
>flat in int vertex_pass;
>
>void main()
>{
>    piglit_fragcolor = bool(vertex_pass) ? vec4(0, 1, 0, 1) : vec4(1, 0, 0, 1);
>}
>
>[test]
>link success
>
>active uniform s2.bv GL_UNIFORM_TYPE GL_BOOL_VEC2
>#active uniform s2.bv GL_UNIFORM_OFFSET 16
>
>uniform int s2.bv 1 1
>
>draw rect -1 -1 2 2
>probe all rgba 0.0 1.0 0.0 1.0

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