Attachment 105940 Details for Bug 83639 – Test case

Test case

struct_base_alignment.shader_test (text/plain), 2.61 KB, created by Ian Romanick on 2014-09-09 02:16:39 UTC

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Creator: Ian Romanick

Created: 2014-09-09 02:16:39 UTC

Size: 2.61 KB

patch

obsolete

>[require]
>GLSL >= 1.50
>
>[vertex shader]
>#extension GL_ARB_shader_bit_encoding: enable
>#extension GL_ARB_gpu_shader5: enable
>
>// To reproduce the Mesa bug, S1 must be larger than 16 bytes and not
>// 16-byte aligned.  In addition, the uniform block must have an instance
>// name.
>
>struct S1 {
>    bvec2       bv1;
>    float       f1;
>    uvec2       uv1;
>};
>
>struct S2 {
>    mat4x2      m42_1;
>};
>
>struct S3 {
>    S2          s2_1;
>};
>
>layout(std140)
>uniform UB {
>                          // base   base  align  padded  row-   array   matrix
>                          // align  off.  off.   size    major  stride  stride
>    S1[2]      s1_1;      //    16     0      0      64    -        32       -
>//    [0]
>//    bvec2       bv1            8     0      0       8    -         -       -
>//    float       f1             4     8      8       4    -         -       -
>//    uvec2       uv1            8    12     16       8    -         -       -
>//    [1]
>//    bvec2       bv1            8    32     32       8    -         -       -
>//    float       f1             4    40     40       4    -         -       -
>//    uvec2       uv1            8    44     48       8    -         -       -
>    S3[1]      s3_1;      //    16    64     64      64    -        64       -
>//    [0]
>//    S2          s2_1          16    64     64      64    -         -       -
>//      mat4x2      m42_1       16    64     64      64   no         -      16
>} ub;
>
>flat out int vertex_pass;
>in vec4 piglit_vertex;
>
>#if defined(GL_ARB_shader_bit_encoding) || defined(GL_ARB_gpu_shader5) || __VERSION__ >= 430
>bool float_match(float u, float f, uint bits) { return floatBitsToUint(u) == bits; }
>#else
>bool float_match(float u, float f, uint bits) { return u == f; }
>#endif
>
>void main()
>{
>    bool pass;
>
>    pass = float_match(ub.s3_1[0].s2_1.m42_1[0].y, 32703.5333028, 0x46ff7f11u);
>
>    vertex_pass = int(pass);
>    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 UB.s3_1[0].s2_1.m42_1 GL_UNIFORM_TYPE GL_FLOAT_MAT4x2
>active uniform UB.s3_1[0].s2_1.m42_1 GL_UNIFORM_SIZE 1
>active uniform UB.s3_1[0].s2_1.m42_1 GL_UNIFORM_OFFSET 64
>active uniform UB.s3_1[0].s2_1.m42_1 GL_UNIFORM_ARRAY_STRIDE 0
>active uniform UB.s3_1[0].s2_1.m42_1 GL_UNIFORM_MATRIX_STRIDE 16
>active uniform UB.s3_1[0].s2_1.m42_1 GL_UNIFORM_IS_ROW_MAJOR 0
>
>uniform mat4x2 UB.s3_1[0].s2_1.m42_1 0x4680c6b6 0x46ff7f11 0x462085c4 0x46cefb3e 0xc6b24e67 0x469e776a 0xc6e2d23a 0xc64833be
>
>draw rect -1 -1 2 2
>probe all rgba 0.0 1.0 0.0 1.0

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