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[require]
GL >= 3.3
GLSL >= 3.30
GL_ARB_shader_storage_buffer_object
GL_ARB_shader_atomic_counters
[vertex shader passthrough]
[fragment shader]
#version 330
#extension GL_ARB_shader_storage_buffer_object: require
#extension GL_ARB_shader_atomic_counters: require
layout(binding = 0, std430) buffer bufblock {
uint array[64];
uint value;
};
layout(binding = 0) uniform atomic_uint fail;
out vec4 color;
void main()
{
uint x = uint(gl_FragCoord.x);
uint y = uint(gl_FragCoord.y);
uint local_index = y * uint(array.length()) + x;
uint v;
/* For value, every instance should get 3. */
v = atomicMin(value, 7u + local_index);
if (v != 3u)
atomicCounterIncrement(fail);
if (value != 3u)
atomicCounterIncrement(fail);
if (local_index < uint(array.length())) {
uint first_expected = (local_index + 1u) * 4u;
uint second_expected = local_index * 4u;
/* The per-instance value should give the old value on the
* first step. This is expected to be the byte offset of the
* next array element.
*/
v = atomicMin(array[local_index], second_expected);
if (v != first_expected)
atomicCounterIncrement(fail);
/* The per-instance value should give the new value on the
* second step. This is expected to be the byte offset of the
* current array element.
*/
v = atomicExchange(array[local_index], first_expected);
if (v != second_expected)
atomicCounterIncrement(fail);
color = vec4(0.0, 1.0, 0.0, 1.0);
} else {
color = vec4(0.0, 0.0, 1.0, 1.0);
}
}
[test]
atomic counters 1
ssbo 0 260
ssbo 0 subdata int 0 4
ssbo 0 subdata int 4 8
ssbo 0 subdata int 8 12
ssbo 0 subdata int 12 16
ssbo 0 subdata int 16 20
ssbo 0 subdata int 20 24
ssbo 0 subdata int 24 28
ssbo 0 subdata int 28 32
ssbo 0 subdata int 32 36
ssbo 0 subdata int 36 40
ssbo 0 subdata int 40 44
ssbo 0 subdata int 44 48
ssbo 0 subdata int 48 52
ssbo 0 subdata int 52 56
ssbo 0 subdata int 56 60
ssbo 0 subdata int 60 64
ssbo 0 subdata int 64 68
ssbo 0 subdata int 68 72
ssbo 0 subdata int 72 76
ssbo 0 subdata int 76 80
ssbo 0 subdata int 80 84
ssbo 0 subdata int 84 88
ssbo 0 subdata int 88 92
ssbo 0 subdata int 92 96
ssbo 0 subdata int 96 100
ssbo 0 subdata int 100 104
ssbo 0 subdata int 104 108
ssbo 0 subdata int 108 112
ssbo 0 subdata int 112 116
ssbo 0 subdata int 116 120
ssbo 0 subdata int 120 124
ssbo 0 subdata int 124 128
ssbo 0 subdata int 128 132
ssbo 0 subdata int 132 136
ssbo 0 subdata int 136 140
ssbo 0 subdata int 140 144
ssbo 0 subdata int 144 148
ssbo 0 subdata int 148 152
ssbo 0 subdata int 152 156
ssbo 0 subdata int 156 160
ssbo 0 subdata int 160 164
ssbo 0 subdata int 164 168
ssbo 0 subdata int 168 172
ssbo 0 subdata int 172 176
ssbo 0 subdata int 176 180
ssbo 0 subdata int 180 184
ssbo 0 subdata int 184 188
ssbo 0 subdata int 188 192
ssbo 0 subdata int 192 196
ssbo 0 subdata int 196 200
ssbo 0 subdata int 200 204
ssbo 0 subdata int 204 208
ssbo 0 subdata int 208 212
ssbo 0 subdata int 212 216
ssbo 0 subdata int 216 220
ssbo 0 subdata int 220 224
ssbo 0 subdata int 224 228
ssbo 0 subdata int 228 232
ssbo 0 subdata int 232 236
ssbo 0 subdata int 236 240
ssbo 0 subdata int 240 244
ssbo 0 subdata int 244 248
ssbo 0 subdata int 248 252
ssbo 0 subdata int 252 256
ssbo 0 subdata int 256 3
clear color 0.5 0.5 0.5 0.5
clear
draw rect -1 -1 2 2
probe atomic counter 0 == 0
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