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[require]
GL >= 3.3
GLSL >= 3.30
GL_ARB_shader_storage_buffer_object
GL_ARB_shader_atomic_counters
GL_INTEL_shader_atomic_float_minmax
[vertex shader passthrough]
[fragment shader]
#version 330
#extension GL_ARB_shader_storage_buffer_object: require
#extension GL_ARB_shader_atomic_counters: require
#extension GL_INTEL_shader_atomic_float_minmax: require
layout(binding = 0, std430) buffer bufblock {
float array[64];
float value;
};
layout(binding = 0) uniform atomic_uint fail;
out vec4 color;
void main()
{
int x = int(gl_FragCoord.x);
int y = int(gl_FragCoord.y);
int local_index = y * array.length() + x;
float v;
/* For value, every instance should get 5. */
v = atomicMin(value, 7 + local_index);
if (v != 5)
atomicCounterIncrement(fail);
if (value != 5)
atomicCounterIncrement(fail);
if (local_index < int(array.length())) {
float first_expected = local_index * 4;
float second_expected = -first_expected;
/* The per-instance value should give the old value on the
* first step. This is expected to be the byte offset of the
* current 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 negative 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 float 0 0
ssbo 0 subdata float 4 4
ssbo 0 subdata float 8 8
ssbo 0 subdata float 12 12
ssbo 0 subdata float 16 16
ssbo 0 subdata float 20 20
ssbo 0 subdata float 24 24
ssbo 0 subdata float 28 28
ssbo 0 subdata float 32 32
ssbo 0 subdata float 36 36
ssbo 0 subdata float 40 40
ssbo 0 subdata float 44 44
ssbo 0 subdata float 48 48
ssbo 0 subdata float 52 52
ssbo 0 subdata float 56 56
ssbo 0 subdata float 60 60
ssbo 0 subdata float 64 64
ssbo 0 subdata float 68 68
ssbo 0 subdata float 72 72
ssbo 0 subdata float 76 76
ssbo 0 subdata float 80 80
ssbo 0 subdata float 84 84
ssbo 0 subdata float 88 88
ssbo 0 subdata float 92 92
ssbo 0 subdata float 96 96
ssbo 0 subdata float 100 100
ssbo 0 subdata float 104 104
ssbo 0 subdata float 108 108
ssbo 0 subdata float 112 112
ssbo 0 subdata float 116 116
ssbo 0 subdata float 120 120
ssbo 0 subdata float 124 124
ssbo 0 subdata float 128 128
ssbo 0 subdata float 132 132
ssbo 0 subdata float 136 136
ssbo 0 subdata float 140 140
ssbo 0 subdata float 144 144
ssbo 0 subdata float 148 148
ssbo 0 subdata float 152 152
ssbo 0 subdata float 156 156
ssbo 0 subdata float 160 160
ssbo 0 subdata float 164 164
ssbo 0 subdata float 168 168
ssbo 0 subdata float 172 172
ssbo 0 subdata float 176 176
ssbo 0 subdata float 180 180
ssbo 0 subdata float 184 184
ssbo 0 subdata float 188 188
ssbo 0 subdata float 192 192
ssbo 0 subdata float 196 196
ssbo 0 subdata float 200 200
ssbo 0 subdata float 204 204
ssbo 0 subdata float 208 208
ssbo 0 subdata float 212 212
ssbo 0 subdata float 216 216
ssbo 0 subdata float 220 220
ssbo 0 subdata float 224 224
ssbo 0 subdata float 228 228
ssbo 0 subdata float 232 232
ssbo 0 subdata float 236 236
ssbo 0 subdata float 240 240
ssbo 0 subdata float 244 244
ssbo 0 subdata float 248 248
ssbo 0 subdata float 252 252
ssbo 0 subdata float 256 5
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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