#version 460
#extension GL_EXT_descriptor_heap : require
#extension GL_EXT_structured_descriptor_heap : require
#extension GL_EXT_scalar_block_layout : require
#extension GL_EXT_buffer_reference : require

layout(local_size_x = 1) in;

layout(buffer_type, scalar) buffer DataBuffer {
    uint data0;
    uint data1;
};

layout(buffer_type, scalar) readonly buffer ReadOnlyBuffer {
    uint value;
};

layout(buffer_type, scalar) uniform UniformBuffer {
    uint value;
};

layout(buffer_reference, scalar, buffer_reference_align = 4) buffer BufferReference {
    uint value;
};

struct HeapData {
    uvec2 vector;
    uint values[2];
};

layout(heap_offset = 0) resourceheap BufferHeap0 {
    uint count;
    DataBuffer dataBuffer;
    ReadOnlyBuffer readOnlyBuffer;
    UniformBuffer uniformBuffer;
    BufferReference reference;
    HeapData data;
} bufferHeap0;

layout(heap_offset = 0) samplerheap SamplerHeap0 {
    uint count;
} samplerHeap0;

void writeValue(out uint value) {
    value = 1;
}

void updateValue(inout uint value) {
    value += 1;
}

void main() {
    uint index = gl_GlobalInvocationID.x & 1u;
    bufferHeap0.count = 3; // Issue #4399: the heap itself is read-only.
    bufferHeap0.count += 1;
    ++bufferHeap0.count;
    bufferHeap0.count--;
    bufferHeap0.data.vector.xy = uvec2(1);
    bufferHeap0.data.values[0] = 1;
    bufferHeap0.data.values[index] = 1;
    writeValue(bufferHeap0.count);
    updateValue(bufferHeap0.data.values[index]);
    samplerHeap0.count = 3;
    bufferHeap0.dataBuffer = bufferHeap0.dataBuffer;
    bufferHeap0.reference = bufferHeap0.reference;
    bufferHeap0.readOnlyBuffer.value = 1; // Buffer access must still honor readonly.
    bufferHeap0.uniformBuffer.value = 1; // Uniform buffer contents are also read-only.
}