Resizing a GPU-only SSBO

[gwaldron]

I create a GPU-only SSBO. (It's for a Forward+ tile shading system.) A compute shader populates the SSBO, and later a fragment shader consumes it. There is no CPU-side data at all.

auto buffer = vsg::createBufferAndMemory(
    device, size,
    VK_BUFFER_USAGE_STORAGE_BUFFER_BIT,
    VK_SHARING_MODE_EXCLUSIVE,
    VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);

auto bufferInfo = vsg::BufferInfo::create(buffer, 0, size);

descriptorBuffer->bufferInfoList = { bufferInfo };

Later, if the window resizes, I wish to resize this buffer. I replace the BufferInfo with a new one, and then compile the new buffer.

This works, but: I found that I have to then go and recreate all DescriptorSet objects and any BindDescriptorSet commands that use the DescriptorBuffer.

Is there a less cumbersome way than locating and rebuilding the descriptor sets? I'm trying to keep things modular so consumers of the SSBO don't need to know who created it, and vice-versa.

Failing that, is there a way to "recompile" those objects without recreating them entirely and updating the scene graph?

[gwaldron]

Update:
The minimal approach was to (a) compile the newly reallocated Buffer of course, and (b) to locate, release, and recompile any DescriptorSet referencing the original DescriptorBuffer. I did this by calling

descriptorSet->release();
vsg::Context context(device);
descriptorSet->compile(context);

So maybe come kind of dirty() mechanism in DescriptorBuffer would be useful; perhaps it already exists and I didn't find it.