read_field()

void MayaFlux::Buffers::DataReadProcessor::read_field

(

std::string

name

)

Read the current read slot of a named field on the attached buffer.

Resolves a VolumeGridBuffer field or a NetworkGeometryBuffer state field, at the time the request runs so a swapped generation is not read stale.

Definition at line 83 of file DataReadProcessor.cpp.

{
    arm([name = std::move(name)](DataReadProcessor& self, const std::shared_ptr<VKBuffer>& vk, PendingRead& pending) {
        if (const auto volume = std::dynamic_pointer_cast<VolumeGridBuffer>(vk);
            volume && volume->has_field(name)) {
            const size_t bytes = volume->get_field_bytes(name);
            pending.handle = {
                .buffer = volume->read_handle(name),
                .mapped_ptr = nullptr,
                .size_bytes = bytes,
            };
            return submit_read(pending, self.m_staging, bytes, 0, false, true);
        }
 
        if (const auto network = std::dynamic_pointer_cast<NetworkGeometryBuffer>(vk);
            network && network->has_state(name)) {
            const size_t bytes = network->get_state_bytes(name);
            pending.handle = gpu_buffer_handle(network->read_state_slot(name), bytes);
            return submit_read(pending, self.m_staging, bytes, 0, true, true);
        }
 
        MF_RT_ERROR(Journal::Component::Buffers, Journal::Context::BufferProcessing,
            "DataReadProcessor read_field found no field named '{}' on the attached buffer", name);
        return false;
    });
}

References arm(), MayaFlux::Portal::Graphics::GpuBufferHandle::buffer, MayaFlux::Journal::BufferProcessing, MayaFlux::Journal::Buffers, MayaFlux::Buffers::gpu_buffer_handle(), MayaFlux::Buffers::DataReadProcessor::PendingRead::handle, m_staging, MF_RT_ERROR, name, network, and submit_read().

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