write_field()

void MayaFlux::Buffers::DataWriteProcessor::write_field	(	std::string	name,
		Kakshya::DataVariant	data
	)

Write a named field of the attached buffer.

A VolumeGridBuffer field is written through seed_raw, and a NetworkGeometryBuffer state field into the slot its next stage reads. The data size must equal the field's byte size.

Definition at line 71 of file DataWriteProcessor.cpp.

{
    auto payload = std::make_shared<Kakshya::DataVariant>(std::move(data));
    enqueue_write([name = std::move(name), payload](DataWriteProcessor& self, const std::shared_ptr<VKBuffer>& vk) {
        const auto bytes = Kakshya::convert_variant<uint8_t>(*payload);
        const size_t size = bytes.size_bytes();
 
        if (const auto volume = std::dynamic_pointer_cast<VolumeGridBuffer>(vk);
            volume && volume->has_field(name)) {
            if (size != volume->get_field_bytes(name)) {
                MF_RT_ERROR(Journal::Component::Buffers, Journal::Context::BufferProcessing,
                    "DataWriteProcessor write_field '{}' needs exactly {} bytes", name, volume->get_field_bytes(name));
                return;
            }
            volume->seed_raw(name, bytes.data(), size);
            return;
        }
 
        if (const auto network = std::dynamic_pointer_cast<NetworkGeometryBuffer>(vk);
            network && network->has_state(name)) {
            if (size != network->get_state_bytes(name)) {
                MF_RT_ERROR(Journal::Component::Buffers, Journal::Context::BufferProcessing,
                    "DataWriteProcessor write_field '{}' needs exactly {} bytes", name, network->get_state_bytes(name));
                return;
            }
            const auto slot = network->read_state_slot(name);
            if (!slot.mapped_ptr) {
                ensure_staging(self.m_write_staging, size);
            }
            upload_back_buffer(slot, bytes.data(), size, self.m_write_staging);
            return;
        }
 
        MF_RT_ERROR(Journal::Component::Buffers, Journal::Context::BufferProcessing,
            "DataWriteProcessor write_field found no field named '{}' on the attached buffer", name);
    });
}

References MayaFlux::Journal::BufferProcessing, MayaFlux::Journal::Buffers, enqueue_write(), m_write_staging, MF_RT_ERROR, name, network, payload, size, and MayaFlux::Buffers::upload_back_buffer().

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