update()

void MayaFlux::Buffers::SliceSet::update	(	SliceId	id,
		std::span< const uint8_t >	bytes
	)

Replace a block's vertices.

Same size writes in place. A different size shifts every later block.

Definition at line 46 of file SliceSet.cpp.

{
    auto it = m_slices.find(id);
    if (it == m_slices.end() || bytes.size() % m_stride != 0) {
        MF_ERROR(Journal::Component::Buffers, Journal::Context::BufferManagement,
            "SliceSet::update: unknown slice {} or {} bytes is not a whole number of {} byte vertices",
            id, bytes.size(), m_stride);
        return;
    }
 
    auto& slice = it->second;
 
    if (bytes.size() == slice.byte_size) {
        if (!bytes.empty()) {
            std::memcpy(m_mirror.data() + slice.byte_offset, bytes.data(), bytes.size());
            mark_dirty(slice.byte_offset, slice.byte_offset + bytes.size());
        }
        return;
    }
 
    const auto first = m_mirror.begin() + static_cast<std::ptrdiff_t>(slice.byte_offset);
    m_mirror.erase(first, first + static_cast<std::ptrdiff_t>(slice.byte_size));
    m_mirror.insert(m_mirror.begin() + static_cast<std::ptrdiff_t>(slice.byte_offset),
        bytes.begin(), bytes.end());
    slice.byte_size = bytes.size();
 
    const auto position = std::ranges::find(m_memory_order, id);
    repack_from(static_cast<size_t>(position - m_memory_order.begin()));
    mark_dirty(slice.byte_offset, m_mirror.size());
    m_runs_changed = true;
}

References MayaFlux::Journal::BufferManagement, MayaFlux::Journal::Buffers, m_memory_order, m_mirror, m_runs_changed, m_slices, m_stride, mark_dirty(), MF_ERROR, position, and repack_from().

Referenced by MayaFlux::Buffers::FormaProcessor::set_bytes(), and MayaFlux::Buffers::FormaProcessor::update_slice().

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