on_before_execute()

bool MayaFlux::Buffers::VertexFieldProcessor::on_before_execute ( Portal::Graphics::CommandBufferID  cmd_id, const std::shared_ptr< VKBuffer > &  buffer  )

overrideprotectedvirtual

Rebuild on a stale revision, resolve the range, write push constants.

Returns

False to suppress the dispatch when the range is empty or the operator no longer produces a spec.

Reimplemented from MayaFlux::Buffers::ShaderProcessor.

Definition at line 181 of file VertexFieldProcessor.cpp.

{
    if (!buffer)
        return false;
 
    if (!sync_revision())
        return false;
 
    const uint32_t capacity = buffer_capacity(buffer);
    if (capacity == 0)
        return false;
 
    if (m_range_set) {
        if (m_explicit_first >= capacity) {
            MF_RT_ERROR(Journal::Component::Buffers, Journal::Context::BufferProcessing,
                "VertexFieldProcessor: range starts at {} but the buffer holds {} "
                "records. Dispatch suppressed.",
                m_explicit_first, capacity);
            return false;
        }
 
        m_params.first_vertex = m_explicit_first;
        m_params.vertex_count = std::min(m_explicit_count, capacity - m_explicit_first);
    } else {
        m_params.first_vertex = 0;
        m_params.vertex_count = capacity;
    }
 
    if (m_params.vertex_count == 0)
        return false;
 
    m_params.time = elapsed();
    m_params.transform = geometry_transform(buffer);
 
    MF_RT_TRACE(Journal::Component::Buffers, Journal::Context::BufferProcessing,
        "VertexFieldProcessor dispatch: [{}, {}) of {} records, stride {} words, t={:.3f}",
        m_params.first_vertex,
        m_params.first_vertex + m_params.vertex_count,
        capacity,
        m_params.stride_words,
        m_params.time);
 
    if (m_operator->uses_params()) {
        const glm::vec4& params = m_operator->get_params();
        set_push_constant_data(ParamsBlock { m_params, { params.x, params.y, params.z, params.w } });
    } else {
        set_push_constant_data(m_params);
    }
    return true;
}

References buffer, buffer_capacity(), MayaFlux::Journal::BufferProcessing, MayaFlux::Journal::Buffers, elapsed(), MayaFlux::Buffers::VertexFieldProcessor::RangeParams::first_vertex, m_explicit_count, m_explicit_first, m_operator, m_params, m_range_set, MF_RT_ERROR, MF_RT_TRACE, MayaFlux::Buffers::ShaderProcessor::set_push_constant_data(), MayaFlux::Buffers::VertexFieldProcessor::RangeParams::stride_words, sync_revision(), MayaFlux::Buffers::VertexFieldProcessor::RangeParams::time, MayaFlux::Buffers::VertexFieldProcessor::RangeParams::transform, and MayaFlux::Buffers::VertexFieldProcessor::RangeParams::vertex_count.

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