◆ initialize_pipeline()

void MayaFlux::Buffers::RenderProcessor::initialize_pipeline ( const std::shared_ptr< VKBuffer > & buffer )
overrideprotectedvirtual
Implements MayaFlux::Buffers::ShaderProcessor.
Definition at line 178 of file RenderProcessor.cpp.
{
    if (m_shader_id == Portal::Graphics::INVALID_SHADER) {
        MF_ERROR(Journal::Component::Buffers, Journal::Context::BufferProcessing,
            "Vertex shader not loaded");
        return;
    }
 
    if (m_fragment_shader_id == Portal::Graphics::INVALID_SHADER) {
        MF_ERROR(Journal::Component::Buffers, Journal::Context::BufferProcessing,
            "Fragment shader not loaded");
        return;
    }
 
    if (!m_target_window) {
        MF_RT_ERROR(Journal::Component::Buffers, Journal::Context::BufferProcessing,
            "Target window not set");
        return;
    }
 
    auto& flow = Portal::Graphics::get_render_flow();
 
    Portal::Graphics::get_render_flow().register_window_for_rendering(m_target_window);
 
    Portal::Graphics::RenderPipelineConfig pipeline_config;
    pipeline_config.vertex_shader = m_shader_id;
    pipeline_config.fragment_shader = m_fragment_shader_id;
    pipeline_config.geometry_shader = m_geometry_shader_id;
    pipeline_config.tess_control_shader = m_tess_control_shader_id;
    pipeline_config.tess_eval_shader = m_tess_eval_shader_id;
 
    pipeline_config.topology = m_primitive_topology;
    pipeline_config.rasterization.polygon_mode = m_polygon_mode;
    pipeline_config.rasterization.cull_mode = m_cull_mode;
 
    if (m_blend_attachment.has_value()) {
        pipeline_config.blend_attachments.push_back(m_blend_attachment.value());
    } else {
        pipeline_config.blend_attachments.emplace_back();
    }
 
    pipeline_config.depth_stencil = m_depth_stencil;
 
    if (m_buffer_info.find(buffer) == m_buffer_info.end()) {
        if (buffer->has_vertex_layout()) {
            auto vertex_layout = buffer->get_vertex_layout();
            if (vertex_layout.has_value()) {
                m_buffer_info[buffer] = {
                    .semantic_layout = vertex_layout.value(),
                    .use_reflection = false
                };
            }
        }
    }
 
    const Kakshya::VertexLayout* local_layout = get_or_cache_vertex_layout(m_buffer_info, buffer);
    if (!local_layout) {
        MF_DEBUG(Journal::Component::Buffers, Journal::Context::BufferProcessing,
            "initialize_pipeline: layout not yet available, deferring");
        return;
    }
 
    pipeline_config.semantic_vertex_layout = *local_layout;
    pipeline_config.use_vertex_shader_reflection = m_buffer_info[buffer].use_reflection;
 
    const auto& staging = buffer->get_pipeline_context().push_constant_staging;
    if (!staging.empty()) {
        pipeline_config.push_constant_size = staging.size();
    } else {
        pipeline_config.push_constant_size = std::max(m_config.push_constant_size, m_push_constant_data.size());
    }
 
    auto& descriptor_bindings = buffer->get_pipeline_context().descriptor_buffer_bindings;
    std::map<std::pair<uint32_t, uint32_t>, Portal::Graphics::DescriptorBindingInfo> unified_bindings;
 
    for (const auto& binding : descriptor_bindings) {
        unified_bindings[{ binding.set, binding.binding }] = binding;
    }
 
    for (const auto& [name, binding] : m_config.bindings) {
        auto key = std::make_pair(binding.set, binding.binding);
        if (unified_bindings.find(key) == unified_bindings.end()) {
            unified_bindings[key] = Portal::Graphics::DescriptorBindingInfo {
                .set = binding.set,
                .binding = binding.binding,
                .type = binding.type,
                .buffer_info = {},
                .name = name
            };
        }
    }
 
    std::map<uint32_t, std::vector<Portal::Graphics::DescriptorBindingInfo>> bindings_by_set;
    for (const auto& [key, binding] : unified_bindings) {
        bindings_by_set[binding.set].push_back(binding);
    }
 
    for (const auto& [set_index, set_bindings] : bindings_by_set) {
        pipeline_config.descriptor_sets.push_back(set_bindings);
    }
 
    vk::Format swapchain_format = static_cast<vk::Format>(
        m_display_service->get_swapchain_format(m_target_window));
 
    vk::Format depth_format = m_depth_enabled
        ? vk::Format::eD32Sfloat
        : vk::Format::eUndefined;
 
    m_pipeline_id = flow.create_pipeline(pipeline_config, { swapchain_format }, depth_format);
 
    if (m_pipeline_id == Portal::Graphics::INVALID_RENDER_PIPELINE) {
        MF_ERROR(Journal::Component::Buffers, Journal::Context::BufferProcessing,
            "Failed to create render pipeline");
        return;
    }
 
    if (m_depth_enabled) {
        buffer->set_needs_depth_attachment(true);
    }
 
    m_needs_descriptor_rebuild = !pipeline_config.descriptor_sets.empty() && m_descriptor_set_ids.empty();
    m_needs_pipeline_rebuild = false;
 
    on_pipeline_created(m_pipeline_id);
}
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