translate_layout()

std::pair< std::vector< Core::VertexBinding >, std::vector< Core::VertexAttribute > > MayaFlux::Portal::Graphics::VertexLayoutTranslator::translate_layout ( const Kakshya::VertexLayout &  layout, uint32_t  binding_index = 0  )

static

Translate a semantic vertex layout to Vulkan binding/attribute descriptions.

Parameters

layout	Semantic vertex layout from VKBuffer
binding_index	Vulkan binding point (usually 0)

Returns

Pair of (bindings, attributes) ready for VkPipelineVertexInputStateCreateInfo

Definition at line 47 of file LayoutTranslator.cpp.

{
    if (layout.attributes.empty()) {
        MF_ERROR(Journal::Component::Portal, Journal::Context::Rendering,
            "Cannot translate empty vertex layout");
        return {};
    }
 
    if (layout.vertex_count == 0) {
        MF_WARN(Journal::Component::Portal, Journal::Context::Rendering,
            "Vertex layout has zero vertices");
    }
 
    if (layout.stride_bytes == 0) {
        MF_ERROR(Journal::Component::Portal, Journal::Context::Rendering,
            "Vertex layout has zero stride");
        return {};
    }
 
    std::vector<Core::VertexBinding> bindings;
    bindings.emplace_back(
        binding_index,
        layout.stride_bytes,
        false,
        vk::VertexInputRate::eVertex);
 
    std::vector<Core::VertexAttribute> attributes;
    uint32_t location = 0;
 
    for (const auto& attr : layout.attributes) {
        attributes.emplace_back(
            location,
            binding_index,
            modality_to_vk_format(attr.component_modality),
            attr.offset_in_vertex);
 
        MF_TRACE(Journal::Component::Portal, Journal::Context::Rendering,
            "Vertex attribute: location={}, format={}, offset={}",
            location,
            vk::to_string(attributes.back().format),
            attr.offset_in_vertex);
 
        location++;
    }
 
    MF_INFO(Journal::Component::Portal, Journal::Context::Rendering,
        "Translated vertex layout: {} vertices, {} bytes stride, {} attributes",
        layout.vertex_count, layout.stride_bytes, layout.attributes.size());
 
    return { bindings, attributes };
}

References MayaFlux::Kakshya::VertexLayout::attributes, MF_ERROR, MF_INFO, MF_TRACE, MF_WARN, modality_to_vk_format(), MayaFlux::Journal::Portal, MayaFlux::Journal::Rendering, MayaFlux::Kakshya::VertexLayout::stride_bytes, and MayaFlux::Kakshya::VertexLayout::vertex_count.

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