resolve_vertex_layout()

MAYAFLUX_API std::optional< Kakshya::VertexLayout > MayaFlux::Buffers::resolve_vertex_layout

(

const std::shared_ptr< VKBuffer > &

source

)

Resolve the vertex extent of a buffer's primary storage for reading.

Parameters

source

Initialized buffer carrying a vertex layout.

Returns

The buffer's layout when it has a nonzero stride and count and vertex_count * stride_bytes fits inside the allocation; nullopt otherwise.

vertex_count is whatever the layout declares. On buffers whose geometry is generated on the GPU it may describe capacity rather than live vertices.

Definition at line 422 of file StagingUtils.cpp.

{
    if (!source || !source->is_initialized()) {
        return std::nullopt;
    }
 
    auto layout = source->get_vertex_layout();
    if (!layout || layout->stride_bytes == 0 || layout->vertex_count == 0
        || layout->vertex_count > source->get_size_bytes() / layout->stride_bytes) {
        return std::nullopt;
    }
 
    return layout;
}

Referenced by MayaFlux::Buffers::DataReadProcessor::read_vertices().

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