bind_push_constant() [2/2]

template<typename T >

void MayaFlux::Buffers::FormaBindingsProcessor::bind_push_constant ( const std::string &  name, std::shared_ptr< Portal::Forma::MappedState< T > >  state, std::function< float(T)>  project, uint32_t  offset, size_t  size = sizeof(float)  )

inline

Bind a MappedState<T> to a push constant slot on an external ShaderProcessor.

Parameters

name	Logical binding name for introspection and unbind.
state	MappedState whose value is read each graphics tick.
project	Projection from T to float. Called every tick. the value at offset. Any subclass is valid.
offset	Byte offset in the target's push constant struct.
size	Byte width of the written value. Defaults to sizeof(float).

Template Parameters

T	MappedState value type.

Definition at line 128 of file FormaBindingsProcessor.hpp.

    {
        if (!state) {
            MF_ERROR(Journal::Component::Buffers, Journal::Context::BufferProcessing,
                "FormaBindingsProcessor::bind_push_constant: null state for '{}'", name);
            return;
        }
 
        auto& b = m_bindings[name];
        b.kind = TargetKind::PUSH_CONSTANT;
        b.reader = [s = std::move(state), p = std::move(project)]() {
            return p(s->value);
        };
        b.pc = PushConstantTarget { .offset = offset, .size = size };
        b.desc.reset();
    }

References b, MF_ERROR, and MayaFlux::Buffers::FormaBindingsProcessor::PushConstantTarget::offset.