pack_gpu_value()

template<GpuFormatElement T>

bool MayaFlux::Kakshya::pack_gpu_value ( GpuDataFormat  dst, const T &  value, std::span< std::byte >  out  )

noexcept

Writes a typed value into out as one element of dst.

The value's component count must equal that of dst, so a glm::vec3 packs into VEC3_F32 or VEC3_F64 but not into FLOAT32.

Parameters

dst	Destination format.
value	Source value.
out	Destination bytes, at least gpu_data_format_bytes(dst).

Returns

False if the component counts differ or out is too small.

Definition at line 249 of file GpuDataFormat.hpp.

{
    using V = std::remove_cvref_t<T>;
 
    std::array<double, 16> components {};
    size_t count = 0;
 
    if constexpr (ArithmeticData<V>) {
        components[count++] = static_cast<double>(value);
    } else if constexpr (GlmMatrixType<V>) {
        for (int c = 0; c < 4; ++c) {
            for (int r = 0; r < 4; ++r) {
                components[count++] = static_cast<double>(value[c][r]);
            }
        }
    } else {
        for (int i = 0; i < static_cast<int>(glm_component_count<V>()); ++i) {
            components[count++] = static_cast<double>(value[i]);
        }
    }
 
    return pack_gpu_components(dst, std::span<const double>(components.data(), count), out);
}

References count, dst, out, pack_gpu_components(), and value.

Referenced by MayaFlux::Buffers::FormaBindingsProcessor::flush_push_constant().

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