submit_read()

bool MayaFlux::Buffers::DataReadProcessor::submit_read ( PendingRead &  pending, std::shared_ptr< VKBuffer > &  staging, size_t  available_bytes, size_t  byte_count, bool  mapped, bool  transferable  )

staticprivate

Definition at line 416 of file DataReadProcessor.cpp.

{
    if (byte_count == 0) {
        byte_count = available_bytes;
    }
 
    if (byte_count > available_bytes || !pending.handle.buffer) {
        MF_RT_ERROR(Journal::Component::Buffers, Journal::Context::BufferProcessing,
            "DataReadProcessor requested {} bytes from a {} byte buffer",
            byte_count, available_bytes);
        return false;
    }
 
    pending.bytes.resize(byte_count);
 
    if (byte_count != 0 && mapped && pending.handle.mapped_ptr) {
        std::memcpy(pending.bytes.data(), pending.handle.mapped_ptr, byte_count);
    } else if (byte_count != 0) {
        if (!transferable) {
            MF_RT_ERROR(Journal::Component::Buffers, Journal::Context::BufferProcessing,
                "DataReadProcessor source has no mapped memory or transfer-source usage");
            return false;
        }
 
        pending.transfer = download_back_buffer_async(
            generation_slot(pending.handle), byte_count, staging);
 
        if (!pending.transfer) {
            MF_RT_ERROR(Journal::Component::Buffers, Journal::Context::BufferProcessing,
                "DataReadProcessor failed to submit a device-local read");
            return false;
        }
    }
 
    return true;
}

References MayaFlux::Portal::Graphics::GpuBufferHandle::buffer, MayaFlux::Journal::BufferProcessing, MayaFlux::Journal::Buffers, MayaFlux::Buffers::DataReadProcessor::PendingRead::bytes, MayaFlux::Buffers::download_back_buffer_async(), MayaFlux::Buffers::generation_slot(), MayaFlux::Buffers::DataReadProcessor::PendingRead::handle, MayaFlux::Portal::Graphics::GpuBufferHandle::mapped_ptr, MF_RT_ERROR, and MayaFlux::Buffers::DataReadProcessor::PendingRead::transfer.

Referenced by read_back_buffer(), read_buffer(), read_bytes(), read_field(), read_mesh(), and read_vertices().

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