AmdPinnedBuffers.hpp

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#pragma once
 
#include <score_plugin_gfx_export.h>
 
#include <cstddef>
#include <cstdint>
 
class QOpenGLContext;
 
namespace score::gfx::interop
{
 
namespace amd_gl_tokens
{
constexpr unsigned int EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD = 0x9160;
constexpr unsigned int BUS_ADDRESSABLE_MEMORY_AMD = 0x9168;
constexpr unsigned int EXTERNAL_VIRTUAL_MEMORY_AMD = 0x9161;
constexpr unsigned int EXTERNAL_PHYSICAL_MEMORY_AMD = 0x9162;
} // namespace amd_gl_tokens
 
struct SCORE_PLUGIN_GFX_EXPORT AmdPinnedBuffers
{
  // -- Presence flags --------------------------------------------------
 
  bool hasPinnedMemory{};
  bool hasBusAddressable{};
  bool hasExternalVirtualMemory{};
  bool hasExternalPhysicalMemory{};
 
  // -- Resolved entry points (bus-addressable only) -------------------
 
  using FN_MakeBuffersResident
      = void (*)(int /*n*/, const unsigned int* /*buffers*/,
                 uint64_t* /*busAddr*/, uint64_t* /*markerAddr*/);
  FN_MakeBuffersResident makeBuffersResident{};
 
  using FN_BufferBusAddress
      = void (*)(unsigned int /*target*/, std::ptrdiff_t /*size*/,
                 uint64_t /*busAddr*/, uint64_t /*markerAddr*/);
  FN_BufferBusAddress bufferBusAddress{};
 
  // -- API ------------------------------------------------------------
 
  bool tryInit(QOpenGLContext* ctx = nullptr) noexcept;
 
  bool any() const noexcept
  {
    return hasPinnedMemory || hasBusAddressable || hasExternalVirtualMemory
           || hasExternalPhysicalMemory;
  }
 
  unsigned int createPinnedBuffer(
      unsigned int target, std::size_t size_bytes, void* host_ptr,
      unsigned int usage) noexcept;
 
  unsigned int createBusAddressableBuffer(
      std::size_t size_bytes, unsigned int usage, uint64_t* out_busAddr,
      uint64_t* out_markerAddr) noexcept;
};
 
} // namespace score::gfx::interop