textureObjectRegistry.h

//
// Copyright 2020 Pixar
//
// Licensed under the terms set forth in the LICENSE.txt file available at
// https://openusd.org/license.
//
#ifndef PXR_IMAGING_HD_ST_TEXTURE_OBJECT_REGISTRY_H
#define PXR_IMAGING_HD_ST_TEXTURE_OBJECT_REGISTRY_H
 
#include "pxr/pxr.h"
#include "pxr/imaging/hdSt/api.h"
#include "pxr/imaging/hdSt/enums.h"
#include "pxr/imaging/hd/instanceRegistry.h"
 
#include <tbb/concurrent_vector.h>
#include <vector>
#include <atomic>
 
PXR_NAMESPACE_OPEN_SCOPE
 
using HdStTextureObjectSharedPtr =
    std::shared_ptr<class HdStTextureObject>;
using HdStTextureObjectPtr =
    std::weak_ptr<class HdStTextureObject>;
using HdStTextureObjectPtrVector =
    std::vector<HdStTextureObjectPtr>;
class HdStResourceRegistry;
class HdStTextureIdentifier;
 
 
class HdSt_TextureObjectRegistry final
{
public:
    HDST_API
    explicit HdSt_TextureObjectRegistry(HdStResourceRegistry * registry);
    HDST_API
    ~HdSt_TextureObjectRegistry();
 
    HDST_API
    HdStTextureObjectSharedPtr AllocateTextureObject(
        const HdStTextureIdentifier &textureId,
        HdStTextureType textureType);
 
    HDST_API
    std::set<HdStTextureObjectSharedPtr> Commit();
 
    HDST_API
    void GarbageCollect();
 
    HDST_API
    void MarkTextureFilePathDirty(const TfToken &filePath);
 
    HDST_API
    void MarkTextureObjectDirty(
        HdStTextureObjectPtr const &textureObject);
 
    HDST_API
    HdStResourceRegistry * GetResourceRegistry() const {
        return _resourceRegistry;
    }
 
    int64_t GetTotalTextureMemory() const {
        return _totalTextureMemory;
    }
 
    HDST_API
    void AdjustTotalTextureMemory(int64_t memDiff);
 
    size_t GetNumberOfTextureObjects() const {
        return _textureObjectRegistry.size();
    }
 
private:
    HdStTextureObjectSharedPtr _MakeTextureObject(
        const HdStTextureIdentifier &textureId,
        HdStTextureType textureType);
 
    std::atomic<int64_t> _totalTextureMemory;
 
    // Registry for texture and sampler objects.
    HdInstanceRegistry<HdStTextureObjectSharedPtr>
        _textureObjectRegistry;
 
    // Map file paths to texture objects for quick invalidation
    // by file path.
    std::unordered_map<TfToken, HdStTextureObjectPtrVector,
                       TfToken::HashFunctor>
        _filePathToTextureObjects;
 
    // File paths for which GPU resources need to be (re-)loaded
    tbb::concurrent_vector<TfToken> _dirtyFilePaths;
 
    // Texture for which GPU resources need to be (re-)loaded
    tbb::concurrent_vector<HdStTextureObjectPtr> _dirtyTextures;
 
    HdStResourceRegistry *_resourceRegistry;
};
 
PXR_NAMESPACE_CLOSE_SCOPE
 
#endif