ptexTextureObject.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_PTEX_TEXTURE_OBJECT_H
#define PXR_IMAGING_HD_ST_PTEX_TEXTURE_OBJECT_H
 
#include "pxr/pxr.h"
#include "pxr/imaging/hdSt/api.h"
#include "pxr/imaging/hdSt/textureObject.h"
 
#include "pxr/imaging/hgi/handle.h"
 
#include "pxr/base/gf/vec2i.h"
#include "pxr/base/gf/vec3i.h"
 
#ifdef PXR_PTEX_SUPPORT_ENABLED
#include "pxr/imaging/hdSt/ptexMipmapTextureLoader.h"
#endif
 
PXR_NAMESPACE_OPEN_SCOPE
 
HDST_API bool HdStIsSupportedPtexTexture(std::string const & imageFilePath);
 
enum HgiFormat : int;
using HgiTextureHandle = HgiHandle<class HgiTexture>;
 
class HdStPtexTextureObject final : public HdStTextureObject
{
public:
    HDST_API
    HdStPtexTextureObject(
        const HdStTextureIdentifier &textureId,
        HdSt_TextureObjectRegistry *textureObjectRegistry);
 
    HDST_API
    ~HdStPtexTextureObject() override;
 
    HgiTextureHandle GetTexelTexture() const { return _texelTexture; }
 
    HgiTextureHandle GetLayoutTexture() const { return _layoutTexture; }
 
    HDST_API
    bool IsValid() const override;
 
    HDST_API
    HdStTextureType GetTextureType() const override;
 
    HDST_API
    size_t GetCommittedSize() const override;
 
protected:
    HDST_API
    void _Load() override;
 
    HDST_API
    void _Commit() override;
 
private:
    HgiFormat _format;
    GfVec3i _texelDimensions;
    int _texelLayers;
    size_t _texelDataSize;
    GfVec2i _layoutDimensions;
    size_t _layoutDataSize;
 
    std::unique_ptr<uint8_t[]> _texelData;
    std::unique_ptr<uint8_t[]> _layoutData;
 
    HgiTextureHandle _texelTexture;
    HgiTextureHandle _layoutTexture;
 
    void _DestroyTextures();
};
 
template<>
struct HdSt_TypedTextureObjectHelper<HdStTextureType::Ptex> {
    using type = HdStPtexTextureObject;
};
 
PXR_NAMESPACE_CLOSE_SCOPE
 
#endif