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IVirtualTexture.h
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// Copyright (C) 2018-2020 - DevSH Graphics Programming Sp. z O.O.
// This file is part of the "Nabla Engine".
// For conditions of distribution and use, see copyright notice in nabla.h
#ifndef __NBL_ASSET_I_VIRTUAL_TEXTURE_H_INCLUDED__
#define __NBL_ASSET_I_VIRTUAL_TEXTURE_H_INCLUDED__
#include <functional>
#include "nbl/core/memory/memory.h"
#include "nbl/core/alloc/GeneralpurposeAddressAllocator.h"
#include "nbl/core/alloc/PoolAddressAllocator.h"
#include "nbl/core/alloc/address_allocator_traits.h"
#include "nbl/asset/ISampler.h"
#include "nbl/asset/IImageView.h"
#include "nbl/asset/IDescriptorSetLayout.h"
#include "nbl/asset/filters/CPaddedCopyImageFilter.h"
#include "nbl/asset/filters/CFillImageFilter.h"
#include "nbl/builtin/hlsl/math/morton.hlsl"
namespace nbl::asset
{
class IVirtualTextureBase
{
public:
_NBL_STATIC_INLINE_CONSTEXPR uint32_t MAX_PAGE_TABLE_LAYERS = 256u;
#include "nbl/nblpack.h"
//! std430-compatible layout
struct SPrecomputedData
{
uint32_t pgtab_sz_log2;
float vtex_sz_rcp;
float layer_to_phys_pg_tex_sz_rcp[MAX_PAGE_TABLE_LAYERS];
uint32_t layer_to_sampler_ix[MAX_PAGE_TABLE_LAYERS];
} PACK_STRUCT;
#include "nbl/nblunpack.h"
using physical_tiles_per_dim_log2_callback_t = std::function<uint32_t(E_FORMAT_CLASS)>;
};
template <typename image_view_t, typename sampler_t>
class IVirtualTexture : public core::IReferenceCounted, public IVirtualTextureBase
{
using this_type = IVirtualTexture<image_view_t, sampler_t>;
protected:
//! SPhysPgOffset is what is stored in texels of page table!
struct SPhysPgOffset
{
_NBL_STATIC_INLINE_CONSTEXPR uint32_t invalid_addr = 0xffffu;
_NBL_STATIC_INLINE_CONSTEXPR uint32_t PAGE_ADDR_BITLENGTH = 16u;
_NBL_STATIC_INLINE_CONSTEXPR uint32_t PAGE_ADDR_MASK = (1u<<PAGE_ADDR_BITLENGTH)-1u;
_NBL_STATIC_INLINE_CONSTEXPR uint32_t PAGE_ADDR_X_BITS = 4u;
_NBL_STATIC_INLINE_CONSTEXPR uint32_t PAGE_ADDR_X_MASK = (1u<<PAGE_ADDR_X_BITS)-1u;
_NBL_STATIC_INLINE_CONSTEXPR uint32_t PAGE_ADDR_Y_BITS = 4u;
_NBL_STATIC_INLINE_CONSTEXPR uint32_t PAGE_ADDR_Y_MASK = (1u<<PAGE_ADDR_Y_BITS)-1u;
_NBL_STATIC_INLINE_CONSTEXPR uint32_t PAGE_ADDR_LAYER_SHIFT = PAGE_ADDR_BITLENGTH - PAGE_ADDR_X_BITS - PAGE_ADDR_Y_BITS;
inline uint32_t x() const { return addr & PAGE_ADDR_X_MASK; }
inline uint32_t y() const { return (addr >> PAGE_ADDR_X_BITS)& PAGE_ADDR_Y_MASK; }
inline uint32_t layer() const { return (addr & PAGE_ADDR_MASK) >> PAGE_ADDR_LAYER_SHIFT; }
inline bool valid() const { return (addr & PAGE_ADDR_MASK) != invalid_addr; }
inline SPhysPgOffset mipTailAddr() const { return addr >> PAGE_ADDR_BITLENGTH; }
inline bool hasMipTailAddr() const { return mipTailAddr().valid(); }
SPhysPgOffset(uint32_t _addr) : addr(_addr) {}
//upper 16 bits are used for address of mip-tail page
uint32_t addr;
};
uint32_t neededPageCountForSide(uint32_t _sideExtent, uint32_t _level) const
{
return (((_sideExtent+(1u<<_level)-1u)>>_level) + m_pgSzxy-1u) / m_pgSzxy;
}
public:
_NBL_STATIC_INLINE_CONSTEXPR uint32_t MAX_PAGE_TABLE_EXTENT_LOG2 = 8u;
_NBL_STATIC_INLINE_CONSTEXPR uint32_t MAX_PHYSICAL_PAGE_SIZE_LOG2 = 9u;
struct SMiptailPacker
{
struct rect
{
int x, y, mx, my;
inline core::vector2du32_SIMD extent() const { return core::vector2du32_SIMD(mx, my)+core::vector2du32_SIMD(1u)-core::vector2du32_SIMD(x,y); }
};
static inline bool computeMiptailOffsets(rect* res, int log2SIZE, int padding);
};
#include "nbl/nblpack.h"
//must be 64bit
template <typename CRTP>
struct NBL_FORCE_EBO STextureData
{
enum E_WRAP_MODE
{
EWM_REPEAT = 0b00,
EWM_CLAMP = 0b01,
EWM_MIRROR = 0b10,
EWM_INVALID = 0b11
};
static E_WRAP_MODE ETC_to_EWM(ISampler::E_TEXTURE_CLAMP _etc)
{
switch (_etc)
{
case ISampler::ETC_REPEAT:
return EWM_REPEAT;
case ISampler::ETC_CLAMP_TO_EDGE: [[fallthrough]];
case ISampler::ETC_CLAMP_TO_BORDER:
return EWM_CLAMP;
case ISampler::ETC_MIRROR: [[fallthrough]];
case ISampler::ETC_MIRROR_CLAMP_TO_EDGE: [[fallthrough]];
case ISampler::ETC_MIRROR_CLAMP_TO_BORDER:
return EWM_MIRROR;
default:
return EWM_INVALID;
}
}
static ISampler::E_TEXTURE_CLAMP EWM_to_ETC(E_WRAP_MODE _ewm)
{
switch (_ewm)
{
case EWM_INVALID: [[fallthrough]];
case EWM_REPEAT:
return ISampler::ETC_REPEAT;
case EWM_CLAMP:
return ISampler::ETC_CLAMP_TO_EDGE;
case EWM_MIRROR:
return ISampler::ETC_MIRROR;
}
}
//1st dword
uint64_t origsize_x : 16;
uint64_t origsize_y : 16;
//2nd dword
uint64_t pgTab_x : 8;
uint64_t pgTab_y : 8;
uint64_t pgTab_layer : 8;
uint64_t maxMip : 4; // this is number of mip-maps plus 1 that the texture will have in the virtual texture (before the mip-tail)
uint64_t wrap_x : 2;
uint64_t wrap_y : 2;
static CRTP invalid()
{
CRTP inv;
memset(&inv,0,sizeof(inv));
inv.wrap_x = EWM_INVALID;
inv.wrap_y = EWM_INVALID;
return inv;
}
static bool is_invalid(const CRTP& _td)
{
return _td.wrap_x==EWM_INVALID||_td.wrap_y==EWM_INVALID;
}
protected:
STextureData() = default;
} PACK_STRUCT;
#include "nbl/nblunpack.h"
struct NBL_FORCE_EBO SMasterTextureData : STextureData<SMasterTextureData>
{
friend this_type;
private:
SMasterTextureData() = default;
};
static_assert(sizeof(SMasterTextureData)==sizeof(uint64_t), "SMasterTextureData is not 64bit!");
struct NBL_FORCE_EBO SViewAliasTextureData : STextureData<SViewAliasTextureData>
{
friend this_type;
private:
SViewAliasTextureData() = default;
};
static_assert(sizeof(SViewAliasTextureData)==sizeof(uint64_t), "SViewAliasTextureData is not 64bit!");
protected:
static SMasterTextureData createMasterTextureData() { return SMasterTextureData(); }
static SViewAliasTextureData createAliasTextureData() { return SViewAliasTextureData(); }
using image_t = typename decltype(image_view_t::SCreationParams::image)::pointee;
using page_tab_offset_t = core::vector3du32_SIMD;
static page_tab_offset_t page_tab_offset_invalid() { return page_tab_offset_t(~0u,~0u,~0u); }
uint32_t countNeededPages(const VkExtent3D& _extent, uint32_t _baseLevel) const
{
uint32_t levels = countLevelsTakingAtLeastOnePage(_extent, _baseLevel);
uint32_t pages = 1u; // mip-tail
for (uint32_t i = 0u; i < levels; ++i)
{
uint32_t w = neededPageCountForSide(_extent.width, i + _baseLevel);
uint32_t h = neededPageCountForSide(_extent.height, i + _baseLevel);
pages += w*h;
}
return pages;
}
SMasterTextureData offsetToTextureData(const page_tab_offset_t& _offset, const VkExtent3D& _extent, uint32_t _mipCount, ISampler::E_TEXTURE_CLAMP _wrapu, ISampler::E_TEXTURE_CLAMP _wrapv)
{
auto texData = createMasterTextureData();
texData.origsize_x = _extent.width;
texData.origsize_y = _extent.height;
texData.pgTab_x = _offset.x;
texData.pgTab_y = _offset.y;
texData.pgTab_layer = _offset.z;
const uint32_t maxMip = _mipCount-m_pgSzxy_log2;
assert(static_cast<int32_t>(maxMip) >= 0); // only textures of size at least half page size must be packed
texData.maxMip = maxMip;
texData.wrap_x = SMasterTextureData::ETC_to_EWM(_wrapu);
texData.wrap_y = SMasterTextureData::ETC_to_EWM(_wrapv);
return texData;
}
uint32_t computeSquareSz(uint32_t _w, uint32_t _h, uint32_t _baseLevel = 0u)
{
const uint32_t w = neededPageCountForSide(_w, _baseLevel);
const uint32_t h = neededPageCountForSide(_h, _baseLevel);
return core::roundUpToPoT(std::max<uint32_t>(w, h));
}
ISampler::SParams getPageTableSamplerParams() const
{
ISampler::SParams params;
params.AnisotropicFilter = 0u;
params.BorderColor = ISampler::ETBC_FLOAT_OPAQUE_WHITE;
params.CompareEnable = false;
params.CompareFunc = ISampler::ECO_NEVER;
params.LodBias = 0.f;
params.MaxLod = 10000.f;
params.MinLod = 0.f;
params.MaxFilter = ISampler::ETF_NEAREST;
params.MinFilter = ISampler::ETF_NEAREST;
params.MipmapMode = ISampler::ESMM_NEAREST;
params.TextureWrapU = params.TextureWrapV = params.TextureWrapW = ISampler::ETC_CLAMP_TO_EDGE;
return params;
}
ISampler::SParams getPhysicalStorageFloatSamplerParams() const
{
ISampler::SParams params;
params.AnisotropicFilter = m_tilePadding ? hlsl::findMSB(m_tilePadding<<1) : 0u;
params.BorderColor = ISampler::ETBC_FLOAT_OPAQUE_WHITE;
params.CompareEnable = false;
params.CompareFunc = ISampler::ECO_NEVER;
params.LodBias = 0.f;
params.MaxLod = 0.f;
params.MinLod = 0.f;
params.MaxFilter = m_tilePadding ? ISampler::ETF_LINEAR : ISampler::ETF_NEAREST;
params.MinFilter = m_tilePadding ? ISampler::ETF_LINEAR : ISampler::ETF_NEAREST;
params.MipmapMode = ISampler::ESMM_NEAREST;
params.TextureWrapU = params.TextureWrapV = params.TextureWrapW = ISampler::ETC_CLAMP_TO_EDGE;
return params;
}
ISampler::SParams getPhysicalStorageNonFloatSamplerParams() const
{
ISampler::SParams params;
params.AnisotropicFilter = 0u; // TODO: don't apply padding to uint and int textures (is it even possible with all the view aliasing going on?)
params.BorderColor = ISampler::ETBC_FLOAT_OPAQUE_WHITE;
params.CompareEnable = false;
params.CompareFunc = ISampler::ECO_NEVER;
params.LodBias = 0.f;
params.MaxLod = 0.f;
params.MinLod = 0.f;
params.MaxFilter = ISampler::ETF_NEAREST;
params.MinFilter = ISampler::ETF_NEAREST;
params.MipmapMode = ISampler::ESMM_NEAREST;
params.TextureWrapU = params.TextureWrapV = params.TextureWrapW = ISampler::ETC_CLAMP_TO_EDGE;
return params;
}
virtual core::smart_refctd_ptr<sampler_t> createSampler(const ISampler::SParams& _params) const = 0;
core::smart_refctd_ptr<sampler_t> getPageTableSampler() const
{
if (!m_pageTableSampler)
m_pageTableSampler = createSampler(getPageTableSamplerParams());
return m_pageTableSampler;
}
core::smart_refctd_ptr<sampler_t> getPhysicalStorageFloatSampler() const
{
if (!m_physicalStorageFloatSampler)
m_physicalStorageFloatSampler = createSampler(getPhysicalStorageFloatSamplerParams());
return m_physicalStorageFloatSampler;
}
core::smart_refctd_ptr<sampler_t> getPhysicalStorageNonFloatSampler() const
{
if (!m_physicalStorageNonFloatSampler)
m_physicalStorageNonFloatSampler = createSampler(getPhysicalStorageNonFloatSamplerParams());
return m_physicalStorageNonFloatSampler;
}
uint32_t getMaxAllocationPageCount() const
{
return 1u << (2u * m_pgtabSzxy_log2);
}
_NBL_STATIC_INLINE_CONSTEXPR uint32_t INVALID_SAMPLER_INDEX = 0xdeadbeefu;
_NBL_STATIC_INLINE_CONSTEXPR uint32_t INVALID_LAYER_INDEX = 0xdeadbeefu;
uint32_t findFreePageTableLayer() const
{
auto begin = std::begin(m_precomputed.layer_to_sampler_ix);
auto end = std::end(m_precomputed.layer_to_sampler_ix);
auto found = std::find(begin, end, INVALID_SAMPLER_INDEX);
if (found == end)
return INVALID_LAYER_INDEX;
return found-m_precomputed.layer_to_sampler_ix;
}
core::vector2du32_SIMD getMaxAllocatableTextureSize() const
{
return (core::vector2du32_SIMD(1u<<m_pgtabSzxy_log2)*m_pgSzxy) & core::vector2du32_SIMD(~0u,~0u,0u,0u);
}
bool isAllocatable(const VkExtent3D& _extent)
{
return (core::vector2du32_SIMD(&_extent.width)<=getMaxAllocatableTextureSize()).xyxy().all();
}
uint32_t countLevelsTakingAtLeastOnePage(const VkExtent3D& _extent, uint32_t _baseLevel = 0u) const
{
const uint32_t baseMaxDim = core::roundUpToPoT(core::max<uint32_t>(_extent.width, _extent.height))>>_baseLevel;
const int32_t lastFullMip = hlsl::findMSB(baseMaxDim-1u)+1 - static_cast<int32_t>(m_pgSzxy_log2);
//assert(lastFullMip<static_cast<int32_t>(m_pageTable->getCreationParameters().mipLevels));
return core::max<int32_t>(lastFullMip+1, 0);
}
//this is not static only because it has to call virtual member function
core::smart_refctd_ptr<image_t> createPageTable(uint32_t _pgTabSzxy_log2, uint32_t _pgTabLayers, uint32_t _pgSzxy_log2, uint32_t _maxAllocatableTexSz_log2)
{
assert(_pgTabSzxy_log2<=MAX_PAGE_TABLE_EXTENT_LOG2);//otherwise STextureData encoding falls apart
assert(_pgTabLayers<=MAX_PAGE_TABLE_LAYERS);
_pgTabLayers = std::max(_pgTabLayers, 1u);
const uint32_t pgTabSzxy = 1u<<_pgTabSzxy_log2;
typename image_t::SCreationParams params;
params.arrayLayers = _pgTabLayers; // page table must always be present
params.extent = {pgTabSzxy,pgTabSzxy,1u};
params.format = EF_R16G16_UINT;
params.mipLevels = std::max<int32_t>(static_cast<int32_t>(_maxAllocatableTexSz_log2-_pgSzxy_log2+1u), 1);
params.samples = IImage::E_SAMPLE_COUNT_FLAGS::ESCF_1_BIT;
params.type = IImage::ET_2D;
params.flags = static_cast<IImage::E_CREATE_FLAGS>(0);
auto pgtab = createPageTableImage(std::move(params));
if constexpr(std::is_same<image_t,ICPUImage>::value)
{
const uint32_t texelSz = getTexelOrBlockBytesize(pgtab->getCreationParameters().format);
auto regions = core::make_refctd_dynamic_array<core::smart_refctd_dynamic_array<ICPUImage::SBufferCopy>>(pgtab->getCreationParameters().mipLevels);
uint32_t bufOffset = 0u;
for (uint32_t i = 0u; i < pgtab->getCreationParameters().mipLevels; ++i)
{
const uint32_t tilesPerLodDim = pgTabSzxy>>i;
const uint32_t regionSz = _pgTabLayers*tilesPerLodDim*tilesPerLodDim*texelSz;
auto& region = (*regions)[i];
region.bufferOffset = bufOffset;
region.bufferImageHeight = 0u;
region.bufferRowLength = tilesPerLodDim;
region.imageExtent = {tilesPerLodDim,tilesPerLodDim,1u};
region.imageOffset = {0,0,0};
region.imageSubresource.baseArrayLayer = 0u;
region.imageSubresource.layerCount = _pgTabLayers;
region.imageSubresource.mipLevel = i;
region.imageSubresource.aspectMask = static_cast<IImage::E_ASPECT_FLAGS>(0);
bufOffset += regionSz;
}
auto buf = core::make_smart_refctd_ptr<ICPUBuffer>(bufOffset);
#ifdef _NBL_DEBUG
uint32_t* bufptr = reinterpret_cast<uint32_t*>(buf->getPointer());
std::fill(bufptr, bufptr+bufOffset/sizeof(uint32_t), SPhysPgOffset::invalid_addr);
#endif
pgtab->setBufferAndRegions(std::move(buf), regions);
}
return pgtab;
}
void updatePrecomputedData(uint32_t _layer, uint32_t _smplrIndex, float _physTexRcpSz, E_FORMAT _format)
{
m_precomputed.layer_to_sampler_ix[_layer] = _smplrIndex;
m_precomputed.layer_to_phys_pg_tex_sz_rcp[_layer] = _physTexRcpSz;
m_layerToFormat[_layer] = _format;
m_precomputedWasUpdatedSinceLastQuery = true;
}
physical_tiles_per_dim_log2_callback_t m_physicalStorageExtentLog2CB;
const uint32_t m_pgSzxy;
const uint32_t m_pgSzxy_log2;
const uint32_t m_pgtabSzxy_log2;
const uint32_t m_tilePadding;
core::smart_refctd_ptr<image_t> m_pageTable;
mutable core::smart_refctd_ptr<image_view_t> m_pageTableView;
mutable core::smart_refctd_ptr<sampler_t> m_pageTableSampler;
mutable core::smart_refctd_ptr<sampler_t> m_physicalStorageFloatSampler;
mutable core::smart_refctd_ptr<sampler_t> m_physicalStorageNonFloatSampler;
using pg_tab_addr_alctr_t = core::GeneralpurposeAddressAllocator<uint32_t>;
std::array<pg_tab_addr_alctr_t, MAX_PAGE_TABLE_LAYERS> m_pageTableLayerAllocators;
uint8_t* m_pgTabAddrAlctr_reservedSpc = nullptr;
mutable bool m_precomputedWasUpdatedSinceLastQuery = true;
SPrecomputedData m_precomputed;
std::array<E_FORMAT, MAX_PAGE_TABLE_LAYERS> m_layerToFormat;
E_FORMAT getFormatInLayer(uint32_t _layer) const
{
return m_layerToFormat[_layer];
}
struct SamplerArray
{
struct Sampler
{
E_FORMAT format;
core::smart_refctd_ptr<image_view_t> view;
};
using range_t = core::SRange<const Sampler>;
core::vector<Sampler> views;
range_t getViews() const {
return views.size() ? range_t(views.data(),views.data()+views.size()) : range_t(nullptr,nullptr);
}
};
SamplerArray m_fsamplers, m_isamplers, m_usamplers;
//preallocated arrays for multi_free_addr()
core::smart_refctd_dynamic_array<uint32_t> m_addrsArray;
core::smart_refctd_dynamic_array<uint32_t> m_sizesArray;
class IVTResidentStorage : public core::IReferenceCounted
{
public:
using phys_pg_addr_alctr_t = core::PoolAddressAllocator<uint32_t>;
protected:
_NBL_STATIC_INLINE_CONSTEXPR uint32_t MAX_TILES_PER_DIM = std::min<uint32_t>(SPhysPgOffset::PAGE_ADDR_X_MASK,SPhysPgOffset::PAGE_ADDR_Y_MASK) + 1u;
_NBL_STATIC_INLINE_CONSTEXPR uint32_t MAX_LAYERS = (1u<<(SPhysPgOffset::PAGE_ADDR_BITLENGTH-SPhysPgOffset::PAGE_ADDR_LAYER_SHIFT));
virtual ~IVTResidentStorage()
{
if (m_alctrReservedSpace)
_NBL_ALIGNED_FREE(m_alctrReservedSpace);
}
static uint8_t* allocReservedSpaceForAllocator(uint32_t tilesPerDim, uint32_t layers)
{
const size_t tiles = tilesPerDim*tilesPerDim*layers;
void* mem = _NBL_ALIGNED_MALLOC(phys_pg_addr_alctr_t::reserved_size(1u, tiles, 1u), _NBL_SIMD_ALIGNMENT);
return reinterpret_cast<uint8_t*>(mem);
}
public:
struct SCreationParams
{
E_FORMAT_CLASS formatClass;
const E_FORMAT* formats;
uint32_t formatCount;
uint32_t tilesPerDim_log2;
uint32_t layerCount;
};
//_format implies format class and also is the format image is created with
IVTResidentStorage(E_FORMAT _imgFormat, uint32_t _layers, uint32_t _tilesPerDim) :
imageFormat(_imgFormat),
image(nullptr),//initialized in derived class's constructor
m_alctrReservedSpace(allocReservedSpaceForAllocator(_tilesPerDim, _layers)),
tileAlctr(m_alctrReservedSpace, 0u, 0u, 1u, _layers*_tilesPerDim*_tilesPerDim, 1u),
m_decodeAddr_layerShift(hlsl::findLSB(_tilesPerDim)<<1),
m_decodeAddr_xMask((1u<<(m_decodeAddr_layerShift>>1))-1u)
{
assert(_tilesPerDim<=MAX_TILES_PER_DIM);
assert(_layers<=MAX_LAYERS);
}
IVTResidentStorage(E_FORMAT _imgFormat, uint32_t _tilesPerDim) :
imageFormat(_imgFormat),
image(nullptr),//deferred initialization, when layer count is known
m_alctrReservedSpace(nullptr),
tileAlctr(), // default constructor, deferred initialization, when layer count is known
m_decodeAddr_layerShift(hlsl::findLSB(_tilesPerDim)<<1),
m_decodeAddr_xMask((1u<<(m_decodeAddr_layerShift>>1))-1u)
{
assert(_tilesPerDim<=MAX_TILES_PER_DIM);
}
IVTResidentStorage(core::smart_refctd_ptr<image_t>&& _image, const phys_pg_addr_alctr_t& _alctr, const void* _reservedSpc, uint32_t _layerShift, uint32_t _xmask) :
imageFormat(_image->getCreationParameters().format),
image(std::move(_image)),
m_alctrReservedSpace(reinterpret_cast<uint8_t*>(_NBL_ALIGNED_MALLOC(phys_pg_addr_alctr_t::reserved_size(_alctr, _alctr.get_total_size()),_NBL_SIMD_ALIGNMENT))),
tileAlctr(_alctr.get_total_size(), _alctr, m_alctrReservedSpace),
m_decodeAddr_layerShift(_layerShift),
m_decodeAddr_xMask(_xmask)
{
}
// TODO: refactor into the `_impl` pattern, and always add the MUTABLE FORMAT creation flag
virtual void deferredInitialization(uint32_t tileExtent, uint32_t _layers = 0u/*, TODO: const IImage::E_USAGE_FLAGS usages=IImage::EUF_SAMPLED_BIT, const bool extendedUsage=false*/)
{
assert(_layers != 0u); // Why the F have the default be 0 then!?
const bool uninitialized = (tileAlctr.get_align_offset() == phys_pg_addr_alctr_t::invalid_address);
if (uninitialized)
{
const uint32_t tilesPerDim = getTilesPerDim();
m_alctrReservedSpace = allocReservedSpaceForAllocator(tilesPerDim, _layers);
phys_pg_addr_alctr_t alctr(m_alctrReservedSpace, 0u, 0u, 1u, _layers*tilesPerDim*tilesPerDim, 1u);
tileAlctr = std::move(alctr);
}
}
uint32_t getTilesPerDim() const
{
uint32_t tiles = m_decodeAddr_layerShift >> 1;
return 1u << tiles;
}
uint16_t encodePageAddress(uint16_t _addr) const
{
const uint16_t x = _addr & m_decodeAddr_xMask;
const uint16_t y = (_addr>>(m_decodeAddr_layerShift>>1)) & m_decodeAddr_xMask;
const uint16_t layer = _addr >> m_decodeAddr_layerShift;
return x | (y<<SPhysPgOffset::PAGE_ADDR_X_BITS) | (layer<<SPhysPgOffset::PAGE_ADDR_LAYER_SHIFT);
}
// last parameter default means to inherit all usages for a view from the main image
core::smart_refctd_ptr<image_view_t> createView(E_FORMAT _format, const IImage::E_USAGE_FLAGS usages=IImage::EUF_NONE) const
{
auto found = m_viewsCache.find(_format);
if (found!=m_viewsCache.end())
return found->second;
typename image_view_t::SCreationParams params = {};
params.flags = static_cast<typename IImageView<image_t>::E_CREATE_FLAGS>(0);
params.subUsages = usages;
params.format = _format;
params.subresourceRange.aspectMask = static_cast<IImage::E_ASPECT_FLAGS>(0);
params.subresourceRange.baseArrayLayer = 0u;
params.subresourceRange.layerCount = image->getCreationParameters().arrayLayers;
params.subresourceRange.baseMipLevel = 0u;
params.subresourceRange.levelCount = image->getCreationParameters().mipLevels;
params.image = core::smart_refctd_ptr<image_t>(image);
params.viewType = asset::IImageView<image_t>::ET_2D_ARRAY;
return m_viewsCache.insert({_format,createView_internal(std::move(params))}).first->second;
}
//! @returns texel-wise offset of physical page
static core::vector3du32_SIMD pageCoords(SPhysPgOffset _txoffset, uint32_t _pageSz, uint32_t _padding)
{
core::vector3du32_SIMD coords(_txoffset.x(), _txoffset.y(), 0u);
coords *= (_pageSz + 2u*_padding);
coords += _padding;
coords.z = _txoffset.layer();
return coords;
}
void incrTileCounter(uint32_t tiles)
{
m_tileCounter += tiles;
}
void decrTileCounter(uint32_t tiles)
{
m_tileCounter -= tiles;
}
E_FORMAT imageFormat;
core::smart_refctd_ptr<image_t> image;
uint8_t* m_alctrReservedSpace = nullptr;
phys_pg_addr_alctr_t tileAlctr;
const uint32_t m_decodeAddr_layerShift;
const uint32_t m_decodeAddr_xMask;
uint32_t m_tileCounter = 0u;
protected:
virtual core::smart_refctd_ptr<image_view_t> createView_internal(typename image_view_t::SCreationParams&& _params) const = 0;
private:
mutable core::unordered_map<E_FORMAT, core::smart_refctd_ptr<image_view_t>> m_viewsCache;
};
//since c++14 std::hash specialization for all enum types are given by standard
core::unordered_map<E_FORMAT_CLASS, core::smart_refctd_ptr<IVTResidentStorage>> m_storage;
core::unordered_multimap<E_FORMAT, uint32_t> m_viewFormatToLayer;
typename SMiptailPacker::rect m_miptailOffsets[MAX_PHYSICAL_PAGE_SIZE_LOG2];
auto getPageTableLayersForFormat(E_FORMAT _format) const
{
return m_viewFormatToLayer.equal_range(_format);
}
void addPageTableLayerForFormat(E_FORMAT _format, uint32_t _layer)
{
m_viewFormatToLayer.insert({_format,_layer});
}
void removePageTableLayerForFormat(E_FORMAT _format, uint32_t _layer)
{
auto rng = getPageTableLayersForFormat(_format);
for (auto it = rng.first; it!=rng.second; ++it)
if (it->second==_layer)
{
m_viewFormatToLayer.erase(it);
return;
}
}
virtual core::smart_refctd_ptr<image_t> createPageTableImage(typename image_t::SCreationParams&& _params) const = 0;
virtual core::smart_refctd_ptr<IVTResidentStorage> createVTResidentStorage(E_FORMAT _format, uint32_t _tileExtent, uint32_t _layers, uint32_t _tilesPerDim) = 0;
virtual core::smart_refctd_ptr<IVTResidentStorage> createVTResidentStorage(E_FORMAT _format, uint32_t _tilesPerDim) = 0;
virtual ~IVirtualTexture()
{
if (m_pgTabAddrAlctr_reservedSpc)
_NBL_ALIGNED_FREE(m_pgTabAddrAlctr_reservedSpc);
}
uint32_t getTilesPerDimForFormatClass(E_FORMAT_CLASS _fc) const
{
const uint32_t tpd_log2 = m_physicalStorageExtentLog2CB(_fc);
return 1u << tpd_log2;
}
IVTResidentStorage* getStorageForFormatClass(E_FORMAT_CLASS _fc) const
{
auto found = m_storage.find(_fc);
if (found == m_storage.end())
return nullptr;
return found->second.get();
}
IVTResidentStorage* getOrCreateStorageForFormat(E_FORMAT _fmt)
{
const E_FORMAT_CLASS fc = getFormatClass(_fmt);
if (IVTResidentStorage* storage = getStorageForFormatClass(fc))
return storage;
const uint32_t tilesPerDim = getTilesPerDimForFormatClass(fc);
auto storage = createVTResidentStorage(_fmt, tilesPerDim);
m_storage[fc] = storage;
return storage.get();
}
// Delegated to separate method, because is strongly dependent on derived class and has to be called once derived class's object exist
void initResidentStorage(
const typename IVTResidentStorage::SCreationParams* _residentStorageParams,
uint32_t _residentStorageCount
)
{
{
const uint32_t tileExtent = getTileExtent();
for (uint32_t i = 0u; i < _residentStorageCount; ++i)
{
const auto& params = _residentStorageParams[i];
const uint32_t tilesPerDim = (1u<<params.tilesPerDim_log2);
assert(params.formatCount>0u);
const E_FORMAT fmt = params.formats[0];
const uint32_t layers = params.layerCount;
m_storage.insert({params.formatClass, createVTResidentStorage(fmt, tileExtent, layers, tilesPerDim)});
}
}
{
auto execPerFormat = [_residentStorageCount, _residentStorageParams,this] (auto f_fmtf, auto f_fmti, auto f_fmtu)
{
for (uint32_t i = 0u; i < _residentStorageCount; ++i)
{
const auto& params = _residentStorageParams[i];
for (uint32_t j = 0u; j < params.formatCount; ++j)
{
const E_FORMAT fmt = params.formats[j];
auto* storage = m_storage[params.formatClass].get();
if (isNormalizedFormat(fmt)||isFloatingPointFormat(fmt)||isScaledFormat(fmt))
f_fmtf(fmt,storage);
else { //integer formats
if (isSignedFormat(fmt))
f_fmti(fmt,storage);
else
f_fmtu(fmt,storage);
}
}
}
};
{
uint32_t fcount = 0u, icount = 0u, ucount = 0u;
execPerFormat([&](auto,auto) {++fcount; }, [&](auto,auto) {++icount; }, [&](auto,auto) {++ucount; });
m_fsamplers.views.reserve(fcount);
m_isamplers.views.reserve(icount);
m_usamplers.views.reserve(ucount);
}
{
execPerFormat(
[this](E_FORMAT _fmt, IVTResidentStorage* _storage) { m_fsamplers.views.push_back({ _fmt, _storage->createView(_fmt) }); },
[this](E_FORMAT _fmt, IVTResidentStorage* _storage) { m_isamplers.views.push_back({ _fmt, _storage->createView(_fmt) }); },
[this](E_FORMAT _fmt, IVTResidentStorage* _storage) { m_usamplers.views.push_back({ _fmt, _storage->createView(_fmt) }); }
);
}
}
}
auto createPageTableViewCreationParams() const
{
typename image_view_t::SCreationParams params;
params.flags = static_cast<typename image_view_t::E_CREATE_FLAGS>(0);
params.format = m_pageTable->getCreationParameters().format;
params.subresourceRange.aspectMask = static_cast<IImage::E_ASPECT_FLAGS>(0);
params.subresourceRange.baseArrayLayer = 0u;
params.subresourceRange.layerCount = m_pageTable->getCreationParameters().arrayLayers;
params.subresourceRange.baseMipLevel = 0u;
params.subresourceRange.levelCount = m_pageTable->getCreationParameters().mipLevels;
params.viewType = image_view_t::ET_2D_ARRAY;
params.image = m_pageTable;
return params;
}
virtual core::smart_refctd_ptr<image_view_t> createPageTableView() const = 0;
bool validateCommit(const SMasterTextureData& _addr, const IImage::SSubresourceRange& _subres, ISampler::E_TEXTURE_CLAMP _uwrap, ISampler::E_TEXTURE_CLAMP _vwrap)
{
if (_subres.layerCount != 1u)
return false;
if (SMasterTextureData::ETC_to_EWM(_uwrap)!=static_cast<typename SMasterTextureData::E_WRAP_MODE>(_addr.wrap_x))
return false;
if (SMasterTextureData::ETC_to_EWM(_vwrap)!=static_cast<typename SMasterTextureData::E_WRAP_MODE>(_addr.wrap_y))
return false;
return true;
}
bool validateAliasCreation(const SMasterTextureData& _addr, E_FORMAT _viewingFormat, const IImage::SSubresourceRange& _subresRelativeToMaster)
{
if (_subresRelativeToMaster.baseMipLevel+_subresRelativeToMaster.levelCount > _addr.maxMip)
return false;
return true;
}
void initPageTableAllocators(uint32_t szxy_log2, uint32_t _layers)
{
uint32_t pgtabSzSqr = (1u << szxy_log2);
pgtabSzSqr *= pgtabSzSqr;
const size_t spacePerAllocator = pg_tab_addr_alctr_t::reserved_size(pgtabSzSqr, pgtabSzSqr, 1u);
m_pgTabAddrAlctr_reservedSpc = reinterpret_cast<uint8_t*>(_NBL_ALIGNED_MALLOC(spacePerAllocator * _layers, _NBL_SIMD_ALIGNMENT));
for (uint32_t i = 0u; i < _layers; ++i)
{
auto& alctr = m_pageTableLayerAllocators[i];
alctr = pg_tab_addr_alctr_t(m_pgTabAddrAlctr_reservedSpc + i*spacePerAllocator, 0u, 0u, pgtabSzSqr, pgtabSzSqr, 1u);
}
}
public:
IVirtualTexture(
physical_tiles_per_dim_log2_callback_t&& _callback,
uint32_t _pgTabSzxy_log2 = 7u,
uint32_t _pgTabLayers = 32u,
uint32_t _pgSzxy_log2 = 7u,
uint32_t _tilePadding = 9u,
bool _initSharedResources = true
) : m_physicalStorageExtentLog2CB(std::move(_callback)),
m_pgSzxy(1u<<_pgSzxy_log2), m_pgSzxy_log2(_pgSzxy_log2), m_pgtabSzxy_log2(_pgTabSzxy_log2), m_tilePadding(_tilePadding)
{
{
m_precomputed.pgtab_sz_log2 = _pgTabSzxy_log2;
double f = 1.0;
f /= static_cast<double>(1u<<(m_pgSzxy_log2+m_pgtabSzxy_log2));
m_precomputed.vtex_sz_rcp = f;
}
std::fill(m_precomputed.layer_to_sampler_ix, m_precomputed.layer_to_sampler_ix+MAX_PAGE_TABLE_LAYERS, INVALID_SAMPLER_INDEX);
std::fill(m_precomputed.layer_to_phys_pg_tex_sz_rcp, m_precomputed.layer_to_phys_pg_tex_sz_rcp+MAX_PAGE_TABLE_LAYERS, core::nan<float>());
std::fill(m_layerToFormat.begin(), m_layerToFormat.end(), EF_UNKNOWN);
if (_initSharedResources)
{
initPageTableAllocators(_pgTabSzxy_log2, _pgTabLayers);
}
{
const uint32_t pgSzLog2 = getPageExtent_log2();
bool ok = SMiptailPacker::computeMiptailOffsets(m_miptailOffsets, pgSzLog2, m_tilePadding);
assert(ok);
}
m_addrsArray = core::make_refctd_dynamic_array<decltype(m_addrsArray)>(1u<<(2u*_pgTabSzxy_log2 + 1u));
std::fill(m_addrsArray->begin(), m_addrsArray->end(), IVTResidentStorage::phys_pg_addr_alctr_t::invalid_address);
m_sizesArray = core::make_refctd_dynamic_array<decltype(m_sizesArray)>(1u<<(2u*_pgTabSzxy_log2 + 1u));
std::fill(m_sizesArray->begin(), m_sizesArray->end(), 1u);
}
physical_tiles_per_dim_log2_callback_t getPhysicalStorageExtentCallback() const
{
return m_physicalStorageExtentLog2CB;
}
void shrink()
{
if (!m_pageTable)
{
uint32_t pgtLayers = 0u;
for (uint32_t i = 0u; i < MAX_PAGE_TABLE_LAYERS; ++i)
{
uint32_t layer = MAX_PAGE_TABLE_LAYERS - 1u - i;
if (m_precomputed.layer_to_sampler_ix[layer] != INVALID_SAMPLER_INDEX)
{
pgtLayers = layer + 1u;
break;
}
}
const uint32_t maxAllocatableTexSz_log2 = m_pgtabSzxy_log2 + m_pgSzxy_log2;
m_pageTable = createPageTable(m_pgtabSzxy_log2, pgtLayers, m_pgSzxy_log2, maxAllocatableTexSz_log2);
}
const uint32_t tileExtent = getTileExtent();
for (auto storage_it : m_storage)
{
auto& storage = storage_it.second;
storage->deferredInitialization(tileExtent);
}
auto initSampler = [this](typename SamplerArray::Sampler& s)
{
const E_FORMAT format = s.format;
const E_FORMAT_CLASS fc = getFormatClass(format);
auto found = m_storage.find(fc);
assert(found != m_storage.end());
IVTResidentStorage* storage = found->second.get();
s.view = storage->createView(format);
};
for (typename SamplerArray::Sampler& s : m_fsamplers.views)
{
if (s.view)
continue;
initSampler(s);
}
}
SMasterTextureData alloc(E_FORMAT _primaryFormat, const VkExtent3D& _mip0extent, const IImage::SSubresourceRange& _subres, ISampler::E_TEXTURE_CLAMP _wrapu, ISampler::E_TEXTURE_CLAMP _wrapv)
{
if (_subres.layerCount != 1u)
return SMasterTextureData::invalid();
const VkExtent3D extent = {_mip0extent.width>>_subres.baseMipLevel, _mip0extent.height>>_subres.baseMipLevel, 1u};
if (!isAllocatable(extent))
return SMasterTextureData::invalid();
const E_FORMAT format = _primaryFormat;
uint32_t smplrIndex = 0u;
IVTResidentStorage* const storage = getOrCreateStorageForFormat(format);
{
if (!storage)
return SMasterTextureData::invalid();
SamplerArray* views = nullptr;
if (isFloatingPointFormat(format)||isNormalizedFormat(format)||isScaledFormat(format))
views = &m_fsamplers;
else if (isSignedFormat(format))
views = &m_isamplers;
else
views = &m_usamplers;
auto views_rng = views->getViews();
auto view_it = std::find_if(views_rng.begin(), views_rng.end(), [format](const typename SamplerArray::Sampler& s) {return s.format == format;});
if (view_it == views_rng.end()) //no physical page texture view/sampler for requested format
{
smplrIndex = views->views.size();
typename SamplerArray::Sampler sampler{ format, nullptr };
views->views.push_back(sampler);
}
else
{
smplrIndex = std::distance(views_rng.begin(), view_it);
}
}
auto assignedLayers = getPageTableLayersForFormat(format);
uint32_t szAndAlignment = computeSquareSz(extent.width, extent.height);
szAndAlignment *= szAndAlignment;
uint32_t pgtLayer = 0u;
uint32_t addr = pg_tab_addr_alctr_t::invalid_address;
for (auto it = assignedLayers.first; it != assignedLayers.second; ++it)
{
pgtLayer = it->second;
core::address_allocator_traits<pg_tab_addr_alctr_t>::multi_alloc_addr(m_pageTableLayerAllocators[pgtLayer], 1u, &addr, &szAndAlignment, &szAndAlignment, nullptr);
if (addr!=pg_tab_addr_alctr_t::invalid_address)
break;
}
if (addr==pg_tab_addr_alctr_t::invalid_address)
{
pgtLayer = findFreePageTableLayer();
if (pgtLayer==INVALID_LAYER_INDEX)
return SMasterTextureData::invalid();
core::address_allocator_traits<pg_tab_addr_alctr_t>::multi_alloc_addr(m_pageTableLayerAllocators[pgtLayer], 1u, &addr, &szAndAlignment, &szAndAlignment, nullptr);
assert(addr!=pg_tab_addr_alctr_t::invalid_address);
addPageTableLayerForFormat(format, pgtLayer);
updatePrecomputedData(pgtLayer, smplrIndex, getStorageRcpSize(storage), format);
}
const uint32_t neededPhysPages = countNeededPages(_mip0extent, _subres.baseMipLevel);
storage->incrTileCounter(neededPhysPages);
return offsetToTextureData(
page_tab_offset_t(hlsl::morton2d_decode_x(addr), hlsl::morton2d_decode_y(addr), pgtLayer),
extent,
_subres.levelCount,
_wrapu,
_wrapv
);
}
bool destroyAlias(const SViewAliasTextureData& _addr)
{
uint32_t sz = computeSquareSz(_addr.origsize_x, _addr.origsize_y);
sz *= sz;
const uint32_t addr = hlsl::morton2d_encode(_addr.pgTab_x, _addr.pgTab_y);
core::address_allocator_traits<pg_tab_addr_alctr_t>::multi_free_addr(m_pageTableLayerAllocators[_addr.pgTab_layer], 1u, &addr, &sz);
const E_FORMAT format = getFormatInLayer(_addr.pgTab_layer);
IVTResidentStorage* storage = getStorageForFormatClass(getFormatClass(format));
if (!storage)
return false;
//in case when pgtab layer has no allocations, free it for use by another format
if (m_pageTableLayerAllocators[_addr.pgTab_layer].get_allocated_size()==0u)
{
m_pageTableLayerAllocators[_addr.pgTab_layer].reset();//defragmentation
updatePrecomputedData(_addr.pgTab_layer, INVALID_SAMPLER_INDEX, core::nan<float>(), EF_UNKNOWN);
removePageTableLayerForFormat(format, _addr.pgTab_layer);
}
return true;
}
virtual bool free(const SMasterTextureData& _addr)
{
const E_FORMAT format = getFormatInLayer(_addr.pgTab_layer);
IVTResidentStorage* storage = getStorageForFormatClass(getFormatClass(format));
if (!storage)
return false;
VkExtent3D extent;
extent.width = _addr.origsize_x;
extent.height = _addr.origsize_y;
extent.depth = 1u;
const uint32_t physPages = countNeededPages(extent, 0u);
storage->decrTileCounter(physPages);
return destroyAlias(reinterpret_cast<const SViewAliasTextureData*>(&_addr)[0]);
}
virtual bool commit(const SMasterTextureData& _addr, const image_t* _img, const IImage::SSubresourceRange& _subres, ISampler::E_TEXTURE_CLAMP _uwrap, ISampler::E_TEXTURE_CLAMP _vwrap, ISampler::E_TEXTURE_BORDER_COLOR _borderColor) = 0;
virtual SViewAliasTextureData createAlias(const SMasterTextureData& _addr, E_FORMAT _viewingFormat, const IImage::SSubresourceRange& _subresRelativeToMaster) = 0;
//! @returns pointer to reserved space for allocators
uint8_t* copyVirtualSpaceAllocatorsState(uint32_t _count, pg_tab_addr_alctr_t* _dstArray)
{
_count = std::min<uint32_t>(_count, m_pageTable->getCreationParameters().arrayLayers);
const uint32_t bufSz = m_pageTableLayerAllocators[0].get_total_size();
const uint32_t resSpcPerAlctr = pg_tab_addr_alctr_t::reserved_size(m_pageTableLayerAllocators[0].get_total_size(), m_pageTableLayerAllocators[0]);
uint8_t* reservedSpc = reinterpret_cast<uint8_t*>( _NBL_ALIGNED_MALLOC(resSpcPerAlctr*_count, _NBL_SIMD_ALIGNMENT) );
for (uint32_t i = 0u; i < _count; ++i)
_dstArray[i] = pg_tab_addr_alctr_t(bufSz, m_pageTableLayerAllocators[i], reservedSpc + i*resSpcPerAlctr);
return reservedSpc;
}
const auto& getViewFormatToLayerMapping() const { return m_viewFormatToLayer; }
image_view_t* getPageTableView() const
{
if (!m_pageTableView)
m_pageTableView = createPageTableView();
return m_pageTableView.get();
}
image_t* getPageTable() const { return m_pageTable.get(); }
uint32_t getPageTableExtent_log2() const { return m_pgSzxy_log2; }