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openmw/components/bsa/ba2dx10file.cpp

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#include "ba2dx10file.hpp"
#include <cassert>
#include <filesystem>
#include <fstream>
#include <lz4frame.h>
#if defined(_MSC_VER)
// why is this necessary? These are included with /external:I
#pragma warning(push)
#pragma warning(disable : 4706)
#pragma warning(disable : 4702)
#include <boost/iostreams/copy.hpp>
#include <boost/iostreams/filter/zlib.hpp>
#include <boost/iostreams/filtering_stream.hpp>
#include <boost/iostreams/filtering_streambuf.hpp>
#pragma warning(pop)
#else
#include <boost/iostreams/copy.hpp>
#include <boost/iostreams/filter/zlib.hpp>
#include <boost/iostreams/filtering_stream.hpp>
#include <boost/iostreams/filtering_streambuf.hpp>
#endif
#include <boost/iostreams/device/array.hpp>
#include <components/bsa/ba2file.hpp>
#include <components/bsa/memorystream.hpp>
#include <components/esm/fourcc.hpp>
#include <components/files/constrainedfilestream.hpp>
#include <components/files/conversion.hpp>
#include <components/misc/strings/lower.hpp>
namespace Bsa
{
BA2DX10File::BA2DX10File() {}
BA2DX10File::~BA2DX10File() = default;
void BA2DX10File::loadFiles(uint32_t fileCount, std::istream& in)
{
mFiles.clear();
mFiles.reserve(fileCount);
for (uint32_t i = 0; i < fileCount; ++i)
{
uint32_t nameHash, extHash, dirHash;
in.read(reinterpret_cast<char*>(&nameHash), sizeof(uint32_t));
in.read(reinterpret_cast<char*>(&extHash), sizeof(uint32_t));
in.read(reinterpret_cast<char*>(&dirHash), sizeof(uint32_t));
FileRecord file;
uint8_t unknown;
in.read(reinterpret_cast<char*>(&unknown), sizeof(uint8_t));
uint8_t nbChunks;
in.read(reinterpret_cast<char*>(&nbChunks), sizeof(uint8_t));
file.texturesChunks.resize(nbChunks);
uint16_t chunkHeaderSize;
in.read(reinterpret_cast<char*>(&chunkHeaderSize), sizeof(uint16_t));
if (chunkHeaderSize != 24)
fail("Corrupted BSA");
in.read(reinterpret_cast<char*>(&file.height), sizeof(uint16_t));
in.read(reinterpret_cast<char*>(&file.width), sizeof(uint16_t));
in.read(reinterpret_cast<char*>(&file.numMips), sizeof(uint8_t));
in.read(reinterpret_cast<char*>(&file.DXGIFormat), sizeof(uint8_t));
in.read(reinterpret_cast<char*>(&file.cubeMaps), sizeof(uint16_t));
for (auto& texture : file.texturesChunks)
{
in.read(reinterpret_cast<char*>(&texture.offset), sizeof(int64_t));
in.read(reinterpret_cast<char*>(&texture.packedSize), sizeof(uint32_t));
in.read(reinterpret_cast<char*>(&texture.size), sizeof(uint32_t));
in.read(reinterpret_cast<char*>(&texture.startMip), sizeof(uint16_t));
in.read(reinterpret_cast<char*>(&texture.endMip), sizeof(uint16_t));
uint32_t baadfood;
in.read(reinterpret_cast<char*>(&baadfood), sizeof(uint32_t));
if (baadfood != 0xBAADF00D)
fail("Corrupted BSA");
}
mFolders[dirHash][{ nameHash, extHash }] = std::move(file);
FileStruct fileStruct{};
mFiles.push_back(fileStruct);
}
}
/// Read header information from the input source
void BA2DX10File::readHeader()
{
assert(!mIsLoaded);
std::ifstream input(mFilepath, std::ios_base::binary);
// Total archive size
std::streamoff fsize = 0;
if (input.seekg(0, std::ios_base::end))
{
fsize = input.tellg();
input.seekg(0);
}
if (fsize < 24) // header is 24 bytes
fail("File too small to be a valid BSA archive");
// Get essential header numbers
uint32_t type, fileCount;
uint64_t fileTableOffset;
{
uint32_t header[4];
input.read(reinterpret_cast<char*>(header), 16);
input.read(reinterpret_cast<char*>(&fileTableOffset), 8);
if (header[0] != ESM::fourCC("BTDX"))
fail("Unrecognized BA2 signature");
mVersion = header[1];
switch (static_cast<BA2Version>(mVersion))
{
case BA2Version::Fallout4:
case BA2Version::Fallout4NextGen_v7:
case BA2Version::Fallout4NextGen_v8:
break;
case BA2Version::StarfieldDDS:
uint64_t dummy;
input.read(reinterpret_cast<char*>(&dummy), 8);
uint32_t compressionMethod;
input.read(reinterpret_cast<char*>(&compressionMethod), 4);
if (compressionMethod == 3)
fail("Unsupported LZ4-compressed DDS BA2");
break;
default:
fail("Unrecognized DDS BA2 version");
}
type = header[2];
fileCount = header[3];
}
if (type == ESM::fourCC("DX10"))
loadFiles(fileCount, input);
else
fail("Unrecognized ba2 version type");
// Read the string table
input.seekg(fileTableOffset);
for (uint32_t i = 0; i < fileCount; ++i)
{
std::vector<char> fileName;
uint16_t fileNameSize;
input.read(reinterpret_cast<char*>(&fileNameSize), sizeof(uint16_t));
fileName.resize(fileNameSize);
input.read(fileName.data(), fileName.size());
fileName.push_back('\0');
mFileNames.push_back(fileName);
mFiles[i].setNameInfos(0, &mFileNames.back());
}
mIsLoaded = true;
}
std::optional<BA2DX10File::FileRecord> BA2DX10File::getFileRecord(const std::string& str) const
{
for (const auto c : str)
{
if (((static_cast<unsigned>(c) >> 7U) & 1U) != 0U)
{
fail("File record " + str + " contains unicode characters, refusing to load.");
}
}
#ifdef _WIN32
const auto& path = str;
#else
// Force-convert the path into something UNIX can handle first
// to make sure std::filesystem::path doesn't think the entire path is the filename on Linux
// and subsequently purge it to determine the file folder.
std::string path = str;
std::replace(path.begin(), path.end(), '\\', '/');
#endif
const auto p = std::filesystem::path{ path }; // Purposefully damage Unicode strings.
const auto fileName = Misc::StringUtils::lowerCase(p.stem().string());
const auto ext = Misc::StringUtils::lowerCase(p.extension().string()); // Purposefully damage Unicode strings.
const auto folder = Misc::StringUtils::lowerCase(p.parent_path().string());
uint32_t folderHash = generateHash(folder);
auto it = mFolders.find(folderHash);
if (it == mFolders.end())
return std::nullopt; // folder not found
uint32_t fileHash = generateHash(fileName);
uint32_t extHash = generateExtensionHash(ext);
auto iter = it->second.find({ fileHash, extHash });
if (iter == it->second.end())
return std::nullopt; // file not found
return iter->second;
}
#pragma pack(push)
#pragma pack(1)
struct DDSHeader
{
uint32_t size = 0;
uint32_t flags = 0;
uint32_t height = 0;
uint32_t width = 0;
uint32_t pitchOrLinearSize = 0;
uint32_t depth = 0;
uint32_t mipMapCount = 0;
uint32_t reserved1[11] = {};
struct
{
uint32_t size = 0;
uint32_t flags = 0;
uint32_t fourCC = 0;
uint32_t RGBBitCount = 0;
uint32_t RBitMask = 0;
uint32_t GBitMask = 0;
uint32_t BBitMask = 0;
uint32_t ABitMask = 0;
} ddspf;
uint32_t caps = 0;
uint32_t caps2 = 0;
uint32_t caps3 = 0;
uint32_t caps4 = 0;
uint32_t reserved2 = 0;
};
struct DDSHeaderDX10 : DDSHeader
{
int32_t dxgiFormat = 0;
uint32_t resourceDimension = 0;
uint32_t miscFlags = 0;
uint32_t arraySize = 0;
uint32_t miscFlags2 = 0;
};
#pragma pack(pop)
Files::IStreamPtr BA2DX10File::getFile(const FileStruct* file)
{
if (auto fileRec = getFileRecord(file->name()); fileRec)
return getFile(*fileRec);
fail("File not found: " + std::string(file->name()));
}
void BA2DX10File::addFile(const std::string& filename, std::istream& file)
{
assert(false); // not implemented yet
fail("Add file is not implemented for compressed BSA: " + filename);
}
Files::IStreamPtr BA2DX10File::getFile(const char* file)
{
if (auto fileRec = getFileRecord(file); fileRec)
return getFile(*fileRec);
fail("File not found: " + std::string(file));
}
constexpr const uint32_t DDSD_CAPS = 0x00000001;
constexpr const uint32_t DDSD_HEIGHT = 0x00000002;
constexpr const uint32_t DDSD_WIDTH = 0x00000004;
constexpr const uint32_t DDSD_PITCH = 0x00000008;
constexpr const uint32_t DDSD_PIXELFORMAT = 0x00001000;
constexpr const uint32_t DDSD_MIPMAPCOUNT = 0x00020000;
constexpr const uint32_t DDSD_LINEARSIZE = 0x00080000;
constexpr const uint32_t DDSCAPS_COMPLEX = 0x00000008;
constexpr const uint32_t DDSCAPS_TEXTURE = 0x00001000;
constexpr const uint32_t DDSCAPS_MIPMAP = 0x00400000;
constexpr const uint32_t DDSCAPS2_CUBEMAP = 0x00000200;
constexpr const uint32_t DDSCAPS2_POSITIVEX = 0x00000400;
constexpr const uint32_t DDSCAPS2_NEGATIVEX = 0x00000800;
constexpr const uint32_t DDSCAPS2_POSITIVEY = 0x00001000;
constexpr const uint32_t DDSCAPS2_NEGATIVEY = 0x00002000;
constexpr const uint32_t DDSCAPS2_POSITIVEZ = 0x00004000;
constexpr const uint32_t DDSCAPS2_NEGATIVEZ = 0x00008000;
constexpr const uint32_t DDPF_ALPHAPIXELS = 0x00000001;
constexpr const uint32_t DDPF_ALPHA = 0x00000002;
constexpr const uint32_t DDPF_FOURCC = 0x00000004;
constexpr const uint32_t DDPF_RGB = 0x00000040;
constexpr const uint32_t DDPF_LUMINANCE = 0x00020000;
constexpr const uint32_t DDS_DIMENSION_TEXTURE2D = 0x00000003;
constexpr const uint32_t DDS_RESOURCE_MISC_TEXTURECUBE = 0x00000004;
enum DXGI : uint8_t
{
DXGI_FORMAT_UNKNOWN = 0,
DXGI_FORMAT_R32G32B32A32_TYPELESS,
DXGI_FORMAT_R32G32B32A32_FLOAT,
DXGI_FORMAT_R32G32B32A32_UINT,
DXGI_FORMAT_R32G32B32A32_SINT,
DXGI_FORMAT_R32G32B32_TYPELESS,
DXGI_FORMAT_R32G32B32_FLOAT,
DXGI_FORMAT_R32G32B32_UINT,
DXGI_FORMAT_R32G32B32_SINT,
DXGI_FORMAT_R16G16B16A16_TYPELESS,
DXGI_FORMAT_R16G16B16A16_FLOAT,
DXGI_FORMAT_R16G16B16A16_UNORM,
DXGI_FORMAT_R16G16B16A16_UINT,
DXGI_FORMAT_R16G16B16A16_SNORM,
DXGI_FORMAT_R16G16B16A16_SINT,
DXGI_FORMAT_R32G32_TYPELESS,
DXGI_FORMAT_R32G32_FLOAT,
DXGI_FORMAT_R32G32_UINT,
DXGI_FORMAT_R32G32_SINT,
DXGI_FORMAT_R32G8X24_TYPELESS,
DXGI_FORMAT_D32_FLOAT_S8X24_UINT,
DXGI_FORMAT_R32_FLOAT_X8X24_TYPELESS,
DXGI_FORMAT_X32_TYPELESS_G8X24_UINT,
DXGI_FORMAT_R10G10B10A2_TYPELESS,
DXGI_FORMAT_R10G10B10A2_UNORM,
DXGI_FORMAT_R10G10B10A2_UINT,
DXGI_FORMAT_R11G11B10_FLOAT,
DXGI_FORMAT_R8G8B8A8_TYPELESS,
DXGI_FORMAT_R8G8B8A8_UNORM,
DXGI_FORMAT_R8G8B8A8_UNORM_SRGB,
DXGI_FORMAT_R8G8B8A8_UINT,
DXGI_FORMAT_R8G8B8A8_SNORM,
DXGI_FORMAT_R8G8B8A8_SINT,
DXGI_FORMAT_R16G16_TYPELESS,
DXGI_FORMAT_R16G16_FLOAT,
DXGI_FORMAT_R16G16_UNORM,
DXGI_FORMAT_R16G16_UINT,
DXGI_FORMAT_R16G16_SNORM,
DXGI_FORMAT_R16G16_SINT,
DXGI_FORMAT_R32_TYPELESS,
DXGI_FORMAT_D32_FLOAT,
DXGI_FORMAT_R32_FLOAT,
DXGI_FORMAT_R32_UINT,
DXGI_FORMAT_R32_SINT,
DXGI_FORMAT_R24G8_TYPELESS,
DXGI_FORMAT_D24_UNORM_S8_UINT,
DXGI_FORMAT_R24_UNORM_X8_TYPELESS,
DXGI_FORMAT_X24_TYPELESS_G8_UINT,
DXGI_FORMAT_R8G8_TYPELESS,
DXGI_FORMAT_R8G8_UNORM,
DXGI_FORMAT_R8G8_UINT,
DXGI_FORMAT_R8G8_SNORM,
DXGI_FORMAT_R8G8_SINT,
DXGI_FORMAT_R16_TYPELESS,
DXGI_FORMAT_R16_FLOAT,
DXGI_FORMAT_D16_UNORM,
DXGI_FORMAT_R16_UNORM,
DXGI_FORMAT_R16_UINT,
DXGI_FORMAT_R16_SNORM,
DXGI_FORMAT_R16_SINT,
DXGI_FORMAT_R8_TYPELESS,
DXGI_FORMAT_R8_UNORM,
DXGI_FORMAT_R8_UINT,
DXGI_FORMAT_R8_SNORM,
DXGI_FORMAT_R8_SINT,
DXGI_FORMAT_A8_UNORM,
DXGI_FORMAT_R1_UNORM,
DXGI_FORMAT_R9G9B9E5_SHAREDEXP,
DXGI_FORMAT_R8G8_B8G8_UNORM,
DXGI_FORMAT_G8R8_G8B8_UNORM,
DXGI_FORMAT_BC1_TYPELESS,
DXGI_FORMAT_BC1_UNORM,
DXGI_FORMAT_BC1_UNORM_SRGB,
DXGI_FORMAT_BC2_TYPELESS,
DXGI_FORMAT_BC2_UNORM,
DXGI_FORMAT_BC2_UNORM_SRGB,
DXGI_FORMAT_BC3_TYPELESS,
DXGI_FORMAT_BC3_UNORM,
DXGI_FORMAT_BC3_UNORM_SRGB,
DXGI_FORMAT_BC4_TYPELESS,
DXGI_FORMAT_BC4_UNORM,
DXGI_FORMAT_BC4_SNORM,
DXGI_FORMAT_BC5_TYPELESS,
DXGI_FORMAT_BC5_UNORM,
DXGI_FORMAT_BC5_SNORM,
DXGI_FORMAT_B5G6R5_UNORM,
DXGI_FORMAT_B5G5R5A1_UNORM,
DXGI_FORMAT_B8G8R8A8_UNORM,
DXGI_FORMAT_B8G8R8X8_UNORM,
DXGI_FORMAT_R10G10B10_XR_BIAS_A2_UNORM,
DXGI_FORMAT_B8G8R8A8_TYPELESS,
DXGI_FORMAT_B8G8R8A8_UNORM_SRGB,
DXGI_FORMAT_B8G8R8X8_TYPELESS,
DXGI_FORMAT_B8G8R8X8_UNORM_SRGB,
DXGI_FORMAT_BC6H_TYPELESS,
DXGI_FORMAT_BC6H_UF16,
DXGI_FORMAT_BC6H_SF16,
DXGI_FORMAT_BC7_TYPELESS,
DXGI_FORMAT_BC7_UNORM,
DXGI_FORMAT_BC7_UNORM_SRGB,
DXGI_FORMAT_AYUV,
DXGI_FORMAT_Y410,
DXGI_FORMAT_Y416,
DXGI_FORMAT_NV12,
DXGI_FORMAT_P010,
DXGI_FORMAT_P016,
DXGI_FORMAT_420_OPAQUE,
DXGI_FORMAT_YUY2,
DXGI_FORMAT_Y210,
DXGI_FORMAT_Y216,
DXGI_FORMAT_NV11,
DXGI_FORMAT_AI44,
DXGI_FORMAT_IA44,
DXGI_FORMAT_P8,
DXGI_FORMAT_A8P8,
DXGI_FORMAT_B4G4R4A4_UNORM,
DXGI_FORMAT_P208,
DXGI_FORMAT_V208,
DXGI_FORMAT_V408
};
Files::IStreamPtr BA2DX10File::getFile(const FileRecord& fileRecord)
{
DDSHeaderDX10 header;
header.size = sizeof(DDSHeader);
header.width = fileRecord.width;
header.height = fileRecord.height;
header.flags = DDSD_CAPS | DDSD_PIXELFORMAT | DDSD_WIDTH | DDSD_HEIGHT | DDSD_MIPMAPCOUNT;
header.caps = DDSCAPS_TEXTURE;
header.mipMapCount = fileRecord.numMips;
if (header.mipMapCount > 1)
header.caps = header.caps | DDSCAPS_MIPMAP | DDSCAPS_COMPLEX;
header.depth = 0;
header.resourceDimension = DDS_DIMENSION_TEXTURE2D;
header.arraySize = 1;
if (fileRecord.cubeMaps == 2049)
{
header.caps = header.caps | DDSCAPS_COMPLEX;
header.caps2 = DDSCAPS2_CUBEMAP | DDSCAPS2_POSITIVEX | DDSCAPS2_NEGATIVEX | DDSCAPS2_POSITIVEY
| DDSCAPS2_NEGATIVEY | DDSCAPS2_POSITIVEZ | DDSCAPS2_NEGATIVEZ;
header.miscFlags = DDS_RESOURCE_MISC_TEXTURECUBE;
}
header.ddspf.size = sizeof(header.ddspf);
switch (DXGI(fileRecord.DXGIFormat))
{
case DXGI_FORMAT_BC1_UNORM:
{
header.flags = header.flags | DDSD_LINEARSIZE;
header.ddspf.flags = DDPF_FOURCC;
header.ddspf.fourCC = ESM::fourCC("DXT1");
header.pitchOrLinearSize = fileRecord.width * fileRecord.height / 2;
break;
}
case DXGI_FORMAT_BC2_UNORM:
{
header.flags = header.flags | DDSD_LINEARSIZE;
header.ddspf.flags = DDPF_FOURCC;
header.ddspf.fourCC = ESM::fourCC("DXT3");
header.pitchOrLinearSize = fileRecord.width * fileRecord.height;
break;
}
case DXGI_FORMAT_BC3_UNORM:
{
header.flags = header.flags | DDSD_LINEARSIZE;
header.ddspf.flags = DDPF_FOURCC;
header.ddspf.fourCC = ESM::fourCC("DXT5");
header.pitchOrLinearSize = fileRecord.width * fileRecord.height;
break;
}
case DXGI_FORMAT_BC4_SNORM:
{
header.flags = header.flags | DDSD_LINEARSIZE;
header.ddspf.flags = DDPF_FOURCC;
header.ddspf.fourCC = ESM::fourCC("BC4S");
header.pitchOrLinearSize = fileRecord.width * fileRecord.height / 2;
break;
}
case DXGI_FORMAT_BC4_UNORM:
{
header.flags = header.flags | DDSD_LINEARSIZE;
header.ddspf.flags = DDPF_FOURCC;
header.ddspf.fourCC = ESM::fourCC("BC4U");
header.pitchOrLinearSize = fileRecord.width * fileRecord.height / 2;
break;
}
case DXGI_FORMAT_BC5_SNORM:
{
header.flags = header.flags | DDSD_LINEARSIZE;
header.ddspf.flags = DDPF_FOURCC;
header.ddspf.fourCC = ESM::fourCC("BC5S");
header.pitchOrLinearSize = fileRecord.width * fileRecord.height;
break;
}
case DXGI_FORMAT_BC5_UNORM:
{
header.flags = header.flags | DDSD_LINEARSIZE;
header.ddspf.flags = DDPF_FOURCC;
header.ddspf.fourCC = ESM::fourCC("BC5U");
header.pitchOrLinearSize = fileRecord.width * fileRecord.height;
break;
}
case DXGI_FORMAT_BC1_UNORM_SRGB:
{
header.flags = header.flags | DDSD_LINEARSIZE;
header.ddspf.flags = DDPF_FOURCC;
header.ddspf.fourCC = ESM::fourCC("DX10");
header.dxgiFormat = int32_t(fileRecord.DXGIFormat);
header.pitchOrLinearSize = fileRecord.width * fileRecord.height / 2;
break;
}
case DXGI_FORMAT_BC2_UNORM_SRGB:
case DXGI_FORMAT_BC3_UNORM_SRGB:
case DXGI_FORMAT_BC6H_UF16:
case DXGI_FORMAT_BC6H_SF16:
case DXGI_FORMAT_BC7_UNORM:
case DXGI_FORMAT_BC7_UNORM_SRGB:
{
header.flags = header.flags | DDSD_LINEARSIZE;
header.ddspf.flags = DDPF_FOURCC;
header.ddspf.fourCC = ESM::fourCC("DX10");
header.dxgiFormat = int32_t(fileRecord.DXGIFormat);
header.pitchOrLinearSize = fileRecord.width * fileRecord.height;
break;
}
case DXGI_FORMAT_B8G8R8A8_UNORM_SRGB:
case DXGI_FORMAT_B8G8R8X8_UNORM_SRGB:
case DXGI_FORMAT_R8G8B8A8_SINT:
case DXGI_FORMAT_R8G8B8A8_UINT:
case DXGI_FORMAT_R8G8B8A8_UNORM_SRGB:
{
header.flags = header.flags | DDSD_PITCH;
header.ddspf.flags = DDPF_FOURCC;
header.ddspf.fourCC = ESM::fourCC("DX10");
header.dxgiFormat = int32_t(fileRecord.DXGIFormat);
header.pitchOrLinearSize = fileRecord.width * 4;
break;
}
case DXGI_FORMAT_R8G8_SINT:
case DXGI_FORMAT_R8G8_UINT:
{
header.flags = header.flags | DDSD_PITCH;
header.ddspf.flags = DDPF_FOURCC;
header.ddspf.fourCC = ESM::fourCC("DX10");
header.dxgiFormat = int32_t(fileRecord.DXGIFormat);
header.pitchOrLinearSize = fileRecord.width * 2;
break;
}
case DXGI_FORMAT_R8_SINT:
case DXGI_FORMAT_R8_SNORM:
case DXGI_FORMAT_R8_UINT:
{
header.flags = header.flags | DDSD_PITCH;
header.ddspf.flags = DDPF_FOURCC;
header.ddspf.fourCC = ESM::fourCC("DX10");
header.dxgiFormat = int32_t(fileRecord.DXGIFormat);
header.pitchOrLinearSize = fileRecord.width;
break;
}
case DXGI_FORMAT_R8G8B8A8_UNORM:
{
header.flags = header.flags | DDSD_PITCH;
header.ddspf.flags = DDPF_RGB | DDPF_ALPHAPIXELS;
header.ddspf.RGBBitCount = 32;
header.ddspf.RBitMask = 0x000000FF;
header.ddspf.GBitMask = 0x0000FF00;
header.ddspf.BBitMask = 0x00FF0000;
header.ddspf.ABitMask = 0xFF000000;
header.pitchOrLinearSize = fileRecord.width * 4;
break;
}
case DXGI_FORMAT_B8G8R8A8_UNORM:
{
header.flags = header.flags | DDSD_PITCH;
header.ddspf.flags = DDPF_RGB | DDPF_ALPHAPIXELS;
header.ddspf.RGBBitCount = 32;
header.ddspf.RBitMask = 0x00FF0000;
header.ddspf.GBitMask = 0x0000FF00;
header.ddspf.BBitMask = 0x000000FF;
header.ddspf.ABitMask = 0xFF000000;
header.pitchOrLinearSize = fileRecord.width * 4;
break;
}
case DXGI_FORMAT_B8G8R8X8_UNORM:
{
header.flags = header.flags | DDSD_PITCH;
header.ddspf.flags = DDPF_RGB;
header.ddspf.RGBBitCount = 32;
header.ddspf.RBitMask = 0x00FF0000;
header.ddspf.GBitMask = 0x0000FF00;
header.ddspf.BBitMask = 0x000000FF;
header.pitchOrLinearSize = fileRecord.width * 4;
break;
}
case DXGI_FORMAT_B5G6R5_UNORM:
{
header.flags = header.flags | DDSD_PITCH;
header.ddspf.flags = DDPF_RGB;
header.ddspf.RGBBitCount = 16;
header.ddspf.RBitMask = 0x0000F800;
header.ddspf.GBitMask = 0x000007E0;
header.ddspf.BBitMask = 0x0000001F;
header.pitchOrLinearSize = fileRecord.width * 2;
break;
}
case DXGI_FORMAT_B5G5R5A1_UNORM:
{
header.flags = header.flags | DDSD_PITCH;
header.ddspf.flags = DDPF_RGB | DDPF_ALPHAPIXELS;
header.ddspf.RGBBitCount = 16;
header.ddspf.RBitMask = 0x00007C00;
header.ddspf.GBitMask = 0x000003E0;
header.ddspf.BBitMask = 0x0000001F;
header.ddspf.ABitMask = 0x00008000;
header.pitchOrLinearSize = fileRecord.width * 2;
break;
}
case DXGI_FORMAT_R8G8_UNORM:
{
header.flags = header.flags | DDSD_PITCH;
header.ddspf.flags = DDPF_LUMINANCE | DDPF_ALPHAPIXELS;
header.ddspf.RGBBitCount = 16;
header.ddspf.RBitMask = 0x000000FF;
header.ddspf.ABitMask = 0x0000FF00;
header.pitchOrLinearSize = fileRecord.width * 2;
break;
}
case DXGI_FORMAT_A8_UNORM:
{
header.flags = header.flags | DDSD_PITCH;
header.ddspf.flags = DDPF_ALPHA;
header.ddspf.RGBBitCount = 8;
header.ddspf.ABitMask = 0x000000FF;
header.pitchOrLinearSize = fileRecord.width;
break;
}
case DXGI_FORMAT_R8_UNORM:
{
header.flags = header.flags | DDSD_PITCH;
header.ddspf.flags = DDPF_LUMINANCE;
header.ddspf.RGBBitCount = 8;
header.ddspf.RBitMask = 0x000000FF;
header.pitchOrLinearSize = fileRecord.width;
break;
}
default:
break;
}
size_t headerSize = (header.ddspf.fourCC == ESM::fourCC("DX10") ? sizeof(DDSHeaderDX10) : sizeof(DDSHeader));
size_t textureSize = sizeof(uint32_t) + headerSize; //"DDS " + header
for (const auto& textureChunk : fileRecord.texturesChunks)
textureSize += textureChunk.size;
auto memoryStreamPtr = std::make_unique<MemoryInputStream>(textureSize);
char* buff = memoryStreamPtr->getRawData();
uint32_t dds = ESM::fourCC("DDS ");
buff = (char*)std::memcpy(buff, &dds, sizeof(uint32_t)) + sizeof(uint32_t);
std::memcpy(buff, &header, headerSize);
size_t offset = sizeof(uint32_t) + headerSize;
// append chunks
for (const auto& c : fileRecord.texturesChunks)
{
if (c.packedSize != 0)
{
Files::IStreamPtr streamPtr = Files::openConstrainedFileStream(mFilepath, c.offset, c.packedSize);
std::istream* fileStream = streamPtr.get();
boost::iostreams::filtering_streambuf<boost::iostreams::input> inputStreamBuf;
inputStreamBuf.push(boost::iostreams::zlib_decompressor());
inputStreamBuf.push(*fileStream);
boost::iostreams::basic_array_sink<char> sr(memoryStreamPtr->getRawData() + offset, c.size);
boost::iostreams::copy(inputStreamBuf, sr);
}
// uncompressed chunk
else
{
Files::IStreamPtr streamPtr = Files::openConstrainedFileStream(mFilepath, c.offset, c.size);
std::istream* fileStream = streamPtr.get();
fileStream->read(memoryStreamPtr->getRawData() + offset, c.size);
}
offset += c.size;
}
return std::make_unique<Files::StreamWithBuffer<MemoryInputStream>>(std::move(memoryStreamPtr));
}
} // namespace Bsa
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