VTF.cpp

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#include <vtfpp/VTF.h>
 
#include <algorithm>
#include <cstring>
#include <unordered_map>
#include <utility>
 
#ifdef SOURCEPP_BUILD_WITH_TBB
#include <execution>
#endif
 
#ifdef SOURCEPP_BUILD_WITH_THREADS
#include <future>
#include <thread>
#endif
 
#include <BufferStream.h>
#include <miniz.h>
#include <zstd.h>
 
#include <sourcepp/compression/LZMA.h>
#include <vtfpp/ImageConversion.h>
 
using namespace sourcepp;
using namespace vtfpp;
 
namespace {
 
std::vector<std::byte> compressData(std::span<const std::byte> data, int16_t level, CompressionMethod method) {
    switch (method) {
        using enum CompressionMethod;
        case DEFLATE: {
            mz_ulong compressedSize = mz_compressBound(data.size());
            std::vector<std::byte> out(compressedSize);
 
            int status = MZ_OK;
            while ((status = mz_compress2(reinterpret_cast<unsigned char*>(out.data()), &compressedSize, reinterpret_cast<const unsigned char*>(data.data()), data.size(), level)) == MZ_BUF_ERROR) {
                compressedSize *= 2;
                out.resize(compressedSize);
            }
 
            if (status != MZ_OK) {
                return {};
            }
            out.resize(compressedSize);
            return out;
        }
        case ZSTD: {
            if (level < 0) {
                level = 6;
            }
 
            auto expectedSize = ZSTD_compressBound(data.size());
            std::vector<std::byte> out(expectedSize);
 
            auto compressedSize = ZSTD_compress(out.data(), expectedSize, data.data(), data.size(), level);
            if (ZSTD_isError(compressedSize)) {
                return {};
            }
 
            out.resize(compressedSize);
            return out;
        }
        case CONSOLE_LZMA: {
            const auto out = compression::compressValveLZMA(data, level);
            if (out) {
                return *out;
            }
            return {};
        }
    }
    return {};
}
 
void swapImageDataEndianForConsole(std::span<std::byte> imageData, ImageFormat format, uint16_t width, uint16_t height, VTF::Platform platform) {
    if (imageData.empty() || format == ImageFormat::EMPTY || platform == VTF::PLATFORM_PC) {
        return;
    }
 
    switch (format) {
        using enum ImageFormat;
        case BGRA8888:
        case BGRX8888:
        case UVWQ8888:
        case UVLX8888: {
            const auto newData = ImageConversion::convertImageDataToFormat(imageData, ImageFormat::ARGB8888, ImageFormat::BGRA8888, width, height);
            std::copy(newData.begin(), newData.end(), imageData.begin());
            break;
        }
        case DXT1:
        case DXT1_ONE_BIT_ALPHA:
        case DXT3:
        case DXT5:
        case UV88: {
            if (platform != VTF::PLATFORM_X360) {
                break;
            }
            std::span<uint16_t> dxtData{reinterpret_cast<uint16_t*>(imageData.data()), imageData.size() / sizeof(uint16_t)};
            std::for_each(
#ifdef SOURCEPP_BUILD_WITH_TBB
                    std::execution::par_unseq,
#endif
                    dxtData.begin(), dxtData.end(), [](uint16_t& value) {
                BufferStream::swap_endian(&value);
            });
            break;
        }
        default:
            // SOURCEPP_DEBUG_BREAK;
            break;
    }
}
 
} // namespace
 
const std::array<Resource::Type, 8>& Resource::getOrder() {
    static constinit std::array<Type, 8> typeArray{
        TYPE_THUMBNAIL_DATA,
        TYPE_IMAGE_DATA,
        TYPE_PARTICLE_SHEET_DATA,
        TYPE_CRC,
        TYPE_LOD_CONTROL_INFO,
        TYPE_EXTENDED_FLAGS,
        TYPE_KEYVALUES_DATA,
        TYPE_AUX_COMPRESSION,
    };
    static bool unsorted = true;
    if (unsorted) {
        std::sort(typeArray.begin(), typeArray.end());
        unsorted = false;
    }
    return typeArray;
}
 
Resource::ConvertedData Resource::convertData() const {
    switch (this->type) {
        case TYPE_PARTICLE_SHEET_DATA:
            if (this->data.size() <= sizeof(uint32_t)) {
                return {};
            }
            return SHT{{reinterpret_cast<const std::byte*>(this->data.data()) + sizeof(uint32_t), *reinterpret_cast<const uint32_t*>(this->data.data())}};
        case TYPE_CRC:
        case TYPE_EXTENDED_FLAGS:
            if (this->data.size() != sizeof(uint32_t)) {
                return {};
            }
            return *reinterpret_cast<const uint32_t*>(this->data.data());
        case TYPE_LOD_CONTROL_INFO:
            if (this->data.size() != sizeof(uint32_t)) {
                return {};
            }
            return std::make_tuple(
                    *(reinterpret_cast<const uint8_t*>(this->data.data()) + 0),
                    *(reinterpret_cast<const uint8_t*>(this->data.data()) + 1),
                    *(reinterpret_cast<const uint8_t*>(this->data.data()) + 2),
                    *(reinterpret_cast<const uint8_t*>(this->data.data()) + 3));
        case TYPE_KEYVALUES_DATA:
            if (this->data.size() <= sizeof(uint32_t)) {
                return "";
            }
            return std::string(reinterpret_cast<const char*>(this->data.data()) + sizeof(uint32_t), *reinterpret_cast<const uint32_t*>(this->data.data()));
        case TYPE_AUX_COMPRESSION:
            if (this->data.size() <= sizeof(uint32_t) || this->data.size() % sizeof(uint32_t) != 0) {
                return {};
            }
            return std::span{reinterpret_cast<uint32_t*>(this->data.data()), this->data.size() / 4};
        default:
            break;
    }
    return {};
}
 
VTF::VTF() {
    this->majorVersion = 7;
    this->minorVersion = 4;
 
    this->flags |= FLAG_NO_MIP | FLAG_NO_LOD;
 
    this->format = ImageFormat::EMPTY;
    this->thumbnailFormat = ImageFormat::EMPTY;
 
    this->width = 0;
    this->height = 0;
    this->mipCount = 0;
    this->frameCount = 0;
    this->sliceCount = 0;
 
    this->opened = true;
}
 
VTF::VTF(std::vector<std::byte>&& vtfData, bool parseHeaderOnly)
        : data(std::move(vtfData)) {
    BufferStreamReadOnly stream{this->data};
 
    if (auto signature = stream.read<uint32_t>(); signature == VTF_SIGNATURE) {
        this->platform = PLATFORM_PC;
        stream >> this->majorVersion >> this->minorVersion;
        if (this->majorVersion != 7 || this->minorVersion > 6) {
            return;
        }
    } else if (signature == VTFX_SIGNATURE || signature == VTF3_SIGNATURE) {
        stream.set_big_endian(true);
        uint32_t minorConsoleVersion = 0;
        stream >> this->platform >> minorConsoleVersion;
        if (minorConsoleVersion != 8) {
            return;
        }
        if (signature == VTF3_SIGNATURE) {
            this->platform = PLATFORM_PS3_PORTAL2;
        }
        this->majorVersion = 7;
        switch (this->platform) {
            case PLATFORM_PS3_ORANGEBOX:
            case PLATFORM_X360:
                this->minorVersion = 4;
                break;
            case PLATFORM_PS3_PORTAL2:
                this->minorVersion = 5;
                break;
            default:
                this->platform = PLATFORM_UNKNOWN;
                return;
        }
    } else {
        return;
    }
 
    const auto headerSize = stream.read<uint32_t>();
 
    const auto readResources = [this, &stream](uint32_t resourceCount) {
        // Read resource header info
        this->resources.reserve(resourceCount);
        for (int i = 0; i < resourceCount; i++) {
            auto& [type, flags_, data_] = this->resources.emplace_back();
 
            auto typeAndFlags = stream.read<uint32_t>();
            if (stream.is_big_endian()) {
                // This field is little-endian
                BufferStream::swap_endian(&typeAndFlags);
            }
            type = static_cast<Resource::Type>(typeAndFlags & 0xffffff); // last 3 bytes
            flags_ = static_cast<Resource::Flags>(typeAndFlags >> 24); // first byte
            data_ = stream.read_span<std::byte>(4);
 
            if (stream.is_big_endian() && !(flags_ & Resource::FLAG_LOCAL_DATA)) {
                BufferStream::swap_endian(reinterpret_cast<uint32_t*>(data_.data()));
            }
        }
 
        // Sort resources by their offset, in case certain VTFs are written
        // weirdly and have resource data written out of order. So far I have
        // found only one VTF in an official Valve game where this is the case
        std::sort(this->resources.begin(), this->resources.end(), [](const Resource& lhs, const Resource& rhs) {
            if ((lhs.flags & Resource::FLAG_LOCAL_DATA) && (rhs.flags & Resource::FLAG_LOCAL_DATA)) {
                return lhs.type < rhs.type;
            }
            if ((lhs.flags & Resource::FLAG_LOCAL_DATA) && !(rhs.flags & Resource::FLAG_LOCAL_DATA)) {
                return true;
            }
            if (!(lhs.flags & Resource::FLAG_LOCAL_DATA) && (rhs.flags & Resource::FLAG_LOCAL_DATA)) {
                return false;
            }
            return *reinterpret_cast<uint32_t*>(lhs.data.data()) < *reinterpret_cast<uint32_t*>(rhs.data.data());
        });
 
        // Fix up data spans to point to the actual data
        Resource* lastResource = nullptr;
        for (auto& resource : this->resources) {
            if (!(resource.flags & Resource::FLAG_LOCAL_DATA)) {
                if (lastResource) {
                    auto lastOffset = *reinterpret_cast<uint32_t*>(lastResource->data.data());
                    auto currentOffset = *reinterpret_cast<uint32_t*>(resource.data.data());
                    auto curPos = stream.tell();
                    stream.seek(lastOffset);
                    lastResource->data = stream.read_span<std::byte>(currentOffset - lastOffset);
                    stream.seek(static_cast<int64_t>(curPos));
                }
                lastResource = &resource;
            }
        }
        if (lastResource) {
            auto offset = *reinterpret_cast<uint32_t*>(lastResource->data.data());
            auto curPos = stream.tell();
            stream.seek(offset);
            lastResource->data = stream.read_span<std::byte>(stream.size() - offset);
            stream.seek(static_cast<int64_t>(curPos));
        }
    };
 
    if (this->platform != PLATFORM_PC) {
        uint8_t resourceCount;
        stream
            .read(this->flags)
            .read(this->width)
            .read(this->height)
            .read(this->sliceCount)
            .read(this->frameCount)
            .skip<uint16_t>() // preload
            .skip<uint8_t>() // skip high mip levels
            .read(resourceCount)
            .read(this->reflectivity[0])
            .read(this->reflectivity[1])
            .read(this->reflectivity[2])
            .read(this->bumpMapScale)
            .read(this->format)
            .skip<math::Vec4ui8>() // lowResImageSample (replacement for thumbnail resource, presumably linear color)
            .skip<uint32_t>(); // compressedLength
 
        if (this->platform == PLATFORM_PS3_PORTAL2) {
            stream.skip<uint32_t>();
        }
 
        this->mipCount = (this->flags & FLAG_NO_MIP) ? 1 : ImageDimensions::getActualMipCountForDimsOnConsole(this->width, this->height);
 
        if (parseHeaderOnly) {
            this->opened = true;
            return;
        }
 
        this->resources.reserve(resourceCount);
        readResources(resourceCount);
 
        this->opened = stream.tell() == headerSize;
 
        // The resources vector isn't modified by setResourceInternal when we're not adding a new one, so this is fine
        for (const auto& resource : this->resources) {
            // Decompress LZMA resources
            if (BufferStreamReadOnly rsrcStream{resource.data.data(), resource.data.size()}; rsrcStream.read<uint32_t>() == compression::VALVE_LZMA_SIGNATURE) {
                if (auto decompressedData = compression::decompressValveLZMA(resource.data)) {
                    this->setResourceInternal(resource.type, *decompressedData);
 
                    if (resource.type == Resource::TYPE_IMAGE_DATA) {
                        // Do this here because compressionLength in header can be garbage on PS3
                        this->compressionMethod = CompressionMethod::CONSOLE_LZMA;
                    }
                }
            }
 
            // Note: LOD, CRC, TSO may be incorrect - I can't find a sample of any in official console VTFs
            // If tweaking this switch, tweak the one in bake as well
            switch (resource.type) {
                default:
                case Resource::TYPE_UNKNOWN:
                case Resource::TYPE_CRC:
                case Resource::TYPE_LOD_CONTROL_INFO:
                case Resource::TYPE_AUX_COMPRESSION: // Strata-specific
                    break;
                case Resource::TYPE_THUMBNAIL_DATA:
                    ::swapImageDataEndianForConsole(resource.data, this->thumbnailFormat, this->thumbnailWidth, this->thumbnailHeight, this->platform);
                    break;
                case Resource::TYPE_IMAGE_DATA:
                    ::swapImageDataEndianForConsole(resource.data, this->format, this->width, this->height, this->platform);
                    break;
                case Resource::TYPE_PARTICLE_SHEET_DATA:
                case Resource::TYPE_EXTENDED_FLAGS:
                case Resource::TYPE_KEYVALUES_DATA:
                    if (resource.data.size() >= sizeof(uint32_t)) {
                        BufferStream::swap_endian(reinterpret_cast<uint32_t*>(resource.data.data()));
                    }
                    break;
            }
        }
        return;
    }
 
    stream
        .read(this->width)
        .read(this->height)
        .read(this->flags)
        .read(this->frameCount)
        .read(this->startFrame)
        .skip(4)
        .read(this->reflectivity[0])
        .read(this->reflectivity[1])
        .read(this->reflectivity[2])
        .skip(4)
        .read(this->bumpMapScale)
        .read(this->format)
        .read(this->mipCount);
 
    // This will always be DXT1
    stream.skip<ImageFormat>();
    stream >> this->thumbnailWidth >> this->thumbnailHeight;
    if (this->thumbnailWidth == 0 || this->thumbnailHeight == 0) {
        this->thumbnailFormat = ImageFormat::EMPTY;
    } else {
        this->thumbnailFormat = ImageFormat::DXT1;
    }
 
    if (this->minorVersion < 2) {
        this->sliceCount = 1;
    } else {
        stream.read(this->sliceCount);
    }
 
    if (parseHeaderOnly) {
        this->opened = true;
        return;
    }
 
    if (this->minorVersion >= 3) {
        stream.skip(3);
        auto resourceCount = stream.read<uint32_t>();
        stream.skip(8);
        readResources(resourceCount);
 
        this->opened = stream.tell() == headerSize;
 
        if (this->opened && this->minorVersion >= 6) {
            const auto* auxResource = this->getResource(Resource::TYPE_AUX_COMPRESSION);
            const auto* imageResource = this->getResource(Resource::TYPE_IMAGE_DATA);
            if (auxResource && imageResource) {
                if (auxResource->getDataAsAuxCompressionLevel() != 0) {
                    const auto faceCount = this->getFaceCount();
                    std::vector<std::byte> decompressedImageData(ImageFormatDetails::getDataLength(this->format, this->mipCount, this->frameCount, faceCount, this->width, this->height, this->sliceCount));
                    uint32_t oldOffset = 0;
                    for (int i = this->mipCount - 1; i >= 0; i--) {
                        for (int j = 0; j < this->frameCount; j++) {
                            for (int k = 0; k < faceCount; k++) {
                                uint32_t oldLength = auxResource->getDataAsAuxCompressionLength(i, this->mipCount, j, this->frameCount, k, faceCount);
                                if (uint32_t newOffset, newLength; ImageFormatDetails::getDataPosition(newOffset, newLength, this->format, i, this->mipCount, j, this->frameCount, k, faceCount, this->width, this->height, 0, this->getSliceCount())) {
                                    // Keep in mind that slices are compressed together
                                    mz_ulong decompressedImageDataSize = newLength * this->sliceCount;
                                    switch (auxResource->getDataAsAuxCompressionMethod()) {
                                        using enum CompressionMethod;
                                        case DEFLATE:
                                            if (mz_uncompress(reinterpret_cast<unsigned char*>(decompressedImageData.data() + newOffset), &decompressedImageDataSize, reinterpret_cast<const unsigned char*>(imageResource->data.data() + oldOffset), oldLength) != MZ_OK) {
                                                this->opened = false;
                                                return;
                                            }
                                            break;
                                        case ZSTD:
                                            if (auto decompressedSize = ZSTD_decompress(reinterpret_cast<unsigned char*>(decompressedImageData.data() + newOffset), decompressedImageDataSize, reinterpret_cast<const unsigned char*>(imageResource->data.data() + oldOffset), oldLength); ZSTD_isError(decompressedSize) || decompressedSize != decompressedImageDataSize) {
                                                this->opened = false;
                                                return;
                                            }
                                            break;
                                        case CONSOLE_LZMA:
                                            // Shouldn't be here!
                                            SOURCEPP_DEBUG_BREAK;
                                            break;
                                    }
                                }
                                oldOffset += oldLength;
                            }
                        }
                    }
                    this->setResourceInternal(Resource::TYPE_IMAGE_DATA, decompressedImageData);
                }
            }
        }
    } else {
        stream.skip(math::paddingForAlignment(16, stream.tell()));
        this->opened = stream.tell() == headerSize;
 
        this->resources.reserve(2);
 
        if (this->hasThumbnailData()) {
            this->resources.push_back({
                .type = Resource::TYPE_THUMBNAIL_DATA,
                .flags = Resource::FLAG_NONE,
                .data = stream.read_span<std::byte>(ImageFormatDetails::getDataLength(this->thumbnailFormat, this->thumbnailWidth, this->thumbnailHeight)),
            });
        }
        if (this->hasImageData()) {
            this->resources.push_back({
                .type = Resource::TYPE_IMAGE_DATA,
                .flags = Resource::FLAG_NONE,
                .data = stream.read_span<std::byte>(stream.size() - stream.tell()),
            });
        }
    }
 
    if (const auto* resource = this->getResource(Resource::TYPE_AUX_COMPRESSION)) {
        this->compressionLevel = resource->getDataAsAuxCompressionLevel();
        this->compressionMethod = resource->getDataAsAuxCompressionMethod();
        this->removeResourceInternal(Resource::TYPE_AUX_COMPRESSION);
    }
}
 
VTF::VTF(std::span<const std::byte> vtfData, bool parseHeaderOnly)
        : VTF(std::vector<std::byte>{vtfData.begin(), vtfData.end()}, parseHeaderOnly) {}
 
VTF::VTF(const std::string& vtfPath, bool parseHeaderOnly)
        : VTF(fs::readFileBuffer(vtfPath), parseHeaderOnly) {}
 
VTF::VTF(const VTF& other) {
    *this = other;
}
 
VTF& VTF::operator=(const VTF& other) {
    this->opened = other.opened;
    this->data = other.data;
    this->majorVersion = other.majorVersion;
    this->minorVersion = other.minorVersion;
    this->width = other.width;
    this->height = other.height;
    this->flags = other.flags;
    this->frameCount = other.frameCount;
    this->startFrame = other.startFrame;
    this->reflectivity = other.reflectivity;
    this->bumpMapScale = other.bumpMapScale;
    this->format = other.format;
    this->mipCount = other.mipCount;
    this->thumbnailFormat = other.thumbnailFormat;
    this->thumbnailWidth = other.thumbnailWidth;
    this->thumbnailHeight = other.thumbnailHeight;
    this->sliceCount = other.sliceCount;
 
    this->resources.clear();
    for (const auto& [otherType, otherFlags, otherData] : other.resources) {
        auto& [type, flags_, data_] = this->resources.emplace_back();
        type = otherType;
        flags_ = otherFlags;
        data_ = {this->data.data() + (otherData.data() - other.data.data()), otherData.size()};
    }
 
    this->platform = other.platform;
    this->compressionLevel = other.compressionLevel;
    this->compressionMethod = other.compressionMethod;
    this->imageWidthResizeMethod = other.imageWidthResizeMethod;
    this->imageHeightResizeMethod = other.imageHeightResizeMethod;
 
    return *this;
}
 
VTF::operator bool() const {
    return this->opened;
}
 
bool VTF::createInternal(VTF& writer, CreationOptions options) {
    bool out = true;
    if (writer.hasImageData() && (options.invertGreenChannel || options.gammaCorrection != 1.f)) {
        for (int i = 1; i < writer.mipCount; i++) {
            for (int j = 0; j < writer.frameCount; j++) {
                for (int k = 0; k < writer.getFaceCount(); k++) {
                    for (int l = 0; l < writer.sliceCount; l++) {
                        if (options.invertGreenChannel && !writer.setImage(ImageConversion::invertGreenChannelForImageData(writer.getImageDataRaw(i, j, k, l), writer.getFormat(), writer.getWidth(i), writer.getHeight(i)), writer.getFormat(), writer.getWidth(i), writer.getHeight(i), ImageConversion::ResizeFilter::DEFAULT, i, j, k, l)) {
                            out = false;
                        }
                        if (options.gammaCorrection != 1.f && !writer.setImage(ImageConversion::gammaCorrectImageData(writer.getImageDataRaw(i, j, k, l), writer.getFormat(), writer.getWidth(i), writer.getHeight(i), options.gammaCorrection), writer.getFormat(), writer.getWidth(i), writer.getHeight(i), ImageConversion::ResizeFilter::DEFAULT, i, j, k, l)) {
                            out = false;
                        }
                    }
                }
            }
        }
    }
    writer.setPlatform(options.platform);
    if (options.computeReflectivity) {
        writer.computeReflectivity();
    }
    if (options.initialFrameCount > 1 || options.isCubeMap || options.initialSliceCount > 1) {
        if (!writer.setFrameFaceAndSliceCount(options.initialFrameCount, options.isCubeMap, options.initialSliceCount)) {
            out = false;
        }
    }
    writer.setStartFrame(options.startFrame);
    writer.setBumpMapScale(options.bumpMapScale);
    if (options.computeThumbnail) {
        writer.computeThumbnail();
    }
    if (options.outputFormat == VTF::FORMAT_UNCHANGED) {
        options.outputFormat = writer.getFormat();
    } else if (options.outputFormat == VTF::FORMAT_DEFAULT) {
        options.outputFormat = VTF::getDefaultCompressedFormat(writer.getFormat(), writer.getMajorVersion(), writer.getMinorVersion(), options.isCubeMap);
    }
    if (options.computeTransparencyFlags) {
        writer.computeTransparencyFlags();
    }
    if (options.computeMips) {
        if (!writer.setMipCount(ImageDimensions::getRecommendedMipCountForDims(options.outputFormat, writer.getWidth(), writer.getHeight()))) {
            out = false;
        }
        writer.computeMips(options.filter);
    }
    writer.setFormat(options.outputFormat);
    writer.setCompressionLevel(options.compressionLevel);
    writer.setCompressionMethod(options.compressionMethod);
    return out;
}
 
bool VTF::create(std::span<const std::byte> imageData, ImageFormat format, uint16_t width, uint16_t height, const std::string& vtfPath, CreationOptions options) {
    VTF writer;
    writer.setVersion(options.majorVersion, options.minorVersion);
    writer.addFlags(options.flags);
    writer.setImageResizeMethods(options.widthResizeMethod, options.heightResizeMethod);
    if (!writer.setImage(imageData, format, width, height, options.filter)) {
        return false;
    }
    if (!createInternal(writer, options)) {
        return false;
    }
    return writer.bake(vtfPath);
}
 
bool VTF::create(ImageFormat format, uint16_t width, uint16_t height, const std::string& vtfPath, CreationOptions options) {
    std::vector<std::byte> imageData;
    imageData.resize(static_cast<uint32_t>(width) * height * ImageFormatDetails::bpp(format) / 8);
    return create(imageData, format, width, height, vtfPath, options);
}
 
VTF VTF::create(std::span<const std::byte> imageData, ImageFormat format, uint16_t width, uint16_t height, CreationOptions options) {
    VTF writer;
    writer.setVersion(options.majorVersion, options.minorVersion);
    writer.addFlags(options.flags);
    writer.setImageResizeMethods(options.widthResizeMethod, options.heightResizeMethod);
    writer.setImage(imageData, format, width, height, options.filter);
    createInternal(writer, options);
    return writer;
}
 
VTF VTF::create(ImageFormat format, uint16_t width, uint16_t height, CreationOptions options) {
    std::vector<std::byte> imageData;
    imageData.resize(static_cast<uint32_t>(width) * height * ImageFormatDetails::bpp(format) / 8);
    return create(imageData, format, width, height, options);
}
 
bool VTF::create(const std::string& imagePath, const std::string& vtfPath, CreationOptions options) {
    VTF writer;
    writer.setVersion(options.majorVersion, options.minorVersion);
    writer.addFlags(options.flags);
    writer.setImageResizeMethods(options.widthResizeMethod, options.heightResizeMethod);
    if (!writer.setImage(imagePath, options.filter)) {
        return false;
    }
    if (!createInternal(writer, options)) {
        return false;
    }
    return writer.bake(vtfPath);
}
 
VTF VTF::create(const std::string& imagePath, CreationOptions options) {
    VTF writer;
    writer.setVersion(options.majorVersion, options.minorVersion);
    writer.addFlags(options.flags);
    writer.setImageResizeMethods(options.widthResizeMethod, options.heightResizeMethod);
    writer.setImage(imagePath, options.filter);
    createInternal(writer, options);
    return writer;
}
 
VTF::Platform VTF::getPlatform() const {
    return this->platform;
}
 
void VTF::setPlatform(Platform newPlatform) {
    if (this->platform != PLATFORM_PC) {
        if (this->platform == PLATFORM_X360 || this->platform == PLATFORM_PS3_ORANGEBOX) {
            this->setVersion(7, 4);
        } else /*if (this->platform == PLATFORM_PS3_PORTAL2)*/ {
            this->setVersion(7, 5);
        }
 
        const auto recommendedCount = (this->flags & VTF::FLAG_NO_MIP) ? 1 : ImageDimensions::getActualMipCountForDimsOnConsole(this->width, this->height);
        if (this->mipCount != recommendedCount) {
            this->setMipCount(recommendedCount);
        }
    }
    this->platform = newPlatform;
    this->setCompressionMethod(this->compressionMethod);
}
 
uint32_t VTF::getMajorVersion() const {
    return this->majorVersion;
}
 
uint32_t VTF::getMinorVersion() const {
    return this->minorVersion;
}
 
void VTF::setVersion(uint32_t newMajorVersion, uint32_t newMinorVersion) {
    this->setMajorVersion(newMajorVersion);
    this->setMinorVersion(newMinorVersion);
}
 
void VTF::setMajorVersion(uint32_t newMajorVersion) {
    if (this->platform != PLATFORM_PC) {
        return;
    }
    this->majorVersion = newMajorVersion;
}
 
void VTF::setMinorVersion(uint32_t newMinorVersion) {
    if (this->platform != PLATFORM_PC) {
        return;
    }
    if (this->hasImageData()) {
        auto faceCount = this->getFaceCount();
        if (faceCount == 7 && (newMinorVersion < 1 || newMinorVersion > 4)) {
            faceCount = 6;
        }
        this->regenerateImageData(this->format, this->width, this->height, this->mipCount, this->frameCount, faceCount, this->sliceCount);
    }
    if (this->minorVersion <= 3 && newMinorVersion > 3) {
        this->flags &= static_cast<VTF::Flags>(~VTF::FLAG_MASK_AFTER_V7_3);
        if (this->flags & VTF::FLAG_PWL_CORRECTED) {
            this->flags &= ~VTF::FLAG_PWL_CORRECTED;
            this->flags |= VTF::FLAG_SRGB;
        }
    } else if (this->minorVersion > 3 && newMinorVersion <= 3) {
        if (this->flags & VTF::FLAG_SRGB) {
            this->flags |= VTF::FLAG_PWL_CORRECTED;
        }
        this->flags &= static_cast<VTF::Flags>(~VTF::FLAG_MASK_AFTER_V7_3);
    }
    this->minorVersion = newMinorVersion;
}
 
ImageConversion::ResizeMethod VTF::getImageWidthResizeMethod() const {
    return this->imageWidthResizeMethod;
}
 
ImageConversion::ResizeMethod VTF::getImageHeightResizeMethod() const {
    return this->imageHeightResizeMethod;
}
 
void VTF::setImageResizeMethods(ImageConversion::ResizeMethod imageWidthResizeMethod_, ImageConversion::ResizeMethod imageHeightResizeMethod_) {
    this->imageWidthResizeMethod = imageWidthResizeMethod_;
    this->imageHeightResizeMethod = imageHeightResizeMethod_;
}
 
void VTF::setImageWidthResizeMethod(ImageConversion::ResizeMethod imageWidthResizeMethod_) {
    this->imageWidthResizeMethod = imageWidthResizeMethod_;
}
 
void VTF::setImageHeightResizeMethod(ImageConversion::ResizeMethod imageHeightResizeMethod_) {
    this->imageHeightResizeMethod = imageHeightResizeMethod_;
}
 
uint16_t VTF::getWidth(uint8_t mip) const {
    return mip > 0 ? ImageDimensions::getMipDim(mip, this->width) : this->width;
}
 
uint16_t VTF::getHeight(uint8_t mip) const {
    return mip > 0 ? ImageDimensions::getMipDim(mip, this->height) : this->height;
}
 
void VTF::setSize(uint16_t newWidth, uint16_t newHeight, ImageConversion::ResizeFilter filter) {
    if (newWidth == 0 || newHeight == 0) {
        this->format = ImageFormat::EMPTY;
        this->width = 0;
        this->height = 0;
        this->removeResourceInternal(Resource::TYPE_IMAGE_DATA);
        return;
    }
 
    ImageConversion::setResizedDims(newWidth, this->imageWidthResizeMethod, newHeight, this->imageHeightResizeMethod);
    if (this->hasImageData()) {
        if (this->width == newWidth && this->height == newHeight) {
            return;
        }
        auto newMipCount = this->mipCount;
        if (this->platform == VTF::PLATFORM_PC) {
            if (const auto recommendedCount = ImageDimensions::getRecommendedMipCountForDims(this->format, newWidth, newHeight); newMipCount > recommendedCount) {
                newMipCount = recommendedCount;
            }
        } else {
            newMipCount = (this->flags & VTF::FLAG_NO_MIP) ? 1 : ImageDimensions::getActualMipCountForDimsOnConsole(newWidth, newHeight);
        }
        this->regenerateImageData(this->format, newWidth, newHeight, newMipCount, this->frameCount, this->getFaceCount(), this->sliceCount, filter);
    } else {
        this->format = ImageFormat::RGBA8888;
        this->mipCount = 1;
        this->frameCount = 1;
        this->flags &= ~FLAG_ENVMAP;
        this->width = newWidth;
        this->height = newHeight;
        this->sliceCount = 1;
        this->setResourceInternal(Resource::TYPE_IMAGE_DATA, std::vector<std::byte>(ImageFormatDetails::getDataLength(this->format, this->mipCount, this->frameCount, 1, this->width, this->height, this->sliceCount)));
    }
}
 
VTF::Flags VTF::getFlags() const {
    return this->flags;
}
 
void VTF::setFlags(Flags flags_) {
    this->flags = (this->flags & FLAG_MASK_INTERNAL) | (flags_ & ~FLAG_MASK_INTERNAL);
}
 
void VTF::addFlags(Flags flags_) {
    this->flags |= flags_ & ~FLAG_MASK_INTERNAL;
}
 
void VTF::removeFlags(Flags flags_) {
    this->flags &= ~flags_ | FLAG_MASK_INTERNAL;
}
 
void VTF::computeTransparencyFlags() {
    if (ImageFormatDetails::transparent(this->format)) {
        if (ImageFormatDetails::decompressedAlpha(this->format) > 1) {
            this->flags &= ~VTF::FLAG_ONE_BIT_ALPHA;
            this->flags |= VTF::FLAG_MULTI_BIT_ALPHA;
        } else {
            this->flags |= VTF::FLAG_ONE_BIT_ALPHA;
            this->flags &= ~VTF::FLAG_MULTI_BIT_ALPHA;
        }
    } else {
        this->flags &= ~VTF::FLAG_ONE_BIT_ALPHA;
        this->flags &= ~VTF::FLAG_MULTI_BIT_ALPHA;
    }
}
 
ImageFormat VTF::getDefaultCompressedFormat(ImageFormat inputFormat, uint32_t majorVersion, uint32_t minorVersion, bool isCubeMap) {
    if (inputFormat != ImageFormat::EMPTY) {
        if (majorVersion >= 7 && minorVersion >= 6 && isCubeMap) {
            return ImageFormat::BC6H;
        }
        if (ImageFormatDetails::decompressedAlpha(inputFormat) > 0) {
            if (majorVersion >= 7 && minorVersion >= 6) {
                return ImageFormat::BC7;
            }
            return ImageFormat::DXT5;
        }
    }
    return ImageFormat::DXT1;
}
 
ImageFormat VTF::getFormat() const {
    return this->format;
}
 
void VTF::setFormat(ImageFormat newFormat, ImageConversion::ResizeFilter filter) {
    if (newFormat == VTF::FORMAT_UNCHANGED || newFormat == this->format) {
        return;
    }
    if (newFormat == VTF::FORMAT_DEFAULT) {
        newFormat = VTF::getDefaultCompressedFormat(this->format, this->majorVersion, this->minorVersion, this->getFaceCount() > 1);
    }
    if (!this->hasImageData()) {
        this->format = newFormat;
        return;
    }
    auto newMipCount = this->mipCount;
    if (const auto recommendedCount = ImageDimensions::getRecommendedMipCountForDims(newFormat, this->width, this->height); newMipCount > recommendedCount) {
        newMipCount = recommendedCount;
    }
    if (ImageFormatDetails::compressed(newFormat)) {
        this->regenerateImageData(newFormat, this->width + math::paddingForAlignment(4, this->width), this->height + math::paddingForAlignment(4, this->height), newMipCount, this->frameCount, this->getFaceCount(), this->sliceCount, filter);
    } else {
        this->regenerateImageData(newFormat, this->width, this->height, newMipCount, this->frameCount, this->getFaceCount(), this->sliceCount, filter);
    }
}
 
uint8_t VTF::getMipCount() const {
    return this->mipCount;
}
 
bool VTF::setMipCount(uint8_t newMipCount) {
    if (!this->hasImageData()) {
        return false;
    }
    if (const auto recommended = ImageDimensions::getRecommendedMipCountForDims(this->format, this->width, this->height); newMipCount > recommended) {
        newMipCount = recommended;
        if (newMipCount == 1) {
            return false;
        }
    }
    if (newMipCount > 1) {
        this->flags &= ~(FLAG_NO_MIP | FLAG_NO_LOD);
    } else {
        this->flags |= FLAG_NO_MIP | FLAG_NO_LOD;
    }
    this->regenerateImageData(this->format, this->width, this->height, newMipCount, this->frameCount, this->getFaceCount(), this->sliceCount);
    return true;
}
 
bool VTF::setRecommendedMipCount() {
    if (this->platform == VTF::PLATFORM_PC) {
        return this->setMipCount(ImageDimensions::getRecommendedMipCountForDims(this->format, this->width, this->height));
    }
    return this->setMipCount(ImageDimensions::getActualMipCountForDimsOnConsole(this->width, this->height));
}
 
void VTF::computeMips(ImageConversion::ResizeFilter filter) {
    auto* imageResource = this->getResourceInternal(Resource::TYPE_IMAGE_DATA);
    if (!imageResource || !this->hasImageData()) {
        return;
    }
 
    if (this->mipCount <= 1) {
        if (!this->setRecommendedMipCount() || this->mipCount <= 1) {
            return;
        }
    }
 
    auto* outputDataPtr = imageResource->data.data();
    const auto faceCount = this->getFaceCount();
 
#ifdef SOURCEPP_BUILD_WITH_THREADS
    std::vector<std::future<void>> futures;
    futures.reserve((this->mipCount - 1) * this->frameCount * faceCount * this->sliceCount);
#endif
    for (int j = 0; j < this->frameCount; j++) {
        for (int k = 0; k < faceCount; k++) {
            for (int l = 0; l < this->sliceCount; l++) {
#ifdef SOURCEPP_BUILD_WITH_THREADS
                futures.push_back(std::async(std::launch::async, [this, filter, outputDataPtr, faceCount, j, k, l] {
#endif
                    for (int i = 1; i < this->mipCount; i++) {
                        auto mip = ImageConversion::resizeImageData(this->getImageDataRaw(i - 1, j, k, l), this->format, ImageDimensions::getMipDim(i - 1, this->width), ImageDimensions::getMipDim(i, this->width), ImageDimensions::getMipDim(i - 1, this->height), ImageDimensions::getMipDim(i, this->height), this->imageDataIsSRGB(), filter);
                        if (uint32_t offset, length; ImageFormatDetails::getDataPosition(offset, length, this->format, i, this->mipCount, j, this->frameCount, k, faceCount, this->width, this->height, l, this->sliceCount) && mip.size() == length) {
                            std::memcpy(outputDataPtr + offset, mip.data(), length);
                        }
                    }
#ifdef SOURCEPP_BUILD_WITH_THREADS
                }));
                if (std::thread::hardware_concurrency() > 0 && futures.size() >= std::thread::hardware_concurrency()) {
                    for (auto& future : futures) {
                        future.get();
                    }
                    futures.clear();
                }
#endif
            }
        }
    }
#ifdef SOURCEPP_BUILD_WITH_THREADS
    for (auto& future : futures) {
        future.get();
    }
#endif
}
 
uint16_t VTF::getFrameCount() const {
    return this->frameCount;
}
 
bool VTF::setFrameCount(uint16_t newFrameCount) {
    if (!this->hasImageData()) {
        return false;
    }
    this->regenerateImageData(this->format, this->width, this->height, this->mipCount, newFrameCount, this->getFaceCount(), this->sliceCount);
    return true;
}
 
uint8_t VTF::getFaceCount() const {
    if (!this->hasImageData()) {
        return 0;
    }
    const auto* image = this->getResource(Resource::TYPE_IMAGE_DATA);
    if (!image) {
        return 0;
    }
    if (!(this->flags & VTF::FLAG_ENVMAP)) {
        return 1;
    }
    if (this->minorVersion >= 6) {
        // All v7.6 VTFs are sane, and we need this special case to fix a bug in the parser where
        // it won't recognize cubemaps as cubemaps because the image resource is compressed!
        return 6;
    }
    const auto expectedLength = ImageFormatDetails::getDataLength(this->format, this->mipCount, this->frameCount, 6, this->width, this->height, this->sliceCount);
    if (this->majorVersion == 7 && this->minorVersion >= 1 && this->minorVersion <= 4 && expectedLength < image->data.size()) {
        return 7;
    }
    if (expectedLength == image->data.size()) {
        return 6;
    }
    return 1;
}
 
bool VTF::setFaceCount(bool isCubemap) {
    if (!this->hasImageData()) {
        return false;
    }
    this->regenerateImageData(this->format, this->width, this->height, this->mipCount, this->frameCount, isCubemap ? ((this->minorVersion >= 1 && this->minorVersion <= 4) ? 7 : 6) : 1, this->sliceCount);
    return true;
}
 
uint16_t VTF::getSliceCount() const {
    return this->sliceCount;
}
 
bool VTF::setSliceCount(uint16_t newSliceCount) {
    if (!this->hasImageData()) {
        return false;
    }
    this->regenerateImageData(this->format, this->width, this->height, this->mipCount, this->frameCount, this->getFaceCount(), newSliceCount);
    return true;
}
 
bool VTF::setFrameFaceAndSliceCount(uint16_t newFrameCount, bool isCubemap, uint16_t newSliceCount) {
    if (!this->hasImageData()) {
        return false;
    }
    this->regenerateImageData(this->format, this->width, this->height, this->mipCount, newFrameCount, isCubemap ? ((this->minorVersion >= 1 && this->minorVersion <= 4) ? 7 : 6) : 1, newSliceCount);
    return true;
}
 
uint16_t VTF::getStartFrame() const {
    return this->startFrame;
}
 
void VTF::setStartFrame(uint16_t newStartFrame) {
    this->startFrame = newStartFrame;
}
 
math::Vec3f VTF::getReflectivity() const {
    return this->reflectivity;
}
 
void VTF::setReflectivity(sourcepp::math::Vec3f newReflectivity) {
    this->reflectivity = newReflectivity;
}
 
void VTF::computeReflectivity() {
    static constexpr auto getReflectivityForImage = [](const VTF& vtf, uint16_t frame, uint8_t face, uint16_t slice) {
        static constexpr auto getReflectivityForPixel = [](const ImagePixel::RGBA8888* pixel) -> math::Vec3f {
            // http://markjstock.org/doc/gsd_talk_11_notes.pdf page 11
            math::Vec3f ref{static_cast<float>(pixel->r), static_cast<float>(pixel->g), static_cast<float>(pixel->b)};
            ref /= 255.f * 0.9f;
            ref[0] *= ref[0];
            ref[1] *= ref[1];
            ref[2] *= ref[2];
            return ref;
        };
 
        auto rgba8888Data = vtf.getImageDataAsRGBA8888(0, frame, face, slice);
        math::Vec3f out{};
        for (uint64_t i = 0; i < rgba8888Data.size(); i += 4) {
            out += getReflectivityForPixel(reinterpret_cast<ImagePixel::RGBA8888*>(rgba8888Data.data() + i));
        }
        return out / (rgba8888Data.size() / sizeof(ImagePixel::RGBA8888));
    };
 
    const auto faceCount = this->getFaceCount();
 
#ifdef SOURCEPP_BUILD_WITH_THREADS
    if (this->frameCount > 1 || faceCount > 1 || this->sliceCount > 1) {
        std::vector<std::future<math::Vec3f>> futures;
        futures.reserve(this->frameCount * faceCount * this->sliceCount);
 
        this->reflectivity = {};
        for (int j = 0; j < this->frameCount; j++) {
            for (int k = 0; k < faceCount; k++) {
                for (int l = 0; l < this->sliceCount; l++) {
                    futures.push_back(std::async(std::launch::async, [this, j, k, l] {
                        return getReflectivityForImage(*this, j, k, l);
                    }));
                    if (std::thread::hardware_concurrency() > 0 && futures.size() >= std::thread::hardware_concurrency()) {
                        for (auto& future : futures) {
                            this->reflectivity += future.get();
                        }
                        futures.clear();
                    }
                }
            }
        }
 
        for (auto& future : futures) {
            this->reflectivity += future.get();
        }
        this->reflectivity /= this->frameCount * faceCount * this->sliceCount;
    } else {
        this->reflectivity = getReflectivityForImage(*this, 0, 0, 0);
    }
#else
    this->reflectivity = {};
    for (int j = 0; j < this->frameCount; j++) {
        for (int k = 0; k < faceCount; k++) {
            for (int l = 0; l < this->sliceCount; l++) {
                this->reflectivity += getReflectivityForImage(*this, j, k, l);
            }
        }
    }
    this->reflectivity /= this->frameCount * faceCount * this->sliceCount;
#endif
}
 
float VTF::getBumpMapScale() const {
    return this->bumpMapScale;
}
 
void VTF::setBumpMapScale(float newBumpMapScale) {
    this->bumpMapScale = newBumpMapScale;
}
 
ImageFormat VTF::getThumbnailFormat() const {
    return this->thumbnailFormat;
}
 
uint8_t VTF::getThumbnailWidth() const {
    return this->thumbnailWidth;
}
 
uint8_t VTF::getThumbnailHeight() const {
    return this->thumbnailHeight;
}
 
const std::vector<Resource>& VTF::getResources() const {
    return this->resources;
}
 
const Resource* VTF::getResource(Resource::Type type) const {
    for (const auto& resource : this->resources) {
        if (resource.type == type) {
            return &resource;
        }
    }
    return nullptr;
}
 
Resource* VTF::getResourceInternal(Resource::Type type) {
    for (auto& resource : this->resources) {
        if (resource.type == type) {
            return &resource;
        }
    }
    return nullptr;
}
 
void VTF::setResourceInternal(Resource::Type type, std::span<const std::byte> data_) {
    if (const auto* resource = this->getResource(type); resource && resource->data.size() == data_.size()) {
        std::memcpy(resource->data.data(), data_.data(), data_.size());
        return;
    }
 
    // Store resource data
    std::unordered_map<Resource::Type, std::pair<std::vector<std::byte>, uint64_t>> resourceData;
    for (const auto& [type_, flags_, dataSpan] : this->resources) {
        resourceData[type_] = {std::vector<std::byte>{dataSpan.begin(), dataSpan.end()}, 0};
    }
 
    // Set new resource
    if (data_.empty()) {
        resourceData.erase(type);
    } else {
        resourceData[type] = {{data_.begin(), data_.end()}, 0};
    }
 
    // Save the data
    this->data.clear();
    BufferStream writer{this->data};
 
    for (auto resourceType : Resource::getOrder()) {
        if (!resourceData.contains(resourceType)) {
            continue;
        }
        auto& [specificResourceData, offset] = resourceData[resourceType];
        if (resourceType == type) {
            Resource newResource{
                type,
                specificResourceData.size() <= sizeof(uint32_t) ? Resource::FLAG_LOCAL_DATA : Resource::FLAG_NONE,
                {this->data.data() + offset, specificResourceData.size()},
            };
            if (auto* resourcePtr = this->getResourceInternal(type)) {
                *resourcePtr = newResource;
            } else {
                this->resources.push_back(newResource);
            }
        } else if (!resourceData.contains(resourceType)) {
            continue;
        }
        offset = writer.tell();
        writer.write(specificResourceData);
    }
    this->data.resize(writer.size());
 
    for (auto& [type_, flags_, dataSpan] : this->resources) {
        if (resourceData.contains(type_)) {
            const auto& [specificResourceData, offset] = resourceData[type_];
            dataSpan = {this->data.data() + offset, specificResourceData.size()};
        }
    }
}
 
void VTF::removeResourceInternal(Resource::Type type) {
    std::erase_if(this->resources, [type](const Resource& resource) { return resource.type == type; });
}
 
void VTF::regenerateImageData(ImageFormat newFormat, uint16_t newWidth, uint16_t newHeight, uint8_t newMipCount, uint16_t newFrameCount, uint8_t newFaceCount, uint16_t newSliceCount, ImageConversion::ResizeFilter filter) {
    if (!newWidth)      { newWidth      = 1; }
    if (!newHeight)     { newHeight     = 1; }
    if (!newMipCount)   { newMipCount   = 1; }
    if (!newFrameCount) { newFrameCount = 1; }
    if (!newFaceCount)  { newFaceCount  = 1; }
    if (!newSliceCount) { newSliceCount = 1; }
 
    const auto faceCount = this->getFaceCount();
    if (this->format == newFormat && this->width == newWidth && this->height == newHeight && this->mipCount == newMipCount && this->frameCount == newFrameCount && faceCount == newFaceCount && this->sliceCount == newSliceCount) {
        return;
    }
 
    std::vector<std::byte> newImageData;
    if (const auto* imageResource = this->getResource(Resource::TYPE_IMAGE_DATA); imageResource && this->hasImageData()) {
        if (this->format != newFormat && this->width == newWidth && this->height == newHeight && this->mipCount == newMipCount && this->frameCount == newFrameCount && faceCount == newFaceCount && this->sliceCount == newSliceCount) {
            newImageData = ImageConversion::convertSeveralImageDataToFormat(imageResource->data, this->format, newFormat, this->mipCount, this->frameCount, faceCount, this->width, this->height, this->sliceCount);
        } else {
            newImageData.resize(ImageFormatDetails::getDataLength(this->format, newMipCount, newFrameCount, newFaceCount, newWidth, newHeight, newSliceCount));
            for (int i = newMipCount - 1; i >= 0; i--) {
                for (int j = 0; j < newFrameCount; j++) {
                    for (int k = 0; k < newFaceCount; k++) {
                        for (int l = 0; l < newSliceCount; l++) {
                            if (i < this->mipCount && j < this->frameCount && k < faceCount && l < this->sliceCount) {
                                auto imageSpan = this->getImageDataRaw(i, j, k, l);
                                std::vector<std::byte> image{imageSpan.begin(), imageSpan.end()};
                                if (this->width != newWidth || this->height != newHeight) {
                                    image = ImageConversion::resizeImageData(image, this->format, ImageDimensions::getMipDim(i, this->width), ImageDimensions::getMipDim(i, newWidth), ImageDimensions::getMipDim(i, this->height), ImageDimensions::getMipDim(i, newHeight), this->imageDataIsSRGB(), filter);
                                }
                                if (uint32_t offset, length; ImageFormatDetails::getDataPosition(offset, length, this->format, i, newMipCount, j, newFrameCount, k, newFaceCount, newWidth, newHeight, l, newSliceCount) && image.size() == length) {
                                    std::memcpy(newImageData.data() + offset, image.data(), length);
                                }
                            }
                        }
                    }
                }
            }
            if (this->format != newFormat) {
                newImageData = ImageConversion::convertSeveralImageDataToFormat(newImageData, this->format, newFormat, newMipCount, newFrameCount, newFaceCount, newWidth, newHeight, newSliceCount);
            }
        }
    } else {
        newImageData.resize(ImageFormatDetails::getDataLength(newFormat, newMipCount, newFrameCount, newFaceCount, newWidth, newHeight, newSliceCount));
    }
 
    this->format = newFormat;
    this->width = newWidth;
    this->height = newHeight;
    this->mipCount = newMipCount;
    this->frameCount = newFrameCount;
    if (newFaceCount > 1) {
        this->flags |= FLAG_ENVMAP;
    } else {
        this->flags &= ~FLAG_ENVMAP;
    }
    this->sliceCount = newSliceCount;
 
    this->setResourceInternal(Resource::TYPE_IMAGE_DATA, newImageData);
}
 
std::vector<std::byte> VTF::getParticleSheetFrameDataRaw(uint16_t& spriteWidth, uint16_t& spriteHeight, uint32_t shtSequenceID, uint32_t shtFrame, uint8_t shtBounds, uint8_t mip, uint16_t frame, uint8_t face, uint16_t slice) const {
    spriteWidth = 0;
    spriteHeight = 0;
 
    auto shtResource = this->getResource(Resource::TYPE_PARTICLE_SHEET_DATA);
    if (!shtResource) {
        return {};
    }
 
    auto sht = shtResource->getDataAsParticleSheet();
    const auto* sequence = sht.getSequenceFromID(shtSequenceID);
    if (!sequence || sequence->frames.size() <= shtFrame || shtBounds >= sht.getFrameBoundsCount()) {
        return {};
    }
 
    // These values are likely slightly too large thanks to float magic, use a
    // shader that scales UVs instead of this function if precision is a concern
    // This will also break if any of the bounds are above 1 or below 0, but that
    // hasn't been observed in official textures
    const auto& bounds = sequence->frames[shtFrame].bounds[shtBounds];
    uint16_t x1 = std::clamp<uint16_t>(std::floor(bounds.x1 * static_cast<float>(this->getWidth(mip))),  0, this->getWidth(mip));
    uint16_t y1 = std::clamp<uint16_t>(std::ceil( bounds.y1 * static_cast<float>(this->getHeight(mip))), 0, this->getHeight(mip));
    uint16_t x2 = std::clamp<uint16_t>(std::ceil( bounds.x2 * static_cast<float>(this->getWidth(mip))),  0, this->getHeight(mip));
    uint16_t y2 = std::clamp<uint16_t>(std::floor(bounds.y2 * static_cast<float>(this->getHeight(mip))), 0, this->getWidth(mip));
 
    if (x1 > x2) [[unlikely]] {
        std::swap(x1, x2);
    }
    if (y1 > y2) [[unlikely]] {
        std::swap(y1, y2);
    }
    spriteWidth = x2 - x1;
    spriteWidth = y2 - y1;
 
    const auto out = ImageConversion::cropImageData(this->getImageDataRaw(mip, frame, face, slice), this->getFormat(), this->getWidth(mip), spriteWidth, x1, this->getHeight(mip), spriteHeight, y1);
    if (out.empty()) {
        spriteWidth = 0;
        spriteHeight = 0;
    }
    return out;
}
 
std::vector<std::byte> VTF::getParticleSheetFrameDataAs(ImageFormat newFormat, uint16_t& spriteWidth, uint16_t& spriteHeight, uint32_t shtSequenceID, uint32_t shtFrame, uint8_t shtBounds, uint8_t mip, uint16_t frame, uint8_t face, uint16_t slice) const {
    return ImageConversion::convertImageDataToFormat(this->getParticleSheetFrameDataRaw(spriteWidth, spriteHeight, shtSequenceID, shtFrame, shtBounds, mip, frame, face, slice), this->getFormat(), newFormat, spriteWidth, spriteHeight);
}
 
std::vector<std::byte> VTF::getParticleSheetFrameDataAsRGBA8888(uint16_t& spriteWidth, uint16_t& spriteHeight, uint32_t shtSequenceID, uint32_t shtFrame, uint8_t shtBounds, uint8_t mip, uint16_t frame, uint8_t face, uint16_t slice) const {
    return this->getParticleSheetFrameDataAs(ImageFormat::RGBA8888, spriteWidth, spriteHeight, shtSequenceID, shtFrame, shtBounds, mip, frame, face, slice);
}
 
void VTF::setParticleSheetResource(const SHT& value) {
    std::vector<std::byte> particleSheetData;
    BufferStream writer{particleSheetData};
 
    auto bakedSheet = value.bake();
    writer.write<uint32_t>(bakedSheet.size());
    writer.write(bakedSheet);
    particleSheetData.resize(writer.size());
 
    this->setResourceInternal(Resource::TYPE_PARTICLE_SHEET_DATA, particleSheetData);
}
 
void VTF::removeParticleSheetResource() {
    this->removeResourceInternal(Resource::TYPE_PARTICLE_SHEET_DATA);
}
 
void VTF::setCRCResource(uint32_t value) {
    this->setResourceInternal(Resource::TYPE_CRC, {reinterpret_cast<const std::byte*>(&value), sizeof(value)});
}
 
void VTF::removeCRCResource() {
    this->removeResourceInternal(Resource::TYPE_CRC);
}
 
void VTF::setLODResource(uint8_t u, uint8_t v, uint8_t u360, uint8_t v360) {
    uint32_t lodData;
    BufferStream writer{&lodData, sizeof(lodData)};
 
    writer << u << v << u360 << v360;
 
    this->setResourceInternal(Resource::TYPE_LOD_CONTROL_INFO, {reinterpret_cast<const std::byte*>(&lodData), sizeof(lodData)});
}
 
void VTF::removeLODResource() {
    this->removeResourceInternal(Resource::TYPE_LOD_CONTROL_INFO);
}
 
void VTF::setExtendedFlagsResource(uint32_t value) {
    this->setResourceInternal(Resource::TYPE_EXTENDED_FLAGS, {reinterpret_cast<const std::byte*>(&value), sizeof(value)});
}
 
void VTF::removeExtendedFlagsResource() {
    this->removeResourceInternal(Resource::TYPE_EXTENDED_FLAGS);
}
 
void VTF::setKeyValuesDataResource(const std::string& value) {
    std::vector<std::byte> keyValuesData;
    BufferStream writer{keyValuesData};
 
    writer.write<uint32_t>(value.size());
    writer.write(value, false);
    keyValuesData.resize(writer.size());
 
    this->setResourceInternal(Resource::TYPE_KEYVALUES_DATA, keyValuesData);
}
 
void VTF::removeKeyValuesDataResource() {
    this->removeResourceInternal(Resource::TYPE_KEYVALUES_DATA);
}
 
int16_t VTF::getCompressionLevel() const {
    return this->compressionLevel;
}
 
void VTF::setCompressionLevel(int16_t newCompressionLevel) {
    this->compressionLevel = newCompressionLevel;
}
 
CompressionMethod VTF::getCompressionMethod() const {
    return this->compressionMethod;
}
 
void VTF::setCompressionMethod(CompressionMethod newCompressionMethod) {
    if (newCompressionMethod == CompressionMethod::CONSOLE_LZMA && this->platform == VTF::PLATFORM_PC) {
        this->compressionMethod = CompressionMethod::ZSTD;
    } else if (newCompressionMethod != CompressionMethod::CONSOLE_LZMA && this->platform != VTF::PLATFORM_PC) {
        this->compressionMethod = CompressionMethod::CONSOLE_LZMA;
    } else {
        this->compressionMethod = newCompressionMethod;
    }
}
 
bool VTF::hasImageData() const {
    return this->format != ImageFormat::EMPTY && this->width > 0 && this->height > 0;
}
 
bool VTF::imageDataIsSRGB() const {
    return !ImageFormatDetails::large(this->format) && (this->flags & FLAG_MASK_SRGB);
}
 
std::span<const std::byte> VTF::getImageDataRaw(uint8_t mip, uint16_t frame, uint8_t face, uint16_t slice) const {
    if (const auto imageResource = this->getResource(Resource::TYPE_IMAGE_DATA)) {
        if (uint32_t offset, length; ImageFormatDetails::getDataPosition(offset, length, this->format, mip, this->mipCount, frame, this->frameCount, face, this->getFaceCount(), this->width, this->height, slice, this->sliceCount)) {
            return imageResource->data.subspan(offset, length);
        }
    }
    return {};
}
 
std::vector<std::byte> VTF::getImageDataAs(ImageFormat newFormat, uint8_t mip, uint16_t frame, uint8_t face, uint16_t slice) const {
    const auto rawImageData = this->getImageDataRaw(mip, frame, face, slice);
    if (rawImageData.empty()) {
        return {};
    }
    return ImageConversion::convertImageDataToFormat(rawImageData, this->format, newFormat, ImageDimensions::getMipDim(mip, this->width), ImageDimensions::getMipDim(mip, this->height));
}
 
std::vector<std::byte> VTF::getImageDataAsRGBA8888(uint8_t mip, uint16_t frame, uint8_t face, uint16_t slice) const {
    return this->getImageDataAs(ImageFormat::RGBA8888, mip, frame, face, slice);
}
 
bool VTF::setImage(std::span<const std::byte> imageData_, ImageFormat format_, uint16_t width_, uint16_t height_, ImageConversion::ResizeFilter filter, uint8_t mip, uint16_t frame, uint8_t face, uint16_t slice) {
    if (imageData_.empty()) {
        return false;
    }
 
    if (!this->hasImageData()) {
        uint16_t resizedWidth = width_, resizedHeight = height_;
        ImageConversion::setResizedDims(resizedWidth, this->imageWidthResizeMethod, resizedHeight, this->imageHeightResizeMethod);
        if (ImageFormatDetails::compressed(format_)) {
            resizedWidth += math::paddingForAlignment(4, resizedWidth);
            resizedHeight += math::paddingForAlignment(4, resizedHeight);
        }
        if (const auto newMipCount = ImageDimensions::getRecommendedMipCountForDims(format_, resizedWidth, resizedHeight); newMipCount <= mip) {
            mip = newMipCount - 1;
        }
        if (face > 6 || (face == 6 && (this->minorVersion < 1 || this->minorVersion > 4))) {
            return false;
        }
        this->regenerateImageData(format_, resizedWidth, resizedHeight, mip + 1, frame + 1, face ? (face < 5 ? 5 : face) : 0, slice + 1);
    }
 
    const auto faceCount = this->getFaceCount();
    if (this->mipCount <= mip || this->frameCount <= frame || faceCount <= face || this->sliceCount <= slice) {
        return false;
    }
 
    const auto* imageResource = this->getResource(Resource::TYPE_IMAGE_DATA);
    if (!imageResource) {
        return false;
    }
    if (uint32_t offset, length; ImageFormatDetails::getDataPosition(offset, length, this->format, mip, this->mipCount, frame, this->frameCount, face, faceCount, this->width, this->height, slice, this->sliceCount)) {
        std::vector<std::byte> image{imageData_.begin(), imageData_.end()};
        const auto newWidth = ImageDimensions::getMipDim(mip, this->width);
        const auto newHeight = ImageDimensions::getMipDim(mip, this->height);
        if (width_ != newWidth || height_ != newHeight) {
            image = ImageConversion::resizeImageData(image, format_, width_, newWidth, height_, newHeight, this->imageDataIsSRGB(), filter);
        }
        if (format_ != this->format) {
            image = ImageConversion::convertImageDataToFormat(image, format_, this->format, newWidth, newHeight);
        }
        std::memcpy(imageResource->data.data() + offset, image.data(), image.size());
    }
    return true;
}
 
bool VTF::setImage(const std::string& imagePath, ImageConversion::ResizeFilter filter, uint8_t mip, uint16_t frame, uint8_t face, uint16_t slice) {
    ImageFormat inputFormat;
    int inputWidth, inputHeight, inputFrameCount;
    auto imageData_ = ImageConversion::convertFileToImageData(fs::readFileBuffer(imagePath), inputFormat, inputWidth, inputHeight, inputFrameCount);
 
    // Unable to decode file
    if (imageData_.empty() || inputFormat == ImageFormat::EMPTY || !inputWidth || !inputHeight || !inputFrameCount) {
        return false;
    }
 
    // One frame (normal)
    if (inputFrameCount == 1) {
        return this->setImage(imageData_, inputFormat, inputWidth, inputHeight, filter, mip, frame, face, slice);
    }
 
    // Multiple frames (GIF)
    bool allSuccess = true;
    const auto frameSize = ImageFormatDetails::getDataLength(inputFormat, inputWidth, inputHeight);
    for (int currentFrame = 0; currentFrame < inputFrameCount; currentFrame++) {
        if (!this->setImage({imageData_.data() + currentFrame * frameSize, imageData_.data() + currentFrame * frameSize + frameSize}, inputFormat, inputWidth, inputHeight, filter, mip, frame + currentFrame, face, slice)) {
            allSuccess = false;
        }
        if (currentFrame == 0 && this->frameCount < frame + inputFrameCount) {
            // Call this after setting the first image, this function is a no-op if no image data is present yet
            this->setFrameCount(frame + inputFrameCount);
        }
    }
    return allSuccess;
}
 
std::vector<std::byte> VTF::saveImageToFile(uint8_t mip, uint16_t frame, uint8_t face, uint16_t slice, ImageConversion::FileFormat fileFormat) const {
    return ImageConversion::convertImageDataToFile(this->getImageDataRaw(mip, frame, face, slice), this->format, ImageDimensions::getMipDim(mip, this->width), ImageDimensions::getMipDim(mip, this->height), fileFormat);
}
 
bool VTF::saveImageToFile(const std::string& imagePath, uint8_t mip, uint16_t frame, uint8_t face, uint16_t slice, ImageConversion::FileFormat fileFormat) const {
    if (auto data_ = this->saveImageToFile(mip, frame, face, slice, fileFormat); !data_.empty()) {
        return fs::writeFileBuffer(imagePath, data_);
    }
    return false;
}
 
bool VTF::hasThumbnailData() const {
    return this->thumbnailFormat != ImageFormat::EMPTY && this->thumbnailWidth > 0 && this->thumbnailHeight > 0;
}
 
std::span<const std::byte> VTF::getThumbnailDataRaw() const {
    if (const auto thumbnailResource = this->getResource(Resource::TYPE_THUMBNAIL_DATA)) {
        return thumbnailResource->data;
    }
    return {};
}
 
std::vector<std::byte> VTF::getThumbnailDataAs(ImageFormat newFormat) const {
    const auto rawThumbnailData = this->getThumbnailDataRaw();
    if (rawThumbnailData.empty()) {
        return {};
    }
    return ImageConversion::convertImageDataToFormat(rawThumbnailData, this->thumbnailFormat, newFormat, this->thumbnailWidth, this->thumbnailHeight);
}
 
std::vector<std::byte> VTF::getThumbnailDataAsRGBA8888() const {
    return this->getThumbnailDataAs(ImageFormat::RGBA8888);
}
 
void VTF::setThumbnail(std::span<const std::byte> imageData_, ImageFormat format_, uint16_t width_, uint16_t height_) {
    if (format_ != this->thumbnailFormat) {
        this->setResourceInternal(Resource::TYPE_THUMBNAIL_DATA, ImageConversion::convertImageDataToFormat(imageData_, format_, this->thumbnailFormat, width_, height_));
    } else {
        this->setResourceInternal(Resource::TYPE_THUMBNAIL_DATA, imageData_);
    }
    this->thumbnailWidth = width_;
    this->thumbnailHeight = height_;
}
 
void VTF::computeThumbnail(ImageConversion::ResizeFilter filter) {
    if (!this->hasImageData()) {
        return;
    }
    this->thumbnailFormat = ImageFormat::DXT1;
    this->thumbnailWidth = 16;
    this->thumbnailHeight = 16;
    this->setResourceInternal(Resource::TYPE_THUMBNAIL_DATA, ImageConversion::convertImageDataToFormat(ImageConversion::resizeImageData(this->getImageDataRaw(), this->format, this->width, this->thumbnailWidth, this->height, this->thumbnailHeight, this->flags & FLAG_SRGB, filter), this->format, this->thumbnailFormat, this->thumbnailWidth, this->thumbnailHeight));
}
 
void VTF::removeThumbnail() {
    this->thumbnailFormat = ImageFormat::EMPTY;
    this->thumbnailWidth = 0;
    this->thumbnailHeight = 0;
    this->removeResourceInternal(Resource::TYPE_THUMBNAIL_DATA);
}
 
std::vector<std::byte> VTF::saveThumbnailToFile(ImageConversion::FileFormat fileFormat) const {
    return ImageConversion::convertImageDataToFile(this->getThumbnailDataRaw(), this->thumbnailFormat, this->thumbnailWidth, this->thumbnailHeight, fileFormat);
}
 
bool VTF::saveThumbnailToFile(const std::string& imagePath, ImageConversion::FileFormat fileFormat) const {
    if (auto data_ = this->saveThumbnailToFile(fileFormat); !data_.empty()) {
        return fs::writeFileBuffer(imagePath, data_);
    }
    return false;
}
 
std::vector<std::byte> VTF::bake() const {
    std::vector<std::byte> out;
    BufferStream writer{out};
 
    static constexpr auto writeNonLocalResource = [](BufferStream& writer_, Resource::Type type, std::span<const std::byte> data, VTF::Platform platform) {
        if (platform != VTF::PLATFORM_PC) {
            BufferStream::swap_endian(reinterpret_cast<uint32_t*>(&type));
        }
        writer_.write<uint32_t>(type);
        const auto resourceOffsetPos = writer_.tell();
        writer_.seek(0, std::ios::end);
        const auto resourceOffsetValue = writer_.tell();
        writer_.write(data);
        writer_.seek_u(resourceOffsetPos).write<uint32_t>(resourceOffsetValue);
    };
 
    if (this->platform != PLATFORM_PC) {
        writer << (this->platform == PLATFORM_PS3_PORTAL2 ? VTF3_SIGNATURE : VTFX_SIGNATURE);
        writer.set_big_endian(true);
 
        if (this->platform == PLATFORM_PS3_PORTAL2) {
            writer << PLATFORM_PS3_ORANGEBOX;
        } else {
            writer << this->platform;
        }
        writer.write<uint32_t>(8);
        const auto headerLengthPos = writer.tell();
        writer
            .write<uint32_t>(0)
            .write(this->flags)
            .write(this->width)
            .write(this->height)
            .write(this->sliceCount)
            .write(this->frameCount);
        const auto preloadPos = writer.tell();
        writer
            .write<uint16_t>(0) // preload size
            .write<uint8_t>(0) // skip higher mips
            .write<uint8_t>(this->resources.size())
            .write(this->reflectivity[0])
            .write(this->reflectivity[1])
            .write(this->reflectivity[2])
            .write(this->bumpMapScale)
            .write(this->format)
            .write<uint8_t>(std::clamp(static_cast<int>(std::roundf(this->reflectivity[0] * 255)), 0, 255))
            .write<uint8_t>(std::clamp(static_cast<int>(std::roundf(this->reflectivity[1] * 255)), 0, 255))
            .write<uint8_t>(std::clamp(static_cast<int>(std::roundf(this->reflectivity[2] * 255)), 0, 255))
            .write<uint8_t>(255);
        const auto compressionPos = writer.tell();
        writer.write<uint32_t>(0); // compressed length
 
        if (this->platform == PLATFORM_PS3_PORTAL2) {
            // 16 byte aligned
            writer.write<uint32_t>(0);
        }
 
        std::vector<std::byte> imageResourceData;
        bool hasCompression = false;
        if (const auto* imageResource = this->getResource(Resource::TYPE_IMAGE_DATA)) {
            imageResourceData.assign(imageResource->data.begin(), imageResource->data.end());
            ::swapImageDataEndianForConsole(imageResourceData, this->format, this->width, this->height, this->platform);
 
            // Compression has only been observed in X360 and PS3_PORTAL2 VTFs so far
            // todo(vtfpp): check PS3_ORANGEBOX cubemaps for compression
            if ((this->platform == VTF::PLATFORM_X360 || this->platform == PLATFORM_PS3_PORTAL2) && (hasCompression = this->compressionMethod == CompressionMethod::CONSOLE_LZMA)) {
                auto fixedCompressionLevel = this->compressionLevel;
                if (this->compressionLevel == 0) {
                    // Compression level defaults to 0, so it works differently on console.
                    // Rather than not compress on 0, 0 will be replaced with the default
                    // compression level (6) if the compression method is LZMA.
                    fixedCompressionLevel = 6;
                }
                auto compressedData = compression::compressValveLZMA(imageResourceData, fixedCompressionLevel);
                if (compressedData) {
                    imageResourceData.assign(compressedData->begin(), compressedData->end());
                } else {
                    hasCompression = false;
                }
            }
        }
 
        const auto resourceStart = writer.tell();
        const auto headerSize = resourceStart + (this->getResources().size() * sizeof(uint64_t));
        writer.seek_u(headerLengthPos).write<uint32_t>(headerSize).seek_u(resourceStart);
        while (writer.tell() < headerSize) {
            writer.write<uint64_t>(0);
        }
        writer.seek_u(resourceStart);
 
        for (const auto resourceType : Resource::getOrder()) {
            if (resourceType == Resource::TYPE_IMAGE_DATA) {
                auto curPos = writer.tell();
                const auto imagePos = writer.seek(0, std::ios::end).tell();
                writer.seek_u(preloadPos).write<uint16_t>(imagePos).seek_u(curPos);
 
                writeNonLocalResource(writer, resourceType, imageResourceData, this->platform);
 
                if (hasCompression) {
                    curPos = writer.tell();
                    writer.seek_u(compressionPos).write<uint32_t>(imageResourceData.size()).seek_u(curPos);
                }
            } else if (const auto* resource = this->getResource(resourceType)) {
                std::vector<std::byte> resData{resource->data.begin(), resource->data.end()};
 
                // If tweaking this switch, tweak the one in ctor as well
                switch (resource->type) {
                    default:
                    case Resource::TYPE_UNKNOWN:
                    case Resource::TYPE_CRC:
                    case Resource::TYPE_LOD_CONTROL_INFO:
                    case Resource::TYPE_AUX_COMPRESSION: // Strata-specific
                        break;
                    case Resource::TYPE_THUMBNAIL_DATA:
                        ::swapImageDataEndianForConsole(resData, this->thumbnailFormat, this->thumbnailWidth, this->thumbnailHeight, this->platform);
                        break;
                    case Resource::TYPE_PARTICLE_SHEET_DATA:
                    case Resource::TYPE_EXTENDED_FLAGS:
                    case Resource::TYPE_KEYVALUES_DATA:
                        if (resData.size() >= sizeof(uint32_t)) {
                            BufferStream::swap_endian(reinterpret_cast<uint32_t*>(resData.data()));
                        }
                        break;
                }
 
                if ((resource->flags & Resource::FLAG_LOCAL_DATA) && resource->data.size() == sizeof(uint32_t)) {
                    writer.set_big_endian(false);
                    writer.write<uint32_t>((Resource::FLAG_LOCAL_DATA << 24) | resource->type);
                    writer.set_big_endian(true);
                    writer.write(resource->data);
                } else {
                    writeNonLocalResource(writer, resource->type, resource->data, this->platform);
                }
            }
        }
 
        out.resize(writer.size());
        return out;
    }
 
    writer << VTF_SIGNATURE << this->majorVersion << this->minorVersion;
    const auto headerLengthPos = writer.tell();
    writer.write<uint32_t>(0);
 
    writer
        .write(this->width)
        .write(this->height)
        .write(this->flags)
        .write(this->frameCount)
        .write(this->startFrame)
        .write<uint32_t>(0) // padding
        .write(this->reflectivity)
        .write<uint32_t>(0) // padding
        .write(this->bumpMapScale)
        .write(this->format)
        .write(this->mipCount)
        .write(ImageFormat::DXT1)
        .write(this->thumbnailWidth)
        .write(this->thumbnailHeight);
 
    if (this->minorVersion >= 2) {
        writer << this->sliceCount;
    }
 
    if (this->minorVersion < 3) {
        const auto headerAlignment = math::paddingForAlignment(16, writer.tell());
        for (uint16_t i = 0; i < headerAlignment; i++) {
            writer.write<std::byte>({});
        }
        const auto headerSize = writer.tell();
        writer.seek_u(headerLengthPos).write<uint32_t>(headerSize).seek_u(headerSize);
 
        if (const auto* thumbnailResource = this->getResource(Resource::TYPE_THUMBNAIL_DATA); thumbnailResource && this->hasThumbnailData()) {
            writer.write(thumbnailResource->data);
        }
        if (const auto* imageResource = this->getResource(Resource::TYPE_IMAGE_DATA); imageResource && this->hasImageData()) {
            writer.write(imageResource->data);
        }
    } else {
        std::vector<std::byte> auxCompressionResourceData;
        std::vector<std::byte> compressedImageResourceData;
        bool hasAuxCompression = false;
        if (const auto* imageResource = this->getResource(Resource::TYPE_IMAGE_DATA)) {
            hasAuxCompression = this->minorVersion >= 6 && this->compressionLevel != 0;
            if (hasAuxCompression) {
                const auto faceCount = this->getFaceCount();
                auxCompressionResourceData.resize((this->mipCount * this->frameCount * faceCount + 2) * sizeof(uint32_t));
                BufferStream auxWriter{auxCompressionResourceData, false};
 
                // Format of aux resource is as follows, with each item of unspecified type being a 4 byte integer:
                // - Size of resource in bytes, not counting this int
                // - Compression level, method (2 byte integers)
                // - (X times) Size of each mip-face-frame combo
                auxWriter
                    .write<uint32_t>(auxCompressionResourceData.size() - sizeof(uint32_t))
                    .write(this->compressionLevel)
                    .write(this->compressionMethod);
 
                for (int i = this->mipCount - 1; i >= 0; i--) {
                    for (int j = 0; j < this->frameCount; j++) {
                        for (int k = 0; k < faceCount; k++) {
                            if (uint32_t offset, length; ImageFormatDetails::getDataPosition(offset, length, this->format, i, this->mipCount, j, this->frameCount, k, faceCount, this->width, this->height, 0, this->sliceCount)) {
                                auto compressedData = ::compressData({imageResource->data.data() + offset, length * this->sliceCount}, this->compressionLevel, this->compressionMethod);
                                compressedImageResourceData.insert(compressedImageResourceData.end(), compressedData.begin(), compressedData.end());
                                auxWriter.write<uint32_t>(compressedData.size());
                            }
                        }
                    }
                }
            }
        }
 
        writer
            .write<uint8_t>(0) // padding
            .write<uint8_t>(0) // padding
            .write<uint8_t>(0) // padding
            .write<uint32_t>(this->getResources().size() + hasAuxCompression)
            .write<uint64_t>(0); // padding
 
        const auto resourceStart = writer.tell();
        const auto headerSize = resourceStart + ((this->getResources().size() + hasAuxCompression) * sizeof(uint64_t));
        writer.seek_u(headerLengthPos).write<uint32_t>(headerSize).seek_u(resourceStart);
        while (writer.tell() < headerSize) {
            writer.write<uint64_t>(0);
        }
        writer.seek_u(resourceStart);
 
        for (const auto resourceType : Resource::getOrder()) {
            if (hasAuxCompression && resourceType == Resource::TYPE_AUX_COMPRESSION) {
                writeNonLocalResource(writer, resourceType, auxCompressionResourceData, this->platform);
            } else if (hasAuxCompression && resourceType == Resource::TYPE_IMAGE_DATA) {
                writeNonLocalResource(writer, resourceType, compressedImageResourceData, this->platform);
            } else if (const auto* resource = this->getResource(resourceType)) {
                if ((resource->flags & Resource::FLAG_LOCAL_DATA) && resource->data.size() == sizeof(uint32_t)) {
                    writer.write<uint32_t>((Resource::FLAG_LOCAL_DATA << 24) | resource->type);
                    writer.write(resource->data);
                } else {
                    writeNonLocalResource(writer, resource->type, resource->data, this->platform);
                }
            }
        }
    }
 
    out.resize(writer.size());
    return out;
}
 
bool VTF::bake(const std::string& vtfPath) const {
    return fs::writeFileBuffer(vtfPath, this->bake());
}