Method validateHeader

tools/ktx2check/ktx2check.cpp:1228–1392

}

void
ktxValidator::validateHeader(validationContext& ctx)
{
    ktx_uint8_t identifier_reference[12] = KTX2_IDENTIFIER_REF;
    ktx_uint32_t max_dim;

    ctx.inp->read((char *)&ctx.header, sizeof(KTX_header2));
    if (ctx.inp->fail())
        addIssue(logger::eFatal, IOError.FileRead, strerror(errno));
    else if (ctx.inp->eof())
        addIssue(logger::eFatal, IOError.UnexpectedEOF);

    // Is this a KTX2 file?
    if (memcmp(&ctx.header.identifier, identifier_reference, 12) != 0) {
        addIssue(logger::eFatal, FileError.NotKTX2);
    }

    if (isProhibitedFormat((VkFormat)ctx.header.vkFormat))
        addIssue(logger::eError, HeaderData.ProhibitedFormat);

    if (!isValidFormat((VkFormat)ctx.header.vkFormat)) {
        if (ctx.header.vkFormat <= VK_FORMAT_MAX_STANDARD_ENUM || ctx.header.vkFormat > 0x10010000)
            addIssue(logger::eError, HeaderData.InvalidFormat, ctx.header.vkFormat);
        else
            addIssue(logger::eError, HeaderData.UnknownFormat, ctx.header.vkFormat);
    }

    /* Check texture dimensions. KTX files can store 8 types of textures:
       1D, 2D, 3D, cube, and array variants of these. There is currently
       no extension for 3D array textures in any 3D API. */
    if (ctx.header.pixelWidth == 0)
        addIssue(logger::eError, HeaderData.WidthZero);

    if (ctx.header.pixelDepth > 0 && ctx.header.pixelHeight == 0)
        addIssue(logger::eError, HeaderData.DepthNoHeight);

    if (ctx.header.pixelDepth > 0)
    {
        if (ctx.header.layerCount > 0) {
            /* No 3D array textures yet. */
            addIssue(logger::eWarning, HeaderData.ThreeDArray);
        } else
            ctx.dimensionCount = 3;
    }
    else if (ctx.header.pixelHeight > 0)
    {
        ctx.dimensionCount = 2;
    }
    else
    {
        ctx.dimensionCount = 1;
    }

    if (ctx.header.faceCount == 6)
    {
        if (ctx.dimensionCount != 2)
        {
            /* cube map needs 2D faces */