///////////////////////////////////////////////////
// KTX2 Header.
///////////////////////////////////////////////////
const KHR_SUPERCOMPRESSION_NONE = 0;
const KHR_SUPERCOMPRESSION_BASISLZ = 1;
const KHR_SUPERCOMPRESSION_ZSTD = 2;
const KHR_SUPERCOMPRESSION_ZLIB = 3;
///////////////////////////////////////////////////
// Data Format Descriptor (DFD).
///////////////////////////////////////////////////
const KHR_DF_KHR_DESCRIPTORTYPE_BASICFORMAT = 0;
const KHR_DF_VENDORID_KHRONOS = 0;
const KHR_DF_VERSION = 2;
const KHR_DF_MODEL_UNSPECIFIED = 0;
const KHR_DF_MODEL_RGBSDA = 1;
// ...
const KHR_DF_MODEL_ETC1 = 160;
const KHR_DF_MODEL_ETC2 = 161;
const KHR_DF_MODEL_ASTC = 162;
const KHR_DF_MODEL_ETC1S = 163;
const KHR_DF_MODEL_UASTC = 166;
const KHR_DF_FLAG_ALPHA_STRAIGHT = 0;
const KHR_DF_FLAG_ALPHA_PREMULTIPLIED = 1;
const KHR_DF_TRANSFER_UNSPECIFIED = 0;
const KHR_DF_TRANSFER_LINEAR = 1;
const KHR_DF_TRANSFER_SRGB = 2;
const KHR_DF_TRANSFER_ITU = 3;
const KHR_DF_TRANSFER_NTSC = 4;
const KHR_DF_TRANSFER_SLOG = 5;
const KHR_DF_TRANSFER_SLOG2 = 6;
const KHR_DF_TRANSFER_BT1886 = 7;
const KHR_DF_TRANSFER_HLG_OETF = 8;
const KHR_DF_TRANSFER_HLG_EOTF = 9;
const KHR_DF_TRANSFER_PQ_EOTF = 10;
const KHR_DF_TRANSFER_PQ_OETF = 11;
const KHR_DF_TRANSFER_DCIP3 = 12;
const KHR_DF_TRANSFER_PAL_OETF = 13;
const KHR_DF_TRANSFER_PAL625_EOTF = 14;
const KHR_DF_TRANSFER_ST240 = 15;
const KHR_DF_TRANSFER_ACESCC = 16;
const KHR_DF_TRANSFER_ACESCCT = 17;
const KHR_DF_TRANSFER_ADOBERGB = 18;
const KHR_DF_PRIMARIES_UNSPECIFIED = 0;
const KHR_DF_PRIMARIES_BT709 = 1;
const KHR_DF_PRIMARIES_BT601_EBU = 2;
const KHR_DF_PRIMARIES_BT601_SMPTE = 3;
const KHR_DF_PRIMARIES_BT2020 = 4;
const KHR_DF_PRIMARIES_CIEXYZ = 5;
const KHR_DF_PRIMARIES_ACES = 6;
const KHR_DF_PRIMARIES_ACESCC = 7;
const KHR_DF_PRIMARIES_NTSC1953 = 8;
const KHR_DF_PRIMARIES_PAL525 = 9;
const KHR_DF_PRIMARIES_DISPLAYP3 = 10;
const KHR_DF_PRIMARIES_ADOBERGB = 11;
const KHR_DF_CHANNEL_RGBSDA_RED = 0;
const KHR_DF_CHANNEL_RGBSDA_GREEN = 1;
const KHR_DF_CHANNEL_RGBSDA_BLUE = 2;
const KHR_DF_CHANNEL_RGBSDA_STENCIL = 13;
const KHR_DF_CHANNEL_RGBSDA_DEPTH = 14;
const KHR_DF_CHANNEL_RGBSDA_ALPHA = 15;
const KHR_DF_SAMPLE_DATATYPE_FLOAT = 0x80;
const KHR_DF_SAMPLE_DATATYPE_SIGNED = 0x40;
const KHR_DF_SAMPLE_DATATYPE_EXPONENT = 0x20;
const KHR_DF_SAMPLE_DATATYPE_LINEAR = 0x10;
///////////////////////////////////////////////////
// VK FORMAT.
///////////////////////////////////////////////////
const VK_FORMAT_UNDEFINED = 0;
const VK_FORMAT_R4G4_UNORM_PACK8 = 1;
const VK_FORMAT_R4G4B4A4_UNORM_PACK16 = 2;
const VK_FORMAT_B4G4R4A4_UNORM_PACK16 = 3;
const VK_FORMAT_R5G6B5_UNORM_PACK16 = 4;
const VK_FORMAT_B5G6R5_UNORM_PACK16 = 5;
const VK_FORMAT_R5G5B5A1_UNORM_PACK16 = 6;
const VK_FORMAT_B5G5R5A1_UNORM_PACK16 = 7;
const VK_FORMAT_A1R5G5B5_UNORM_PACK16 = 8;
const VK_FORMAT_R8_UNORM = 9;
const VK_FORMAT_R8_SNORM = 10;
const VK_FORMAT_R8_UINT = 13;
const VK_FORMAT_R8_SINT = 14;
const VK_FORMAT_R8_SRGB = 15;
const VK_FORMAT_R8G8_UNORM = 16;
const VK_FORMAT_R8G8_SNORM = 17;
const VK_FORMAT_R8G8_UINT = 20;
const VK_FORMAT_R8G8_SINT = 21;
const VK_FORMAT_R8G8_SRGB = 22;
const VK_FORMAT_R8G8B8_UNORM = 23;
const VK_FORMAT_R8G8B8_SNORM = 24;
const VK_FORMAT_R8G8B8_UINT = 27;
const VK_FORMAT_R8G8B8_SINT = 28;
const VK_FORMAT_R8G8B8_SRGB = 29;
const VK_FORMAT_B8G8R8_UNORM = 30;
const VK_FORMAT_B8G8R8_SNORM = 31;
const VK_FORMAT_B8G8R8_UINT = 34;
const VK_FORMAT_B8G8R8_SINT = 35;
const VK_FORMAT_B8G8R8_SRGB = 36;
const VK_FORMAT_R8G8B8A8_UNORM = 37;
const VK_FORMAT_R8G8B8A8_SNORM = 38;
const VK_FORMAT_R8G8B8A8_UINT = 41;
const VK_FORMAT_R8G8B8A8_SINT = 42;
const VK_FORMAT_R8G8B8A8_SRGB = 43;
const VK_FORMAT_B8G8R8A8_UNORM = 44;
const VK_FORMAT_B8G8R8A8_SNORM = 45;
const VK_FORMAT_B8G8R8A8_UINT = 48;
const VK_FORMAT_B8G8R8A8_SINT = 49;
const VK_FORMAT_B8G8R8A8_SRGB = 50;
const VK_FORMAT_A2R10G10B10_UNORM_PACK32 = 58;
const VK_FORMAT_A2R10G10B10_SNORM_PACK32 = 59;
const VK_FORMAT_A2R10G10B10_UINT_PACK32 = 62;
const VK_FORMAT_A2R10G10B10_SINT_PACK32 = 63;
const VK_FORMAT_A2B10G10R10_UNORM_PACK32 = 64;
const VK_FORMAT_A2B10G10R10_SNORM_PACK32 = 65;
const VK_FORMAT_A2B10G10R10_UINT_PACK32 = 68;
const VK_FORMAT_A2B10G10R10_SINT_PACK32 = 69;
const VK_FORMAT_R16_UNORM = 70;
const VK_FORMAT_R16_SNORM = 71;
const VK_FORMAT_R16_UINT = 74;
const VK_FORMAT_R16_SINT = 75;
const VK_FORMAT_R16_SFLOAT = 76;
const VK_FORMAT_R16G16_UNORM = 77;
const VK_FORMAT_R16G16_SNORM = 78;
const VK_FORMAT_R16G16_UINT = 81;
const VK_FORMAT_R16G16_SINT = 82;
const VK_FORMAT_R16G16_SFLOAT = 83;
const VK_FORMAT_R16G16B16_UNORM = 84;
const VK_FORMAT_R16G16B16_SNORM = 85;
const VK_FORMAT_R16G16B16_UINT = 88;
const VK_FORMAT_R16G16B16_SINT = 89;
const VK_FORMAT_R16G16B16_SFLOAT = 90;
const VK_FORMAT_R16G16B16A16_UNORM = 91;
const VK_FORMAT_R16G16B16A16_SNORM = 92;
const VK_FORMAT_R16G16B16A16_UINT = 95;
const VK_FORMAT_R16G16B16A16_SINT = 96;
const VK_FORMAT_R16G16B16A16_SFLOAT = 97;
const VK_FORMAT_R32_UINT = 98;
const VK_FORMAT_R32_SINT = 99;
const VK_FORMAT_R32_SFLOAT = 100;
const VK_FORMAT_R32G32_UINT = 101;
const VK_FORMAT_R32G32_SINT = 102;
const VK_FORMAT_R32G32_SFLOAT = 103;
const VK_FORMAT_R32G32B32_UINT = 104;
const VK_FORMAT_R32G32B32_SINT = 105;
const VK_FORMAT_R32G32B32_SFLOAT = 106;
const VK_FORMAT_R32G32B32A32_UINT = 107;
const VK_FORMAT_R32G32B32A32_SINT = 108;
const VK_FORMAT_R32G32B32A32_SFLOAT = 109;
const VK_FORMAT_R64_UINT = 110;
const VK_FORMAT_R64_SINT = 111;
const VK_FORMAT_R64_SFLOAT = 112;
const VK_FORMAT_R64G64_UINT = 113;
const VK_FORMAT_R64G64_SINT = 114;
const VK_FORMAT_R64G64_SFLOAT = 115;
const VK_FORMAT_R64G64B64_UINT = 116;
const VK_FORMAT_R64G64B64_SINT = 117;
const VK_FORMAT_R64G64B64_SFLOAT = 118;
const VK_FORMAT_R64G64B64A64_UINT = 119;
const VK_FORMAT_R64G64B64A64_SINT = 120;
const VK_FORMAT_R64G64B64A64_SFLOAT = 121;
const VK_FORMAT_B10G11R11_UFLOAT_PACK32 = 122;
const VK_FORMAT_E5B9G9R9_UFLOAT_PACK32 = 123;
const VK_FORMAT_D16_UNORM = 124;
const VK_FORMAT_X8_D24_UNORM_PACK32 = 125;
const VK_FORMAT_D32_SFLOAT = 126;
const VK_FORMAT_S8_UINT = 127;
const VK_FORMAT_D16_UNORM_S8_UINT = 128;
const VK_FORMAT_D24_UNORM_S8_UINT = 129;
const VK_FORMAT_D32_SFLOAT_S8_UINT = 130;
const VK_FORMAT_BC1_RGB_UNORM_BLOCK = 131;
const VK_FORMAT_BC1_RGB_SRGB_BLOCK = 132;
const VK_FORMAT_BC1_RGBA_UNORM_BLOCK = 133;
const VK_FORMAT_BC1_RGBA_SRGB_BLOCK = 134;
const VK_FORMAT_BC2_UNORM_BLOCK = 135;
const VK_FORMAT_BC2_SRGB_BLOCK = 136;
const VK_FORMAT_BC3_UNORM_BLOCK = 137;
const VK_FORMAT_BC3_SRGB_BLOCK = 138;
const VK_FORMAT_BC4_UNORM_BLOCK = 139;
const VK_FORMAT_BC4_SNORM_BLOCK = 140;
const VK_FORMAT_BC5_UNORM_BLOCK = 141;
const VK_FORMAT_BC5_SNORM_BLOCK = 142;
const VK_FORMAT_BC6H_UFLOAT_BLOCK = 143;
const VK_FORMAT_BC6H_SFLOAT_BLOCK = 144;
const VK_FORMAT_BC7_UNORM_BLOCK = 145;
const VK_FORMAT_BC7_SRGB_BLOCK = 146;
const VK_FORMAT_ETC2_R8G8B8_UNORM_BLOCK = 147;
const VK_FORMAT_ETC2_R8G8B8_SRGB_BLOCK = 148;
const VK_FORMAT_ETC2_R8G8B8A1_UNORM_BLOCK = 149;
const VK_FORMAT_ETC2_R8G8B8A1_SRGB_BLOCK = 150;
const VK_FORMAT_ETC2_R8G8B8A8_UNORM_BLOCK = 151;
const VK_FORMAT_ETC2_R8G8B8A8_SRGB_BLOCK = 152;
const VK_FORMAT_EAC_R11_UNORM_BLOCK = 153;
const VK_FORMAT_EAC_R11_SNORM_BLOCK = 154;
const VK_FORMAT_EAC_R11G11_UNORM_BLOCK = 155;
const VK_FORMAT_EAC_R11G11_SNORM_BLOCK = 156;
const VK_FORMAT_ASTC_4x4_UNORM_BLOCK = 157;
const VK_FORMAT_ASTC_4x4_SRGB_BLOCK = 158;
const VK_FORMAT_ASTC_5x4_UNORM_BLOCK = 159;
const VK_FORMAT_ASTC_5x4_SRGB_BLOCK = 160;
const VK_FORMAT_ASTC_5x5_UNORM_BLOCK = 161;
const VK_FORMAT_ASTC_5x5_SRGB_BLOCK = 162;
const VK_FORMAT_ASTC_6x5_UNORM_BLOCK = 163;
const VK_FORMAT_ASTC_6x5_SRGB_BLOCK = 164;
const VK_FORMAT_ASTC_6x6_UNORM_BLOCK = 165;
const VK_FORMAT_ASTC_6x6_SRGB_BLOCK = 166;
const VK_FORMAT_ASTC_8x5_UNORM_BLOCK = 167;
const VK_FORMAT_ASTC_8x5_SRGB_BLOCK = 168;
const VK_FORMAT_ASTC_8x6_UNORM_BLOCK = 169;
const VK_FORMAT_ASTC_8x6_SRGB_BLOCK = 170;
const VK_FORMAT_ASTC_8x8_UNORM_BLOCK = 171;
const VK_FORMAT_ASTC_8x8_SRGB_BLOCK = 172;
const VK_FORMAT_ASTC_10x5_UNORM_BLOCK = 173;
const VK_FORMAT_ASTC_10x5_SRGB_BLOCK = 174;
const VK_FORMAT_ASTC_10x6_UNORM_BLOCK = 175;
const VK_FORMAT_ASTC_10x6_SRGB_BLOCK = 176;
const VK_FORMAT_ASTC_10x8_UNORM_BLOCK = 177;
const VK_FORMAT_ASTC_10x8_SRGB_BLOCK = 178;
const VK_FORMAT_ASTC_10x10_UNORM_BLOCK = 179;
const VK_FORMAT_ASTC_10x10_SRGB_BLOCK = 180;
const VK_FORMAT_ASTC_12x10_UNORM_BLOCK = 181;
const VK_FORMAT_ASTC_12x10_SRGB_BLOCK = 182;
const VK_FORMAT_ASTC_12x12_UNORM_BLOCK = 183;
const VK_FORMAT_ASTC_12x12_SRGB_BLOCK = 184;
const VK_FORMAT_R10X6_UNORM_PACK16 = 1000156007;
const VK_FORMAT_R10X6G10X6_UNORM_2PACK16 = 1000156008;
const VK_FORMAT_R10X6G10X6B10X6A10X6_UNORM_4PACK16 = 1000156009;
const VK_FORMAT_G10X6B10X6G10X6R10X6_422_UNORM_4PACK16 = 1000156010;
const VK_FORMAT_B10X6G10X6R10X6G10X6_422_UNORM_4PACK16 = 1000156011;
const VK_FORMAT_R12X4_UNORM_PACK16 = 1000156017;
const VK_FORMAT_R12X4G12X4_UNORM_2PACK16 = 1000156018;
const VK_FORMAT_R12X4G12X4B12X4A12X4_UNORM_4PACK16 = 1000156019;
const VK_FORMAT_G12X4B12X4G12X4R12X4_422_UNORM_4PACK16 = 1000156020;
const VK_FORMAT_B12X4G12X4R12X4G12X4_422_UNORM_4PACK16 = 1000156021;
const VK_FORMAT_PVRTC1_2BPP_UNORM_BLOCK_IMG = 1000054000;
const VK_FORMAT_PVRTC1_4BPP_UNORM_BLOCK_IMG = 1000054001;
const VK_FORMAT_PVRTC2_2BPP_UNORM_BLOCK_IMG = 1000054002;
const VK_FORMAT_PVRTC2_4BPP_UNORM_BLOCK_IMG = 1000054003;
const VK_FORMAT_PVRTC1_2BPP_SRGB_BLOCK_IMG = 1000054004;
const VK_FORMAT_PVRTC1_4BPP_SRGB_BLOCK_IMG = 1000054005;
const VK_FORMAT_PVRTC2_2BPP_SRGB_BLOCK_IMG = 1000054006;
const VK_FORMAT_PVRTC2_4BPP_SRGB_BLOCK_IMG = 1000054007;
const VK_FORMAT_ASTC_4x4_SFLOAT_BLOCK_EXT = 1000066000;
const VK_FORMAT_ASTC_5x4_SFLOAT_BLOCK_EXT = 1000066001;
const VK_FORMAT_ASTC_5x5_SFLOAT_BLOCK_EXT = 1000066002;
const VK_FORMAT_ASTC_6x5_SFLOAT_BLOCK_EXT = 1000066003;
const VK_FORMAT_ASTC_6x6_SFLOAT_BLOCK_EXT = 1000066004;
const VK_FORMAT_ASTC_8x5_SFLOAT_BLOCK_EXT = 1000066005;
const VK_FORMAT_ASTC_8x6_SFLOAT_BLOCK_EXT = 1000066006;
const VK_FORMAT_ASTC_8x8_SFLOAT_BLOCK_EXT = 1000066007;
const VK_FORMAT_ASTC_10x5_SFLOAT_BLOCK_EXT = 1000066008;
const VK_FORMAT_ASTC_10x6_SFLOAT_BLOCK_EXT = 1000066009;
const VK_FORMAT_ASTC_10x8_SFLOAT_BLOCK_EXT = 1000066010;
const VK_FORMAT_ASTC_10x10_SFLOAT_BLOCK_EXT = 1000066011;
const VK_FORMAT_ASTC_12x10_SFLOAT_BLOCK_EXT = 1000066012;
const VK_FORMAT_ASTC_12x12_SFLOAT_BLOCK_EXT = 1000066013;
const VK_FORMAT_A4R4G4B4_UNORM_PACK16_EXT = 1000340000;
const VK_FORMAT_A4B4G4R4_UNORM_PACK16_EXT = 1000340001;

/**
 * Represents an unpacked KTX 2.0 texture container. Data for individual mip levels are stored in
 * the `.levels` array, typically compressed in Basis Universal formats. Additional properties
 * provide metadata required to process, transcode, and upload these textures.
 */
class KTX2Container {
  constructor() {
    /**
     * Specifies the image format using Vulkan VkFormat enum values. When using Basis Universal
     * texture formats, `vkFormat` must be VK_FORMAT_UNDEFINED.
     */
    this.vkFormat = VK_FORMAT_UNDEFINED;
    /**
     * Size of the data type in bytes used to upload the data to a graphics API. When `vkFormat` is
     * VK_FORMAT_UNDEFINED, `typeSize` must be 1.
     */
    this.typeSize = 1;
    /** Width of the texture image for level 0, in pixels. */
    this.pixelWidth = 0;
    /** Height of the texture image for level 0, in pixels. */
    this.pixelHeight = 0;
    /** Depth of the texture image for level 0, in pixels (3D textures only). */
    this.pixelDepth = 0;
    /** Number of array elements (array textures only). */
    this.layerCount = 0;
    /**
     * Number of cubemap faces. For cubemaps and cubemap arrays, `faceCount` must be 6. For all
     * other textures, `faceCount` must be 1. Cubemap faces are stored in +X, -X, +Y, -Y, +Z, -Z
     * order.
     */
    this.faceCount = 1;
    /** Indicates which supercompression scheme has been applied to mip level images, if any. */
    this.supercompressionScheme = KHR_SUPERCOMPRESSION_NONE;
    /** Mip levels, ordered largest (original) to smallest (~1px). */
    this.levels = [];
    /** Data Format Descriptor. */
    this.dataFormatDescriptor = [{
      vendorId: KHR_DF_VENDORID_KHRONOS,
      descriptorType: KHR_DF_KHR_DESCRIPTORTYPE_BASICFORMAT,
      descriptorBlockSize: 0,
      versionNumber: KHR_DF_VERSION,
      colorModel: KHR_DF_MODEL_UNSPECIFIED,
      colorPrimaries: KHR_DF_PRIMARIES_BT709,
      transferFunction: KHR_DF_TRANSFER_SRGB,
      flags: KHR_DF_FLAG_ALPHA_STRAIGHT,
      texelBlockDimension: [0, 0, 0, 0],
      bytesPlane: [0, 0, 0, 0, 0, 0, 0, 0],
      samples: []
    }];
    /** Key/Value Data. */
    this.keyValue = {};
    /** Supercompression Global Data. */
    this.globalData = null;
  }
}

class BufferReader {
  constructor(data, byteOffset, byteLength, littleEndian) {
    this._dataView = void 0;
    this._littleEndian = void 0;
    this._offset = void 0;
    this._dataView = new DataView(data.buffer, data.byteOffset + byteOffset, byteLength);
    this._littleEndian = littleEndian;
    this._offset = 0;
  }
  _nextUint8() {
    const value = this._dataView.getUint8(this._offset);
    this._offset += 1;
    return value;
  }
  _nextUint16() {
    const value = this._dataView.getUint16(this._offset, this._littleEndian);
    this._offset += 2;
    return value;
  }
  _nextUint32() {
    const value = this._dataView.getUint32(this._offset, this._littleEndian);
    this._offset += 4;
    return value;
  }
  _nextUint64() {
    const left = this._dataView.getUint32(this._offset, this._littleEndian);
    const right = this._dataView.getUint32(this._offset + 4, this._littleEndian);
    // TODO(cleanup): Just test this...
    // const value = this._littleEndian ? left + (2 ** 32 * right) : (2 ** 32 * left) + right;
    const value = left + 2 ** 32 * right;
    this._offset += 8;
    return value;
  }
  _nextInt32() {
    const value = this._dataView.getInt32(this._offset, this._littleEndian);
    this._offset += 4;
    return value;
  }
  _nextUint8Array(len) {
    const value = new Uint8Array(this._dataView.buffer, this._dataView.byteOffset + this._offset, len);
    this._offset += len;
    return value;
  }
  _skip(bytes) {
    this._offset += bytes;
    return this;
  }
  _scan(maxByteLength, term = 0x00) {
    const byteOffset = this._offset;
    let byteLength = 0;
    while (this._dataView.getUint8(this._offset) !== term && byteLength < maxByteLength) {
      byteLength++;
      this._offset++;
    }
    if (byteLength < maxByteLength) this._offset++;
    return new Uint8Array(this._dataView.buffer, this._dataView.byteOffset + byteOffset, byteLength);
  }
}

///////////////////////////////////////////////////
// Common.
///////////////////////////////////////////////////
const KTX_WRITER = `KTX-Parse v${"0.7.1"}`;
const NUL = new Uint8Array([0x00]);
///////////////////////////////////////////////////
// KTX2 Header.
///////////////////////////////////////////////////
const KTX2_ID = [
// '´', 'K', 'T', 'X', '2', '0', 'ª', '\r', '\n', '\x1A', '\n'
0xab, 0x4b, 0x54, 0x58, 0x20, 0x32, 0x30, 0xbb, 0x0d, 0x0a, 0x1a, 0x0a];
const HEADER_BYTE_LENGTH = 68; // 13 * 4 + 2 * 8

/** Encodes text to an ArrayBuffer. */
function encodeText(text) {
  return new TextEncoder().encode(text);
}
/** Decodes an ArrayBuffer to text. */
function decodeText(buffer) {
  return new TextDecoder().decode(buffer);
}
/** Concatenates N ArrayBuffers. */
function concat(buffers) {
  let totalByteLength = 0;
  for (const buffer of buffers) {
    totalByteLength += buffer.byteLength;
  }
  const result = new Uint8Array(totalByteLength);
  let byteOffset = 0;
  for (const buffer of buffers) {
    result.set(new Uint8Array(buffer), byteOffset);
    byteOffset += buffer.byteLength;
  }
  return result;
}
/** Returns the least common multiple (LCM) for two positive integers. */
function leastCommonMultiple(a, b) {
  const max = Math.max(a, b);
  const min = Math.min(a, b);
  let lcm = max;
  while (lcm % min !== 0) {
    lcm += max;
  }
  return lcm;
}
/**
 * Returns amount of padding, in bytes, required to pad a value V to N-byte
 * boundaries. Both V and N must be positive integers.
 */
function getPadding(v, n = 4) {
  return Math.ceil(v / n) * n - v;
}
/** Returns byte length per texel block. */
function getBlockByteLength(container) {
  return container.levels[0].levelData.byteLength / getBlockCount(container, 0);
}
/**
 * Returns total number of blocks for given level. For VK_FORMAT_UNDEFINED, DFD is required.
 *
 * References:
 * - https://github.khronos.org/KTX-Specification/ktxspec.v2.html#levelImages
 */
function getBlockCount(container, levelIndex) {
  let blockCount = 1;
  const pixelDimensions = [container.pixelWidth, container.pixelHeight, container.pixelDepth];
  const blockDimensions = getBlockDimensions(container);
  for (let i = 0; i < 3; i++) {
    if (pixelDimensions[i] > 0) {
      const dimBlockCount = Math.ceil(Math.floor(pixelDimensions[i] * Math.pow(2, -levelIndex)) / blockDimensions[i]);
      blockCount *= Math.max(1, dimBlockCount);
    }
  }
  if (container.layerCount > 0) {
    blockCount *= container.layerCount;
  }
  if (container.faceCount > 0) {
    blockCount *= container.faceCount;
  }
  return blockCount;
}
/**
 * Given a KTX2 container, returns block dimensions as [width, height, depth]. Requires valid DFD.
 */
function getBlockDimensions(container) {
  const [x, y, z] = container.dataFormatDescriptor[0].texelBlockDimension;
  return [x + 1, y + 1, z + 1];
}

/**
 * Parses a KTX 2.0 file, returning an unpacked {@link KTX2Container} instance with all associated
 * data. The container's mip levels and other binary data are pointers into the original file, not
 * copies, so the original file should not be overwritten after reading.
 *
 * @param data Bytes of KTX 2.0 file, as Uint8Array or Buffer.
 */
function read(data) {
  ///////////////////////////////////////////////////
  // KTX 2.0 Identifier.
  ///////////////////////////////////////////////////
  const id = new Uint8Array(data.buffer, data.byteOffset, KTX2_ID.length);
  if (id[0] !== KTX2_ID[0] ||
  // '´'
  id[1] !== KTX2_ID[1] ||
  // 'K'
  id[2] !== KTX2_ID[2] ||
  // 'T'
  id[3] !== KTX2_ID[3] ||
  // 'X'
  id[4] !== KTX2_ID[4] ||
  // ' '
  id[5] !== KTX2_ID[5] ||
  // '2'
  id[6] !== KTX2_ID[6] ||
  // '0'
  id[7] !== KTX2_ID[7] ||
  // 'ª'
  id[8] !== KTX2_ID[8] ||
  // '\r'
  id[9] !== KTX2_ID[9] ||
  // '\n'
  id[10] !== KTX2_ID[10] ||
  // '\x1A'
  id[11] !== KTX2_ID[11] // '\n'
  ) {
    throw new Error('Missing KTX 2.0 identifier.');
  }
  const container = new KTX2Container();
  ///////////////////////////////////////////////////
  // Header.
  ///////////////////////////////////////////////////
  const headerByteLength = 17 * Uint32Array.BYTES_PER_ELEMENT;
  const headerReader = new BufferReader(data, KTX2_ID.length, headerByteLength, true);
  container.vkFormat = headerReader._nextUint32();
  container.typeSize = headerReader._nextUint32();
  container.pixelWidth = headerReader._nextUint32();
  container.pixelHeight = headerReader._nextUint32();
  container.pixelDepth = headerReader._nextUint32();
  container.layerCount = headerReader._nextUint32();
  container.faceCount = headerReader._nextUint32();
  const levelCount = headerReader._nextUint32();
  container.supercompressionScheme = headerReader._nextUint32();
  const dfdByteOffset = headerReader._nextUint32();
  const dfdByteLength = headerReader._nextUint32();
  const kvdByteOffset = headerReader._nextUint32();
  const kvdByteLength = headerReader._nextUint32();
  const sgdByteOffset = headerReader._nextUint64();
  const sgdByteLength = headerReader._nextUint64();
  ///////////////////////////////////////////////////
  // Level Index.
  ///////////////////////////////////////////////////
  const levelByteLength = levelCount * 3 * 8;
  const levelReader = new BufferReader(data, KTX2_ID.length + headerByteLength, levelByteLength, true);
  for (let i = 0; i < levelCount; i++) {
    container.levels.push({
      levelData: new Uint8Array(data.buffer, data.byteOffset + levelReader._nextUint64(), levelReader._nextUint64()),
      uncompressedByteLength: levelReader._nextUint64()
    });
  }
  ///////////////////////////////////////////////////
  // Data Format Descriptor (DFD).
  ///////////////////////////////////////////////////
  const dfdReader = new BufferReader(data, dfdByteOffset, dfdByteLength, true);
  const dfd = {
    vendorId: dfdReader._skip(4 /* totalSize */)._nextUint16(),
    descriptorType: dfdReader._nextUint16(),
    versionNumber: dfdReader._nextUint16(),
    descriptorBlockSize: dfdReader._nextUint16(),
    colorModel: dfdReader._nextUint8(),
    colorPrimaries: dfdReader._nextUint8(),
    transferFunction: dfdReader._nextUint8(),
    flags: dfdReader._nextUint8(),
    texelBlockDimension: [dfdReader._nextUint8(), dfdReader._nextUint8(), dfdReader._nextUint8(), dfdReader._nextUint8()],
    bytesPlane: [dfdReader._nextUint8(), dfdReader._nextUint8(), dfdReader._nextUint8(), dfdReader._nextUint8(), dfdReader._nextUint8(), dfdReader._nextUint8(), dfdReader._nextUint8(), dfdReader._nextUint8()],
    samples: []
  };
  const sampleStart = 6;
  const sampleWords = 4;
  const numSamples = (dfd.descriptorBlockSize / 4 - sampleStart) / sampleWords;
  for (let i = 0; i < numSamples; i++) {
    const sample = {
      bitOffset: dfdReader._nextUint16(),
      bitLength: dfdReader._nextUint8(),
      channelType: dfdReader._nextUint8(),
      samplePosition: [dfdReader._nextUint8(), dfdReader._nextUint8(), dfdReader._nextUint8(), dfdReader._nextUint8()],
      sampleLower: -Infinity,
      sampleUpper: Infinity
    };
    if (sample.channelType & KHR_DF_SAMPLE_DATATYPE_SIGNED) {
      sample.sampleLower = dfdReader._nextInt32();
      sample.sampleUpper = dfdReader._nextInt32();
    } else {
      sample.sampleLower = dfdReader._nextUint32();
      sample.sampleUpper = dfdReader._nextUint32();
    }
    dfd.samples[i] = sample;
  }
  container.dataFormatDescriptor.length = 0;
  container.dataFormatDescriptor.push(dfd);
  ///////////////////////////////////////////////////
  // Key/Value Data (KVD).
  ///////////////////////////////////////////////////
  const kvdReader = new BufferReader(data, kvdByteOffset, kvdByteLength, true);
  while (kvdReader._offset < kvdByteLength) {
    const keyValueByteLength = kvdReader._nextUint32();
    const keyData = kvdReader._scan(keyValueByteLength);
    const key = decodeText(keyData);
    container.keyValue[key] = kvdReader._nextUint8Array(keyValueByteLength - keyData.byteLength - 1);
    if (key.match(/^ktx/i)) {
      const text = decodeText(container.keyValue[key]);
      container.keyValue[key] = text.substring(0, text.lastIndexOf('\x00'));
    }
    const kvPadding = keyValueByteLength % 4 ? 4 - keyValueByteLength % 4 : 0; // align(4)
    // 4-byte alignment.
    kvdReader._skip(kvPadding);
  }
  ///////////////////////////////////////////////////
  // Supercompression Global Data (SGD).
  ///////////////////////////////////////////////////
  if (sgdByteLength <= 0) return container;
  const sgdReader = new BufferReader(data, sgdByteOffset, sgdByteLength, true);
  const endpointCount = sgdReader._nextUint16();
  const selectorCount = sgdReader._nextUint16();
  const endpointsByteLength = sgdReader._nextUint32();
  const selectorsByteLength = sgdReader._nextUint32();
  const tablesByteLength = sgdReader._nextUint32();
  const extendedByteLength = sgdReader._nextUint32();
  const imageDescs = [];
  for (let i = 0; i < levelCount; i++) {
    imageDescs.push({
      imageFlags: sgdReader._nextUint32(),
      rgbSliceByteOffset: sgdReader._nextUint32(),
      rgbSliceByteLength: sgdReader._nextUint32(),
      alphaSliceByteOffset: sgdReader._nextUint32(),
      alphaSliceByteLength: sgdReader._nextUint32()
    });
  }
  const endpointsByteOffset = sgdByteOffset + sgdReader._offset;
  const selectorsByteOffset = endpointsByteOffset + endpointsByteLength;
  const tablesByteOffset = selectorsByteOffset + selectorsByteLength;
  const extendedByteOffset = tablesByteOffset + tablesByteLength;
  const endpointsData = new Uint8Array(data.buffer, data.byteOffset + endpointsByteOffset, endpointsByteLength);
  const selectorsData = new Uint8Array(data.buffer, data.byteOffset + selectorsByteOffset, selectorsByteLength);
  const tablesData = new Uint8Array(data.buffer, data.byteOffset + tablesByteOffset, tablesByteLength);
  const extendedData = new Uint8Array(data.buffer, data.byteOffset + extendedByteOffset, extendedByteLength);
  container.globalData = {
    endpointCount,
    selectorCount,
    imageDescs,
    endpointsData,
    selectorsData,
    tablesData,
    extendedData
  };
  return container;
}

function _extends() {
  _extends = Object.assign ? Object.assign.bind() : function (target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i];
      for (var key in source) {
        if (Object.prototype.hasOwnProperty.call(source, key)) {
          target[key] = source[key];
        }
      }
    }
    return target;
  };
  return _extends.apply(this, arguments);
}

const DEFAULT_OPTIONS = {
  keepWriter: false
};
/**
 * Serializes a {@link KTX2Container} instance to a KTX 2.0 file. Mip levels and other binary data
 * are copied into the resulting Uint8Array, so the original container can safely be edited or
 * destroyed after it is serialized.
 *
 * Options:
 * - keepWriter: If true, 'KTXWriter' key/value field is written as provided by the container.
 * 		Otherwise, a string for the current ktx-parse version is generated. Default: false.
 *
 * @param container
 * @param options
 */
function write(container, options = {}) {
  options = _extends({}, DEFAULT_OPTIONS, options);
  ///////////////////////////////////////////////////
  // Supercompression Global Data (SGD).
  ///////////////////////////////////////////////////
  let sgdBuffer = new ArrayBuffer(0);
  if (container.globalData) {
    const sgdHeaderBuffer = new ArrayBuffer(20 + container.globalData.imageDescs.length * 5 * 4);
    const sgdHeaderView = new DataView(sgdHeaderBuffer);
    sgdHeaderView.setUint16(0, container.globalData.endpointCount, true);
    sgdHeaderView.setUint16(2, container.globalData.selectorCount, true);
    sgdHeaderView.setUint32(4, container.globalData.endpointsData.byteLength, true);
    sgdHeaderView.setUint32(8, container.globalData.selectorsData.byteLength, true);
    sgdHeaderView.setUint32(12, container.globalData.tablesData.byteLength, true);
    sgdHeaderView.setUint32(16, container.globalData.extendedData.byteLength, true);
    for (let i = 0; i < container.globalData.imageDescs.length; i++) {
      const imageDesc = container.globalData.imageDescs[i];
      sgdHeaderView.setUint32(20 + i * 5 * 4 + 0, imageDesc.imageFlags, true);
      sgdHeaderView.setUint32(20 + i * 5 * 4 + 4, imageDesc.rgbSliceByteOffset, true);
      sgdHeaderView.setUint32(20 + i * 5 * 4 + 8, imageDesc.rgbSliceByteLength, true);
      sgdHeaderView.setUint32(20 + i * 5 * 4 + 12, imageDesc.alphaSliceByteOffset, true);
      sgdHeaderView.setUint32(20 + i * 5 * 4 + 16, imageDesc.alphaSliceByteLength, true);
    }
    sgdBuffer = concat([sgdHeaderBuffer, container.globalData.endpointsData, container.globalData.selectorsData, container.globalData.tablesData, container.globalData.extendedData]);
  }
  ///////////////////////////////////////////////////
  // Key/Value Data (KVD).
  ///////////////////////////////////////////////////
  const keyValueData = [];
  let keyValue = container.keyValue;
  if (!options.keepWriter) {
    keyValue = _extends({}, container.keyValue, {
      KTXwriter: KTX_WRITER
    });
  }
  for (const key in keyValue) {
    const value = keyValue[key];
    const keyData = encodeText(key);
    const valueData = typeof value === 'string' ? concat([encodeText(value), NUL]) : value;
    const kvByteLength = keyData.byteLength + 1 + valueData.byteLength;
    const kvPadding = getPadding(kvByteLength, 4); // align(4)
    keyValueData.push(concat([new Uint32Array([kvByteLength]), keyData, NUL, valueData, new Uint8Array(kvPadding).fill(0x00) // align(4)
    ]));
  }
  const kvdBuffer = concat(keyValueData);
  ///////////////////////////////////////////////////
  // Data Format Descriptor (DFD).
  ///////////////////////////////////////////////////
  if (container.dataFormatDescriptor.length !== 1 || container.dataFormatDescriptor[0].descriptorType !== KHR_DF_KHR_DESCRIPTORTYPE_BASICFORMAT) {
    throw new Error('Only BASICFORMAT Data Format Descriptor output supported.');
  }
  const dfd = container.dataFormatDescriptor[0];
  const dfdBuffer = new ArrayBuffer(28 + dfd.samples.length * 16);
  const dfdView = new DataView(dfdBuffer);
  const descriptorBlockSize = 24 + dfd.samples.length * 16;
  dfdView.setUint32(0, dfdBuffer.byteLength, true);
  dfdView.setUint16(4, dfd.vendorId, true);
  dfdView.setUint16(6, dfd.descriptorType, true);
  dfdView.setUint16(8, dfd.versionNumber, true);
  dfdView.setUint16(10, descriptorBlockSize, true);
  dfdView.setUint8(12, dfd.colorModel);
  dfdView.setUint8(13, dfd.colorPrimaries);
  dfdView.setUint8(14, dfd.transferFunction);
  dfdView.setUint8(15, dfd.flags);
  if (!Array.isArray(dfd.texelBlockDimension)) {
    throw new Error('texelBlockDimension is now an array. For dimensionality `d`, set `d - 1`.');
  }
  dfdView.setUint8(16, dfd.texelBlockDimension[0]);
  dfdView.setUint8(17, dfd.texelBlockDimension[1]);
  dfdView.setUint8(18, dfd.texelBlockDimension[2]);
  dfdView.setUint8(19, dfd.texelBlockDimension[3]);
  for (let i = 0; i < 8; i++) dfdView.setUint8(20 + i, dfd.bytesPlane[i]);
  for (let i = 0; i < dfd.samples.length; i++) {
    const sample = dfd.samples[i];
    const sampleByteOffset = 28 + i * 16;
    if (sample.channelID) {
      throw new Error('channelID has been renamed to channelType.');
    }
    dfdView.setUint16(sampleByteOffset + 0, sample.bitOffset, true);
    dfdView.setUint8(sampleByteOffset + 2, sample.bitLength);
    dfdView.setUint8(sampleByteOffset + 3, sample.channelType);
    dfdView.setUint8(sampleByteOffset + 4, sample.samplePosition[0]);
    dfdView.setUint8(sampleByteOffset + 5, sample.samplePosition[1]);
    dfdView.setUint8(sampleByteOffset + 6, sample.samplePosition[2]);
    dfdView.setUint8(sampleByteOffset + 7, sample.samplePosition[3]);
    if (sample.channelType & KHR_DF_SAMPLE_DATATYPE_SIGNED) {
      dfdView.setInt32(sampleByteOffset + 8, sample.sampleLower, true);
      dfdView.setInt32(sampleByteOffset + 12, sample.sampleUpper, true);
    } else {
      dfdView.setUint32(sampleByteOffset + 8, sample.sampleLower, true);
      dfdView.setUint32(sampleByteOffset + 12, sample.sampleUpper, true);
    }
  }
  ///////////////////////////////////////////////////
  // Data alignment.
  ///////////////////////////////////////////////////
  const dfdByteOffset = KTX2_ID.length + HEADER_BYTE_LENGTH + container.levels.length * 3 * 8;
  const kvdByteOffset = dfdByteOffset + dfdBuffer.byteLength;
  let sgdByteOffset = sgdBuffer.byteLength > 0 ? kvdByteOffset + kvdBuffer.byteLength : 0;
  if (sgdByteOffset % 8) sgdByteOffset += 8 - sgdByteOffset % 8; // align(8)
  ///////////////////////////////////////////////////
  // Level Index.
  ///////////////////////////////////////////////////
  const levelData = [];
  const levelIndex = new DataView(new ArrayBuffer(container.levels.length * 3 * 8));
  const levelDataByteOffsets = new Uint32Array(container.levels.length);
  let levelAlign = 0;
  if (container.supercompressionScheme === KHR_SUPERCOMPRESSION_NONE) {
    levelAlign = leastCommonMultiple(getBlockByteLength(container), 4);
  }
  // Level data is ordered small → large.
  let levelDataByteOffset = (sgdByteOffset || kvdByteOffset + kvdBuffer.byteLength) + sgdBuffer.byteLength;
  for (let i = container.levels.length - 1; i >= 0; i--) {
    // Level padding.
    if (levelDataByteOffset % levelAlign) {
      const paddingBytes = getPadding(levelDataByteOffset, levelAlign);
      levelData.push(new Uint8Array(paddingBytes));
      levelDataByteOffset += paddingBytes;
    }
    // Level data.
    const level = container.levels[i];
    levelData.push(level.levelData);
    levelDataByteOffsets[i] = levelDataByteOffset;
    levelDataByteOffset += level.levelData.byteLength;
  }
  // Level index is ordered large → small.
  for (let i = 0; i < container.levels.length; i++) {
    const level = container.levels[i];
    levelIndex.setBigUint64(i * 24 + 0, BigInt(levelDataByteOffsets[i]), true);
    levelIndex.setBigUint64(i * 24 + 8, BigInt(level.levelData.byteLength), true);
    levelIndex.setBigUint64(i * 24 + 16, BigInt(level.uncompressedByteLength), true);
  }
  ///////////////////////////////////////////////////
  // Header.
  ///////////////////////////////////////////////////
  const headerBuffer = new ArrayBuffer(HEADER_BYTE_LENGTH);
  const headerView = new DataView(headerBuffer);
  headerView.setUint32(0, container.vkFormat, true);
  headerView.setUint32(4, container.typeSize, true);
  headerView.setUint32(8, container.pixelWidth, true);
  headerView.setUint32(12, container.pixelHeight, true);
  headerView.setUint32(16, container.pixelDepth, true);
  headerView.setUint32(20, container.layerCount, true);
  headerView.setUint32(24, container.faceCount, true);
  headerView.setUint32(28, container.levels.length, true);
  headerView.setUint32(32, container.supercompressionScheme, true);
  headerView.setUint32(36, dfdByteOffset, true);
  headerView.setUint32(40, dfdBuffer.byteLength, true);
  headerView.setUint32(44, kvdByteOffset, true);
  headerView.setUint32(48, kvdBuffer.byteLength, true);
  headerView.setBigUint64(52, BigInt(sgdBuffer.byteLength > 0 ? sgdByteOffset : 0), true);
  headerView.setBigUint64(60, BigInt(sgdBuffer.byteLength), true);
  ///////////////////////////////////////////////////
  // Compose.
  ///////////////////////////////////////////////////
  return new Uint8Array(concat([new Uint8Array(KTX2_ID).buffer, headerBuffer, levelIndex.buffer, dfdBuffer, kvdBuffer, sgdByteOffset > 0 ? new ArrayBuffer(sgdByteOffset - (kvdByteOffset + kvdBuffer.byteLength)) // align(8)
  : new ArrayBuffer(0), sgdBuffer, ...levelData]));
}

export { KHR_DF_CHANNEL_RGBSDA_ALPHA, KHR_DF_CHANNEL_RGBSDA_BLUE, KHR_DF_CHANNEL_RGBSDA_DEPTH, KHR_DF_CHANNEL_RGBSDA_GREEN, KHR_DF_CHANNEL_RGBSDA_RED, KHR_DF_CHANNEL_RGBSDA_STENCIL, KHR_DF_FLAG_ALPHA_PREMULTIPLIED, KHR_DF_FLAG_ALPHA_STRAIGHT, KHR_DF_KHR_DESCRIPTORTYPE_BASICFORMAT, KHR_DF_MODEL_ASTC, KHR_DF_MODEL_ETC1, KHR_DF_MODEL_ETC1S, KHR_DF_MODEL_ETC2, KHR_DF_MODEL_RGBSDA, KHR_DF_MODEL_UASTC, KHR_DF_MODEL_UNSPECIFIED, KHR_DF_PRIMARIES_ACES, KHR_DF_PRIMARIES_ACESCC, KHR_DF_PRIMARIES_ADOBERGB, KHR_DF_PRIMARIES_BT2020, KHR_DF_PRIMARIES_BT601_EBU, KHR_DF_PRIMARIES_BT601_SMPTE, KHR_DF_PRIMARIES_BT709, KHR_DF_PRIMARIES_CIEXYZ, KHR_DF_PRIMARIES_DISPLAYP3, KHR_DF_PRIMARIES_NTSC1953, KHR_DF_PRIMARIES_PAL525, KHR_DF_PRIMARIES_UNSPECIFIED, KHR_DF_SAMPLE_DATATYPE_EXPONENT, KHR_DF_SAMPLE_DATATYPE_FLOAT, KHR_DF_SAMPLE_DATATYPE_LINEAR, KHR_DF_SAMPLE_DATATYPE_SIGNED, KHR_DF_TRANSFER_ACESCC, KHR_DF_TRANSFER_ACESCCT, KHR_DF_TRANSFER_ADOBERGB, KHR_DF_TRANSFER_BT1886, KHR_DF_TRANSFER_DCIP3, KHR_DF_TRANSFER_HLG_EOTF, KHR_DF_TRANSFER_HLG_OETF, KHR_DF_TRANSFER_ITU, KHR_DF_TRANSFER_LINEAR, KHR_DF_TRANSFER_NTSC, KHR_DF_TRANSFER_PAL625_EOTF, KHR_DF_TRANSFER_PAL_OETF, KHR_DF_TRANSFER_PQ_EOTF, KHR_DF_TRANSFER_PQ_OETF, KHR_DF_TRANSFER_SLOG, KHR_DF_TRANSFER_SLOG2, KHR_DF_TRANSFER_SRGB, KHR_DF_TRANSFER_ST240, KHR_DF_TRANSFER_UNSPECIFIED, KHR_DF_VENDORID_KHRONOS, KHR_DF_VERSION, KHR_SUPERCOMPRESSION_BASISLZ, KHR_SUPERCOMPRESSION_NONE, KHR_SUPERCOMPRESSION_ZLIB, KHR_SUPERCOMPRESSION_ZSTD, KTX2Container, VK_FORMAT_A1R5G5B5_UNORM_PACK16, VK_FORMAT_A2B10G10R10_SINT_PACK32, VK_FORMAT_A2B10G10R10_SNORM_PACK32, VK_FORMAT_A2B10G10R10_UINT_PACK32, VK_FORMAT_A2B10G10R10_UNORM_PACK32, VK_FORMAT_A2R10G10B10_SINT_PACK32, VK_FORMAT_A2R10G10B10_SNORM_PACK32, VK_FORMAT_A2R10G10B10_UINT_PACK32, VK_FORMAT_A2R10G10B10_UNORM_PACK32, VK_FORMAT_A4B4G4R4_UNORM_PACK16_EXT, VK_FORMAT_A4R4G4B4_UNORM_PACK16_EXT, VK_FORMAT_ASTC_10x10_SFLOAT_BLOCK_EXT, VK_FORMAT_ASTC_10x10_SRGB_BLOCK, VK_FORMAT_ASTC_10x10_UNORM_BLOCK, VK_FORMAT_ASTC_10x5_SFLOAT_BLOCK_EXT, VK_FORMAT_ASTC_10x5_SRGB_BLOCK, VK_FORMAT_ASTC_10x5_UNORM_BLOCK, VK_FORMAT_ASTC_10x6_SFLOAT_BLOCK_EXT, VK_FORMAT_ASTC_10x6_SRGB_BLOCK, VK_FORMAT_ASTC_10x6_UNORM_BLOCK, VK_FORMAT_ASTC_10x8_SFLOAT_BLOCK_EXT, VK_FORMAT_ASTC_10x8_SRGB_BLOCK, VK_FORMAT_ASTC_10x8_UNORM_BLOCK, VK_FORMAT_ASTC_12x10_SFLOAT_BLOCK_EXT, VK_FORMAT_ASTC_12x10_SRGB_BLOCK, VK_FORMAT_ASTC_12x10_UNORM_BLOCK, VK_FORMAT_ASTC_12x12_SFLOAT_BLOCK_EXT, VK_FORMAT_ASTC_12x12_SRGB_BLOCK, VK_FORMAT_ASTC_12x12_UNORM_BLOCK, VK_FORMAT_ASTC_4x4_SFLOAT_BLOCK_EXT, VK_FORMAT_ASTC_4x4_SRGB_BLOCK, VK_FORMAT_ASTC_4x4_UNORM_BLOCK, VK_FORMAT_ASTC_5x4_SFLOAT_BLOCK_EXT, VK_FORMAT_ASTC_5x4_SRGB_BLOCK, VK_FORMAT_ASTC_5x4_UNORM_BLOCK, VK_FORMAT_ASTC_5x5_SFLOAT_BLOCK_EXT, VK_FORMAT_ASTC_5x5_SRGB_BLOCK, VK_FORMAT_ASTC_5x5_UNORM_BLOCK, VK_FORMAT_ASTC_6x5_SFLOAT_BLOCK_EXT, VK_FORMAT_ASTC_6x5_SRGB_BLOCK, VK_FORMAT_ASTC_6x5_UNORM_BLOCK, VK_FORMAT_ASTC_6x6_SFLOAT_BLOCK_EXT, VK_FORMAT_ASTC_6x6_SRGB_BLOCK, VK_FORMAT_ASTC_6x6_UNORM_BLOCK, VK_FORMAT_ASTC_8x5_SFLOAT_BLOCK_EXT, VK_FORMAT_ASTC_8x5_SRGB_BLOCK, VK_FORMAT_ASTC_8x5_UNORM_BLOCK, VK_FORMAT_ASTC_8x6_SFLOAT_BLOCK_EXT, VK_FORMAT_ASTC_8x6_SRGB_BLOCK, VK_FORMAT_ASTC_8x6_UNORM_BLOCK, VK_FORMAT_ASTC_8x8_SFLOAT_BLOCK_EXT, VK_FORMAT_ASTC_8x8_SRGB_BLOCK, VK_FORMAT_ASTC_8x8_UNORM_BLOCK, VK_FORMAT_B10G11R11_UFLOAT_PACK32, VK_FORMAT_B10X6G10X6R10X6G10X6_422_UNORM_4PACK16, VK_FORMAT_B12X4G12X4R12X4G12X4_422_UNORM_4PACK16, VK_FORMAT_B4G4R4A4_UNORM_PACK16, VK_FORMAT_B5G5R5A1_UNORM_PACK16, VK_FORMAT_B5G6R5_UNORM_PACK16, VK_FORMAT_B8G8R8A8_SINT, VK_FORMAT_B8G8R8A8_SNORM, VK_FORMAT_B8G8R8A8_SRGB, VK_FORMAT_B8G8R8A8_UINT, VK_FORMAT_B8G8R8A8_UNORM, VK_FORMAT_B8G8R8_SINT, VK_FORMAT_B8G8R8_SNORM, VK_FORMAT_B8G8R8_SRGB, VK_FORMAT_B8G8R8_UINT, VK_FORMAT_B8G8R8_UNORM, VK_FORMAT_BC1_RGBA_SRGB_BLOCK, VK_FORMAT_BC1_RGBA_UNORM_BLOCK, VK_FORMAT_BC1_RGB_SRGB_BLOCK, VK_FORMAT_BC1_RGB_UNORM_BLOCK, VK_FORMAT_BC2_SRGB_BLOCK, VK_FORMAT_BC2_UNORM_BLOCK, VK_FORMAT_BC3_SRGB_BLOCK, VK_FORMAT_BC3_UNORM_BLOCK, VK_FORMAT_BC4_SNORM_BLOCK, VK_FORMAT_BC4_UNORM_BLOCK, VK_FORMAT_BC5_SNORM_BLOCK, VK_FORMAT_BC5_UNORM_BLOCK, VK_FORMAT_BC6H_SFLOAT_BLOCK, VK_FORMAT_BC6H_UFLOAT_BLOCK, VK_FORMAT_BC7_SRGB_BLOCK, VK_FORMAT_BC7_UNORM_BLOCK, VK_FORMAT_D16_UNORM, VK_FORMAT_D16_UNORM_S8_UINT, VK_FORMAT_D24_UNORM_S8_UINT, VK_FORMAT_D32_SFLOAT, VK_FORMAT_D32_SFLOAT_S8_UINT, VK_FORMAT_E5B9G9R9_UFLOAT_PACK32, VK_FORMAT_EAC_R11G11_SNORM_BLOCK, VK_FORMAT_EAC_R11G11_UNORM_BLOCK, VK_FORMAT_EAC_R11_SNORM_BLOCK, VK_FORMAT_EAC_R11_UNORM_BLOCK, VK_FORMAT_ETC2_R8G8B8A1_SRGB_BLOCK, VK_FORMAT_ETC2_R8G8B8A1_UNORM_BLOCK, VK_FORMAT_ETC2_R8G8B8A8_SRGB_BLOCK, VK_FORMAT_ETC2_R8G8B8A8_UNORM_BLOCK, VK_FORMAT_ETC2_R8G8B8_SRGB_BLOCK, VK_FORMAT_ETC2_R8G8B8_UNORM_BLOCK, VK_FORMAT_G10X6B10X6G10X6R10X6_422_UNORM_4PACK16, VK_FORMAT_G12X4B12X4G12X4R12X4_422_UNORM_4PACK16, VK_FORMAT_PVRTC1_2BPP_SRGB_BLOCK_IMG, VK_FORMAT_PVRTC1_2BPP_UNORM_BLOCK_IMG, VK_FORMAT_PVRTC1_4BPP_SRGB_BLOCK_IMG, VK_FORMAT_PVRTC1_4BPP_UNORM_BLOCK_IMG, VK_FORMAT_PVRTC2_2BPP_SRGB_BLOCK_IMG, VK_FORMAT_PVRTC2_2BPP_UNORM_BLOCK_IMG, VK_FORMAT_PVRTC2_4BPP_SRGB_BLOCK_IMG, VK_FORMAT_PVRTC2_4BPP_UNORM_BLOCK_IMG, VK_FORMAT_R10X6G10X6B10X6A10X6_UNORM_4PACK16, VK_FORMAT_R10X6G10X6_UNORM_2PACK16, VK_FORMAT_R10X6_UNORM_PACK16, VK_FORMAT_R12X4G12X4B12X4A12X4_UNORM_4PACK16, VK_FORMAT_R12X4G12X4_UNORM_2PACK16, VK_FORMAT_R12X4_UNORM_PACK16, VK_FORMAT_R16G16B16A16_SFLOAT, VK_FORMAT_R16G16B16A16_SINT, VK_FORMAT_R16G16B16A16_SNORM, VK_FORMAT_R16G16B16A16_UINT, VK_FORMAT_R16G16B16A16_UNORM, VK_FORMAT_R16G16B16_SFLOAT, VK_FORMAT_R16G16B16_SINT, VK_FORMAT_R16G16B16_SNORM, VK_FORMAT_R16G16B16_UINT, VK_FORMAT_R16G16B16_UNORM, VK_FORMAT_R16G16_SFLOAT, VK_FORMAT_R16G16_SINT, VK_FORMAT_R16G16_SNORM, VK_FORMAT_R16G16_UINT, VK_FORMAT_R16G16_UNORM, VK_FORMAT_R16_SFLOAT, VK_FORMAT_R16_SINT, VK_FORMAT_R16_SNORM, VK_FORMAT_R16_UINT, VK_FORMAT_R16_UNORM, VK_FORMAT_R32G32B32A32_SFLOAT, VK_FORMAT_R32G32B32A32_SINT, VK_FORMAT_R32G32B32A32_UINT, VK_FORMAT_R32G32B32_SFLOAT, VK_FORMAT_R32G32B32_SINT, VK_FORMAT_R32G32B32_UINT, VK_FORMAT_R32G32_SFLOAT, VK_FORMAT_R32G32_SINT, VK_FORMAT_R32G32_UINT, VK_FORMAT_R32_SFLOAT, VK_FORMAT_R32_SINT, VK_FORMAT_R32_UINT, VK_FORMAT_R4G4B4A4_UNORM_PACK16, VK_FORMAT_R4G4_UNORM_PACK8, VK_FORMAT_R5G5B5A1_UNORM_PACK16, VK_FORMAT_R5G6B5_UNORM_PACK16, VK_FORMAT_R64G64B64A64_SFLOAT, VK_FORMAT_R64G64B64A64_SINT, VK_FORMAT_R64G64B64A64_UINT, VK_FORMAT_R64G64B64_SFLOAT, VK_FORMAT_R64G64B64_SINT, VK_FORMAT_R64G64B64_UINT, VK_FORMAT_R64G64_SFLOAT, VK_FORMAT_R64G64_SINT, VK_FORMAT_R64G64_UINT, VK_FORMAT_R64_SFLOAT, VK_FORMAT_R64_SINT, VK_FORMAT_R64_UINT, VK_FORMAT_R8G8B8A8_SINT, VK_FORMAT_R8G8B8A8_SNORM, VK_FORMAT_R8G8B8A8_SRGB, VK_FORMAT_R8G8B8A8_UINT, VK_FORMAT_R8G8B8A8_UNORM, VK_FORMAT_R8G8B8_SINT, VK_FORMAT_R8G8B8_SNORM, VK_FORMAT_R8G8B8_SRGB, VK_FORMAT_R8G8B8_UINT, VK_FORMAT_R8G8B8_UNORM, VK_FORMAT_R8G8_SINT, VK_FORMAT_R8G8_SNORM, VK_FORMAT_R8G8_SRGB, VK_FORMAT_R8G8_UINT, VK_FORMAT_R8G8_UNORM, VK_FORMAT_R8_SINT, VK_FORMAT_R8_SNORM, VK_FORMAT_R8_SRGB, VK_FORMAT_R8_UINT, VK_FORMAT_R8_UNORM, VK_FORMAT_S8_UINT, VK_FORMAT_UNDEFINED, VK_FORMAT_X8_D24_UNORM_PACK32, read, write };
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