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{"version":3,"file":"KTX2Loader.cjs","sources":["../../src/loaders/KTX2Loader.js"],"sourcesContent":["/**\n * Loader for KTX 2.0 GPU Texture containers.\n *\n * KTX 2.0 is a container format for various GPU texture formats. The loader\n * supports Basis Universal GPU textures, which can be quickly transcoded to\n * a wide variety of GPU texture compression formats, as well as some\n * uncompressed DataTexture and Data3DTexture formats.\n *\n * References:\n * - KTX: http://github.khronos.org/KTX-Specification/\n * - DFD: https://www.khronos.org/registry/DataFormat/specs/1.3/dataformat.1.3.html#basicdescriptor\n */\n\nimport {\n CompressedTexture,\n DataTexture,\n FileLoader,\n FloatType,\n HalfFloatType,\n LinearFilter,\n LinearMipmapLinearFilter,\n Loader,\n RedFormat,\n RGB_ETC1_Format,\n RGB_ETC2_Format,\n RGB_PVRTC_4BPPV1_Format,\n RGB_S3TC_DXT1_Format,\n RGBA_ASTC_4x4_Format,\n RGBA_ASTC_6x6_Format,\n RGBA_BPTC_Format,\n RGBA_ETC2_EAC_Format,\n RGBA_PVRTC_4BPPV1_Format,\n RGBA_S3TC_DXT5_Format,\n RGBAFormat,\n RGFormat,\n UnsignedByteType,\n} from 'three'\nimport { WorkerPool } from '../utils/WorkerPool'\nimport {\n read,\n KHR_DF_FLAG_ALPHA_PREMULTIPLIED,\n KHR_DF_TRANSFER_SRGB,\n KHR_SUPERCOMPRESSION_NONE,\n KHR_SUPERCOMPRESSION_ZSTD,\n VK_FORMAT_UNDEFINED,\n VK_FORMAT_R16_SFLOAT,\n VK_FORMAT_R16G16_SFLOAT,\n VK_FORMAT_R16G16B16A16_SFLOAT,\n VK_FORMAT_R32_SFLOAT,\n VK_FORMAT_R32G32_SFLOAT,\n VK_FORMAT_R32G32B32A32_SFLOAT,\n VK_FORMAT_R8_SRGB,\n VK_FORMAT_R8_UNORM,\n VK_FORMAT_R8G8_SRGB,\n VK_FORMAT_R8G8_UNORM,\n VK_FORMAT_R8G8B8A8_SRGB,\n VK_FORMAT_R8G8B8A8_UNORM,\n VK_FORMAT_ASTC_6x6_SRGB_BLOCK,\n VK_FORMAT_ASTC_6x6_UNORM_BLOCK,\n KHR_DF_PRIMARIES_UNSPECIFIED,\n KHR_DF_PRIMARIES_BT709,\n KHR_DF_PRIMARIES_DISPLAYP3,\n} from '../libs/ktx-parse'\nimport { ZSTDDecoder } from '../libs/zstddec'\nimport { CompressedCubeTexture } from '../_polyfill/CompressedCubeTexture'\nimport { CompressedArrayTexture } from '../_polyfill/CompressedArrayTexture'\nimport { Data3DTexture } from '../_polyfill/Data3DTexture'\n\nconst LinearEncoding = 3000\nconst sRGBEncoding = 3001\n\nconst NoColorSpace = ''\nconst DisplayP3ColorSpace = 'display-p3'\nconst LinearDisplayP3ColorSpace = 'display-p3-linear'\nconst LinearSRGBColorSpace = 'srgb-linear'\nconst SRGBColorSpace = 'srgb'\n\nconst _taskCache = new WeakMap()\n\nlet _activeLoaders = 0\n\nlet _zstd\n\nconst KTX2Loader = /* @__PURE__ */ (() => {\n class KTX2Loader extends Loader {\n /* CONSTANTS */\n\n static BasisFormat = {\n ETC1S: 0,\n UASTC_4x4: 1,\n }\n\n static TranscoderFormat = {\n ETC1: 0,\n ETC2: 1,\n BC1: 2,\n BC3: 3,\n BC4: 4,\n BC5: 5,\n BC7_M6_OPAQUE_ONLY: 6,\n BC7_M5: 7,\n PVRTC1_4_RGB: 8,\n PVRTC1_4_RGBA: 9,\n ASTC_4x4: 10,\n ATC_RGB: 11,\n ATC_RGBA_INTERPOLATED_ALPHA: 12,\n RGBA32: 13,\n RGB565: 14,\n BGR565: 15,\n RGBA4444: 16,\n }\n\n static EngineFormat = {\n RGBAFormat: RGBAFormat,\n RGBA_ASTC_4x4_Format: RGBA_ASTC_4x4_Format,\n RGBA_BPTC_Format: RGBA_BPTC_Format,\n RGBA_ETC2_EAC_Format: RGBA_ETC2_EAC_Format,\n RGBA_PVRTC_4BPPV1_Format: RGBA_PVRTC_4BPPV1_Format,\n RGBA_S3TC_DXT5_Format: RGBA_S3TC_DXT5_Format,\n RGB_ETC1_Format: RGB_ETC1_Format,\n RGB_ETC2_Format: RGB_ETC2_Format,\n RGB_PVRTC_4BPPV1_Format: RGB_PVRTC_4BPPV1_Format,\n RGB_S3TC_DXT1_Format: RGB_S3TC_DXT1_Format,\n }\n\n /* WEB WORKER */\n\n static BasisWorker = function () {\n let config\n let transcoderPending\n let BasisModule\n\n /** @type KTX2Loader.EngineFormat */\n const EngineFormat = _EngineFormat\n /** @type KTX2Loader.TranscoderFormat */\n const TranscoderFormat = _TranscoderFormat\n /** @type KTX2Loader.BasisFormat */\n const BasisFormat = _BasisFormat\n\n self.addEventListener('message', function (e) {\n const message = e.data\n\n switch (message.type) {\n case 'init':\n config = message.config\
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