/* -*- tab-width: 4; -*- */ /* vi: set sw=2 ts=4 expandtab: */ /* * Copyright 2019-2020 The Khronos Group Inc. * SPDX-License-Identifier: Apache-2.0 */ /** * @internal * @file texture2.c * @~English * * @brief ktxTexture2 implementation. Support for KTX2 format. * * @author Mark Callow, www.edgewise-consulting.com */ #if defined(_WIN32) #define _CRT_SECURE_NO_WARNINGS #endif #include #include #include #include #include #include #include #include "dfdutils/dfd.h" #include "ktx.h" #include "ktxint.h" #include "filestream.h" #include "memstream.h" #include "texture2.h" #include "unused.h" // FIXME: Test this #define and put it in a header somewhere. //#define IS_BIG_ENDIAN (1 == *(unsigned char *)&(const int){0x01000000ul}) #define IS_BIG_ENDIAN 0 extern uint32_t vkFormatTypeSize(VkFormat format); struct ktxTexture_vtbl ktxTexture2_vtbl; struct ktxTexture_vtblInt ktxTexture2_vtblInt; #if !defined(BITFIELD_ORDER_FROM_MSB) // Most compilers, including all those tested so far, including clang, gcc // and msvc, order bitfields from the lsb so these struct declarations work. // Could this be because I've only tested on little-endian machines? // These are preferred as they are much easier to manually initialize // and verify. struct sampleType { uint32_t bitOffset: 16; uint32_t bitLength: 8; uint32_t channelType: 8; // Includes qualifiers uint32_t samplePosition0: 8; uint32_t samplePosition1: 8; uint32_t samplePosition2: 8; uint32_t samplePosition3: 8; uint32_t lower; uint32_t upper; }; struct BDFD { uint32_t vendorId: 17; uint32_t descriptorType: 15; uint32_t versionNumber: 16; uint32_t descriptorBlockSize: 16; uint32_t model: 8; uint32_t primaries: 8; uint32_t transfer: 8; uint32_t flags: 8; uint32_t texelBlockDimension0: 8; uint32_t texelBlockDimension1: 8; uint32_t texelBlockDimension2: 8; uint32_t texelBlockDimension3: 8; uint32_t bytesPlane0: 8; uint32_t bytesPlane1: 8; uint32_t bytesPlane2: 8; uint32_t bytesPlane3: 8; uint32_t bytesPlane4: 8; uint32_t bytesPlane5: 8; uint32_t bytesPlane6: 8; uint32_t bytesPlane7: 8; struct sampleType samples[6]; }; struct BDFD e5b9g9r9_ufloat_comparator = { .vendorId = 0, .descriptorType = 0, .versionNumber = 2, .descriptorBlockSize = sizeof(struct BDFD), .model = KHR_DF_MODEL_RGBSDA, .primaries = KHR_DF_PRIMARIES_BT709, .transfer = KHR_DF_TRANSFER_LINEAR, .flags = KHR_DF_FLAG_ALPHA_STRAIGHT, .texelBlockDimension0 = 0, .texelBlockDimension1 = 0, .texelBlockDimension2 = 0, .texelBlockDimension3 = 0, .bytesPlane0 = 4, .bytesPlane1 = 0, .bytesPlane2 = 0, .bytesPlane3 = 0, .bytesPlane4 = 0, .bytesPlane5 = 0, .bytesPlane6 = 0, .bytesPlane7 = 0, // gcc likes this way. It does not like, e.g., // .samples[0].bitOffset = 0, etc. which is accepted by both clang & msvc. // I find the standards docs impenetrable so I don't know which is correct. .samples[0] = { .bitOffset = 0, .bitLength = 8, .channelType = KHR_DF_CHANNEL_RGBSDA_RED, .samplePosition0 = 0, .samplePosition1 = 0, .samplePosition2 = 0, .samplePosition3 = 0, .lower = 0, .upper = 8448, }, .samples[1] = { .bitOffset = 27, .bitLength = 4, .channelType = KHR_DF_CHANNEL_RGBSDA_RED | KHR_DF_SAMPLE_DATATYPE_EXPONENT, .samplePosition0 = 0, .samplePosition1 = 0, .samplePosition2 = 0, .samplePosition3 = 0, .lower = 15, .upper = 31, }, .samples[2] = { .bitOffset = 9, .bitLength = 8, .channelType = KHR_DF_CHANNEL_RGBSDA_GREEN, .samplePosition0 = 0, .samplePosition1 = 0, .samplePosition2 = 0, .samplePosition3 = 0, .lower = 0, .upper = 8448, }, .samples[3] = { .bitOffset = 27, .bitLength = 4, .channelType = KHR_DF_CHANNEL_RGBSDA_GREEN | KHR_DF_SAMPLE_DATATYPE_EXPONENT, .samplePosition0 = 0, .samplePosition1 = 0, .samplePosition2 = 0, .samplePosition3 = 0, .lower = 15, .upper = 31, }, .samples[4] = { .bitOffset = 18, .bitLength = 8, .channelType = KHR_DF_CHANNEL_RGBSDA_BLUE, .samplePosition0 = 0, .samplePosition1 = 0, .samplePosition2 = 0, .samplePosition3 = 0, .lower = 0, .upper = 8448, }, .samples[5] = { .bitOffset = 27, .bitLength = 4, .channelType = KHR_DF_CHANNEL_RGBSDA_BLUE | KHR_DF_SAMPLE_DATATYPE_EXPONENT, .samplePosition0 = 0, .samplePosition1 = 0, .samplePosition2 = 0, .samplePosition3 = 0, .lower = 15, .upper = 31, } }; #else // For compilers which order bitfields from the msb rather than lsb. #define shift(x,val) ((val) << KHR_DF_SHIFT_ ## x) #define sampleshift(x,val) ((val) << KHR_DF_SAMPLESHIFT_ ## x) #define e5b9g9r9_bdbwordcount KHR_DFDSIZEWORDS(6) ktx_uint32_t e5b9g9r9_ufloat_comparator[e5b9g9r9_bdbwordcount] = { 0, // descriptorType & vendorId shift(DESCRIPTORBLOCKSIZE, e5b9g9r9_bdbwordcount * sizeof(ktx_uint32_t)) | shift(VERSIONNUMBER, 2), // N.B. Allow various values of primaries, transfer & flags shift(FLAGS, KHR_DF_FLAG_ALPHA_STRAIGHT) | shift(TRANSFER, KHR_DF_TRANSFER_LINEAR) | shift(PRIMARIES, KHR_DF_PRIMARIES_BT709) | shift(MODEL, KHR_DF_MODEL_RGBSDA), 0, // texelBlockDimension3~0 shift(BYTESPLANE0, 4), // All other bytesPlane fields are 0. 0, // bytesPlane7~4 sampleshift(CHANNELID, KHR_DF_CHANNEL_RGBSDA_RED) | sampleshift(BITLENGTH, 8) | sampleshift(BITOFFSET, 0), 0, // samplePosition3~0 0, // sampleLower 8448, // sampleUpper sampleshift(CHANNELID, KHR_DF_CHANNEL_RGBSDA_RED | KHR_DF_SAMPLE_DATATYPE_EXPONENT) | sampleshift(BITLENGTH, 4) | sampleshift(BITOFFSET, 27), 0, // samplePosition3~0 15, // sampleLower 31, // sampleUpper sampleshift(CHANNELID, KHR_DF_CHANNEL_RGBSDA_GREEN) | sampleshift(BITLENGTH, 8) | sampleshift(BITOFFSET, 9), 0, // samplePosition3~0 0, // sampleLower 8448, // sampleUpper sampleshift(CHANNELID, KHR_DF_CHANNEL_RGBSDA_GREEN | KHR_DF_SAMPLE_DATATYPE_EXPONENT) | sampleshift(BITLENGTH, 4) | sampleshift(BITOFFSET, 27), 0, // samplePosition3~0 15, // sampleLower 31, // sampleUpper sampleshift(CHANNELID, KHR_DF_CHANNEL_RGBSDA_BLUE) | sampleshift(BITLENGTH, 8) | sampleshift(BITOFFSET, 18), 0, // samplePosition3~0 0, // sampleLower 8448, // sampleUpper sampleshift(CHANNELID, KHR_DF_CHANNEL_RGBSDA_BLUE | KHR_DF_SAMPLE_DATATYPE_EXPONENT) | sampleshift(BITLENGTH, 4) | sampleshift(BITOFFSET, 27), 0, // samplePosition3~0 15, // sampleLower 31, // sampleUpper }; #endif /** * @private * @~English * @brief Initialize a ktxFormatSize object from the info in a DFD. * * This is used instead of referring to the DFD directly so code dealing * with format info can be common to KTX 1 & 2. * * @param[in] This pointer the ktxFormatSize to initialize. * @param[in] pDFD pointer to the DFD whose data to use. * * @return KTX_TRUE on success, otherwise KTX_FALSE. */ bool ktxFormatSize_initFromDfd(ktxFormatSize* This, ktx_uint32_t* pDfd) { uint32_t* pBdb = pDfd + 1; // Check the DFD is of the expected type and version. if (*pBdb != 0) { // Either decriptorType or vendorId is not 0 return false; } if (KHR_DFDVAL(pBdb, VERSIONNUMBER) != KHR_DF_VERSIONNUMBER_1_3) { return false; } // DFD has supported type and version. Process it. This->blockWidth = KHR_DFDVAL(pBdb, TEXELBLOCKDIMENSION0) + 1; This->blockHeight = KHR_DFDVAL(pBdb, TEXELBLOCKDIMENSION1) + 1; This->blockDepth = KHR_DFDVAL(pBdb, TEXELBLOCKDIMENSION2) + 1; This->blockSizeInBits = KHR_DFDVAL(pBdb, BYTESPLANE0) * 8; This->paletteSizeInBits = 0; // No paletted formats in ktx v2. This->flags = 0; This->minBlocksX = This->minBlocksY = 1; if (KHR_DFDVAL(pBdb, MODEL) >= KHR_DF_MODEL_DXT1A) { // A block compressed format. Entire block is a single sample. This->flags |= KTX_FORMAT_SIZE_COMPRESSED_BIT; if (KHR_DFDVAL(pBdb, MODEL) == KHR_DF_MODEL_PVRTC) { This->minBlocksX = This->minBlocksY = 2; } } else { // An uncompressed format. // Special case depth & depth stencil formats if (KHR_DFDSVAL(pBdb, 0, CHANNELID) == KHR_DF_CHANNEL_RGBSDA_DEPTH) { if (KHR_DFDSAMPLECOUNT(pBdb) == 1) { This->flags |= KTX_FORMAT_SIZE_DEPTH_BIT; } else if (KHR_DFDSAMPLECOUNT(pBdb) == 2) { This->flags |= KTX_FORMAT_SIZE_STENCIL_BIT; This->flags |= KTX_FORMAT_SIZE_DEPTH_BIT; This->flags |= KTX_FORMAT_SIZE_PACKED_BIT; } else { return false; } } else if (KHR_DFDSVAL(pBdb, 0, CHANNELID) == KHR_DF_CHANNEL_RGBSDA_STENCIL) { This->flags |= KTX_FORMAT_SIZE_STENCIL_BIT; } else if (KHR_DFDSAMPLECOUNT(pBdb) == 6 #if !defined(BITFIELD_ORDER_FROM_MSB) && !memcmp(((uint32_t*)&e5b9g9r9_ufloat_comparator) + KHR_DF_WORD_TEXELBLOCKDIMENSION0, &pBdb[KHR_DF_WORD_TEXELBLOCKDIMENSION0], sizeof(e5b9g9r9_ufloat_comparator)-(KHR_DF_WORD_TEXELBLOCKDIMENSION0)*sizeof(uint32_t))) { #else && !memcmp(&e5b9g9r9_ufloat_comparator[KHR_DF_WORD_TEXELBLOCKDIMENSION0], &pBdb[KHR_DF_WORD_TEXELBLOCKDIMENSION0], sizeof(e5b9g9r9_ufloat_comparator)-(KHR_DF_WORD_TEXELBLOCKDIMENSION0)*sizeof(uint32_t))) { #endif // Special case VK_FORMAT_E5B9G9R9_UFLOAT_PACK32 as interpretDFD // only handles "simple formats", i.e. where channels are described // in contiguous bits. This->flags |= KTX_FORMAT_SIZE_PACKED_BIT; } else { InterpretedDFDChannel rgba[4]; uint32_t wordBytes; enum InterpretDFDResult result; result = interpretDFD(pDfd, &rgba[0], &rgba[1], &rgba[2], &rgba[3], &wordBytes); if (result >= i_UNSUPPORTED_ERROR_BIT) return false; if (result & i_PACKED_FORMAT_BIT) This->flags |= KTX_FORMAT_SIZE_PACKED_BIT; if (result & i_COMPRESSED_FORMAT_BIT) This->flags |= KTX_FORMAT_SIZE_COMPRESSED_BIT; if (result & i_YUVSDA_FORMAT_BIT) This->flags |= KTX_FORMAT_SIZE_YUVSDA_BIT; } } if (This->blockSizeInBits == 0) { // The DFD shows a supercompressed texture. Complete the ktxFormatSize // struct by figuring out the post inflation value for bytesPlane0. // Setting it here simplifies stuff later in this file. Setting the // post inflation block size here will not cause any problems for // the following reasons. (1) in v2 files levelIndex is always used to // calculate data size and, of course, for the level offsets. (2) Finer // grain access to supercompressed data than levels is not possible. // // The value set here is applied to the DFD after the data has been // inflated during loading. This->blockSizeInBits = reconstructDFDBytesPlane0FromSamples(pDfd) * 8; } return true; } /** * @private * @~English * @brief Create a DFD for a VkFormat. * * This KTX-specific function adds support for combined depth stencil formats * which are not supported by @e dfdutils' @c vk2dfd function because they * are not seen outside a Vulkan device. KTX has its own definitions for * these that enable uploading, with some effort. * * @param[in] vkFormat the format for which to create a DFD. */ static uint32_t* ktxVk2dfd(ktx_uint32_t vkFormat) { return vk2dfd(vkFormat); } /** * @memberof ktxTexture2 @private * @~English * @brief Do the part of ktxTexture2 construction that is common to * new textures and those constructed from a stream. * * @param[in] This pointer to a ktxTexture2-sized block of memory to * initialize. * @param[in] numLevels the number of levels the texture must have. * * @return KTX_SUCCESS on success, other KTX_* enum values on error. * @exception KTX_OUT_OF_MEMORY Not enough memory for the texture data. */ static KTX_error_code ktxTexture2_constructCommon(ktxTexture2* This, ktx_uint32_t numLevels) { assert(This != NULL); ktx_size_t privateSize; This->classId = ktxTexture2_c; This->vtbl = &ktxTexture2_vtbl; This->_protected->_vtbl = ktxTexture2_vtblInt; privateSize = sizeof(ktxTexture2_private) + sizeof(ktxLevelIndexEntry) * (numLevels - 1); This->_private = (ktxTexture2_private*)malloc(privateSize); if (This->_private == NULL) { return KTX_OUT_OF_MEMORY; } memset(This->_private, 0, privateSize); return KTX_SUCCESS; } /** * @memberof ktxTexture2 @private * @~English * @brief Construct a new, empty, ktxTexture2. * * @param[in] This pointer to a ktxTexture2-sized block of memory to * initialize. * @param[in] createInfo pointer to a ktxTextureCreateInfo struct with * information describing the texture. * @param[in] storageAllocation * enum indicating whether or not to allocate storage * for the texture images. * @return KTX_SUCCESS on success, other KTX_* enum values on error. * @exception KTX_OUT_OF_MEMORY Not enough memory for the texture or image data. * @exception KTX_UNSUPPORTED_TEXTURE_TYPE * The request VkFormat is one of the * prohibited formats. */ static KTX_error_code ktxTexture2_construct(ktxTexture2* This, ktxTextureCreateInfo* createInfo, ktxTextureCreateStorageEnum storageAllocation) { ktxFormatSize formatSize; KTX_error_code result; memset(This, 0, sizeof(*This)); if (createInfo->vkFormat != VK_FORMAT_UNDEFINED) { This->pDfd = ktxVk2dfd(createInfo->vkFormat); if (!This->pDfd) return KTX_INVALID_VALUE; // Format is unknown or unsupported. #ifdef _DEBUG // If this fires, an unsupported format or incorrect DFD // has crept into vk2dfd. assert(ktxFormatSize_initFromDfd(&formatSize, This->pDfd)); #else (void)ktxFormatSize_initFromDfd(&formatSize, This->pDfd); #endif } else { // TODO: Validate createInfo->pDfd. This->pDfd = (ktx_uint32_t*)malloc(*createInfo->pDfd); if (!This->pDfd) return KTX_OUT_OF_MEMORY; memcpy(This->pDfd, createInfo->pDfd, *createInfo->pDfd); if (!ktxFormatSize_initFromDfd(&formatSize, This->pDfd)) { result = KTX_UNSUPPORTED_TEXTURE_TYPE; goto cleanup; } } result = ktxTexture_construct(ktxTexture(This), createInfo, &formatSize); if (result != KTX_SUCCESS) return result; result = ktxTexture2_constructCommon(This, createInfo->numLevels); if (result != KTX_SUCCESS) goto cleanup;; This->vkFormat = createInfo->vkFormat; // The typeSize cannot be reconstructed just from the DFD as the BDFD // does not capture the packing expressed by the [m]PACK[n] layout // information in the VkFormat, so we calculate the typeSize directly // from the vkFormat This->_protected->_typeSize = vkFormatTypeSize(createInfo->vkFormat); This->supercompressionScheme = KTX_SS_NONE; This->_private->_requiredLevelAlignment = ktxTexture2_calcRequiredLevelAlignment(This); // Create levelIndex. Offsets are from start of the KTX2 stream. ktxLevelIndexEntry* levelIndex = This->_private->_levelIndex; This->_private->_firstLevelFileOffset = 0; for (ktx_uint32_t level = 0; level < This->numLevels; level++) { levelIndex[level].uncompressedByteLength = ktxTexture_calcLevelSize(ktxTexture(This), level, KTX_FORMAT_VERSION_TWO); levelIndex[level].byteLength = levelIndex[level].uncompressedByteLength; levelIndex[level].byteOffset = ktxTexture_calcLevelOffset(ktxTexture(This), level); } // Allocate storage, if requested. if (storageAllocation == KTX_TEXTURE_CREATE_ALLOC_STORAGE) { This->dataSize = ktxTexture_calcDataSizeTexture(ktxTexture(This)); This->pData = malloc(This->dataSize); if (This->pData == NULL) { result = KTX_OUT_OF_MEMORY; goto cleanup; } } return result; cleanup: ktxTexture2_destruct(This); return result; } /** * @memberof ktxTexture2 @private * @~English * @brief Construct a ktxTexture by copying a source ktxTexture. * * @param[in] This pointer to a ktxTexture2-sized block of memory to * initialize. * @param[in] orig pointer to the source texture to copy. * * @return KTX_SUCCESS on success, other KTX_* enum values on error. * * @exception KTX_OUT_OF_MEMORY Not enough memory for the texture data. */ KTX_error_code ktxTexture2_constructCopy(ktxTexture2* This, ktxTexture2* orig) { KTX_error_code result; memcpy(This, orig, sizeof(ktxTexture2)); // Zero all the pointers to make error handling easier This->_protected = NULL; This->_private = NULL; This->pDfd = NULL; This->kvData = NULL; This->kvDataHead = NULL; This->pData = NULL; This->_protected = (ktxTexture_protected*)malloc(sizeof(ktxTexture_protected)); if (!This->_protected) return KTX_OUT_OF_MEMORY; // Must come before memcpy of _protected so as to close an active stream. if (!orig->pData && ktxTexture_isActiveStream((ktxTexture*)orig)) ktxTexture2_LoadImageData(orig, NULL, 0); memcpy(This->_protected, orig->_protected, sizeof(ktxTexture_protected)); ktx_size_t privateSize = sizeof(ktxTexture2_private) + sizeof(ktxLevelIndexEntry) * (orig->numLevels - 1); This->_private = (ktxTexture2_private*)malloc(privateSize); if (This->_private == NULL) { result = KTX_OUT_OF_MEMORY; goto cleanup; } memcpy(This->_private, orig->_private, privateSize); if (orig->_private->_sgdByteLength > 0) { This->_private->_supercompressionGlobalData = (ktx_uint8_t*)malloc(orig->_private->_sgdByteLength); if (!This->_private->_supercompressionGlobalData) { result = KTX_OUT_OF_MEMORY; goto cleanup; } memcpy(This->_private->_supercompressionGlobalData, orig->_private->_supercompressionGlobalData, orig->_private->_sgdByteLength); } This->pDfd = (ktx_uint32_t*)malloc(*orig->pDfd); if (!This->pDfd) { result = KTX_OUT_OF_MEMORY; goto cleanup; } memcpy(This->pDfd, orig->pDfd, *orig->pDfd); if (orig->kvDataHead) { ktxHashList_ConstructCopy(&This->kvDataHead, orig->kvDataHead); } else if (orig->kvData) { This->kvData = (ktx_uint8_t*)malloc(orig->kvDataLen); if (!This->kvData) { result = KTX_OUT_OF_MEMORY; goto cleanup; } memcpy(This->kvData, orig->kvData, orig->kvDataLen); } // Can't share the image data as the data pointer is exposed in the // ktxTexture2 structure. Changing it to a ref-counted pointer would // break code. Maybe that's okay as we're still pre-release. But, // since this constructor will be mostly be used when transcoding // supercompressed images, it is probably not too big a deal to make // a copy of the data. This->pData = (ktx_uint8_t*)malloc(This->dataSize); if (This->pData == NULL) { result = KTX_OUT_OF_MEMORY; goto cleanup; } memcpy(This->pData, orig->pData, orig->dataSize); return KTX_SUCCESS; cleanup: if (This->_protected) free(This->_protected); if (This->_private) { if (This->_private->_supercompressionGlobalData) free(This->_private->_supercompressionGlobalData); free(This->_private); } if (This->pDfd) free (This->pDfd); if (This->kvDataHead) ktxHashList_Destruct(&This->kvDataHead); return result; } /** * @memberof ktxTexture2 @private * @~English * @brief Construct a ktxTexture from a ktxStream reading from a KTX source. * * The KTX header, which must have been read prior to calling this, is passed * to the function. * * The stream object is copied into the constructed ktxTexture2. * * The create flag KTX_TEXTURE_CREATE_LOAD_IMAGE_DATA_BIT should not be set, * if the ktxTexture is ultimately to be uploaded to OpenGL or Vulkan. This * will minimize memory usage by allowing, for example, loading the images * directly from the source into a Vulkan staging buffer. * * The create flag KTX_TEXTURE_CREATE_RAW_KVDATA_BIT should not be used. It is * provided solely to enable implementation of the @e libktx v1 API on top of * ktxTexture. * * If either KTX_TEXTURE_CREATE_SKIP_KVDATA_BIT or * KTX_TEXTURE_CREATE_RAW_KVDATA_BIT is set then the ktxTexture's orientation * fields will be set to defaults even if the KTX source contains * KTXorientation metadata. * * @param[in] This pointer to a ktxTexture2-sized block of memory to * initialize. * @param[in] pStream pointer to the stream to read. * @param[in] pHeader pointer to a KTX header that has already been read from * the stream. * @param[in] createFlags bitmask requesting specific actions during creation. * * @return KTX_SUCCESS on success, other KTX_* enum values on error. * * @exception KTX_FILE_DATA_ERROR * Source data is inconsistent with the KTX * specification. * @exception KTX_FILE_READ_ERROR * An error occurred while reading the source. * @exception KTX_FILE_UNEXPECTED_EOF * Not enough data in the source. * @exception KTX_OUT_OF_MEMORY Not enough memory to load either the images or * the key-value data. * @exception KTX_UNKNOWN_FILE_FORMAT * The source is not in KTX format. * @exception KTX_UNSUPPORTED_TEXTURE_TYPE * The source describes a texture type not * supported by OpenGL or Vulkan, e.g, a 3D array. */ KTX_error_code ktxTexture2_constructFromStreamAndHeader(ktxTexture2* This, ktxStream* pStream, KTX_header2* pHeader, ktxTextureCreateFlags createFlags) { ktxTexture2_private* private; KTX_error_code result; KTX_supplemental_info suppInfo; ktxStream* stream; struct BDFD* pBDFD; ktx_size_t levelIndexSize; assert(pHeader != NULL && pStream != NULL); memset(This, 0, sizeof(*This)); result = ktxTexture_constructFromStream(ktxTexture(This), pStream, createFlags); if (result != KTX_SUCCESS) return result; result = ktxCheckHeader2_(pHeader, &suppInfo); if (result != KTX_SUCCESS) goto cleanup; // ktxCheckHeader2_ has done the max(1, levelCount) on pHeader->levelCount. result = ktxTexture2_constructCommon(This, pHeader->levelCount); if (result != KTX_SUCCESS) goto cleanup; private = This->_private; stream = ktxTexture2_getStream(This); /* * Initialize from pHeader->info. */ This->vkFormat = pHeader->vkFormat; This->supercompressionScheme = pHeader->supercompressionScheme; This->_protected->_typeSize = pHeader->typeSize; // Can these be done by a ktxTexture_constructFromStream? This->numDimensions = suppInfo.textureDimension; This->baseWidth = pHeader->pixelWidth; assert(suppInfo.textureDimension > 0 && suppInfo.textureDimension < 4); switch (suppInfo.textureDimension) { case 1: This->baseHeight = This->baseDepth = 1; break; case 2: This->baseHeight = pHeader->pixelHeight; This->baseDepth = 1; break; case 3: This->baseHeight = pHeader->pixelHeight; This->baseDepth = pHeader->pixelDepth; break; } if (pHeader->layerCount > 0) { This->numLayers = pHeader->layerCount; This->isArray = KTX_TRUE; } else { This->numLayers = 1; This->isArray = KTX_FALSE; } This->numFaces = pHeader->faceCount; if (pHeader->faceCount == 6) This->isCubemap = KTX_TRUE; else This->isCubemap = KTX_FALSE; // ktxCheckHeader2_ does the max(1, levelCount) and sets // suppInfo.generateMipmaps when it was originally 0. This->numLevels = pHeader->levelCount; This->generateMipmaps = suppInfo.generateMipmaps; // Read level index levelIndexSize = sizeof(ktxLevelIndexEntry) * This->numLevels; result = stream->read(stream, &private->_levelIndex, levelIndexSize); if (result != KTX_SUCCESS) goto cleanup; // Rebase index to start of data and save file offset. private->_firstLevelFileOffset = private->_levelIndex[This->numLevels-1].byteOffset; for (ktx_uint32_t level = 0; level < This->numLevels; level++) { private->_levelIndex[level].byteOffset -= private->_firstLevelFileOffset; if (This->supercompressionScheme == KTX_SS_NONE && private->_levelIndex[level].byteLength != private->_levelIndex[level].uncompressedByteLength) { // For non-supercompressed files the levels must have matching byte lengths result = KTX_FILE_DATA_ERROR; } } if (result != KTX_SUCCESS) goto cleanup; // Read DFD if (pHeader->dataFormatDescriptor.byteOffset == 0 || pHeader->dataFormatDescriptor.byteLength < 16) { // Missing or too small DFD result = KTX_FILE_DATA_ERROR; goto cleanup; } This->pDfd = (ktx_uint32_t*)malloc(pHeader->dataFormatDescriptor.byteLength); if (!This->pDfd) { result = KTX_OUT_OF_MEMORY; goto cleanup; } result = stream->read(stream, This->pDfd, pHeader->dataFormatDescriptor.byteLength); if (result != KTX_SUCCESS) goto cleanup; if (pHeader->dataFormatDescriptor.byteLength != This->pDfd[0]) { // DFD byteLength does not match dfdTotalSize result = KTX_FILE_DATA_ERROR; goto cleanup; } pBDFD = (struct BDFD*)(This->pDfd + 1); if (pBDFD->descriptorBlockSize < 24 || (pBDFD->descriptorBlockSize - 24) % 16 != 0) { // BDFD has invalid size result = KTX_FILE_DATA_ERROR; goto cleanup; } if (pBDFD->transfer != KHR_DF_TRANSFER_LINEAR && pBDFD->transfer != KHR_DF_TRANSFER_SRGB) { // Unsupported transfer function result = KTX_FILE_DATA_ERROR; goto cleanup; } if (!ktxFormatSize_initFromDfd(&This->_protected->_formatSize, This->pDfd)) { result = KTX_UNSUPPORTED_TEXTURE_TYPE; goto cleanup; } This->isCompressed = (This->_protected->_formatSize.flags & KTX_FORMAT_SIZE_COMPRESSED_BIT); if (This->supercompressionScheme == KTX_SS_BASIS_LZ && pBDFD->model != KHR_DF_MODEL_ETC1S) { result = KTX_FILE_DATA_ERROR; goto cleanup; } // Check compatibility with the KHR_texture_basisu glTF extension, if needed. if (createFlags & KTX_TEXTURE_CREATE_CHECK_GLTF_BASISU_BIT) { uint32_t max_dim = MAX(MAX(pHeader->pixelWidth, pHeader->pixelHeight), pHeader->pixelDepth); uint32_t full_mip_pyramid_level_count = 1 + (uint32_t)log2(max_dim); if (pHeader->levelCount != 1 && pHeader->levelCount != full_mip_pyramid_level_count) { // KHR_texture_basisu requires full mip pyramid or single mip level result = KTX_FILE_DATA_ERROR; goto cleanup; } if (This->numDimensions != 2 || This->isArray || This->isCubemap) { // KHR_texture_basisu requires 2D textures. result = KTX_FILE_DATA_ERROR; goto cleanup; } if ((This->baseWidth % 4) != 0 || (This->baseHeight % 4) != 0) { // KHR_texture_basisu requires width and height to be a multiple of 4. result = KTX_FILE_DATA_ERROR; goto cleanup; } if (pBDFD->model != KHR_DF_MODEL_ETC1S && pBDFD->model != KHR_DF_MODEL_UASTC) { // KHR_texture_basisu requires BasisLZ or UASTC result = KTX_FILE_DATA_ERROR; goto cleanup; } if (pBDFD->model == KHR_DF_MODEL_UASTC && This->supercompressionScheme != KTX_SS_NONE && This->supercompressionScheme != KTX_SS_ZSTD) { // KHR_texture_basisu only allows NONE and ZSTD supercompression for UASTC result = KTX_FILE_DATA_ERROR; goto cleanup; } } uint32_t sampleCount = KHR_DFDSAMPLECOUNT(This->pDfd + 1); if (sampleCount == 0) { // Invalid sample count result = KTX_FILE_DATA_ERROR; goto cleanup; } if (pBDFD->model == KHR_DF_MODEL_ETC1S || pBDFD->model == KHR_DF_MODEL_UASTC) { if (sampleCount < 1 || sampleCount > 2 || (sampleCount == 2 && pBDFD->model == KHR_DF_MODEL_UASTC)) { // Invalid sample count result = KTX_FILE_DATA_ERROR; goto cleanup; } if (pBDFD->texelBlockDimension0 != 3 || pBDFD->texelBlockDimension1 != 3 || pBDFD->texelBlockDimension2 != 0 || pBDFD->texelBlockDimension3 != 0) { // Texel block dimension must be 4x4x1x1 (offset by one) result = KTX_FILE_DATA_ERROR; goto cleanup; } } This->_private->_requiredLevelAlignment = ktxTexture2_calcRequiredLevelAlignment(This); // Make an empty hash list. ktxHashList_Construct(&This->kvDataHead); // Load KVData. if (pHeader->keyValueData.byteLength > 0) { uint32_t expectedOffset = pHeader->dataFormatDescriptor.byteOffset + pHeader->dataFormatDescriptor.byteLength; expectedOffset = (expectedOffset + 3) & ~0x3; // 4 byte aligned if (pHeader->keyValueData.byteOffset != expectedOffset) { result = KTX_FILE_DATA_ERROR; goto cleanup; } if (!(createFlags & KTX_TEXTURE_CREATE_SKIP_KVDATA_BIT)) { ktx_uint32_t kvdLen = pHeader->keyValueData.byteLength; ktx_uint8_t* pKvd; pKvd = malloc(kvdLen); if (pKvd == NULL) { result = KTX_OUT_OF_MEMORY; goto cleanup; } result = stream->read(stream, pKvd, kvdLen); if (result != KTX_SUCCESS) goto cleanup; if (IS_BIG_ENDIAN) { /* Swap the counts inside the key & value data. */ ktx_uint8_t* src = pKvd; ktx_uint8_t* end = pKvd + kvdLen; while (src < end) { ktx_uint32_t keyAndValueByteSize = *((ktx_uint32_t*)src); _ktxSwapEndian32(&keyAndValueByteSize, 1); src += _KTX_PAD4(keyAndValueByteSize); } } if (!(createFlags & KTX_TEXTURE_CREATE_RAW_KVDATA_BIT)) { char* orientationStr; ktx_uint32_t orientationLen; ktx_uint32_t animData[3]; ktx_uint32_t animDataLen; result = ktxHashList_Deserialize(&This->kvDataHead, kvdLen, pKvd); free(pKvd); if (result != KTX_SUCCESS) { goto cleanup; } result = ktxHashList_FindValue(&This->kvDataHead, KTX_ORIENTATION_KEY, &orientationLen, (void**)&orientationStr); assert(result != KTX_INVALID_VALUE); if (result == KTX_SUCCESS) { // Length includes the terminating NUL. if (orientationLen != This->numDimensions + 1) { // There needs to be an entry for each dimension of // the texture. result = KTX_FILE_DATA_ERROR; goto cleanup; } else { switch (This->numDimensions) { case 3: This->orientation.z = orientationStr[2]; FALLTHROUGH; case 2: This->orientation.y = orientationStr[1]; FALLTHROUGH; case 1: This->orientation.x = orientationStr[0]; } } } else { result = KTX_SUCCESS; // Not finding orientation is okay. } result = ktxHashList_FindValue(&This->kvDataHead, KTX_ANIMDATA_KEY, &animDataLen, (void**)animData); assert(result != KTX_INVALID_VALUE); if (result == KTX_SUCCESS) { if (animDataLen != sizeof(animData)) { result = KTX_FILE_DATA_ERROR; goto cleanup; } if (This->isArray) { This->isVideo = KTX_TRUE; This->duration = animData[0]; This->timescale = animData[1]; This->loopcount = animData[2]; } else { // animData is only valid for array textures. result = KTX_FILE_DATA_ERROR; goto cleanup; } } else { result = KTX_SUCCESS; // Not finding video is okay. } } else { This->kvDataLen = kvdLen; This->kvData = pKvd; } } else { stream->skip(stream, pHeader->keyValueData.byteLength); } } else if (pHeader->keyValueData.byteOffset != 0) { // Non-zero KVD byteOffset with zero byteLength result = KTX_FILE_DATA_ERROR; goto cleanup; } if (pHeader->supercompressionGlobalData.byteLength > 0) { switch (This->supercompressionScheme) { case KTX_SS_BASIS_LZ: break; case KTX_SS_NONE: case KTX_SS_ZSTD: case KTX_SS_ZLIB: // In these cases SGD is not allowed result = KTX_FILE_DATA_ERROR; break; default: // We don't support other supercompression schemes result = KTX_UNSUPPORTED_FEATURE; break; } if (result != KTX_SUCCESS) goto cleanup; // There could be padding here so seek to the next item. (void)stream->setpos(stream, pHeader->supercompressionGlobalData.byteOffset); // Read supercompressionGlobalData private->_supercompressionGlobalData = (ktx_uint8_t*)malloc(pHeader->supercompressionGlobalData.byteLength); if (!private->_supercompressionGlobalData) { result = KTX_OUT_OF_MEMORY; goto cleanup; } private->_sgdByteLength = pHeader->supercompressionGlobalData.byteLength; result = stream->read(stream, private->_supercompressionGlobalData, private->_sgdByteLength); if (result != KTX_SUCCESS) goto cleanup; } else if (pHeader->supercompressionGlobalData.byteOffset != 0) { // Non-zero SGD byteOffset with zero byteLength result = KTX_FILE_DATA_ERROR; goto cleanup; } else if (This->supercompressionScheme == KTX_SS_BASIS_LZ) { // SGD is required for BasisLZ result = KTX_FILE_DATA_ERROR; goto cleanup; } // Calculate size of the image data. Level 0 is the last level in the data. This->dataSize = private->_levelIndex[0].byteOffset + private->_levelIndex[0].byteLength; /* * Load the images, if requested. */ if (createFlags & KTX_TEXTURE_CREATE_LOAD_IMAGE_DATA_BIT) { result = ktxTexture2_LoadImageData(This, NULL, 0); } if (result != KTX_SUCCESS) goto cleanup; return result; cleanup: ktxTexture2_destruct(This); return result; } /** * @memberof ktxTexture2 @private * @~English * @brief Construct a ktxTexture from a ktxStream reading from a KTX source. * * The stream object is copied into the constructed ktxTexture2. * * The create flag KTX_TEXTURE_CREATE_LOAD_IMAGE_DATA_BIT should not be set, * if the ktxTexture is ultimately to be uploaded to OpenGL or Vulkan. This * will minimize memory usage by allowing, for example, loading the images * directly from the source into a Vulkan staging buffer. * * The create flag KTX_TEXTURE_CREATE_RAW_KVDATA_BIT should not be used. It is * provided solely to enable implementation of the @e libktx v1 API on top of * ktxTexture. * * @param[in] This pointer to a ktxTexture2-sized block of memory to * initialize. * @param[in] pStream pointer to the stream to read. * @param[in] createFlags bitmask requesting specific actions during creation. * * @return KTX_SUCCESS on success, other KTX_* enum values on error. * * @exception KTX_FILE_READ_ERROR * An error occurred while reading the source. * * For other exceptions see ktxTexture2_constructFromStreamAndHeader(). */ static KTX_error_code ktxTexture2_constructFromStream(ktxTexture2* This, ktxStream* pStream, ktxTextureCreateFlags createFlags) { KTX_header2 header; KTX_error_code result; // Read header. result = pStream->read(pStream, &header, KTX2_HEADER_SIZE); if (result != KTX_SUCCESS) return result; #if IS_BIG_ENDIAN // byte swap the header #endif return ktxTexture2_constructFromStreamAndHeader(This, pStream, &header, createFlags); } /** * @memberof ktxTexture2 @private * @~English * @brief Construct a ktxTexture from a stdio stream reading from a KTX source. * * See ktxTextureInt_constructFromStream for details. * * @note Do not close the stdio stream until you are finished with the texture * object. * * @param[in] This pointer to a ktxTextureInt-sized block of memory to * initialize. * @param[in] stdioStream a stdio FILE pointer opened on the source. * @param[in] createFlags bitmask requesting specific actions during creation. * * @return KTX_SUCCESS on success, other KTX_* enum values on error. * * @exception KTX_INVALID_VALUE Either @p stdiostream or @p This is null. * * For other exceptions, see ktxTexture_constructFromStream(). */ static KTX_error_code ktxTexture2_constructFromStdioStream(ktxTexture2* This, FILE* stdioStream, ktxTextureCreateFlags createFlags) { KTX_error_code result; ktxStream stream; if (stdioStream == NULL || This == NULL) return KTX_INVALID_VALUE; result = ktxFileStream_construct(&stream, stdioStream, KTX_FALSE); if (result == KTX_SUCCESS) result = ktxTexture2_constructFromStream(This, &stream, createFlags); return result; } /** * @memberof ktxTexture2 @private * @~English * @brief Construct a ktxTexture from a named KTX file. * * The file name must be encoded in utf-8. On Windows convert unicode names * to utf-8 with @c WideCharToMultiByte(CP_UTF8, ...) before calling. * * See ktxTextureInt_constructFromStream for details. * * @param[in] This pointer to a ktxTextureInt-sized block of memory to * initialize. * @param[in] filename pointer to a char array containing the file name. * @param[in] createFlags bitmask requesting specific actions during creation. * * @return KTX_SUCCESS on success, other KTX_* enum values on error. * * @exception KTX_FILE_OPEN_FAILED The file could not be opened. * @exception KTX_INVALID_VALUE @p filename is @c NULL. * * For other exceptions, see ktxTexture_constructFromStream(). */ static KTX_error_code ktxTexture2_constructFromNamedFile(ktxTexture2* This, const char* const filename, ktxTextureCreateFlags createFlags) { KTX_error_code result; ktxStream stream; FILE* file; if (This == NULL || filename == NULL) return KTX_INVALID_VALUE; file = ktxFOpenUTF8(filename, "rb"); if (!file) return KTX_FILE_OPEN_FAILED; result = ktxFileStream_construct(&stream, file, KTX_TRUE); if (result == KTX_SUCCESS) result = ktxTexture2_constructFromStream(This, &stream, createFlags); return result; } /** * @memberof ktxTexture2 @private * @~English * @brief Construct a ktxTexture from KTX-formatted data in memory. * * See ktxTextureInt_constructFromStream for details. * * @param[in] This pointer to a ktxTextureInt-sized block of memory to * initialize. * @param[in] bytes pointer to the memory containing the serialized KTX data. * @param[in] size length of the KTX data in bytes. * @param[in] createFlags bitmask requesting specific actions during creation. * * @return KTX_SUCCESS on success, other KTX_* enum values on error. * * @exception KTX_INVALID_VALUE Either @p bytes is NULL or @p size is 0. * * For other exceptions, see ktxTexture_constructFromStream(). */ static KTX_error_code ktxTexture2_constructFromMemory(ktxTexture2* This, const ktx_uint8_t* bytes, ktx_size_t size, ktxTextureCreateFlags createFlags) { KTX_error_code result; ktxStream stream; if (bytes == NULL || size == 0) return KTX_INVALID_VALUE; result = ktxMemStream_construct_ro(&stream, bytes, size); if (result == KTX_SUCCESS) result = ktxTexture2_constructFromStream(This, &stream, createFlags); return result; } /** * @memberof ktxTexture2 @private * @~English * @brief Destruct a ktxTexture2, freeing and internal memory. * * @param[in] This pointer to a ktxTexture2-sized block of memory to * initialize. */ void ktxTexture2_destruct(ktxTexture2* This) { if (This->pDfd) free(This->pDfd); if (This->_private) { ktx_uint8_t* sgd = This->_private->_supercompressionGlobalData; if (sgd) free(sgd); free(This->_private); } ktxTexture_destruct(ktxTexture(This)); } /** * @memberof ktxTexture2 * @ingroup writer * @~English * @brief Create a new empty ktxTexture2. * * The address of the newly created ktxTexture2 is written to the location * pointed at by @p newTex. * * @param[in] createInfo pointer to a ktxTextureCreateInfo struct with * information describing the texture. * @param[in] storageAllocation * enum indicating whether or not to allocate storage * for the texture images. * @param[in,out] newTex pointer to a location in which store the address of * the newly created texture. * * @return KTX_SUCCESS on success, other KTX_* enum values on error. * * @exception KTX_INVALID_VALUE @c glInternalFormat in @p createInfo is not a * valid OpenGL internal format value. * @exception KTX_INVALID_VALUE @c numDimensions in @p createInfo is not 1, 2 * or 3. * @exception KTX_INVALID_VALUE One of base{Width,Height,Depth} in * @p createInfo is 0. * @exception KTX_INVALID_VALUE @c numFaces in @p createInfo is not 1 or 6. * @exception KTX_INVALID_VALUE @c numLevels in @p createInfo is 0. * @exception KTX_INVALID_OPERATION * The base{Width,Height,Depth} specified * in @p createInfo are inconsistent with * @c numDimensions. * @exception KTX_INVALID_OPERATION * @p createInfo is requesting a 3D array or * 3D cubemap texture. * @exception KTX_INVALID_OPERATION * @p createInfo is requesting a cubemap with * non-square or non-2D images. * @exception KTX_INVALID_OPERATION * @p createInfo is requesting more mip levels * than needed for the specified * base{Width,Height,Depth}. * @exception KTX_OUT_OF_MEMORY Not enough memory for the texture's images. */ KTX_error_code ktxTexture2_Create(ktxTextureCreateInfo* createInfo, ktxTextureCreateStorageEnum storageAllocation, ktxTexture2** newTex) { KTX_error_code result; if (newTex == NULL) return KTX_INVALID_VALUE; ktxTexture2* tex = (ktxTexture2*)malloc(sizeof(ktxTexture2)); if (tex == NULL) return KTX_OUT_OF_MEMORY; result = ktxTexture2_construct(tex, createInfo, storageAllocation); if (result != KTX_SUCCESS) { free(tex); } else { *newTex = tex; } return result; } /** * @memberof ktxTexture2 * @ingroup writer * @~English * @brief Create a ktxTexture2 by making a copy of a ktxTexture2. * * The address of the newly created ktxTexture2 is written to the location * pointed at by @p newTex. * * @param[in] orig pointer to the texture to copy. * @param[in,out] newTex pointer to a location in which store the address of * the newly created texture. * * @return KTX_SUCCESS on success, other KTX_* enum values on error. * * @exception KTX_OUT_OF_MEMORY Not enough memory for the texture data. */ KTX_error_code ktxTexture2_CreateCopy(ktxTexture2* orig, ktxTexture2** newTex) { KTX_error_code result; if (newTex == NULL) return KTX_INVALID_VALUE; ktxTexture2* tex = (ktxTexture2*)malloc(sizeof(ktxTexture2)); if (tex == NULL) return KTX_OUT_OF_MEMORY; result = ktxTexture2_constructCopy(tex, orig); if (result != KTX_SUCCESS) { free(tex); } else { *newTex = tex; } return result; } /** * @defgroup reader Reader * @brief Read KTX-formatted data. * @{ */ /** * @memberof ktxTexture2 * @~English * @brief Create a ktxTexture2 from a stdio stream reading from a KTX source. * * The address of a newly created ktxTexture2 reflecting the contents of the * stdio stream is written to the location pointed at by @p newTex. * * The create flag KTX_TEXTURE_CREATE_LOAD_IMAGE_DATA_BIT should not be set, * if the ktxTexture is ultimately to be uploaded to OpenGL or Vulkan. This * will minimize memory usage by allowing, for example, loading the images * directly from the source into a Vulkan staging buffer. * * The create flag KTX_TEXTURE_CREATE_RAW_KVDATA_BIT should not be used. It is * provided solely to enable implementation of the @e libktx v1 API on top of * ktxTexture. * * @param[in] stdioStream stdio FILE pointer created from the desired file. * @param[in] createFlags bitmask requesting specific actions during creation. * @param[in,out] newTex pointer to a location in which store the address of * the newly created texture. * * @return KTX_SUCCESS on success, other KTX_* enum values on error. * * @exception KTX_INVALID_VALUE @p newTex is @c NULL. * @exception KTX_FILE_DATA_ERROR * Source data is inconsistent with the KTX * specification. * @exception KTX_FILE_READ_ERROR * An error occurred while reading the source. * @exception KTX_FILE_UNEXPECTED_EOF * Not enough data in the source. * @exception KTX_OUT_OF_MEMORY Not enough memory to create the texture object, * load the images or load the key-value data. * @exception KTX_UNKNOWN_FILE_FORMAT * The source is not in KTX format. * @exception KTX_UNSUPPORTED_TEXTURE_TYPE * The source describes a texture type not * supported by OpenGL or Vulkan, e.g, a 3D array. */ KTX_error_code ktxTexture2_CreateFromStdioStream(FILE* stdioStream, ktxTextureCreateFlags createFlags, ktxTexture2** newTex) { KTX_error_code result; if (newTex == NULL) return KTX_INVALID_VALUE; ktxTexture2* tex = (ktxTexture2*)malloc(sizeof(ktxTexture2)); if (tex == NULL) return KTX_OUT_OF_MEMORY; result = ktxTexture2_constructFromStdioStream(tex, stdioStream, createFlags); if (result == KTX_SUCCESS) *newTex = (ktxTexture2*)tex; else { free(tex); *newTex = NULL; } return result; } /** * @memberof ktxTexture2 * @~English * @brief Create a ktxTexture2 from a named KTX file. * * The address of a newly created ktxTexture2 reflecting the contents of the * file is written to the location pointed at by @p newTex. * * The file name must be encoded in utf-8. On Windows convert unicode names * to utf-8 with @c WideCharToMultiByte(CP_UTF8, ...) before calling. * * The create flag KTX_TEXTURE_CREATE_LOAD_IMAGE_DATA_BIT should not be set, * if the ktxTexture is ultimately to be uploaded to OpenGL or Vulkan. This * will minimize memory usage by allowing, for example, loading the images * directly from the source into a Vulkan staging buffer. * * The create flag KTX_TEXTURE_CREATE_RAW_KVDATA_BIT should not be used. It is * provided solely to enable implementation of the @e libktx v1 API on top of * ktxTexture. * * @param[in] filename pointer to a char array containing the file name. * @param[in] createFlags bitmask requesting specific actions during creation. * @param[in,out] newTex pointer to a location in which store the address of * the newly created texture. * * @return KTX_SUCCESS on success, other KTX_* enum values on error. * @exception KTX_FILE_OPEN_FAILED The file could not be opened. * @exception KTX_INVALID_VALUE @p filename is @c NULL. * * For other exceptions, see ktxTexture_CreateFromStdioStream(). */ KTX_error_code ktxTexture2_CreateFromNamedFile(const char* const filename, ktxTextureCreateFlags createFlags, ktxTexture2** newTex) { KTX_error_code result; if (newTex == NULL) return KTX_INVALID_VALUE; ktxTexture2* tex = (ktxTexture2*)malloc(sizeof(ktxTexture2)); if (tex == NULL) return KTX_OUT_OF_MEMORY; result = ktxTexture2_constructFromNamedFile(tex, filename, createFlags); if (result == KTX_SUCCESS) *newTex = (ktxTexture2*)tex; else { free(tex); *newTex = NULL; } return result; } /** * @memberof ktxTexture2 * @~English * @brief Create a ktxTexture2 from KTX-formatted data in memory. * * The address of a newly created ktxTexture2 reflecting the contents of the * serialized KTX data is written to the location pointed at by @p newTex. * * The create flag KTX_TEXTURE_CREATE_LOAD_IMAGE_DATA_BIT should not be set, * if the ktxTexture is ultimately to be uploaded to OpenGL or Vulkan. This * will minimize memory usage by allowing, for example, loading the images * directly from the source into a Vulkan staging buffer. * * The create flag KTX_TEXTURE_CREATE_RAW_KVDATA_BIT should not be used. It is * provided solely to enable implementation of the @e libktx v1 API on top of * ktxTexture. * * @param[in] bytes pointer to the memory containing the serialized KTX data. * @param[in] size length of the KTX data in bytes. * @param[in] createFlags bitmask requesting specific actions during creation. * @param[in,out] newTex pointer to a location in which store the address of * the newly created texture. * * @return KTX_SUCCESS on success, other KTX_* enum values on error. * * @exception KTX_INVALID_VALUE Either @p bytes is NULL or @p size is 0. * * For other exceptions, see ktxTexture_CreateFromStdioStream(). */ KTX_error_code ktxTexture2_CreateFromMemory(const ktx_uint8_t* bytes, ktx_size_t size, ktxTextureCreateFlags createFlags, ktxTexture2** newTex) { KTX_error_code result; if (newTex == NULL) return KTX_INVALID_VALUE; ktxTexture2* tex = (ktxTexture2*)malloc(sizeof(ktxTexture2)); if (tex == NULL) return KTX_OUT_OF_MEMORY; result = ktxTexture2_constructFromMemory(tex, bytes, size, createFlags); if (result == KTX_SUCCESS) *newTex = (ktxTexture2*)tex; else { free(tex); *newTex = NULL; } return result; } /** * @memberof ktxTexture2 * @~English * @brief Create a ktxTexture2 from KTX-formatted data from a stream. * * The address of a newly created ktxTexture2 reflecting the contents of the * serialized KTX data is written to the location pointed at by @p newTex. * * The create flag KTX_TEXTURE_CREATE_LOAD_IMAGE_DATA_BIT should not be set, * if the ktxTexture is ultimately to be uploaded to OpenGL or Vulkan. This * will minimize memory usage by allowing, for example, loading the images * directly from the source into a Vulkan staging buffer. * * The create flag KTX_TEXTURE_CREATE_RAW_KVDATA_BIT should not be used. It is * provided solely to enable implementation of the @e libktx v1 API on top of * ktxTexture. * * @param[in] stream pointer to the stream to read KTX data from. * @param[in] createFlags bitmask requesting specific actions during creation. * @param[in,out] newTex pointer to a location in which store the address of * the newly created texture. * * @return KTX_SUCCESS on success, other KTX_* enum values on error. * * @exception KTX_INVALID_VALUE Either @p bytes is NULL or @p size is 0. * * For other exceptions, see ktxTexture_CreateFromStdioStream(). */ KTX_error_code ktxTexture2_CreateFromStream(ktxStream* stream, ktxTextureCreateFlags createFlags, ktxTexture2** newTex) { KTX_error_code result; if (newTex == NULL) return KTX_INVALID_VALUE; ktxTexture2* tex = (ktxTexture2*)malloc(sizeof(ktxTexture2)); if (tex == NULL) return KTX_OUT_OF_MEMORY; result = ktxTexture2_constructFromStream(tex, stream, createFlags); if (result == KTX_SUCCESS) *newTex = (ktxTexture2*)tex; else { free(tex); *newTex = NULL; } return result; } /** * @memberof ktxTexture2 * @~English * @brief Destroy a ktxTexture2 object. * * This frees the memory associated with the texture contents and the memory * of the ktxTexture2 object. This does @e not delete any OpenGL or Vulkan * texture objects created by ktxTexture2_GLUpload or ktxTexture2_VkUpload. * * @param[in] This pointer to the ktxTexture2 object to destroy */ void ktxTexture2_Destroy(ktxTexture2* This) { ktxTexture2_destruct(This); free(This); } /** * @memberof ktxTexture2 @private * @~English * @brief Calculate the size of the image data for the specified number * of levels. * * The data size is the sum of the sizes of each level up to the number * specified and includes any @c mipPadding between levels. It does * not include initial @c mipPadding required in the file. * * @param[in] This pointer to the ktxTexture object of interest. * @param[in] levels number of levels whose data size to return. * * @return the data size in bytes. */ ktx_size_t ktxTexture2_calcDataSizeLevels(ktxTexture2* This, ktx_uint32_t levels) { ktx_size_t dataSize = 0; assert(This != NULL); assert(This->supercompressionScheme == KTX_SS_NONE); assert(levels <= This->numLevels); for (ktx_uint32_t i = levels - 1; i > 0; i--) { ktx_size_t levelSize = ktxTexture_calcLevelSize(ktxTexture(This), i, KTX_FORMAT_VERSION_TWO); dataSize += _KTX_PADN(This->_private->_requiredLevelAlignment, levelSize); } dataSize += ktxTexture_calcLevelSize(ktxTexture(This), 0, KTX_FORMAT_VERSION_TWO); return dataSize; } /** * @memberof ktxTexture2 @private * @~English * * @copydoc ktxTexture::ktxTexture_doCalcFaceLodSize */ ktx_size_t ktxTexture2_calcFaceLodSize(ktxTexture2* This, ktx_uint32_t level) { assert(This != NULL); assert(This->supercompressionScheme == KTX_SS_NONE); /* * For non-array cubemaps this is the size of a face. For everything * else it is the size of the level. */ if (This->isCubemap && !This->isArray) return ktxTexture_calcImageSize(ktxTexture(This), level, KTX_FORMAT_VERSION_TWO); else return This->_private->_levelIndex[level].uncompressedByteLength; } /** * @memberof ktxTexture2 @private * @~English * @brief Return the offset of a level in bytes from the start of the image * data in a ktxTexture. * * Since the offset is from the start of the image data, it does not include the initial * @c mipPadding required in the file. * * @param[in] This pointer to the ktxTexture object of interest. * @param[in] level level whose offset to return. * * @return the data size in bytes. */ ktx_size_t ktxTexture2_calcLevelOffset(ktxTexture2* This, ktx_uint32_t level) { assert (This != NULL); assert(This->supercompressionScheme == KTX_SS_NONE); assert (level < This->numLevels); ktx_size_t levelOffset = 0; for (ktx_uint32_t i = This->numLevels - 1; i > level; i--) { ktx_size_t levelSize; levelSize = ktxTexture_calcLevelSize(ktxTexture(This), i, KTX_FORMAT_VERSION_TWO); levelOffset += _KTX_PADN(This->_private->_requiredLevelAlignment, levelSize); } return levelOffset; } /** * @memberof ktxTexture2 @private * @~English * @brief Retrieve the offset of a level's first image within the KTX2 file. * * @param[in] This pointer to the ktxTexture object of interest. */ ktx_uint64_t ktxTexture2_levelFileOffset(ktxTexture2* This, ktx_uint32_t level) { assert(This->_private->_firstLevelFileOffset != 0); return This->_private->_levelIndex[level].byteOffset + This->_private->_firstLevelFileOffset; } // Recursive function to return the greatest common divisor of a and b. static uint32_t gcd(uint32_t a, uint32_t b) { if (a == 0) return b; return gcd(b % a, a); } // Function to return the least common multiple of a & 4. uint32_t lcm4(uint32_t a) { if (!(a & 0x03)) return a; // a is a multiple of 4. return (a*4) / gcd(a, 4); } /** * @memberof ktxTexture2 @private * @~English * @brief Return the required alignment for levels of this texture. * * @param[in] This pointer to the ktxTexture2 object of interest. * * @return The required alignment for levels. */ ktx_uint32_t ktxTexture2_calcRequiredLevelAlignment(ktxTexture2* This) { ktx_uint32_t alignment; if (This->supercompressionScheme != KTX_SS_NONE) alignment = 1; else alignment = lcm4(This->_protected->_formatSize.blockSizeInBits / 8); return alignment; } /** * @memberof ktxTexture2 @private * @~English * @brief Return what the required alignment for levels of this texture will be after inflation. * * @param[in] This pointer to the ktxTexture2 object of interest. * * @return The required alignment for levels. */ ktx_uint32_t ktxTexture2_calcPostInflationLevelAlignment(ktxTexture2* This) { ktx_uint32_t alignment; // Should actually work for none supercompressed but don't want to // encourage use of it. assert(This->supercompressionScheme != KTX_SS_NONE && This->supercompressionScheme != KTX_SS_BASIS_LZ); if (This->vkFormat != VK_FORMAT_UNDEFINED) alignment = lcm4(This->_protected->_formatSize.blockSizeInBits / 8); else alignment = 16; return alignment; } /** * @memberof ktxTexture2 * @~English * @brief Return information about the components of an image in a texture. * * @param[in] This pointer to the ktxTexture object of interest. * @param[in,out] pNumComponents pointer to location in which to write the * number of components in the textures images. * @param[in,out] pComponentByteLength * pointer to the location in which to write * byte length of a component. */ void ktxTexture2_GetComponentInfo(ktxTexture2* This, uint32_t* pNumComponents, uint32_t* pComponentByteLength) { // FIXME Need to handle packed case. getDFDComponentInfoUnpacked(This->pDfd, pNumComponents, pComponentByteLength); } /** * @memberof ktxTexture2 * @~English * @brief Return the number of components in an image of the texture. * * Returns the number of components indicated by the DFD's sample information * in accordance with the color model. For uncompressed formats it will be the actual * number of components in the image. For block-compressed formats, it will be 1 or 2 * according to the format's DFD color model. For Basis compressed textures, the * function examines the ids of the channels indicated by the DFD and uses that * information to determine and return the number of components in the image * @e before encoding and deflation so it can be used to help choose a suitable * transcode target format. * * @param[in] This pointer to the ktxTexture object of interest. * * @return the number of components. */ ktx_uint32_t ktxTexture2_GetNumComponents(ktxTexture2* This) { uint32_t* pBdb = This->pDfd + 1; uint32_t dfdNumComponents = getDFDNumComponents(This->pDfd); uint32_t colorModel = KHR_DFDVAL(pBdb, MODEL); if (colorModel < KHR_DF_MODEL_DXT1A) { return dfdNumComponents; } else { switch (colorModel) { case KHR_DF_MODEL_ETC1S: { uint32_t channel0Id = KHR_DFDSVAL(pBdb, 0, CHANNELID); if (dfdNumComponents == 1) { if (channel0Id == KHR_DF_CHANNEL_ETC1S_RGB) return 3; else return 1; } else { uint32_t channel1Id = KHR_DFDSVAL(pBdb, 1, CHANNELID); if (channel0Id == KHR_DF_CHANNEL_ETC1S_RGB && channel1Id == KHR_DF_CHANNEL_ETC1S_AAA) return 4; else { // An invalid combination of channel Ids should never // have been set during creation or should have been // caught when the file was loaded. assert(channel0Id == KHR_DF_CHANNEL_ETC1S_RRR && channel1Id == KHR_DF_CHANNEL_ETC1S_GGG); return 2; } } break; } case KHR_DF_MODEL_UASTC: switch (KHR_DFDSVAL(pBdb, 0, CHANNELID)) { case KHR_DF_CHANNEL_UASTC_RRR: return 1; case KHR_DF_CHANNEL_UASTC_RRRG: return 2; case KHR_DF_CHANNEL_UASTC_RGB: return 3; case KHR_DF_CHANNEL_UASTC_RGBA: return 4; default: // Same comment as for the assert in the ETC1 case. assert(false); return 1; } break; default: return dfdNumComponents; } } } /** * @memberof ktxTexture2 * @~English * @brief Find the offset of an image within a ktxTexture's image data. * * As there is no such thing as a 3D cubemap we make the 3rd location parameter * do double duty. Only works for non-supercompressed textures as * there is no way to tell where an image is for a supercompressed one. * * @param[in] This pointer to the ktxTexture object of interest. * @param[in] level mip level of the image. * @param[in] layer array layer of the image. * @param[in] faceSlice cube map face or depth slice of the image. * @param[in,out] pOffset pointer to location to store the offset. * * @return KTX_SUCCESS on success, other KTX_* enum values on error. * * @exception KTX_INVALID_OPERATION * @p level, @p layer or @p faceSlice exceed the * dimensions of the texture. * @exception KTX_INVALID_OPERATION Texture is supercompressed. * @exception KTX_INVALID_VALID @p This is NULL. */ KTX_error_code ktxTexture2_GetImageOffset(ktxTexture2* This, ktx_uint32_t level, ktx_uint32_t layer, ktx_uint32_t faceSlice, ktx_size_t* pOffset) { if (This == NULL) return KTX_INVALID_VALUE; if (level >= This->numLevels || layer >= This->numLayers) return KTX_INVALID_OPERATION; if (This->supercompressionScheme != KTX_SS_NONE) return KTX_INVALID_OPERATION; if (This->isCubemap) { if (faceSlice >= This->numFaces) return KTX_INVALID_OPERATION; } else { ktx_uint32_t maxSlice = MAX(1, This->baseDepth >> level); if (faceSlice >= maxSlice) return KTX_INVALID_OPERATION; } // Get the offset of the start of the level. *pOffset = ktxTexture2_levelDataOffset(This, level); // All layers, faces & slices within a level are the same size. if (layer != 0) { ktx_size_t layerSize; layerSize = ktxTexture_layerSize(ktxTexture(This), level, KTX_FORMAT_VERSION_TWO); *pOffset += layer * layerSize; } if (faceSlice != 0) { ktx_size_t imageSize; imageSize = ktxTexture2_GetImageSize(This, level); *pOffset += faceSlice * imageSize; } return KTX_SUCCESS; } /** * @memberof ktxTexture2 * @~English * @brief Retrieve the opto-electrical transfer function of the images. * * @param[in] This pointer to the ktxTexture2 object of interest. * * @return A @c khr_df_transfer enum value specifying the OETF. */ khr_df_transfer_e ktxTexture2_GetOETF_e(ktxTexture2* This) { return KHR_DFDVAL(This->pDfd+1, TRANSFER); } /** * @memberof ktxTexture2 * @~English * @brief Retrieve the opto-electrical transfer function of the images. * @deprecated Retained for backward compatibility. Use ktxTexture2\_GetOETF\_e() * * @param[in] This pointer to the ktxTexture2 object of interest. * * @return A @c khr_df_transfer enum value specifying the OETF, returned as * @c ktx_uint32_t. */ ktx_uint32_t ktxTexture2_GetOETF(ktxTexture2* This) { return KHR_DFDVAL(This->pDfd+1, TRANSFER); } /** * @memberof ktxTexture2 * @~English * @brief Retrieve the DFD color model of the images. * * @param[in] This pointer to the ktxTexture2 object of interest. * * @return A @c khr_df_transfer enum value specifying the color model. */ khr_df_model_e ktxTexture2_GetColorModel_e(ktxTexture2* This) { return KHR_DFDVAL(This->pDfd+1, MODEL); } /** * @memberof ktxTexture2 * @~English * @brief Retrieve whether the RGB components have been premultiplied by the alpha component. * * @param[in] This pointer to the ktxTexture2 object of interest. * * @return KTX\_TRUE if the components are premultiplied, KTX_FALSE otherwise. */ ktx_bool_t ktxTexture2_GetPremultipliedAlpha(ktxTexture2* This) { return KHR_DFDVAL(This->pDfd+1, FLAGS) & KHR_DF_FLAG_ALPHA_PREMULTIPLIED; } /** * @memberof ktxTexture2 * @~English * @brief Query if the images are in a transcodable format. * * @param[in] This pointer to the ktxTexture2 object of interest. */ ktx_bool_t ktxTexture2_NeedsTranscoding(ktxTexture2* This) { if (KHR_DFDVAL(This->pDfd + 1, MODEL) == KHR_DF_MODEL_ETC1S) return true; else if (KHR_DFDVAL(This->pDfd + 1, MODEL) == KHR_DF_MODEL_UASTC) return true; else return false; } /** * @memberof ktxTexture2 * @~English * @brief Return the total size in bytes of the uncompressed data of a * ktxTexture2. * * If supercompressionScheme == @c KTX_SS_NONE or * @c KTX_SS_BASIS_LZ, returns the value of @c This->dataSize * else if supercompressionScheme == @c KTX_SS_ZSTD or @c KTX_SS_ZLIB, it * returns the sum of the uncompressed sizes of each mip level plus space for * the level padding. With no supercompression the data size and uncompressed * data size are the same. For Basis supercompression the uncompressed size * cannot be known until the data is transcoded so the compressed size is * returned. * * @param[in] This pointer to the ktxTexture1 object of interest. */ ktx_size_t ktxTexture2_GetDataSizeUncompressed(ktxTexture2* This) { switch (This->supercompressionScheme) { case KTX_SS_BASIS_LZ: case KTX_SS_NONE: return This->dataSize; case KTX_SS_ZSTD: case KTX_SS_ZLIB: { ktx_size_t uncompressedSize = 0; ktx_uint32_t uncompressedLevelAlignment; ktxLevelIndexEntry* levelIndex = This->_private->_levelIndex; uncompressedLevelAlignment = ktxTexture2_calcPostInflationLevelAlignment(This); for (ktx_int32_t level = This->numLevels - 1; level >= 1; level--) { ktx_size_t uncompressedLevelSize; uncompressedLevelSize = levelIndex[level].uncompressedByteLength; uncompressedLevelSize = _KTX_PADN(uncompressedLevelAlignment, uncompressedLevelSize); uncompressedSize += uncompressedLevelSize; } uncompressedSize += levelIndex[0].uncompressedByteLength; return uncompressedSize; } case KTX_SS_BEGIN_VENDOR_RANGE: case KTX_SS_END_VENDOR_RANGE: case KTX_SS_BEGIN_RESERVED: default: return 0; } } /** * @memberof ktxTexture2 * @~English * @brief Calculate & return the size in bytes of an image at the specified * mip level. * * For arrays, this is the size of a layer, for cubemaps, the size of a face * and for 3D textures, the size of a depth slice. * * The size reflects the padding of each row to KTX_GL_UNPACK_ALIGNMENT. * * @param[in] This pointer to the ktxTexture2 object of interest. * @param[in] level level of interest. * */ ktx_size_t ktxTexture2_GetImageSize(ktxTexture2* This, ktx_uint32_t level) { return ktxTexture_calcImageSize(ktxTexture(This), level, KTX_FORMAT_VERSION_TWO); } /** * @memberof ktxTexture2 * @~English * @brief Iterate over the mip levels in a ktxTexture2 object. * * This is almost identical to ktxTexture_IterateLevelFaces(). The difference is * that the blocks of image data for non-array cube maps include all faces of * a mip level. * * This function works even if @p This->pData == 0 so it can be used to * obtain offsets and sizes for each level by callers who have loaded the data * externally. * * Intended for use only when supercompressionScheme == SUPERCOMPRESSION_NONE. * * @param[in] This handle of the ktxTexture opened on the data. * @param[in,out] iterCb the address of a callback function which is called * with the data for each image block. * @param[in,out] userdata the address of application-specific data which is * passed to the callback along with the image data. * * @return KTX_SUCCESS on success, other KTX_* enum values on error. The * following are returned directly by this function. @p iterCb may * return these for other causes or may return additional errors. * * @exception KTX_FILE_DATA_ERROR Mip level sizes are increasing not * decreasing * @exception KTX_INVALID_OPERATION supercompressionScheme != SUPERCOMPRESSION_NONE. * @exception KTX_INVALID_VALUE @p This is @c NULL or @p iterCb is @c NULL. * */ KTX_error_code ktxTexture2_IterateLevels(ktxTexture2* This, PFNKTXITERCB iterCb, void* userdata) { KTX_error_code result = KTX_SUCCESS; //ZSTD_DCtx* dctx; //ktx_uint8_t* decompBuf; ktxLevelIndexEntry* levelIndex = This->_private->_levelIndex; if (This == NULL) return KTX_INVALID_VALUE; if (iterCb == NULL) return KTX_INVALID_VALUE; if (This->supercompressionScheme != KTX_SS_NONE) return KTX_INVALID_OPERATION; for (ktx_int32_t level = This->numLevels - 1; level >= 0; level--) { ktx_uint32_t width, height, depth; ktx_uint64_t levelSize; ktx_uint64_t offset; /* Array textures have the same number of layers at each mip level. */ width = MAX(1, This->baseWidth >> level); height = MAX(1, This->baseHeight >> level); depth = MAX(1, This->baseDepth >> level); levelSize = levelIndex[level].uncompressedByteLength; offset = ktxTexture2_levelDataOffset(This, level); /* All array layers are passed in a group because that is how * GL & Vulkan need them. Hence no * for (layer = 0; layer < This->numLayers) */ result = iterCb(level, 0, width, height, depth, levelSize, This->pData + offset, userdata); if (result != KTX_SUCCESS) break; } return result; } /** * @memberof ktxTexture2 * @~English * @brief Iterate over the images in a ktxTexture2 object while loading the * image data. * * This operates similarly to ktxTexture_IterateLevelFaces() except that it * loads the images from the ktxTexture2's source to a temporary buffer * while iterating. If supercompressionScheme == KTX_SS_ZSTD or KTX_SS_ZLIB, * it will inflate the data before passing it to the callback. The callback function * must copy the image data if it wishes to preserve it as the temporary buffer * is reused for each level and is freed when this function exits. * * This function is helpful for reducing memory usage when uploading the data * to a graphics API. * * Intended for use only when supercompressionScheme == KTX_SS_NONE, * KTX_SS_ZSTD or KTX_SS_ZLIB. As there is no access to the ktxTexture's data on * conclusion of this function, destroying the texture on completion is recommended. * * @param[in] This pointer to the ktxTexture2 object of interest. * @param[in,out] iterCb the address of a callback function which is called * with the data for each image. * @param[in,out] userdata the address of application-specific data which is * passed to the callback along with the image data. * * @return KTX_SUCCESS on success, other KTX_* enum values on error. The * following are returned directly by this function. @p iterCb may * return these for other causes or may return additional errors. * * @exception KTX_FILE_DATA_ERROR mip level sizes are increasing not * decreasing * @exception KTX_INVALID_OPERATION the ktxTexture2 was not created from a * stream, i.e there is no data to load, or * this ktxTexture2's images have already * been loaded. * @exception KTX_INVALID_OPERATION * supercompressionScheme != KTX_SS_NONE, * supercompressionScheme != KTX_SS_ZSTD, and * supercompressionScheme != KTX_SS_ZLIB. * @exception KTX_INVALID_VALUE @p This is @c NULL or @p iterCb is @c NULL. * @exception KTX_OUT_OF_MEMORY not enough memory to allocate a block to * hold the base level image. */ KTX_error_code ktxTexture2_IterateLoadLevelFaces(ktxTexture2* This, PFNKTXITERCB iterCb, void* userdata) { DECLARE_PROTECTED(ktxTexture); ktxStream* stream = (ktxStream *)&prtctd->_stream; ktxLevelIndexEntry* levelIndex; ktx_size_t dataSize = 0, uncompressedDataSize = 0; KTX_error_code result = KTX_SUCCESS; ktx_uint8_t* dataBuf = NULL; ktx_uint8_t* uncompressedDataBuf = NULL; ktx_uint8_t* pData; ZSTD_DCtx* dctx = NULL; if (This == NULL) return KTX_INVALID_VALUE; if (This->classId != ktxTexture2_c) return KTX_INVALID_OPERATION; if (This->supercompressionScheme != KTX_SS_NONE && This->supercompressionScheme != KTX_SS_ZSTD && This->supercompressionScheme != KTX_SS_ZLIB) return KTX_INVALID_OPERATION; if (iterCb == NULL) return KTX_INVALID_VALUE; if (prtctd->_stream.data.file == NULL) // This Texture not created from a stream or images are already loaded. return KTX_INVALID_OPERATION; levelIndex = This->_private->_levelIndex; // Allocate memory sufficient for the base level dataSize = levelIndex[0].byteLength; dataBuf = malloc(dataSize); if (!dataBuf) return KTX_OUT_OF_MEMORY; if (This->supercompressionScheme == KTX_SS_ZSTD || This->supercompressionScheme == KTX_SS_ZLIB) { uncompressedDataSize = levelIndex[0].uncompressedByteLength; uncompressedDataBuf = malloc(uncompressedDataSize); if (!uncompressedDataBuf) { result = KTX_OUT_OF_MEMORY; goto cleanup; } if (This->supercompressionScheme == KTX_SS_ZSTD) { dctx = ZSTD_createDCtx(); } pData = uncompressedDataBuf; } else { pData = dataBuf; } for (ktx_int32_t level = This->numLevels - 1; level >= 0; --level) { ktx_size_t levelSize; GLsizei width, height, depth; // Array textures have the same number of layers at each mip level. width = MAX(1, This->baseWidth >> level); height = MAX(1, This->baseHeight >> level); depth = MAX(1, This->baseDepth >> level); levelSize = levelIndex[level].byteLength; if (dataSize < levelSize) { // Levels cannot be larger than the base level result = KTX_FILE_DATA_ERROR; goto cleanup; } // Use setpos so we skip any padding. result = stream->setpos(stream, ktxTexture2_levelFileOffset(This, level)); if (result != KTX_SUCCESS) goto cleanup; result = stream->read(stream, dataBuf, levelSize); if (result != KTX_SUCCESS) goto cleanup; if (This->supercompressionScheme == KTX_SS_ZSTD) { levelSize = ZSTD_decompressDCtx(dctx, uncompressedDataBuf, uncompressedDataSize, dataBuf, levelSize); if (ZSTD_isError(levelSize)) { ZSTD_ErrorCode error = ZSTD_getErrorCode(levelSize); switch(error) { case ZSTD_error_dstSize_tooSmall: return KTX_DECOMPRESS_LENGTH_ERROR; // inflatedDataCapacity too small. case ZSTD_error_checksum_wrong: return KTX_DECOMPRESS_CHECKSUM_ERROR; case ZSTD_error_memory_allocation: return KTX_OUT_OF_MEMORY; default: return KTX_FILE_DATA_ERROR; } } // We don't fix up the texture's dataSize, levelIndex or // _requiredAlignment because after this function completes there // is no way to get at the texture's data. //nindex[level].byteOffset = levelOffset; //nindex[level].uncompressedByteLength = nindex[level].byteLength = //levelByteLength; } else if (This->supercompressionScheme == KTX_SS_ZLIB) { result = ktxUncompressZLIBInt(uncompressedDataBuf, &uncompressedDataSize, dataBuf, levelSize); if (result != KTX_SUCCESS) return result; } if (levelIndex[level].uncompressedByteLength != levelSize) return KTX_DECOMPRESS_LENGTH_ERROR; #if IS_BIG_ENDIAN switch (prtctd->_typeSize) { case 2: _ktxSwapEndian16((ktx_uint16_t*)pData, levelSize / 2); break; case 4: _ktxSwapEndian32((ktx_uint32_t*)pDest, levelSize / 4); break; case 8: _ktxSwapEndian64((ktx_uint64_t*)pDest, levelSize / 8); break; } #endif // With the exception of non-array cubemaps the entire level // is passed at once because that is how OpenGL and Vulkan need them. // Vulkan could take all the faces at once too but we iterate // them separately for OpenGL. if (This->isCubemap && !This->isArray) { ktx_uint8_t* pFace = pData; struct blockCount { ktx_uint32_t x, y; } blockCount; ktx_size_t faceSize; blockCount.x = (uint32_t)ceilf((float)width / prtctd->_formatSize.blockWidth); blockCount.y = (uint32_t)ceilf((float)height / prtctd->_formatSize.blockHeight); blockCount.x = MAX(prtctd->_formatSize.minBlocksX, blockCount.x); blockCount.y = MAX(prtctd->_formatSize.minBlocksX, blockCount.y); faceSize = blockCount.x * blockCount.y * prtctd->_formatSize.blockSizeInBits / 8; for (ktx_uint32_t face = 0; face < This->numFaces; ++face) { result = iterCb(level, face, width, height, depth, (ktx_uint32_t)faceSize, pFace, userdata); pFace += faceSize; if (result != KTX_SUCCESS) goto cleanup; } } else { result = iterCb(level, 0, width, height, depth, (ktx_uint32_t)levelSize, pData, userdata); if (result != KTX_SUCCESS) goto cleanup; } } // No further need for this. stream->destruct(stream); This->_private->_firstLevelFileOffset = 0; cleanup: free(dataBuf); if (uncompressedDataBuf) free(uncompressedDataBuf); if (dctx) ZSTD_freeDCtx(dctx); return result; } KTX_error_code ktxTexture2_inflateZstdInt(ktxTexture2* This, ktx_uint8_t* pDeflatedData, ktx_uint8_t* pInflatedData, ktx_size_t inflatedDataCapacity); KTX_error_code ktxTexture2_inflateZLIBInt(ktxTexture2* This, ktx_uint8_t* pDeflatedData, ktx_uint8_t* pInflatedData, ktx_size_t inflatedDataCapacity); /** * @memberof ktxTexture2 * @~English * @brief Load all the image data from the ktxTexture2's source. * * The data will be inflated if supercompressionScheme == @c KTX_SS_ZSTD or * @c KTX_SS_ZLIB. * The data is loaded into the provided buffer or to an internally allocated * buffer, if @p pBuffer is @c NULL. Callers providing their own buffer must * ensure the buffer large enough to hold the inflated data for files deflated * with Zstd or ZLIB. See ktxTexture2\_GetDataSizeUncompressed(). * * The texture's levelIndex, dataSize, DFD and supercompressionScheme will * all be updated after successful inflation to reflect the inflated data. * * @param[in] This pointer to the ktxTexture object of interest. * @param[in] pBuffer pointer to the buffer in which to load the image data. * @param[in] bufSize size of the buffer pointed at by @p pBuffer. * * @return KTX_SUCCESS on success, other KTX_* enum values on error. * * @exception KTX_INVALID_VALUE @p This is NULL. * @exception KTX_INVALID_VALUE @p bufSize is less than the the image data size. * @exception KTX_INVALID_OPERATION * The data has already been loaded or the * ktxTexture was not created from a KTX source. * @exception KTX_OUT_OF_MEMORY Insufficient memory for the image data. */ KTX_error_code ktxTexture2_LoadImageData(ktxTexture2* This, ktx_uint8_t* pBuffer, ktx_size_t bufSize) { DECLARE_PROTECTED(ktxTexture); DECLARE_PRIVATE(ktxTexture2); ktx_uint8_t* pDest; ktx_uint8_t* pDeflatedData = 0; ktx_uint8_t* pReadBuf; KTX_error_code result = KTX_SUCCESS; ktx_size_t inflatedDataCapacity = ktxTexture2_GetDataSizeUncompressed(This); if (This == NULL) return KTX_INVALID_VALUE; if (This->pData != NULL) return KTX_INVALID_OPERATION; // Data already loaded. if (prtctd->_stream.data.file == NULL) // This Texture not created from a stream or images already loaded; return KTX_INVALID_OPERATION; if (pBuffer == NULL) { This->pData = malloc(inflatedDataCapacity); if (This->pData == NULL) return KTX_OUT_OF_MEMORY; pDest = This->pData; } else if (bufSize < inflatedDataCapacity) { return KTX_INVALID_VALUE; } else { pDest = pBuffer; } if (This->supercompressionScheme == KTX_SS_ZSTD || This->supercompressionScheme == KTX_SS_ZLIB) { // Create buffer to hold deflated data. pDeflatedData = malloc(This->dataSize); if (pDeflatedData == NULL) return KTX_OUT_OF_MEMORY; pReadBuf = pDeflatedData; } else { pReadBuf = pDest; } // Seek to data for first level as there may be padding between the // metadata/sgd and the image data. result = prtctd->_stream.setpos(&prtctd->_stream, private->_firstLevelFileOffset); if (result != KTX_SUCCESS) return result; result = prtctd->_stream.read(&prtctd->_stream, pReadBuf, This->dataSize); if (result != KTX_SUCCESS) return result; if (This->supercompressionScheme == KTX_SS_ZSTD || This->supercompressionScheme == KTX_SS_ZLIB) { assert(pDeflatedData != NULL); if (This->supercompressionScheme == KTX_SS_ZSTD) { result = ktxTexture2_inflateZstdInt(This, pDeflatedData, pDest, inflatedDataCapacity); } else if (This->supercompressionScheme == KTX_SS_ZLIB) { result = ktxTexture2_inflateZLIBInt(This, pDeflatedData, pDest, inflatedDataCapacity); } free(pDeflatedData); if (result != KTX_SUCCESS) { if (pBuffer == NULL) { free(This->pData); This->pData = 0; } return result; } } if (IS_BIG_ENDIAN) { // Perform endianness conversion on texture data. // To avoid mip padding, need to convert each level individually. for (ktx_uint32_t level = 0; level < This->numLevels; ++level) { ktx_size_t levelOffset; ktx_size_t levelByteLength; levelByteLength = private->_levelIndex[level].byteLength; levelOffset = ktxTexture2_levelDataOffset(This, level); pDest = This->pData + levelOffset; switch (prtctd->_typeSize) { case 2: _ktxSwapEndian16((ktx_uint16_t*)pDest, levelByteLength / 2); break; case 4: _ktxSwapEndian32((ktx_uint32_t*)pDest, levelByteLength / 4); break; case 8: _ktxSwapEndian64((ktx_uint64_t*)pDest, levelByteLength / 8); break; } } } // No further need for stream or file offset. prtctd->_stream.destruct(&prtctd->_stream); private->_firstLevelFileOffset = 0; return result; } /** * @memberof ktxTexture2 @private * @~English * @brief Retrieve the offset of a level's first image within the ktxTexture2's * image data. * * @param[in] This pointer to the ktxTexture2 object of interest. */ ktx_uint64_t ktxTexture2_levelDataOffset(ktxTexture2* This, ktx_uint32_t level) { return This->_private->_levelIndex[level].byteOffset; } /** * @memberof ktxTexture2 @private * @~English * @brief Inflate the data in a ktxTexture2 object using Zstandard. * * The texture's levelIndex, dataSize, DFD and supercompressionScheme will * all be updated after successful inflation to reflect the inflated data. * * @param[in] This pointer to the ktxTexture2 object of interest. * @param[in] pDeflatedData pointer to a buffer containing the deflated data * of the entire texture. * @param[in,out] pInflatedData pointer to a buffer in which to write the inflated * data. * @param[in] inflatedDataCapacity capacity of the buffer pointed at by * @p pInflatedData. */ KTX_error_code ktxTexture2_inflateZstdInt(ktxTexture2* This, ktx_uint8_t* pDeflatedData, ktx_uint8_t* pInflatedData, ktx_size_t inflatedDataCapacity) { DECLARE_PROTECTED(ktxTexture); ktx_uint32_t levelIndexByteLength = This->numLevels * sizeof(ktxLevelIndexEntry); uint64_t levelOffset = 0; ktxLevelIndexEntry* cindex = This->_private->_levelIndex; ktxLevelIndexEntry* nindex; ktx_uint32_t uncompressedLevelAlignment; ZSTD_DCtx* dctx; if (pDeflatedData == NULL) return KTX_INVALID_VALUE; if (pInflatedData == NULL) return KTX_INVALID_VALUE; if (This->supercompressionScheme != KTX_SS_ZSTD) return KTX_INVALID_OPERATION; nindex = malloc(levelIndexByteLength); if (nindex == NULL) return KTX_OUT_OF_MEMORY; uncompressedLevelAlignment = ktxTexture2_calcPostInflationLevelAlignment(This); ktx_size_t inflatedByteLength = 0; dctx = ZSTD_createDCtx(); for (int32_t level = This->numLevels - 1; level >= 0; level--) { size_t levelByteLength = ZSTD_decompressDCtx(dctx, pInflatedData + levelOffset, inflatedDataCapacity, &pDeflatedData[cindex[level].byteOffset], cindex[level].byteLength); if (ZSTD_isError(levelByteLength)) { ZSTD_ErrorCode error = ZSTD_getErrorCode(levelByteLength); switch(error) { case ZSTD_error_dstSize_tooSmall: return KTX_DECOMPRESS_LENGTH_ERROR; // inflatedDataCapacity too small. case ZSTD_error_checksum_wrong: return KTX_DECOMPRESS_CHECKSUM_ERROR; case ZSTD_error_memory_allocation: return KTX_OUT_OF_MEMORY; default: return KTX_FILE_DATA_ERROR; } } if (This->_private->_levelIndex[level].uncompressedByteLength != levelByteLength) return KTX_DECOMPRESS_LENGTH_ERROR; nindex[level].byteOffset = levelOffset; nindex[level].uncompressedByteLength = nindex[level].byteLength = levelByteLength; ktx_size_t paddedLevelByteLength = _KTX_PADN(uncompressedLevelAlignment, levelByteLength); inflatedByteLength += paddedLevelByteLength; levelOffset += paddedLevelByteLength; inflatedDataCapacity -= paddedLevelByteLength; } ZSTD_freeDCtx(dctx); // Now modify the texture. This->dataSize = inflatedByteLength; This->supercompressionScheme = KTX_SS_NONE; memcpy(cindex, nindex, levelIndexByteLength); // Update level index free(nindex); This->_private->_requiredLevelAlignment = uncompressedLevelAlignment; // Set bytesPlane as we're now sized. uint32_t* bdb = This->pDfd + 1; // blockSizeInBits was set to the inflated size on file load. bdb[KHR_DF_WORD_BYTESPLANE0] = prtctd->_formatSize.blockSizeInBits / 8; return KTX_SUCCESS; } /** * @memberof ktxTexture2 @private * @~English * @brief Inflate the data in a ktxTexture2 object using miniz (ZLIB). * * The texture's levelIndex, dataSize, DFD and supercompressionScheme will * all be updated after successful inflation to reflect the inflated data. * * @param[in] This pointer to the ktxTexture2 object of interest. * @param[in] pDeflatedData pointer to a buffer containing the deflated * data of the entire texture. * @param[in,out] pInflatedData pointer to a buffer in which to write the * inflated data. * @param[in] inflatedDataCapacity capacity of the buffer pointed at by * @p pInflatedData. */ KTX_error_code ktxTexture2_inflateZLIBInt(ktxTexture2* This, ktx_uint8_t* pDeflatedData, ktx_uint8_t* pInflatedData, ktx_size_t inflatedDataCapacity) { DECLARE_PROTECTED(ktxTexture); ktx_uint32_t levelIndexByteLength = This->numLevels * sizeof(ktxLevelIndexEntry); uint64_t levelOffset = 0; ktxLevelIndexEntry* cindex = This->_private->_levelIndex; ktxLevelIndexEntry* nindex; ktx_uint32_t uncompressedLevelAlignment; if (pDeflatedData == NULL) return KTX_INVALID_VALUE; if (pInflatedData == NULL) return KTX_INVALID_VALUE; if (This->supercompressionScheme != KTX_SS_ZLIB) return KTX_INVALID_OPERATION; nindex = malloc(levelIndexByteLength); if (nindex == NULL) return KTX_OUT_OF_MEMORY; uncompressedLevelAlignment = ktxTexture2_calcPostInflationLevelAlignment(This); ktx_size_t inflatedByteLength = 0; for (int32_t level = This->numLevels - 1; level >= 0; level--) { size_t levelByteLength = inflatedDataCapacity; KTX_error_code result = ktxUncompressZLIBInt(pInflatedData + levelOffset, &levelByteLength, &pDeflatedData[cindex[level].byteOffset], cindex[level].byteLength); if (result != KTX_SUCCESS) return result; if (This->_private->_levelIndex[level].uncompressedByteLength != levelByteLength) return KTX_DECOMPRESS_LENGTH_ERROR; nindex[level].byteOffset = levelOffset; nindex[level].uncompressedByteLength = nindex[level].byteLength = levelByteLength; ktx_size_t paddedLevelByteLength = _KTX_PADN(uncompressedLevelAlignment, levelByteLength); inflatedByteLength += paddedLevelByteLength; levelOffset += paddedLevelByteLength; inflatedDataCapacity -= paddedLevelByteLength; } // Now modify the texture. This->dataSize = inflatedByteLength; This->supercompressionScheme = KTX_SS_NONE; memcpy(cindex, nindex, levelIndexByteLength); // Update level index free(nindex); This->_private->_requiredLevelAlignment = uncompressedLevelAlignment; // Set bytesPlane as we're now sized. uint32_t* bdb = This->pDfd + 1; // blockSizeInBits was set to the inflated size on file load. bdb[KHR_DF_WORD_BYTESPLANE0] = prtctd->_formatSize.blockSizeInBits / 8; return KTX_SUCCESS; } #if !KTX_FEATURE_WRITE /* * Stubs for writer functions that return a proper error code */ KTX_error_code ktxTexture2_SetImageFromMemory(ktxTexture2* This, ktx_uint32_t level, ktx_uint32_t layer, ktx_uint32_t faceSlice, const ktx_uint8_t* src, ktx_size_t srcSize) { UNUSED(This); UNUSED(level); UNUSED(layer); UNUSED(faceSlice); UNUSED(src); UNUSED(srcSize); return KTX_INVALID_OPERATION; } KTX_error_code ktxTexture2_SetImageFromStdioStream(ktxTexture2* This, ktx_uint32_t level, ktx_uint32_t layer, ktx_uint32_t faceSlice, FILE* src, ktx_size_t srcSize) { UNUSED(This); UNUSED(level); UNUSED(layer); UNUSED(faceSlice); UNUSED(src); UNUSED(srcSize); return KTX_INVALID_OPERATION; } KTX_error_code ktxTexture2_WriteToStdioStream(ktxTexture2* This, FILE* dstsstr) { UNUSED(This); UNUSED(dstsstr); return KTX_INVALID_OPERATION; } KTX_error_code ktxTexture2_WriteToNamedFile(ktxTexture2* This, const char* const dstname) { UNUSED(This); UNUSED(dstname); return KTX_INVALID_OPERATION; } KTX_error_code ktxTexture2_WriteToMemory(ktxTexture2* This, ktx_uint8_t** ppDstBytes, ktx_size_t* pSize) { UNUSED(This); UNUSED(ppDstBytes); UNUSED(pSize); return KTX_INVALID_OPERATION; } KTX_error_code ktxTexture2_WriteToStream(ktxTexture2* This, ktxStream* dststr) { UNUSED(This); UNUSED(dststr); return KTX_INVALID_OPERATION; } #endif /* * Initialized here at the end to avoid the need for multiple declarations of * the virtual functions. */ struct ktxTexture_vtblInt ktxTexture2_vtblInt = { (PFNCALCDATASIZELEVELS)ktxTexture2_calcDataSizeLevels, (PFNCALCFACELODSIZE)ktxTexture2_calcFaceLodSize, (PFNCALCLEVELOFFSET)ktxTexture2_calcLevelOffset }; struct ktxTexture_vtbl ktxTexture2_vtbl = { (PFNKTEXDESTROY)ktxTexture2_Destroy, (PFNKTEXGETIMAGEOFFSET)ktxTexture2_GetImageOffset, (PFNKTEXGETDATASIZEUNCOMPRESSED)ktxTexture2_GetDataSizeUncompressed, (PFNKTEXGETIMAGESIZE)ktxTexture2_GetImageSize, (PFNKTEXITERATELEVELS)ktxTexture2_IterateLevels, (PFNKTEXITERATELOADLEVELFACES)ktxTexture2_IterateLoadLevelFaces, (PFNKTEXNEEDSTRANSCODING)ktxTexture2_NeedsTranscoding, (PFNKTEXLOADIMAGEDATA)ktxTexture2_LoadImageData, (PFNKTEXSETIMAGEFROMMEMORY)ktxTexture2_SetImageFromMemory, (PFNKTEXSETIMAGEFROMSTDIOSTREAM)ktxTexture2_SetImageFromStdioStream, (PFNKTEXWRITETOSTDIOSTREAM)ktxTexture2_WriteToStdioStream, (PFNKTEXWRITETONAMEDFILE)ktxTexture2_WriteToNamedFile, (PFNKTEXWRITETOMEMORY)ktxTexture2_WriteToMemory, (PFNKTEXWRITETOSTREAM)ktxTexture2_WriteToStream, }; /** @} */