1844 lines
68 KiB
C++
1844 lines
68 KiB
C++
/* -*- tab-width: 4; -*- */
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/* vi: set sw=2 ts=4 expandtab: */
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#ifndef KTX_H_A55A6F00956F42F3A137C11929827FE1
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#define KTX_H_A55A6F00956F42F3A137C11929827FE1
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/*
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* Copyright 2010-2018 The Khronos Group, Inc.
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* SPDX-License-Identifier: Apache-2.0
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*
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* See the accompanying LICENSE.md for licensing details for all files in
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* the KTX library and KTX loader tests.
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*/
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/**
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* @file
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* @~English
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*
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* @brief Declares the public functions and structures of the
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* KTX API.
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*
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* @author Mark Callow, Edgewise Consulting and while at HI Corporation
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* @author Based on original work by Georg Kolling, Imagination Technology
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*
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* @snippet{doc} version.h API version
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*/
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#include <limits.h>
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#include <stdio.h>
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#include <stdbool.h>
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#include <sys/types.h>
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#include <KHR/khr_df.h>
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/*
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* Don't use khrplatform.h in order not to break apps existing
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* before these definitions were needed.
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*/
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#if defined(KHRONOS_STATIC)
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#define KTX_API
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#elif defined(_WIN32) || defined(__CYGWIN__)
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#if !defined(KTX_API)
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#if __GNUC__
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#define KTX_API __attribute__ ((dllimport))
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#elif _MSC_VER
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#define KTX_API __declspec(dllimport)
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#else
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#error "Your compiler's equivalent of dllimport is unknown"
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#endif
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#endif
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#elif defined(__ANDROID__)
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#define KTX_API __attribute__((visibility("default")))
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#else
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#define KTX_API
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#endif
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#if defined(_WIN32) && !defined(KHRONOS_STATIC)
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#if !defined(KTX_APIENTRY)
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#define KTX_APIENTRY __stdcall
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#endif
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#else
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#define KTX_APIENTRY
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#endif
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/* To avoid including <KHR/khrplatform.h> define our own types. */
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typedef unsigned char ktx_uint8_t;
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typedef bool ktx_bool_t;
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#ifdef _MSC_VER
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typedef unsigned __int16 ktx_uint16_t;
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typedef signed __int16 ktx_int16_t;
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typedef unsigned __int32 ktx_uint32_t;
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typedef signed __int32 ktx_int32_t;
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typedef size_t ktx_size_t;
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typedef unsigned __int64 ktx_uint64_t;
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typedef signed __int64 ktx_int64_t;
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#else
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#include <stdint.h>
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typedef uint16_t ktx_uint16_t;
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typedef int16_t ktx_int16_t;
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typedef uint32_t ktx_uint32_t;
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typedef int32_t ktx_int32_t;
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typedef size_t ktx_size_t;
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typedef uint64_t ktx_uint64_t;
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typedef int64_t ktx_int64_t;
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#endif
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/* This will cause compilation to fail if size of uint32 != 4. */
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typedef unsigned char ktx_uint32_t_SIZE_ASSERT[sizeof(ktx_uint32_t) == 4];
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/*
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* This #if allows libktx to be compiled with strict c99. It avoids
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* compiler warnings or even errors when a gl.h is already included.
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* "Redefinition of (type) is a c11 feature". Obviously this doesn't help if
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* gl.h comes after. However nobody has complained about the unguarded typedefs
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* since they were introduced so this is unlikely to be a problem in practice.
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* Presumably everybody is using platform default compilers not c99 or else
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* they are using C++.
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*/
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#if !defined(GL_NO_ERROR)
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/*
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* To avoid having to including gl.h ...
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*/
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typedef unsigned char GLboolean;
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typedef unsigned int GLenum;
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typedef int GLint;
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typedef int GLsizei;
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typedef unsigned int GLuint;
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typedef unsigned char GLubyte;
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @~English
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* @brief Key string for standard writer metadata.
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*/
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#define KTX_ANIMDATA_KEY "KTXanimData"
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/**
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* @~English
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* @brief Key string for standard orientation metadata.
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*/
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#define KTX_ORIENTATION_KEY "KTXorientation"
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/**
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* @~English
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* @brief Key string for standard swizzle metadata.
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*/
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#define KTX_SWIZZLE_KEY "KTXswizzle"
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/**
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* @~English
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* @brief Key string for standard writer metadata.
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*/
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#define KTX_WRITER_KEY "KTXwriter"
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/**
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* @~English
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* @brief Key string for standard writer supercompression parameter metadata.
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*/
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#define KTX_WRITER_SCPARAMS_KEY "KTXwriterScParams"
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/**
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* @~English
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* @brief Standard KTX 1 format for 1D orientation value.
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*/
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#define KTX_ORIENTATION1_FMT "S=%c"
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/**
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* @~English
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* @brief Standard KTX 1 format for 2D orientation value.
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*/
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#define KTX_ORIENTATION2_FMT "S=%c,T=%c"
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/**
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* @~English
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* @brief Standard KTX 1 format for 3D orientation value.
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*/
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#define KTX_ORIENTATION3_FMT "S=%c,T=%c,R=%c"
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/**
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* @~English
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* @brief Required unpack alignment
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*/
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#define KTX_GL_UNPACK_ALIGNMENT 4
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#define KTX_FACESLICE_WHOLE_LEVEL UINT_MAX
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#define KTX_TRUE true
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#define KTX_FALSE false
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/**
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* @~English
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* @brief Error codes returned by library functions.
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*/
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typedef enum ktx_error_code_e {
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KTX_SUCCESS = 0, /*!< Operation was successful. */
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KTX_FILE_DATA_ERROR, /*!< The data in the file is inconsistent with the spec. */
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KTX_FILE_ISPIPE, /*!< The file is a pipe or named pipe. */
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KTX_FILE_OPEN_FAILED, /*!< The target file could not be opened. */
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KTX_FILE_OVERFLOW, /*!< The operation would exceed the max file size. */
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KTX_FILE_READ_ERROR, /*!< An error occurred while reading from the file. */
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KTX_FILE_SEEK_ERROR, /*!< An error occurred while seeking in the file. */
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KTX_FILE_UNEXPECTED_EOF, /*!< File does not have enough data to satisfy request. */
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KTX_FILE_WRITE_ERROR, /*!< An error occurred while writing to the file. */
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KTX_GL_ERROR, /*!< GL operations resulted in an error. */
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KTX_INVALID_OPERATION, /*!< The operation is not allowed in the current state. */
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KTX_INVALID_VALUE, /*!< A parameter value was not valid. */
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KTX_NOT_FOUND, /*!< Requested metadata key or required dynamically loaded GPU function was not found. */
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KTX_OUT_OF_MEMORY, /*!< Not enough memory to complete the operation. */
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KTX_TRANSCODE_FAILED, /*!< Transcoding of block compressed texture failed. */
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KTX_UNKNOWN_FILE_FORMAT, /*!< The file not a KTX file */
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KTX_UNSUPPORTED_TEXTURE_TYPE, /*!< The KTX file specifies an unsupported texture type. */
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KTX_UNSUPPORTED_FEATURE, /*!< Feature not included in in-use library or not yet implemented. */
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KTX_LIBRARY_NOT_LINKED, /*!< Library dependency (OpenGL or Vulkan) not linked into application. */
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KTX_DECOMPRESS_LENGTH_ERROR, /*!< Decompressed byte count does not match expected byte size */
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KTX_DECOMPRESS_CHECKSUM_ERROR, /*!< Checksum mismatch when decompressing */
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KTX_ERROR_MAX_ENUM = KTX_DECOMPRESS_CHECKSUM_ERROR /*!< For safety checks. */
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} ktx_error_code_e;
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/**
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* @deprecated
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* @~English
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* @brief For backward compatibility
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*/
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#define KTX_error_code ktx_error_code_e
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#define KTX_IDENTIFIER_REF { 0xAB, 0x4B, 0x54, 0x58, 0x20, 0x31, 0x31, 0xBB, 0x0D, 0x0A, 0x1A, 0x0A }
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#define KTX_ENDIAN_REF (0x04030201)
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#define KTX_ENDIAN_REF_REV (0x01020304)
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#define KTX_HEADER_SIZE (64)
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/**
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* @~English
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* @brief Result codes returned by library functions.
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*/
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typedef enum ktx_error_code_e ktxResult;
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/**
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* @class ktxHashList
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* @~English
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* @brief Opaque handle to a ktxHashList.
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*/
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typedef struct ktxKVListEntry* ktxHashList;
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typedef struct ktxStream ktxStream;
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#define KTX_APIENTRYP KTX_APIENTRY *
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/**
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* @class ktxHashListEntry
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* @~English
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* @brief Opaque handle to an entry in a @ref ktxHashList.
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*/
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typedef struct ktxKVListEntry ktxHashListEntry;
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typedef enum ktxOrientationX {
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KTX_ORIENT_X_LEFT = 'l', KTX_ORIENT_X_RIGHT = 'r'
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} ktxOrientationX;
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typedef enum ktxOrientationY {
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KTX_ORIENT_Y_UP = 'u', KTX_ORIENT_Y_DOWN = 'd'
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} ktxOrientationY;
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typedef enum ktxOrientationZ {
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KTX_ORIENT_Z_IN = 'i', KTX_ORIENT_Z_OUT = 'o'
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} ktxOrientationZ;
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typedef enum class_id {
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ktxTexture1_c = 1,
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ktxTexture2_c = 2
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} class_id;
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/**
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* @~English
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* @brief Struct describing the logical orientation of an image.
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*/
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struct ktxOrientation {
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ktxOrientationX x; /*!< Orientation in X */
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ktxOrientationY y; /*!< Orientation in Y */
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ktxOrientationZ z; /*!< Orientation in Z */
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};
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#define KTXTEXTURECLASSDEFN \
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class_id classId; \
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struct ktxTexture_vtbl* vtbl; \
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struct ktxTexture_vvtbl* vvtbl; \
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struct ktxTexture_protected* _protected; \
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ktx_bool_t isArray; \
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ktx_bool_t isCubemap; \
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ktx_bool_t isCompressed; \
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ktx_bool_t generateMipmaps; \
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ktx_uint32_t baseWidth; \
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ktx_uint32_t baseHeight; \
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ktx_uint32_t baseDepth; \
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ktx_uint32_t numDimensions; \
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ktx_uint32_t numLevels; \
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ktx_uint32_t numLayers; \
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ktx_uint32_t numFaces; \
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struct ktxOrientation orientation; \
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ktxHashList kvDataHead; \
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ktx_uint32_t kvDataLen; \
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ktx_uint8_t* kvData; \
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ktx_size_t dataSize; \
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ktx_uint8_t* pData;
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/**
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* @class ktxTexture
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* @~English
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* @brief Base class representing a texture.
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*
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* ktxTextures should be created only by one of the provided
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* functions and these fields should be considered read-only.
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*/
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typedef struct ktxTexture {
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KTXTEXTURECLASSDEFN
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} ktxTexture;
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/**
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* @typedef ktxTexture::classId
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* @~English
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* @brief Identify the class type.
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*
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* Since there are no public ktxTexture constructors, this can only have
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* values of ktxTexture1_c or ktxTexture2_c.
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*/
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/**
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* @typedef ktxTexture::vtbl
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* @~English
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* @brief Pointer to the class's vtble.
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*/
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/**
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* @typedef ktxTexture::vvtbl
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* @~English
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* @brief Pointer to the class's vtble for Vulkan functions.
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*
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* A separate vtble is used so this header does not need to include vulkan.h.
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*/
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/**
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* @typedef ktxTexture::_protected
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* @~English
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* @brief Opaque pointer to the class's protected variables.
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*/
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/**
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* @typedef ktxTexture::isArray
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* @~English
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*
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* KTX_TRUE if the texture is an array texture, i.e,
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* a GL_TEXTURE_*_ARRAY target is to be used.
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*/
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/**
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* @typedef ktxTexture::isCubemap
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* @~English
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*
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* KTX_TRUE if the texture is a cubemap or cubemap array.
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*/
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/**
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* @typedef ktxTexture::isCubemap
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* @~English
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*
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* KTX_TRUE if the texture's format is a block compressed format.
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*/
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/**
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* @typedef ktxTexture::generateMipmaps
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* @~English
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*
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* KTX_TRUE if mipmaps should be generated for the texture by
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* ktxTexture_GLUpload() or ktxTexture_VkUpload().
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*/
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/**n
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* @typedef ktxTexture::baseWidth
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* @~English
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* @brief Width of the texture's base level.
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*/
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/**
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* @typedef ktxTexture::baseHeight
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* @~English
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* @brief Height of the texture's base level.
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*/
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/**
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* @typedef ktxTexture::baseDepth
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* @~English
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* @brief Depth of the texture's base level.
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*/
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/**
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* @typedef ktxTexture::numDimensions
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* @~English
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* @brief Number of dimensions in the texture: 1, 2 or 3.
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*/
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/**
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* @typedef ktxTexture::numLevels
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* @~English
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* @brief Number of mip levels in the texture.
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*
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* Must be 1, if @c generateMipmaps is KTX_TRUE. Can be less than a
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* full pyramid but always starts at the base level.
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*/
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/**
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* @typedef ktxTexture::numLevels
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* @~English
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* @brief Number of array layers in the texture.
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*/
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/**
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* @typedef ktxTexture::numFaces
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* @~English
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* @brief Number of faces: 6 for cube maps, 1 otherwise.
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*/
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/**
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* @typedef ktxTexture::orientation
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* @~English
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* @brief Describes the logical orientation of the images in each dimension.
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*
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* ktxOrientationX for X, ktxOrientationY for Y and ktxOrientationZ for Z.
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*/
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/**
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* @typedef ktxTexture::kvDataHead
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* @~English
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* @brief Head of the hash list of metadata.
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*/
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/**
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* @typedef ktxTexture::kvDataLen
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* @~English
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* @brief Length of the metadata, if it has been extracted in its raw form,
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* otherwise 0.
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*/
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/**
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* @typedef ktxTexture::kvData
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* @~English
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* @brief Pointer to the metadata, if it has been extracted in its raw form,
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* otherwise NULL.
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*/
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/**
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* @typedef ktxTexture::dataSize
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* @~English
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* @brief Byte length of the texture's uncompressed image data.
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*/
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/**
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* @typedef ktxTexture::pData
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* @~English
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* @brief Pointer to the start of the image data.
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*/
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/**
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* @memberof ktxTexture
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* @~English
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* @brief Signature of function called by the <tt>ktxTexture_Iterate*</tt>
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* functions to receive image data.
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*
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* The function parameters are used to pass values which change for each image.
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* Obtain values which are uniform across all images from the @c ktxTexture
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* object.
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*
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* @param [in] miplevel MIP level from 0 to the max level which is
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* dependent on the texture size.
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* @param [in] face usually 0; for cube maps, one of the 6 cube
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* faces in the order +X, -X, +Y, -Y, +Z, -Z,
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* 0 to 5.
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* @param [in] width width of the image.
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* @param [in] height height of the image or, for 1D textures
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* textures, 1.
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* @param [in] depth depth of the image or, for 1D & 2D
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* textures, 1.
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* @param [in] faceLodSize number of bytes of data pointed at by
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* @p pixels.
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* @param [in] pixels pointer to the image data.
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* @param [in,out] userdata pointer for the application to pass data to and
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* from the callback function.
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*/
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typedef KTX_error_code
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(* PFNKTXITERCB)(int miplevel, int face,
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int width, int height, int depth,
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ktx_uint64_t faceLodSize,
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void* pixels, void* userdata);
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/* Don't use KTX_APIENTRYP to avoid a Doxygen bug. */
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typedef void (KTX_APIENTRY* PFNKTEXDESTROY)(ktxTexture* This);
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typedef KTX_error_code
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(KTX_APIENTRY* PFNKTEXGETIMAGEOFFSET)(ktxTexture* This, ktx_uint32_t level,
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ktx_uint32_t layer,
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ktx_uint32_t faceSlice,
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ktx_size_t* pOffset);
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typedef ktx_size_t
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(KTX_APIENTRY* PFNKTEXGETDATASIZEUNCOMPRESSED)(ktxTexture* This);
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typedef ktx_size_t
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(KTX_APIENTRY* PFNKTEXGETIMAGESIZE)(ktxTexture* This, ktx_uint32_t level);
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typedef KTX_error_code
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(KTX_APIENTRY* PFNKTEXITERATELEVELS)(ktxTexture* This, PFNKTXITERCB iterCb,
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void* userdata);
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typedef KTX_error_code
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(KTX_APIENTRY* PFNKTEXITERATELOADLEVELFACES)(ktxTexture* This,
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PFNKTXITERCB iterCb,
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void* userdata);
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typedef KTX_error_code
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(KTX_APIENTRY* PFNKTEXLOADIMAGEDATA)(ktxTexture* This,
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ktx_uint8_t* pBuffer,
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ktx_size_t bufSize);
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typedef ktx_bool_t
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(KTX_APIENTRY* PFNKTEXNEEDSTRANSCODING)(ktxTexture* This);
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typedef KTX_error_code
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(KTX_APIENTRY* PFNKTEXSETIMAGEFROMMEMORY)(ktxTexture* This,
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ktx_uint32_t level,
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ktx_uint32_t layer,
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ktx_uint32_t faceSlice,
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const ktx_uint8_t* src,
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ktx_size_t srcSize);
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typedef KTX_error_code
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(KTX_APIENTRY* PFNKTEXSETIMAGEFROMSTDIOSTREAM)(ktxTexture* This,
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ktx_uint32_t level,
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ktx_uint32_t layer,
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ktx_uint32_t faceSlice,
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FILE* src, ktx_size_t srcSize);
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typedef KTX_error_code
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(KTX_APIENTRY* PFNKTEXWRITETOSTDIOSTREAM)(ktxTexture* This, FILE* dstsstr);
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typedef KTX_error_code
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(KTX_APIENTRY* PFNKTEXWRITETONAMEDFILE)(ktxTexture* This,
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const char* const dstname);
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typedef KTX_error_code
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(KTX_APIENTRY* PFNKTEXWRITETOMEMORY)(ktxTexture* This,
|
|
ktx_uint8_t** bytes, ktx_size_t* size);
|
|
typedef KTX_error_code
|
|
(KTX_APIENTRY* PFNKTEXWRITETOSTREAM)(ktxTexture* This,
|
|
ktxStream* dststr);
|
|
|
|
/**
|
|
* @memberof ktxTexture
|
|
* @~English
|
|
* @brief Table of virtual ktxTexture methods.
|
|
*/
|
|
struct ktxTexture_vtbl {
|
|
PFNKTEXDESTROY Destroy;
|
|
PFNKTEXGETIMAGEOFFSET GetImageOffset;
|
|
PFNKTEXGETDATASIZEUNCOMPRESSED GetDataSizeUncompressed;
|
|
PFNKTEXGETIMAGESIZE GetImageSize;
|
|
PFNKTEXITERATELEVELS IterateLevels;
|
|
PFNKTEXITERATELOADLEVELFACES IterateLoadLevelFaces;
|
|
PFNKTEXNEEDSTRANSCODING NeedsTranscoding;
|
|
PFNKTEXLOADIMAGEDATA LoadImageData;
|
|
PFNKTEXSETIMAGEFROMMEMORY SetImageFromMemory;
|
|
PFNKTEXSETIMAGEFROMSTDIOSTREAM SetImageFromStdioStream;
|
|
PFNKTEXWRITETOSTDIOSTREAM WriteToStdioStream;
|
|
PFNKTEXWRITETONAMEDFILE WriteToNamedFile;
|
|
PFNKTEXWRITETOMEMORY WriteToMemory;
|
|
PFNKTEXWRITETOSTREAM WriteToStream;
|
|
};
|
|
|
|
/****************************************************************
|
|
* Macros to give some backward compatibility to the previous API
|
|
****************************************************************/
|
|
|
|
/**
|
|
* @~English
|
|
* @brief Helper for calling the Destroy virtual method of a ktxTexture.
|
|
* @copydoc ktxTexture2.ktxTexture2_Destroy
|
|
*/
|
|
#define ktxTexture_Destroy(This) (This)->vtbl->Destroy(This)
|
|
|
|
/**
|
|
* @~English
|
|
* @brief Helper for calling the GetImageOffset virtual method of a
|
|
* ktxTexture.
|
|
* @copydoc ktxTexture2.ktxTexture2_GetImageOffset
|
|
*/
|
|
#define ktxTexture_GetImageOffset(This, level, layer, faceSlice, pOffset) \
|
|
(This)->vtbl->GetImageOffset(This, level, layer, faceSlice, pOffset)
|
|
|
|
/**
|
|
* @~English
|
|
* @brief Helper for calling the GetDataSizeUncompressed virtual method of a ktxTexture.
|
|
*
|
|
* For a ktxTexture1 this will always return the value of This->dataSize.
|
|
*
|
|
* @copydetails ktxTexture2.ktxTexture2_GetDataSizeUncompressed
|
|
*/
|
|
#define ktxTexture_GetDataSizeUncompressed(This) \
|
|
(This)->vtbl->GetDataSizeUncompressed(This)
|
|
|
|
/**
|
|
* @~English
|
|
* @brief Helper for calling the GetImageSize virtual method of a ktxTexture.
|
|
* @copydoc ktxTexture2.ktxTexture2_GetImageSize
|
|
*/
|
|
#define ktxTexture_GetImageSize(This, level) \
|
|
(This)->vtbl->GetImageSize(This, level)
|
|
|
|
/**
|
|
* @~English
|
|
* @brief Helper for calling the IterateLevels virtual method of a ktxTexture.
|
|
* @copydoc ktxTexture2.ktxTexture2_IterateLevels
|
|
*/
|
|
#define ktxTexture_IterateLevels(This, iterCb, userdata) \
|
|
(This)->vtbl->IterateLevels(This, iterCb, userdata)
|
|
|
|
/**
|
|
* @~English
|
|
* @brief Helper for calling the IterateLoadLevelFaces virtual method of a
|
|
* ktxTexture.
|
|
* @copydoc ktxTexture2.ktxTexture2_IterateLoadLevelFaces
|
|
*/
|
|
#define ktxTexture_IterateLoadLevelFaces(This, iterCb, userdata) \
|
|
(This)->vtbl->IterateLoadLevelFaces(This, iterCb, userdata)
|
|
|
|
/**
|
|
* @~English
|
|
* @brief Helper for calling the LoadImageData virtual method of a ktxTexture.
|
|
* @copydoc ktxTexture2.ktxTexture2_LoadImageData
|
|
*/
|
|
#define ktxTexture_LoadImageData(This, pBuffer, bufSize) \
|
|
(This)->vtbl->LoadImageData(This, pBuffer, bufSize)
|
|
|
|
/**
|
|
* @~English
|
|
* @brief Helper for calling the NeedsTranscoding virtual method of a ktxTexture.
|
|
* @copydoc ktxTexture2.ktxTexture2_NeedsTranscoding
|
|
*/
|
|
#define ktxTexture_NeedsTranscoding(This) (This)->vtbl->NeedsTranscoding(This)
|
|
|
|
/**
|
|
* @~English
|
|
* @brief Helper for calling the SetImageFromMemory virtual method of a
|
|
* ktxTexture.
|
|
* @copydoc ktxTexture2.ktxTexture2_SetImageFromMemory
|
|
*/
|
|
#define ktxTexture_SetImageFromMemory(This, level, layer, faceSlice, \
|
|
src, srcSize) \
|
|
(This)->vtbl->SetImageFromMemory(This, level, layer, faceSlice, src, srcSize)
|
|
|
|
/**
|
|
* @~English
|
|
* @brief Helper for calling the SetImageFromStdioStream virtual method of a
|
|
* ktxTexture.
|
|
* @copydoc ktxTexture2.ktxTexture2_SetImageFromStdioStream
|
|
*/
|
|
#define ktxTexture_SetImageFromStdioStream(This, level, layer, faceSlice, \
|
|
src, srcSize) \
|
|
(This)->vtbl->SetImageFromStdioStream(This, level, layer, faceSlice, \
|
|
src, srcSize)
|
|
|
|
/**
|
|
* @~English
|
|
* @brief Helper for calling the WriteToStdioStream virtual method of a
|
|
* ktxTexture.
|
|
* @copydoc ktxTexture2.ktxTexture2_WriteToStdioStream
|
|
*/
|
|
#define ktxTexture_WriteToStdioStream(This, dstsstr) \
|
|
(This)->vtbl->WriteToStdioStream(This, dstsstr)
|
|
|
|
/**
|
|
* @~English
|
|
* @brief Helper for calling the WriteToNamedfile virtual method of a
|
|
* ktxTexture.
|
|
* @copydoc ktxTexture2.ktxTexture2_WriteToNamedFile
|
|
*/
|
|
#define ktxTexture_WriteToNamedFile(This, dstname) \
|
|
(This)->vtbl->WriteToNamedFile(This, dstname)
|
|
|
|
/**
|
|
* @~English
|
|
* @brief Helper for calling the WriteToMemory virtual method of a ktxTexture.
|
|
* @copydoc ktxTexture2.ktxTexture2_WriteToMemory
|
|
*/
|
|
#define ktxTexture_WriteToMemory(This, ppDstBytes, pSize) \
|
|
(This)->vtbl->WriteToMemory(This, ppDstBytes, pSize)
|
|
|
|
/**
|
|
* @~English
|
|
* @brief Helper for calling the WriteToStream virtual method of a ktxTexture.
|
|
* @copydoc ktxTexture2.ktxTexture2_WriteToStream
|
|
*/
|
|
#define ktxTexture_WriteToStream(This, dststr) \
|
|
(This)->vtbl->WriteToStream(This, dststr)
|
|
|
|
|
|
/**
|
|
* @class ktxTexture1
|
|
* @~English
|
|
* @brief Class representing a KTX version 1 format texture.
|
|
*
|
|
* ktxTextures should be created only by one of the ktxTexture_Create*
|
|
* functions and these fields should be considered read-only.
|
|
*/
|
|
typedef struct ktxTexture1 {
|
|
KTXTEXTURECLASSDEFN
|
|
ktx_uint32_t glFormat; /*!< Format of the texture data, e.g., GL_RGB. */
|
|
ktx_uint32_t glInternalformat; /*!< Internal format of the texture data,
|
|
e.g., GL_RGB8. */
|
|
ktx_uint32_t glBaseInternalformat; /*!< Base format of the texture data,
|
|
e.g., GL_RGB. */
|
|
ktx_uint32_t glType; /*!< Type of the texture data, e.g, GL_UNSIGNED_BYTE.*/
|
|
struct ktxTexture1_private* _private; /*!< Private data. */
|
|
} ktxTexture1;
|
|
|
|
/*===========================================================*
|
|
* KTX format version 2 *
|
|
*===========================================================*/
|
|
|
|
/**
|
|
* @~English
|
|
* @brief Enumerators identifying the supercompression scheme.
|
|
*/
|
|
typedef enum ktxSupercmpScheme {
|
|
KTX_SS_NONE = 0, /*!< No supercompression. */
|
|
KTX_SS_BASIS_LZ = 1, /*!< Basis LZ supercompression. */
|
|
KTX_SS_ZSTD = 2, /*!< ZStd supercompression. */
|
|
KTX_SS_ZLIB = 3, /*!< ZLIB supercompression. */
|
|
KTX_SS_BEGIN_RANGE = KTX_SS_NONE,
|
|
KTX_SS_END_RANGE = KTX_SS_ZLIB,
|
|
KTX_SS_BEGIN_VENDOR_RANGE = 0x10000,
|
|
KTX_SS_END_VENDOR_RANGE = 0x1ffff,
|
|
KTX_SS_BEGIN_RESERVED = 0x20000,
|
|
KTX_SUPERCOMPRESSION_BASIS = KTX_SS_BASIS_LZ,
|
|
/*!< @deprecated Will be removed before v4 release. Use KTX_SS_BASIS_LZ instead. */
|
|
KTX_SUPERCOMPRESSION_ZSTD = KTX_SS_ZSTD
|
|
/*!< @deprecated Will be removed before v4 release. Use KTX_SS_ZSTD instead. */
|
|
} ktxSupercmpScheme;
|
|
|
|
/**
|
|
* @class ktxTexture2
|
|
* @~English
|
|
* @brief Class representing a KTX version 2 format texture.
|
|
*
|
|
* ktxTextures should be created only by one of the ktxTexture_Create*
|
|
* functions and these fields should be considered read-only.
|
|
*/
|
|
typedef struct ktxTexture2 {
|
|
KTXTEXTURECLASSDEFN
|
|
ktx_uint32_t vkFormat;
|
|
ktx_uint32_t* pDfd;
|
|
ktxSupercmpScheme supercompressionScheme;
|
|
ktx_bool_t isVideo;
|
|
ktx_uint32_t duration;
|
|
ktx_uint32_t timescale;
|
|
ktx_uint32_t loopcount;
|
|
struct ktxTexture2_private* _private; /*!< Private data. */
|
|
} ktxTexture2;
|
|
|
|
/**
|
|
* @brief Helper for casting ktxTexture1 and ktxTexture2 to ktxTexture.
|
|
*
|
|
* Use with caution.
|
|
*/
|
|
#define ktxTexture(t) ((ktxTexture*)t)
|
|
|
|
/**
|
|
* @memberof ktxTexture
|
|
* @~English
|
|
* @brief Structure for passing texture information to ktxTexture1\_Create() and
|
|
* ktxTexture2\_Create().
|
|
*
|
|
* @sa @ref ktxTexture1::ktxTexture1\_Create() "ktxTexture1_Create()"
|
|
* @sa @ref ktxTexture2::ktxTexture2\_Create() "ktxTexture2_Create()"
|
|
*/
|
|
typedef struct
|
|
{
|
|
ktx_uint32_t glInternalformat; /*!< Internal format for the texture, e.g.,
|
|
GL_RGB8. Ignored when creating a
|
|
ktxTexture2. */
|
|
ktx_uint32_t vkFormat; /*!< VkFormat for texture. Ignored when creating a
|
|
ktxTexture1. */
|
|
ktx_uint32_t* pDfd; /*!< Pointer to DFD. Used only when creating a
|
|
ktxTexture2 and only if vkFormat is
|
|
VK_FORMAT_UNDEFINED. */
|
|
ktx_uint32_t baseWidth; /*!< Width of the base level of the texture. */
|
|
ktx_uint32_t baseHeight; /*!< Height of the base level of the texture. */
|
|
ktx_uint32_t baseDepth; /*!< Depth of the base level of the texture. */
|
|
ktx_uint32_t numDimensions; /*!< Number of dimensions in the texture, 1, 2
|
|
or 3. */
|
|
ktx_uint32_t numLevels; /*!< Number of mip levels in the texture. Should be
|
|
1 if @c generateMipmaps is KTX_TRUE; */
|
|
ktx_uint32_t numLayers; /*!< Number of array layers in the texture. */
|
|
ktx_uint32_t numFaces; /*!< Number of faces: 6 for cube maps, 1 otherwise. */
|
|
ktx_bool_t isArray; /*!< Set to KTX_TRUE if the texture is to be an
|
|
array texture. Means OpenGL will use a
|
|
GL_TEXTURE_*_ARRAY target. */
|
|
ktx_bool_t generateMipmaps; /*!< Set to KTX_TRUE if mipmaps should be
|
|
generated for the texture when loading
|
|
into a 3D API. */
|
|
} ktxTextureCreateInfo;
|
|
|
|
/**
|
|
* @memberof ktxTexture
|
|
* @~English
|
|
* @brief Enum for requesting, or not, allocation of storage for images.
|
|
*
|
|
* @sa ktxTexture1_Create() and ktxTexture2_Create().
|
|
*/
|
|
typedef enum {
|
|
KTX_TEXTURE_CREATE_NO_STORAGE = 0, /*!< Don't allocate any image storage. */
|
|
KTX_TEXTURE_CREATE_ALLOC_STORAGE = 1 /*!< Allocate image storage. */
|
|
} ktxTextureCreateStorageEnum;
|
|
|
|
/**
|
|
* @memberof ktxTexture
|
|
* @~English
|
|
* @brief Flags for requesting services during creation.
|
|
*
|
|
* @sa ktxTexture_CreateFrom*
|
|
*/
|
|
enum ktxTextureCreateFlagBits {
|
|
KTX_TEXTURE_CREATE_NO_FLAGS = 0x00,
|
|
KTX_TEXTURE_CREATE_LOAD_IMAGE_DATA_BIT = 0x01,
|
|
/*!< Load the images from the KTX source. */
|
|
KTX_TEXTURE_CREATE_RAW_KVDATA_BIT = 0x02,
|
|
/*!< Load the raw key-value data instead of
|
|
creating a @c ktxHashList from it. */
|
|
KTX_TEXTURE_CREATE_SKIP_KVDATA_BIT = 0x04,
|
|
/*!< Skip any key-value data. This overrides
|
|
the RAW_KVDATA_BIT. */
|
|
KTX_TEXTURE_CREATE_CHECK_GLTF_BASISU_BIT = 0x08
|
|
/*!< Load texture compatible with the rules
|
|
of KHR_texture_basisu glTF extension */
|
|
};
|
|
/**
|
|
* @memberof ktxTexture
|
|
* @~English
|
|
* @brief Type for TextureCreateFlags parameters.
|
|
*
|
|
* @sa ktxTexture_CreateFrom*()
|
|
*/
|
|
typedef ktx_uint32_t ktxTextureCreateFlags;
|
|
|
|
/*===========================================================*
|
|
* ktxStream
|
|
*===========================================================*/
|
|
|
|
/*
|
|
* This is unsigned to allow ktxmemstreams to use the
|
|
* full amount of memory available. Platforms will
|
|
* limit the size of ktxfilestreams to, e.g, MAX_LONG
|
|
* on 32-bit and ktxfilestreams raises errors if
|
|
* offset values exceed the limits. This choice may
|
|
* need to be revisited if we ever start needing -ve
|
|
* offsets.
|
|
*
|
|
* Should the 2GB file size handling limit on 32-bit
|
|
* platforms become a problem, ktxfilestream will have
|
|
* to be changed to explicitly handle large files by
|
|
* using the 64-bit stream functions.
|
|
*/
|
|
#if defined(_MSC_VER) && defined(_WIN64)
|
|
typedef unsigned __int64 ktx_off_t;
|
|
#else
|
|
typedef off_t ktx_off_t;
|
|
#endif
|
|
typedef struct ktxMem ktxMem;
|
|
typedef struct ktxStream ktxStream;
|
|
|
|
enum streamType { eStreamTypeFile = 1, eStreamTypeMemory = 2, eStreamTypeCustom = 3 };
|
|
|
|
/**
|
|
* @~English
|
|
* @brief type for a pointer to a stream reading function
|
|
*/
|
|
typedef KTX_error_code (*ktxStream_read)(ktxStream* str, void* dst,
|
|
const ktx_size_t count);
|
|
/**
|
|
* @~English
|
|
* @brief type for a pointer to a stream skipping function
|
|
*/
|
|
typedef KTX_error_code (*ktxStream_skip)(ktxStream* str,
|
|
const ktx_size_t count);
|
|
|
|
/**
|
|
* @~English
|
|
* @brief type for a pointer to a stream writing function
|
|
*/
|
|
typedef KTX_error_code (*ktxStream_write)(ktxStream* str, const void *src,
|
|
const ktx_size_t size,
|
|
const ktx_size_t count);
|
|
|
|
/**
|
|
* @~English
|
|
* @brief type for a pointer to a stream position query function
|
|
*/
|
|
typedef KTX_error_code (*ktxStream_getpos)(ktxStream* str, ktx_off_t* const offset);
|
|
|
|
/**
|
|
* @~English
|
|
* @brief type for a pointer to a stream position query function
|
|
*/
|
|
typedef KTX_error_code (*ktxStream_setpos)(ktxStream* str, const ktx_off_t offset);
|
|
|
|
/**
|
|
* @~English
|
|
* @brief type for a pointer to a stream size query function
|
|
*/
|
|
typedef KTX_error_code (*ktxStream_getsize)(ktxStream* str, ktx_size_t* const size);
|
|
|
|
/**
|
|
* @~English
|
|
* @brief Destruct a stream
|
|
*/
|
|
typedef void (*ktxStream_destruct)(ktxStream* str);
|
|
|
|
/**
|
|
* @~English
|
|
*
|
|
* @brief Interface of ktxStream.
|
|
*
|
|
* @author Maksim Kolesin
|
|
* @author Georg Kolling, Imagination Technology
|
|
* @author Mark Callow, HI Corporation
|
|
*/
|
|
struct ktxStream
|
|
{
|
|
ktxStream_read read; /*!< pointer to function for reading bytes. */
|
|
ktxStream_skip skip; /*!< pointer to function for skipping bytes. */
|
|
ktxStream_write write; /*!< pointer to function for writing bytes. */
|
|
ktxStream_getpos getpos; /*!< pointer to function for getting current position in stream. */
|
|
ktxStream_setpos setpos; /*!< pointer to function for setting current position in stream. */
|
|
ktxStream_getsize getsize; /*!< pointer to function for querying size. */
|
|
ktxStream_destruct destruct; /*!< destruct the stream. */
|
|
|
|
enum streamType type;
|
|
union {
|
|
FILE* file; /**< a stdio FILE pointer for a ktxFileStream. */
|
|
ktxMem* mem; /**< a pointer to a ktxMem struct for a ktxMemStream. */
|
|
struct
|
|
{
|
|
void* address; /**< pointer to the data. */
|
|
void* allocatorAddress; /**< pointer to a memory allocator. */
|
|
ktx_size_t size; /**< size of the data. */
|
|
} custom_ptr; /**< pointer to a struct for custom streams. */
|
|
} data; /**< pointer to the stream data. */
|
|
ktx_off_t readpos; /**< used by FileStream for stdin. */
|
|
ktx_bool_t closeOnDestruct; /**< Close FILE* or dispose of memory on destruct. */
|
|
};
|
|
|
|
/*
|
|
* See the implementation files for the full documentation of the following
|
|
* functions.
|
|
*/
|
|
|
|
/*
|
|
* These four create a ktxTexture1 or ktxTexture2 according to the data
|
|
* header, and return a pointer to the base ktxTexture class.
|
|
*/
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture_CreateFromStdioStream(FILE* stdioStream,
|
|
ktxTextureCreateFlags createFlags,
|
|
ktxTexture** newTex);
|
|
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture_CreateFromNamedFile(const char* const filename,
|
|
ktxTextureCreateFlags createFlags,
|
|
ktxTexture** newTex);
|
|
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture_CreateFromMemory(const ktx_uint8_t* bytes, ktx_size_t size,
|
|
ktxTextureCreateFlags createFlags,
|
|
ktxTexture** newTex);
|
|
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture_CreateFromStream(ktxStream* stream,
|
|
ktxTextureCreateFlags createFlags,
|
|
ktxTexture** newTex);
|
|
|
|
/*
|
|
* Returns a pointer to the image data of a ktxTexture object.
|
|
*/
|
|
KTX_API ktx_uint8_t* KTX_APIENTRY
|
|
ktxTexture_GetData(ktxTexture* This);
|
|
|
|
/*
|
|
* Returns the pitch of a row of an image at the specified level.
|
|
* Similar to the rowPitch in a VkSubResourceLayout.
|
|
*/
|
|
KTX_API ktx_uint32_t KTX_APIENTRY
|
|
ktxTexture_GetRowPitch(ktxTexture* This, ktx_uint32_t level);
|
|
|
|
/*
|
|
* Return the element size of the texture's images.
|
|
*/
|
|
KTX_API ktx_uint32_t KTX_APIENTRY
|
|
ktxTexture_GetElementSize(ktxTexture* This);
|
|
|
|
/*
|
|
* Returns the size of all the image data of a ktxTexture object in bytes.
|
|
*/
|
|
KTX_API ktx_size_t KTX_APIENTRY
|
|
ktxTexture_GetDataSize(ktxTexture* This);
|
|
|
|
/* Uploads a texture to OpenGL {,ES}. */
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture_GLUpload(ktxTexture* This, GLuint* pTexture, GLenum* pTarget,
|
|
GLenum* pGlerror);
|
|
|
|
/*
|
|
* Iterate over the levels or faces in a ktxTexture object.
|
|
*/
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture_IterateLevelFaces(ktxTexture* This, PFNKTXITERCB iterCb,
|
|
void* userdata);
|
|
/*
|
|
* Create a new ktxTexture1.
|
|
*/
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture1_Create(ktxTextureCreateInfo* createInfo,
|
|
ktxTextureCreateStorageEnum storageAllocation,
|
|
ktxTexture1** newTex);
|
|
|
|
/*
|
|
* These four create a ktxTexture1 provided the data is in KTX format.
|
|
*/
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture1_CreateFromStdioStream(FILE* stdioStream,
|
|
ktxTextureCreateFlags createFlags,
|
|
ktxTexture1** newTex);
|
|
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture1_CreateFromNamedFile(const char* const filename,
|
|
ktxTextureCreateFlags createFlags,
|
|
ktxTexture1** newTex);
|
|
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture1_CreateFromMemory(const ktx_uint8_t* bytes, ktx_size_t size,
|
|
ktxTextureCreateFlags createFlags,
|
|
ktxTexture1** newTex);
|
|
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture1_CreateFromStream(ktxStream* stream,
|
|
ktxTextureCreateFlags createFlags,
|
|
ktxTexture1** newTex);
|
|
|
|
KTX_API ktx_bool_t KTX_APIENTRY
|
|
ktxTexture1_NeedsTranscoding(ktxTexture1* This);
|
|
|
|
/*
|
|
* Write a ktxTexture object to a stdio stream in KTX format.
|
|
*/
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture1_WriteKTX2ToStdioStream(ktxTexture1* This, FILE* dstsstr);
|
|
|
|
/*
|
|
* Write a ktxTexture object to a named file in KTX format.
|
|
*/
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture1_WriteKTX2ToNamedFile(ktxTexture1* This, const char* const dstname);
|
|
|
|
/*
|
|
* Write a ktxTexture object to a block of memory in KTX format.
|
|
*/
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture1_WriteKTX2ToMemory(ktxTexture1* This,
|
|
ktx_uint8_t** bytes, ktx_size_t* size);
|
|
|
|
/*
|
|
* Write a ktxTexture object to a ktxStream in KTX format.
|
|
*/
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture1_WriteKTX2ToStream(ktxTexture1* This, ktxStream *dststr);
|
|
|
|
/*
|
|
* Create a new ktxTexture2.
|
|
*/
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture2_Create(ktxTextureCreateInfo* createInfo,
|
|
ktxTextureCreateStorageEnum storageAllocation,
|
|
ktxTexture2** newTex);
|
|
|
|
/*
|
|
* Create a new ktxTexture2 as a copy of an existing texture.
|
|
*/
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture2_CreateCopy(ktxTexture2* orig, ktxTexture2** newTex);
|
|
|
|
/*
|
|
* These four create a ktxTexture2 provided the data is in KTX2 format.
|
|
*/
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture2_CreateFromStdioStream(FILE* stdioStream,
|
|
ktxTextureCreateFlags createFlags,
|
|
ktxTexture2** newTex);
|
|
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture2_CreateFromNamedFile(const char* const filename,
|
|
ktxTextureCreateFlags createFlags,
|
|
ktxTexture2** newTex);
|
|
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture2_CreateFromMemory(const ktx_uint8_t* bytes, ktx_size_t size,
|
|
ktxTextureCreateFlags createFlags,
|
|
ktxTexture2** newTex);
|
|
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture2_CreateFromStream(ktxStream* stream,
|
|
ktxTextureCreateFlags createFlags,
|
|
ktxTexture2** newTex);
|
|
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture2_CompressBasis(ktxTexture2* This, ktx_uint32_t quality);
|
|
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture2_DeflateZstd(ktxTexture2* This, ktx_uint32_t level);
|
|
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture2_DeflateZLIB(ktxTexture2* This, ktx_uint32_t level);
|
|
|
|
KTX_API void KTX_APIENTRY
|
|
ktxTexture2_GetComponentInfo(ktxTexture2* This, ktx_uint32_t* numComponents,
|
|
ktx_uint32_t* componentByteLength);
|
|
|
|
KTX_API ktx_uint32_t KTX_APIENTRY
|
|
ktxTexture2_GetNumComponents(ktxTexture2* This);
|
|
|
|
KTX_API khr_df_transfer_e KTX_APIENTRY
|
|
ktxTexture2_GetOETF_e(ktxTexture2* This);
|
|
|
|
// For backward compatibility
|
|
KTX_API ktx_uint32_t KTX_APIENTRY
|
|
ktxTexture2_GetOETF(ktxTexture2* This);
|
|
|
|
KTX_API khr_df_model_e KTX_APIENTRY
|
|
ktxTexture2_GetColorModel_e(ktxTexture2* This);
|
|
|
|
KTX_API ktx_bool_t KTX_APIENTRY
|
|
ktxTexture2_GetPremultipliedAlpha(ktxTexture2* This);
|
|
|
|
KTX_API ktx_bool_t KTX_APIENTRY
|
|
ktxTexture2_NeedsTranscoding(ktxTexture2* This);
|
|
|
|
/**
|
|
* @~English
|
|
* @brief Flags specifiying UASTC encoding options.
|
|
*/
|
|
typedef enum ktx_pack_uastc_flag_bits_e {
|
|
KTX_PACK_UASTC_LEVEL_FASTEST = 0,
|
|
/*!< Fastest compression. 43.45dB. */
|
|
KTX_PACK_UASTC_LEVEL_FASTER = 1,
|
|
/*!< Faster compression. 46.49dB. */
|
|
KTX_PACK_UASTC_LEVEL_DEFAULT = 2,
|
|
/*!< Default compression. 47.47dB. */
|
|
KTX_PACK_UASTC_LEVEL_SLOWER = 3,
|
|
/*!< Slower compression. 48.01dB. */
|
|
KTX_PACK_UASTC_LEVEL_VERYSLOW = 4,
|
|
/*!< Very slow compression. 48.24dB. */
|
|
KTX_PACK_UASTC_MAX_LEVEL = KTX_PACK_UASTC_LEVEL_VERYSLOW,
|
|
/*!< Maximum supported quality level. */
|
|
KTX_PACK_UASTC_LEVEL_MASK = 0xF,
|
|
/*!< Mask to extract the level from the other bits. */
|
|
KTX_PACK_UASTC_FAVOR_UASTC_ERROR = 8,
|
|
/*!< Optimize for lowest UASTC error. */
|
|
KTX_PACK_UASTC_FAVOR_BC7_ERROR = 16,
|
|
/*!< Optimize for lowest BC7 error. */
|
|
KTX_PACK_UASTC_ETC1_FASTER_HINTS = 64,
|
|
/*!< Optimize for faster transcoding to ETC1. */
|
|
KTX_PACK_UASTC_ETC1_FASTEST_HINTS = 128,
|
|
/*!< Optimize for fastest transcoding to ETC1. */
|
|
KTX_PACK_UASTC__ETC1_DISABLE_FLIP_AND_INDIVIDUAL = 256
|
|
/*!< Not documented in BasisU code. */
|
|
} ktx_pack_uastc_flag_bits_e;
|
|
typedef ktx_uint32_t ktx_pack_uastc_flags;
|
|
|
|
/**
|
|
* @~English
|
|
* @brief Options specifiying ASTC encoding quality levels.
|
|
*/
|
|
typedef enum ktx_pack_astc_quality_levels_e {
|
|
KTX_PACK_ASTC_QUALITY_LEVEL_FASTEST = 0,
|
|
/*!< Fastest compression. */
|
|
KTX_PACK_ASTC_QUALITY_LEVEL_FAST = 10,
|
|
/*!< Fast compression. */
|
|
KTX_PACK_ASTC_QUALITY_LEVEL_MEDIUM = 60,
|
|
/*!< Medium compression. */
|
|
KTX_PACK_ASTC_QUALITY_LEVEL_THOROUGH = 98,
|
|
/*!< Slower compression. */
|
|
KTX_PACK_ASTC_QUALITY_LEVEL_EXHAUSTIVE = 100,
|
|
/*!< Very slow compression. */
|
|
KTX_PACK_ASTC_QUALITY_LEVEL_MAX = KTX_PACK_ASTC_QUALITY_LEVEL_EXHAUSTIVE,
|
|
/*!< Maximum supported quality level. */
|
|
} ktx_pack_astc_quality_levels_e;
|
|
|
|
/**
|
|
* @~English
|
|
* @brief Options specifiying ASTC encoding block dimensions
|
|
*/
|
|
typedef enum ktx_pack_astc_block_dimension_e {
|
|
// 2D formats
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_4x4, //: 8.00 bpp
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_5x4, //: 6.40 bpp
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_5x5, //: 5.12 bpp
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_6x5, //: 4.27 bpp
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_6x6, //: 3.56 bpp
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_8x5, //: 3.20 bpp
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_8x6, //: 2.67 bpp
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_10x5, //: 2.56 bpp
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_10x6, //: 2.13 bpp
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_8x8, //: 2.00 bpp
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_10x8, //: 1.60 bpp
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_10x10, //: 1.28 bpp
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_12x10, //: 1.07 bpp
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_12x12, //: 0.89 bpp
|
|
// 3D formats
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_3x3x3, //: 4.74 bpp
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_4x3x3, //: 3.56 bpp
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_4x4x3, //: 2.67 bpp
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_4x4x4, //: 2.00 bpp
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_5x4x4, //: 1.60 bpp
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_5x5x4, //: 1.28 bpp
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_5x5x5, //: 1.02 bpp
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_6x5x5, //: 0.85 bpp
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_6x6x5, //: 0.71 bpp
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_6x6x6, //: 0.59 bpp
|
|
KTX_PACK_ASTC_BLOCK_DIMENSION_MAX = KTX_PACK_ASTC_BLOCK_DIMENSION_6x6x6
|
|
/*!< Maximum supported blocks. */
|
|
} ktx_pack_astc_block_dimension_e;
|
|
|
|
/**
|
|
* @~English
|
|
* @brief Options specifying ASTC encoder profile mode
|
|
* This and function is used later to derive the profile.
|
|
*/
|
|
typedef enum ktx_pack_astc_encoder_mode_e {
|
|
KTX_PACK_ASTC_ENCODER_MODE_DEFAULT,
|
|
KTX_PACK_ASTC_ENCODER_MODE_LDR,
|
|
KTX_PACK_ASTC_ENCODER_MODE_HDR,
|
|
KTX_PACK_ASTC_ENCODER_MODE_MAX = KTX_PACK_ASTC_ENCODER_MODE_HDR
|
|
} ktx_pack_astc_encoder_mode_e;
|
|
|
|
extern KTX_API const ktx_uint32_t KTX_ETC1S_DEFAULT_COMPRESSION_LEVEL;
|
|
|
|
/**
|
|
* @memberof ktxTexture
|
|
* @~English
|
|
* @brief Structure for passing extended parameters to
|
|
* ktxTexture_CompressAstc.
|
|
*
|
|
* Passing a struct initialized to 0 (e.g. " = {0};") will use blockDimension
|
|
* 4x4, mode LDR and qualityLevel FASTEST. Setting qualityLevel to
|
|
* KTX_PACK_ASTC_QUALITY_LEVEL_MEDIUM is recommended.
|
|
*/
|
|
typedef struct ktxAstcParams {
|
|
ktx_uint32_t structSize;
|
|
/*!< Size of this struct. Used so library can tell which version
|
|
of struct is being passed.
|
|
*/
|
|
|
|
ktx_bool_t verbose;
|
|
/*!< If true, prints Astc encoder operation details to
|
|
@c stdout. Not recommended for GUI apps.
|
|
*/
|
|
|
|
ktx_uint32_t threadCount;
|
|
/*!< Number of threads used for compression. Default is 1.
|
|
*/
|
|
|
|
/* astcenc params */
|
|
ktx_uint32_t blockDimension;
|
|
/*!< Combinations of block dimensions that astcenc supports
|
|
i.e. 6x6, 8x8, 6x5 etc
|
|
*/
|
|
|
|
ktx_uint32_t mode;
|
|
/*!< Can be {ldr/hdr} from astcenc
|
|
*/
|
|
|
|
ktx_uint32_t qualityLevel;
|
|
/*!< astcenc supports -fastest, -fast, -medium, -thorough, -exhaustive
|
|
*/
|
|
|
|
ktx_bool_t normalMap;
|
|
/*!< Tunes codec parameters for better quality on normal maps
|
|
In this mode normals are compressed to X,Y components
|
|
Discarding Z component, reader will need to generate Z
|
|
component in shaders.
|
|
*/
|
|
|
|
ktx_bool_t perceptual;
|
|
/*!< The codec should optimize for perceptual error, instead of direct
|
|
RMS error. This aims to improves perceived image quality, but
|
|
typically lowers the measured PSNR score. Perceptual methods are
|
|
currently only available for normal maps and RGB color data.
|
|
*/
|
|
|
|
char inputSwizzle[4];
|
|
/*!< A swizzle to provide as input to astcenc. It must match the regular
|
|
expression /^[rgba01]{4}$/.
|
|
*/
|
|
} ktxAstcParams;
|
|
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture2_CompressAstcEx(ktxTexture2* This, ktxAstcParams* params);
|
|
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture2_CompressAstc(ktxTexture2* This, ktx_uint32_t quality);
|
|
|
|
/**
|
|
* @memberof ktxTexture2
|
|
* @~English
|
|
* @brief Structure for passing extended parameters to
|
|
* ktxTexture2_CompressBasisEx().
|
|
*
|
|
* If you only want default values, use ktxTexture2_CompressBasis(). Here, at a minimum you
|
|
* must initialize the structure as follows:
|
|
* @code
|
|
* ktxBasisParams params = {0};
|
|
* params.structSize = sizeof(params);
|
|
* params.compressionLevel = KTX_ETC1S_DEFAULT_COMPRESSION_LEVEL;
|
|
* @endcode
|
|
*
|
|
* @e compressionLevel has to be explicitly set because 0 is a valid @e compressionLevel
|
|
* but is not the default used by the BasisU encoder when no value is set. Only the other
|
|
* settings that are to be non-default must be non-zero.
|
|
*/
|
|
typedef struct ktxBasisParams {
|
|
ktx_uint32_t structSize;
|
|
/*!< Size of this struct. Used so library can tell which version
|
|
of struct is being passed.
|
|
*/
|
|
ktx_bool_t uastc;
|
|
/*!< True to use UASTC base, false to use ETC1S base. */
|
|
ktx_bool_t verbose;
|
|
/*!< If true, prints Basis Universal encoder operation details to
|
|
@c stdout. Not recommended for GUI apps.
|
|
*/
|
|
ktx_bool_t noSSE;
|
|
/*!< True to forbid use of the SSE instruction set. Ignored if CPU
|
|
does not support SSE. */
|
|
ktx_uint32_t threadCount;
|
|
/*!< Number of threads used for compression. Default is 1. */
|
|
|
|
/* ETC1S params */
|
|
|
|
ktx_uint32_t compressionLevel;
|
|
/*!< Encoding speed vs. quality tradeoff. Range is [0,5]. Higher values
|
|
are slower, but give higher quality. There is no default. Callers
|
|
must explicitly set this value. Callers can use
|
|
KTX_ETC1S_DEFAULT_COMPRESSION_LEVEL as a default value.
|
|
Currently this is 2.
|
|
*/
|
|
ktx_uint32_t qualityLevel;
|
|
/*!< Compression quality. Range is [1,255]. Lower gives better
|
|
compression/lower quality/faster. Higher gives less compression
|
|
/higher quality/slower. This automatically determines values for
|
|
@c maxEndpoints, @c maxSelectors,
|
|
@c endpointRDOThreshold and @c selectorRDOThreshold
|
|
for the target quality level. Setting these parameters overrides
|
|
the values determined by @c qualityLevel which defaults to
|
|
128 if neither it nor both of @c maxEndpoints and
|
|
@c maxSelectors have been set.
|
|
@note @e Both of @c maxEndpoints and @c maxSelectors
|
|
must be set for them to have any effect.
|
|
@note qualityLevel will only determine values for
|
|
@c endpointRDOThreshold and @c selectorRDOThreshold
|
|
when its value exceeds 128, otherwise their defaults will be used.
|
|
*/
|
|
ktx_uint32_t maxEndpoints;
|
|
/*!< Manually set the max number of color endpoint clusters.
|
|
Range is [1,16128]. Default is 0, unset. If this is set, maxSelectors
|
|
must also be set, otherwise the value will be ignored.
|
|
*/
|
|
float endpointRDOThreshold;
|
|
/*!< Set endpoint RDO quality threshold. The default is 1.25. Lower is
|
|
higher quality but less quality per output bit (try [1.0,3.0].
|
|
This will override the value chosen by @c qualityLevel.
|
|
*/
|
|
ktx_uint32_t maxSelectors;
|
|
/*!< Manually set the max number of color selector clusters. Range
|
|
is [1,16128]. Default is 0, unset. If this is set, maxEndpoints
|
|
must also be set, otherwise the value will be ignored.
|
|
*/
|
|
float selectorRDOThreshold;
|
|
/*!< Set selector RDO quality threshold. The default is 1.5. Lower is
|
|
higher quality but less quality per output bit (try [1.0,3.0]).
|
|
This will override the value chosen by @c qualityLevel.
|
|
*/
|
|
char inputSwizzle[4];
|
|
/*!< A swizzle to apply before encoding. It must match the regular
|
|
expression /^[rgba01]{4}$/. If both this and preSwizzle
|
|
are specified ktxTexture_CompressBasisEx will raise
|
|
KTX_INVALID_OPERATION.
|
|
*/
|
|
ktx_bool_t normalMap;
|
|
/*!< Tunes codec parameters for better quality on normal maps (no
|
|
selector RDO, no endpoint RDO) and sets the texture's DFD appropriately.
|
|
Only valid for linear textures.
|
|
*/
|
|
ktx_bool_t separateRGToRGB_A;
|
|
/*!< @deprecated. This was and is a no-op. 2-component inputs have always been
|
|
automatically separated using an "rrrg" inputSwizzle. @sa inputSwizzle and normalMode.
|
|
*/
|
|
ktx_bool_t preSwizzle;
|
|
/*!< If the texture has @c KTXswizzle metadata, apply it before
|
|
compressing. Swizzling, like @c rabb may yield drastically
|
|
different error metrics if done after supercompression.
|
|
*/
|
|
ktx_bool_t noEndpointRDO;
|
|
/*!< Disable endpoint rate distortion optimizations. Slightly faster,
|
|
less noisy output, but lower quality per output bit. Default is
|
|
KTX_FALSE.
|
|
*/
|
|
ktx_bool_t noSelectorRDO;
|
|
/*!< Disable selector rate distortion optimizations. Slightly faster,
|
|
less noisy output, but lower quality per output bit. Default is
|
|
KTX_FALSE.
|
|
*/
|
|
|
|
/* UASTC params */
|
|
|
|
ktx_pack_uastc_flags uastcFlags;
|
|
/*!< A set of ::ktx_pack_uastc_flag_bits_e controlling UASTC
|
|
encoding. The most important value is the level given in the
|
|
least-significant 4 bits which selects a speed vs quality tradeoff
|
|
as shown in the following table:
|
|
|
|
Level/Speed | Quality
|
|
:-----: | :-------:
|
|
KTX_PACK_UASTC_LEVEL_FASTEST | 43.45dB
|
|
KTX_PACK_UASTC_LEVEL_FASTER | 46.49dB
|
|
KTX_PACK_UASTC_LEVEL_DEFAULT | 47.47dB
|
|
KTX_PACK_UASTC_LEVEL_SLOWER | 48.01dB
|
|
KTX_PACK_UASTC_LEVEL_VERYSLOW | 48.24dB
|
|
*/
|
|
ktx_bool_t uastcRDO;
|
|
/*!< Enable Rate Distortion Optimization (RDO) post-processing.
|
|
*/
|
|
float uastcRDOQualityScalar;
|
|
/*!< UASTC RDO quality scalar (lambda). Lower values yield higher
|
|
quality/larger LZ compressed files, higher values yield lower
|
|
quality/smaller LZ compressed files. A good range to try is [.2,4].
|
|
Full range is [.001,50.0]. Default is 1.0.
|
|
*/
|
|
ktx_uint32_t uastcRDODictSize;
|
|
/*!< UASTC RDO dictionary size in bytes. Default is 4096. Lower
|
|
values=faster, but give less compression. Range is [64,65536].
|
|
*/
|
|
float uastcRDOMaxSmoothBlockErrorScale;
|
|
/*!< UASTC RDO max smooth block error scale. Range is [1,300].
|
|
Default is 10.0, 1.0 is disabled. Larger values suppress more
|
|
artifacts (and allocate more bits) on smooth blocks.
|
|
*/
|
|
float uastcRDOMaxSmoothBlockStdDev;
|
|
/*!< UASTC RDO max smooth block standard deviation. Range is
|
|
[.01,65536.0]. Default is 18.0. Larger values expand the range of
|
|
blocks considered smooth.
|
|
*/
|
|
ktx_bool_t uastcRDODontFavorSimplerModes;
|
|
/*!< Do not favor simpler UASTC modes in RDO mode.
|
|
*/
|
|
ktx_bool_t uastcRDONoMultithreading;
|
|
/*!< Disable RDO multithreading (slightly higher compression,
|
|
deterministic).
|
|
*/
|
|
|
|
} ktxBasisParams;
|
|
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture2_CompressBasisEx(ktxTexture2* This, ktxBasisParams* params);
|
|
|
|
/**
|
|
* @~English
|
|
* @brief Enumerators for specifying the transcode target format.
|
|
*
|
|
* For BasisU/ETC1S format, @e Opaque and @e alpha here refer to 2 separate
|
|
* RGB images, a.k.a slices within the BasisU compressed data. For UASTC
|
|
* format they refer to the RGB and the alpha components of the UASTC data. If
|
|
* the original image had only 2 components, R will be in the opaque portion
|
|
* and G in the alpha portion. The R value will be replicated in the RGB
|
|
* components. In the case of BasisU the G value will be replicated in all 3
|
|
* components of the alpha slice. If the original image had only 1 component
|
|
* it's value is replicated in all 3 components of the opaque portion and
|
|
* there is no alpha.
|
|
*
|
|
* @note You should not transcode sRGB encoded data to @c KTX_TTF_BC4_R,
|
|
* @c KTX_TTF_BC5_RG, @c KTX_TTF_ETC2_EAC_R{,G}11, @c KTX_TTF_RGB565,
|
|
* @c KTX_TTF_BGR565 or @c KTX_TTF_RGBA4444 formats as neither OpenGL nor
|
|
* Vulkan support sRGB variants of these. Doing sRGB decoding in the shader
|
|
* will not produce correct results if any texture filtering is being used.
|
|
*/
|
|
typedef enum ktx_transcode_fmt_e {
|
|
// Compressed formats
|
|
|
|
// ETC1-2
|
|
KTX_TTF_ETC1_RGB = 0,
|
|
/*!< Opaque only. Returns RGB or alpha data, if
|
|
KTX_TF_TRANSCODE_ALPHA_DATA_TO_OPAQUE_FORMATS flag is
|
|
specified. */
|
|
KTX_TTF_ETC2_RGBA = 1,
|
|
/*!< Opaque+alpha. EAC_A8 block followed by an ETC1 block. The
|
|
alpha channel will be opaque for textures without an alpha
|
|
channel. */
|
|
|
|
// BC1-5, BC7 (desktop, some mobile devices)
|
|
KTX_TTF_BC1_RGB = 2,
|
|
/*!< Opaque only, no punchthrough alpha support yet. Returns RGB
|
|
or alpha data, if KTX_TF_TRANSCODE_ALPHA_DATA_TO_OPAQUE_FORMATS
|
|
flag is specified. */
|
|
KTX_TTF_BC3_RGBA = 3,
|
|
/*!< Opaque+alpha. BC4 block with alpha followed by a BC1 block. The
|
|
alpha channel will be opaque for textures without an alpha
|
|
channel. */
|
|
KTX_TTF_BC4_R = 4,
|
|
/*!< One BC4 block. R = opaque.g or alpha.g, if
|
|
KTX_TF_TRANSCODE_ALPHA_DATA_TO_OPAQUE_FORMATS flag is
|
|
specified. */
|
|
KTX_TTF_BC5_RG = 5,
|
|
/*!< Two BC4 blocks, R=opaque.g and G=alpha.g The texture should
|
|
have an alpha channel (if not G will be all 255's. For tangent
|
|
space normal maps. */
|
|
KTX_TTF_BC7_RGBA = 6,
|
|
/*!< RGB or RGBA mode 5 for ETC1S, modes 1, 2, 3, 4, 5, 6, 7 for
|
|
UASTC. */
|
|
|
|
// PVRTC1 4bpp (mobile, PowerVR devices)
|
|
KTX_TTF_PVRTC1_4_RGB = 8,
|
|
/*!< Opaque only. Returns RGB or alpha data, if
|
|
KTX_TF_TRANSCODE_ALPHA_DATA_TO_OPAQUE_FORMATS flag is
|
|
specified. */
|
|
KTX_TTF_PVRTC1_4_RGBA = 9,
|
|
/*!< Opaque+alpha. Most useful for simple opacity maps. If the
|
|
texture doesn't have an alpha channel KTX_TTF_PVRTC1_4_RGB
|
|
will be used instead. Lowest quality of any supported
|
|
texture format. */
|
|
|
|
// ASTC (mobile, Intel devices, hopefully all desktop GPU's one day)
|
|
KTX_TTF_ASTC_4x4_RGBA = 10,
|
|
/*!< Opaque+alpha, ASTC 4x4. The alpha channel will be opaque for
|
|
textures without an alpha channel. The transcoder uses
|
|
RGB/RGBA/L/LA modes, void extent, and up to two ([0,47] and
|
|
[0,255]) endpoint precisions. */
|
|
|
|
// ATC and FXT1 formats are not supported by KTX2 as there
|
|
// are no equivalent VkFormats.
|
|
|
|
KTX_TTF_PVRTC2_4_RGB = 18,
|
|
/*!< Opaque-only. Almost BC1 quality, much faster to transcode
|
|
and supports arbitrary texture dimensions (unlike
|
|
PVRTC1 RGB). */
|
|
KTX_TTF_PVRTC2_4_RGBA = 19,
|
|
/*!< Opaque+alpha. Slower to transcode than cTFPVRTC2_4_RGB.
|
|
Premultiplied alpha is highly recommended, otherwise the
|
|
color channel can leak into the alpha channel on transparent
|
|
blocks. */
|
|
|
|
KTX_TTF_ETC2_EAC_R11 = 20,
|
|
/*!< R only (ETC2 EAC R11 unsigned). R = opaque.g or alpha.g, if
|
|
KTX_TF_TRANSCODE_ALPHA_DATA_TO_OPAQUE_FORMATS flag is
|
|
specified. */
|
|
KTX_TTF_ETC2_EAC_RG11 = 21,
|
|
/*!< RG only (ETC2 EAC RG11 unsigned), R=opaque.g, G=alpha.g. The
|
|
texture should have an alpha channel (if not G will be all
|
|
255's. For tangent space normal maps. */
|
|
|
|
// Uncompressed (raw pixel) formats
|
|
KTX_TTF_RGBA32 = 13,
|
|
/*!< 32bpp RGBA image stored in raster (not block) order in
|
|
memory, R is first byte, A is last byte. */
|
|
KTX_TTF_RGB565 = 14,
|
|
/*!< 16bpp RGB image stored in raster (not block) order in memory,
|
|
R at bit position 11. */
|
|
KTX_TTF_BGR565 = 15,
|
|
/*!< 16bpp RGB image stored in raster (not block) order in memory,
|
|
R at bit position 0. */
|
|
KTX_TTF_RGBA4444 = 16,
|
|
/*!< 16bpp RGBA image stored in raster (not block) order in memory,
|
|
R at bit position 12, A at bit position 0. */
|
|
|
|
// Values for automatic selection of RGB or RGBA depending if alpha
|
|
// present.
|
|
KTX_TTF_ETC = 22,
|
|
/*!< Automatically selects @c KTX_TTF_ETC1_RGB or
|
|
@c KTX_TTF_ETC2_RGBA according to presence of alpha. */
|
|
KTX_TTF_BC1_OR_3 = 23,
|
|
/*!< Automatically selects @c KTX_TTF_BC1_RGB or
|
|
@c KTX_TTF_BC3_RGBA according to presence of alpha. */
|
|
|
|
KTX_TTF_NOSELECTION = 0x7fffffff,
|
|
|
|
// Old enums for compatibility with code compiled against previous
|
|
// versions of libktx.
|
|
KTX_TF_ETC1 = KTX_TTF_ETC1_RGB,
|
|
//!< @deprecated. Use #KTX_TTF_ETC1_RGB.
|
|
KTX_TF_ETC2 = KTX_TTF_ETC,
|
|
//!< @deprecated. Use #KTX_TTF_ETC.
|
|
KTX_TF_BC1 = KTX_TTF_BC1_RGB,
|
|
//!< @deprecated. Use #KTX_TTF_BC1_RGB.
|
|
KTX_TF_BC3 = KTX_TTF_BC3_RGBA,
|
|
//!< @deprecated. Use #KTX_TTF_BC3_RGBA.
|
|
KTX_TF_BC4 = KTX_TTF_BC4_R,
|
|
//!< @deprecated. Use #KTX_TTF_BC4_R.
|
|
KTX_TF_BC5 = KTX_TTF_BC5_RG,
|
|
//!< @deprecated. Use #KTX_TTF_BC5_RG.
|
|
KTX_TTF_BC7_M6_RGB = KTX_TTF_BC7_RGBA,
|
|
//!< @deprecated. Use #KTX_TTF_BC7_RGBA.
|
|
KTX_TTF_BC7_M5_RGBA = KTX_TTF_BC7_RGBA,
|
|
//!< @deprecated. Use #KTX_TTF_BC7_RGBA.
|
|
KTX_TF_BC7_M6_OPAQUE_ONLY = KTX_TTF_BC7_RGBA,
|
|
//!< @deprecated. Use #KTX_TTF_BC7_RGBA
|
|
KTX_TF_PVRTC1_4_OPAQUE_ONLY = KTX_TTF_PVRTC1_4_RGB
|
|
//!< @deprecated. Use #KTX_TTF_PVRTC1_4_RGB.
|
|
} ktx_transcode_fmt_e;
|
|
|
|
/**
|
|
* @~English
|
|
* @brief Flags guiding transcoding of Basis Universal compressed textures.
|
|
*/
|
|
typedef enum ktx_transcode_flag_bits_e {
|
|
KTX_TF_PVRTC_DECODE_TO_NEXT_POW2 = 2,
|
|
/*!< PVRTC1: decode non-pow2 ETC1S texture level to the next larger
|
|
power of 2 (not implemented yet, but we're going to support it).
|
|
Ignored if the slice's dimensions are already a power of 2.
|
|
*/
|
|
KTX_TF_TRANSCODE_ALPHA_DATA_TO_OPAQUE_FORMATS = 4,
|
|
/*!< When decoding to an opaque texture format, if the Basis data has
|
|
alpha, decode the alpha slice instead of the color slice to the
|
|
output texture format. Has no effect if there is no alpha data.
|
|
*/
|
|
KTX_TF_HIGH_QUALITY = 32,
|
|
/*!< Request higher quality transcode of UASTC to BC1, BC3, ETC2_EAC_R11 and
|
|
ETC2_EAC_RG11. The flag is unused by other UASTC transcoders.
|
|
*/
|
|
} ktx_transcode_flag_bits_e;
|
|
typedef ktx_uint32_t ktx_transcode_flags;
|
|
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxTexture2_TranscodeBasis(ktxTexture2* This, ktx_transcode_fmt_e fmt,
|
|
ktx_transcode_flags transcodeFlags);
|
|
|
|
/*
|
|
* Returns a string corresponding to a KTX error code.
|
|
*/
|
|
KTX_API const char* KTX_APIENTRY
|
|
ktxErrorString(KTX_error_code error);
|
|
|
|
/*
|
|
* Returns a string corresponding to a supercompression scheme.
|
|
*/
|
|
KTX_API const char* KTX_APIENTRY
|
|
ktxSupercompressionSchemeString(ktxSupercmpScheme scheme);
|
|
|
|
/*
|
|
* Returns a string corresponding to a transcode target format.
|
|
*/
|
|
KTX_API const char* KTX_APIENTRY
|
|
ktxTranscodeFormatString(ktx_transcode_fmt_e format);
|
|
|
|
KTX_API KTX_error_code KTX_APIENTRY ktxHashList_Create(ktxHashList** ppHl);
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxHashList_CreateCopy(ktxHashList** ppHl, ktxHashList orig);
|
|
KTX_API void KTX_APIENTRY ktxHashList_Construct(ktxHashList* pHl);
|
|
KTX_API void KTX_APIENTRY
|
|
ktxHashList_ConstructCopy(ktxHashList* pHl, ktxHashList orig);
|
|
KTX_API void KTX_APIENTRY ktxHashList_Destroy(ktxHashList* head);
|
|
KTX_API void KTX_APIENTRY ktxHashList_Destruct(ktxHashList* head);
|
|
|
|
/*
|
|
* Adds a key-value pair to a hash list.
|
|
*/
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxHashList_AddKVPair(ktxHashList* pHead, const char* key,
|
|
unsigned int valueLen, const void* value);
|
|
|
|
/*
|
|
* Deletes a ktxHashListEntry from a ktxHashList.
|
|
*/
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxHashList_DeleteEntry(ktxHashList* pHead, ktxHashListEntry* pEntry);
|
|
|
|
/*
|
|
* Finds the entry for a key in a ktxHashList and deletes it.
|
|
*/
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxHashList_DeleteKVPair(ktxHashList* pHead, const char* key);
|
|
|
|
/*
|
|
* Looks up a key and returns the ktxHashListEntry.
|
|
*/
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxHashList_FindEntry(ktxHashList* pHead, const char* key,
|
|
ktxHashListEntry** ppEntry);
|
|
|
|
/*
|
|
* Looks up a key and returns the value.
|
|
*/
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxHashList_FindValue(ktxHashList* pHead, const char* key,
|
|
unsigned int* pValueLen, void** pValue);
|
|
|
|
/*
|
|
* Return the next entry in a ktxHashList.
|
|
*/
|
|
KTX_API ktxHashListEntry* KTX_APIENTRY
|
|
ktxHashList_Next(ktxHashListEntry* entry);
|
|
|
|
/*
|
|
* Sorts a ktxHashList into order of the key codepoints.
|
|
*/
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxHashList_Sort(ktxHashList* pHead);
|
|
|
|
/*
|
|
* Serializes a ktxHashList to a block of memory suitable for
|
|
* writing to a KTX file.
|
|
*/
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxHashList_Serialize(ktxHashList* pHead,
|
|
unsigned int* kvdLen, unsigned char** kvd);
|
|
|
|
/*
|
|
* Creates a hash table from the serialized data read from a
|
|
* a KTX file.
|
|
*/
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxHashList_Deserialize(ktxHashList* pHead, unsigned int kvdLen, void* kvd);
|
|
|
|
/*
|
|
* Get the key from a ktxHashListEntry
|
|
*/
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxHashListEntry_GetKey(ktxHashListEntry* This,
|
|
unsigned int* pKeyLen, char** ppKey);
|
|
|
|
/*
|
|
* Get the value from a ktxHashListEntry
|
|
*/
|
|
KTX_API KTX_error_code KTX_APIENTRY
|
|
ktxHashListEntry_GetValue(ktxHashListEntry* This,
|
|
unsigned int* pValueLen, void** ppValue);
|
|
|
|
/*===========================================================*
|
|
* Utilities for printing info about a KTX file. *
|
|
*===========================================================*/
|
|
|
|
KTX_API KTX_error_code KTX_APIENTRY ktxPrintInfoForStdioStream(FILE* stdioStream);
|
|
KTX_API KTX_error_code KTX_APIENTRY ktxPrintInfoForNamedFile(const char* const filename);
|
|
KTX_API KTX_error_code KTX_APIENTRY ktxPrintInfoForMemory(const ktx_uint8_t* bytes, ktx_size_t size);
|
|
|
|
/*===========================================================*
|
|
* Utilities for printing info about a KTX2 file. *
|
|
*===========================================================*/
|
|
|
|
KTX_API KTX_error_code KTX_APIENTRY ktxPrintKTX2InfoTextForMemory(const ktx_uint8_t* bytes, ktx_size_t size);
|
|
KTX_API KTX_error_code KTX_APIENTRY ktxPrintKTX2InfoTextForNamedFile(const char* const filename);
|
|
KTX_API KTX_error_code KTX_APIENTRY ktxPrintKTX2InfoTextForStdioStream(FILE* stdioStream);
|
|
KTX_API KTX_error_code KTX_APIENTRY ktxPrintKTX2InfoTextForStream(ktxStream* stream);
|
|
KTX_API KTX_error_code KTX_APIENTRY ktxPrintKTX2InfoJSONForMemory(const ktx_uint8_t* bytes, ktx_size_t size, ktx_uint32_t base_indent, ktx_uint32_t indent_width, bool minified);
|
|
KTX_API KTX_error_code KTX_APIENTRY ktxPrintKTX2InfoJSONForNamedFile(const char* const filename, ktx_uint32_t base_indent, ktx_uint32_t indent_width, bool minified);
|
|
KTX_API KTX_error_code KTX_APIENTRY ktxPrintKTX2InfoJSONForStdioStream(FILE* stdioStream, ktx_uint32_t base_indent, ktx_uint32_t indent_width, bool minified);
|
|
KTX_API KTX_error_code KTX_APIENTRY ktxPrintKTX2InfoJSONForStream(ktxStream* stream, ktx_uint32_t base_indent, ktx_uint32_t indent_width, bool minified);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
/*========================================================================*
|
|
* For backward compatibilty with the V3 & early versions of the V4 APIs. *
|
|
*========================================================================*/
|
|
|
|
/**
|
|
* @deprecated Will be dropped before V4 release.
|
|
*/
|
|
#define ktx_texture_transcode_fmt_e ktx_transcode_fmt_e
|
|
|
|
/**
|
|
* @deprecated Will be dropped before V4 release.
|
|
*/
|
|
#define ktx_texture_decode_flags ktx_transcode_flag_bits
|
|
|
|
/**
|
|
* @deprecated Will be dropped before V4 release.
|
|
*/
|
|
#define ktxTexture_GetSize ktxTexture_GetDatasize
|
|
|
|
/**
|
|
@~English
|
|
@page libktx_history Revision History
|
|
|
|
No longer updated. Kept to preserve ancient history. For more recent history see the repo log at
|
|
https://github.com/KhronosGroup/KTX-Software. See also the Release Notes in the repo.
|
|
|
|
@section v8 Version 4.0
|
|
Added:
|
|
@li Support for KTX Version 2.
|
|
@li Support for encoding and transcoding Basis Universal images in KTX Version 2 files.
|
|
@li Function to print info about a KTX file.
|
|
|
|
@section v7 Version 3.0.1
|
|
Fixed:
|
|
@li GitHub issue #159: compile failure with recent Vulkan SDKs.
|
|
@li Incorrect mapping of GL DXT3 and DXT5 formats to Vulkan equivalents.
|
|
@li Incorrect BC4 blocksize.
|
|
@li Missing mapping of PVRTC formats from GL to Vulkan.
|
|
@li Incorrect block width and height calculations for sizes that are not
|
|
a multiple of the block size.
|
|
@li Incorrect KTXorientation key in test images.
|
|
|
|
@section v6 Version 3.0
|
|
Added:
|
|
@li new ktxTexture object based API for reading KTX files without an OpenGL context.
|
|
@li Vulkan loader. @#include <ktxvulkan.h> to use it.
|
|
|
|
Changed:
|
|
@li ktx.h to not depend on KHR/khrplatform.h and GL{,ES*}/gl{corearb,}.h.
|
|
Applications using OpenGL must now include these files themselves.
|
|
@li ktxLoadTexture[FMN], removing the hack of loading 1D textures as 2D textures
|
|
when the OpenGL context does not support 1D textures.
|
|
KTX_UNSUPPORTED_TEXTURE_TYPE is now returned.
|
|
|
|
@section v5 Version 2.0.2
|
|
Added:
|
|
@li Support for cubemap arrays.
|
|
|
|
Changed:
|
|
@li New build system
|
|
|
|
Fixed:
|
|
@li GitHub issue #40: failure to byte-swap key-value lengths.
|
|
@li GitHub issue #33: returning incorrect target when loading cubemaps.
|
|
@li GitHub PR #42: loading of texture arrays.
|
|
@li GitHub PR #41: compilation error when KTX_OPENGL_ES2=1 defined.
|
|
@li GitHub issue #39: stack-buffer-overflow in toktx
|
|
@li Don't use GL_EXTENSIONS on recent OpenGL versions.
|
|
|
|
@section v4 Version 2.0.1
|
|
Added:
|
|
@li CMake build files. Thanks to Pavel Rotjberg for the initial version.
|
|
|
|
Changed:
|
|
@li ktxWriteKTXF to check the validity of the type & format combinations
|
|
passed to it.
|
|
|
|
Fixed:
|
|
@li Public Bugzilla <a href="http://www.khronos.org/bugzilla/show_bug.cgi?id=999">999</a>: 16-bit luminance texture cannot be written.
|
|
@li compile warnings from compilers stricter than MS Visual C++. Thanks to
|
|
Pavel Rotjberg.
|
|
|
|
@section v3 Version 2.0
|
|
Added:
|
|
@li support for decoding ETC2 and EAC formats in the absence of a hardware
|
|
decoder.
|
|
@li support for converting textures with legacy LUMINANCE, LUMINANCE_ALPHA,
|
|
etc. formats to the equivalent R, RG, etc. format with an
|
|
appropriate swizzle, when loading in OpenGL Core Profile contexts.
|
|
@li ktxErrorString function to return a string corresponding to an error code.
|
|
@li tests for ktxLoadTexture[FN] that run under OpenGL ES 3.0 and OpenGL 3.3.
|
|
The latter includes an EGL on WGL wrapper that makes porting apps between
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OpenGL ES and OpenGL easier on Windows.
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@li more texture formats to ktxLoadTexture[FN] and toktx tests.
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Changed:
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@li ktxLoadTexture[FMN] to discover the capabilities of the GL context at
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run time and load textures, or not, according to those capabilities.
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Fixed:
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@li failure of ktxWriteKTXF to pad image rows to 4 bytes as required by the KTX
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format.
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@li ktxWriteKTXF exiting with KTX_FILE_WRITE_ERROR when attempting to write
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more than 1 byte of face-LOD padding.
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Although there is only a very minor API change, the addition of ktxErrorString,
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the functional changes are large enough to justify bumping the major revision
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number.
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@section v2 Version 1.0.1
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Implemented ktxLoadTextureM.
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Fixed the following:
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@li Public Bugzilla <a href="http://www.khronos.org/bugzilla/show_bug.cgi?id=571">571</a>: crash when null passed for pIsMipmapped.
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@li Public Bugzilla <a href="http://www.khronos.org/bugzilla/show_bug.cgi?id=572">572</a>: memory leak when unpacking ETC textures.
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@li Public Bugzilla <a href="http://www.khronos.org/bugzilla/show_bug.cgi?id=573">573</a>: potential crash when unpacking ETC textures with unused padding pixels.
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@li Public Bugzilla <a href="http://www.khronos.org/bugzilla/show_bug.cgi?id=576">576</a>: various small fixes.
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Thanks to Krystian Bigaj for the ktxLoadTextureM implementation and these fixes.
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@section v1 Version 1.0
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Initial release.
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*/
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#endif /* KTX_H_A55A6F00956F42F3A137C11929827FE1 */
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