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godot/thirdparty/libktx/lib/texture1.c
acazuc a00cf02241 Add support for KTX & KTX2 image format 
Add support glTF KHR_texture_basisu extension
2023-08-19 10:27:29 +02:00

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/* -*- 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 ktxTexture1 implementation. Support for KTX format.
*
* @author Mark Callow, www.edgewise-consulting.com
*/
#if defined(_WIN32)
#define _CRT_SECURE_NO_WARNINGS
#endif
#include <stdlib.h>
#include <string.h>
#include "dfdutils/dfd.h"
#include "ktx.h"
#include "ktxint.h"
#include "filestream.h"
#include "memstream.h"
#include "texture1.h"
#include "unused.h"
#include "gl_format.h"
typedef struct ktxTexture1_private {
ktx_bool_t _needSwap;
} ktxTexture1_private;
struct ktxTexture_vtbl ktxTexture1_vtbl;
struct ktxTexture_vtblInt ktxTexture1_vtblInt;
static KTX_error_code
ktxTexture1_constructCommon(ktxTexture1* This)
{
assert(This != NULL);
This->classId = ktxTexture1_c;
This->vtbl = &ktxTexture1_vtbl;
This->_protected->_vtbl = ktxTexture1_vtblInt;
This->_private = (ktxTexture1_private*)malloc(sizeof(ktxTexture1_private));
if (This->_private == NULL) {
return KTX_OUT_OF_MEMORY;
}
memset(This->_private, 0, sizeof(*This->_private));
return KTX_SUCCESS;
}
/**
* @memberof ktxTexture1 @private
* @copydoc ktxTexture2_construct
*/
static KTX_error_code
ktxTexture1_construct(ktxTexture1* This, ktxTextureCreateInfo* createInfo,
ktxTextureCreateStorageEnum storageAllocation)
{
ktxTexture_protected* prtctd;
ktxFormatSize formatSize;
GLuint typeSize;
GLenum glFormat;
KTX_error_code result;
memset(This, 0, sizeof(*This));
This->glInternalformat = createInfo->glInternalformat;
glGetFormatSize(This->glInternalformat, &formatSize);
if (formatSize.blockSizeInBits == 0) {
// Most likely a deprecated legacy format.
return KTX_UNSUPPORTED_TEXTURE_TYPE;
}
glFormat= glGetFormatFromInternalFormat(createInfo->glInternalformat);
if (glFormat == GL_INVALID_VALUE) {
return KTX_INVALID_VALUE;
}
result = ktxTexture_construct(ktxTexture(This), createInfo, &formatSize);
if (result != KTX_SUCCESS)
return result;
result = ktxTexture1_constructCommon(This);
if (result != KTX_SUCCESS)
return result;
prtctd = This->_protected;
This->isCompressed
= (formatSize.flags & KTX_FORMAT_SIZE_COMPRESSED_BIT);
if (This->isCompressed) {
This->glFormat = 0;
This->glBaseInternalformat = glFormat;
This->glType = 0;
prtctd->_typeSize = 1;
} else {
This->glBaseInternalformat = This->glFormat = glFormat;
This->glType
= glGetTypeFromInternalFormat(createInfo->glInternalformat);
if (This->glType == GL_INVALID_VALUE) {
result = KTX_INVALID_VALUE;
goto cleanup;
}
typeSize = glGetTypeSizeFromType(This->glType);
assert(typeSize != GL_INVALID_VALUE);
/* Do some sanity checking */
if (typeSize != 1 &&
typeSize != 2 &&
typeSize != 4)
{
/* Only 8, 16, and 32-bit types are supported for byte-swapping.
* See UNPACK_SWAP_BYTES & table 8.4 in the OpenGL 4.4 spec.
*/
result = KTX_INVALID_VALUE;
goto cleanup;
}
prtctd->_typeSize = typeSize;
}
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:
ktxTexture1_destruct(This);
ktxTexture_destruct(ktxTexture(This));
return result;
}
/**
* @memberof ktxTexture1 @private
* @brief Construct a ktxTexture1 from a ktxStream reading from a KTX source.
*
* The KTX header, that must have been read prior to calling this, is passed
* to the function.
*
* The stream object is copied into the constructed ktxTexture1.
*
* The create flag KTX_TEXTURE_CREATE_LOAD_IMAGE_DATA_BIT should not be set,
* if the ktxTexture1 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
* ktxTexture1.
*
* @param[in] This pointer to a ktxTexture1-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
ktxTexture1_constructFromStreamAndHeader(ktxTexture1* This, ktxStream* pStream,
KTX_header* pHeader,
ktxTextureCreateFlags createFlags)
{
ktxTexture1_private* private;
KTX_error_code result;
KTX_supplemental_info suppInfo;
ktxStream* stream;
ktx_off_t pos;
ktx_size_t size;
ktxFormatSize formatSize;
assert(pHeader != NULL && pStream != NULL);
memset(This, 0, sizeof(*This));
result = ktxTexture_constructFromStream(ktxTexture(This), pStream, createFlags);
if (result != KTX_SUCCESS)
return result;
result = ktxTexture1_constructCommon(This);
if (result != KTX_SUCCESS) {
ktxTexture_destruct(ktxTexture(This));
return result;
}
private = This->_private;
stream = ktxTexture1_getStream(This);
result = ktxCheckHeader1_(pHeader, &suppInfo);
if (result != KTX_SUCCESS)
goto cleanup;
/*
* Initialize from pHeader info.
*/
This->glFormat = pHeader->glFormat;
This->glInternalformat = pHeader->glInternalformat;
This->glType = pHeader->glType;
glGetFormatSize(This->glInternalformat, &formatSize);
if (formatSize.blockSizeInBits == 0) {
// Most likely a deprecated legacy format.
result = KTX_UNSUPPORTED_TEXTURE_TYPE;
goto cleanup;
}
This->_protected->_formatSize = formatSize;
This->glBaseInternalformat = pHeader->glBaseInternalformat;
// 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->numberOfArrayElements > 0) {
This->numLayers = pHeader->numberOfArrayElements;
This->isArray = KTX_TRUE;
} else {
This->numLayers = 1;
This->isArray = KTX_FALSE;
}
This->numFaces = pHeader->numberOfFaces;
if (pHeader->numberOfFaces == 6)
This->isCubemap = KTX_TRUE;
else
This->isCubemap = KTX_FALSE;
This->numLevels = pHeader->numberOfMipLevels;
This->isCompressed = suppInfo.compressed;
This->generateMipmaps = suppInfo.generateMipmaps;
if (pHeader->endianness == KTX_ENDIAN_REF_REV)
private->_needSwap = KTX_TRUE;
This->_protected->_typeSize = pHeader->glTypeSize;
/*
* Make an empty hash list.
*/
ktxHashList_Construct(&This->kvDataHead);
/*
* Load KVData.
*/
if (pHeader->bytesOfKeyValueData > 0) {
if (!(createFlags & KTX_TEXTURE_CREATE_SKIP_KVDATA_BIT)) {
ktx_uint32_t kvdLen = pHeader->bytesOfKeyValueData;
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 (private->_needSwap) {
/* 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* pKeyAndValueByteSize = (ktx_uint32_t*)src;
_ktxSwapEndian32(pKeyAndValueByteSize, 1);
src += _KTX_PAD4(*pKeyAndValueByteSize);
}
}
if (!(createFlags & KTX_TEXTURE_CREATE_RAW_KVDATA_BIT)) {
char* orientation;
ktx_uint32_t orientationLen;
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**)&orientation);
assert(result != KTX_INVALID_VALUE);
if (result == KTX_SUCCESS) {
ktx_uint32_t count;
char orient[4] = {0, 0, 0, 0};
count = sscanf(orientation, KTX_ORIENTATION3_FMT,
&orient[0],
&orient[1],
&orient[2]);
if (count > This->numDimensions) {
// KTX 1 is less strict than KTX2 so there is a chance
// of having more dimensions than needed.
count = This->numDimensions;
}
switch (This->numDimensions) {
case 3:
This->orientation.z = orient[2];
FALLTHROUGH;
case 2:
This->orientation.y = orient[1];
FALLTHROUGH;
case 1:
This->orientation.x = orient[0];
}
}
} else {
This->kvDataLen = kvdLen;
This->kvData = pKvd;
}
} else {
stream->skip(stream, pHeader->bytesOfKeyValueData);
}
}
/*
* Get the size of the image data.
*/
result = stream->getsize(stream, &size);
if (result != KTX_SUCCESS)
goto cleanup;
result = stream->getpos(stream, &pos);
if (result != KTX_SUCCESS)
goto cleanup;
/* Remove space for faceLodSize fields */
This->dataSize = size - pos - This->numLevels * sizeof(ktx_uint32_t);
/*
* Load the images, if requested.
*/
if (createFlags & KTX_TEXTURE_CREATE_LOAD_IMAGE_DATA_BIT) {
result = ktxTexture1_LoadImageData(This, NULL, 0);
}
if (result == KTX_SUCCESS)
return result;
cleanup:
ktxTexture1_destruct(This);
return result;
}
/**
* @memberof ktxTexture1 @private
* @brief Construct a ktxTexture1 from a ktxStream reading from a KTX source.
*
* The stream object is copied into the constructed ktxTexture1.
*
* The create flag KTX_TEXTURE_CREATE_LOAD_IMAGE_DATA_BIT should not be set,
* if the ktxTexture1 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
* ktxTexture1.
*
* @param[in] This pointer to a ktxTexture1-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 ktxTexture1_constructFromStreamAndHeader().
*/
static KTX_error_code
ktxTexture1_constructFromStream(ktxTexture1* This, ktxStream* pStream,
ktxTextureCreateFlags createFlags)
{
KTX_header header;
KTX_error_code result;
// Read header.
result = pStream->read(pStream, &header, KTX_HEADER_SIZE);
if (result != KTX_SUCCESS)
return result;
return ktxTexture1_constructFromStreamAndHeader(This, pStream,
&header, createFlags);
}
/**
* @memberof ktxTexture1 @private
* @brief Construct a ktxTexture1 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
ktxTexture1_constructFromStdioStream(ktxTexture1* This, FILE* stdioStream,
ktxTextureCreateFlags createFlags)
{
ktxStream stream;
KTX_error_code result;
if (stdioStream == NULL || This == NULL)
return KTX_INVALID_VALUE;
result = ktxFileStream_construct(&stream, stdioStream, KTX_FALSE);
if (result == KTX_SUCCESS)
result = ktxTexture1_constructFromStream(This, &stream, createFlags);
return result;
}
/**
* @memberof ktxTexture1 @private
* @brief Construct a ktxTexture1 from a named KTX file.
*
* 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
ktxTexture1_constructFromNamedFile(ktxTexture1* This,
const char* const filename,
ktxTextureCreateFlags createFlags)
{
FILE* file;
ktxStream stream;
KTX_error_code result;
if (This == NULL || filename == NULL)
return KTX_INVALID_VALUE;
file = fopen(filename, "rb");
if (!file)
return KTX_FILE_OPEN_FAILED;
result = ktxFileStream_construct(&stream, file, KTX_TRUE);
if (result == KTX_SUCCESS)
result = ktxTexture1_constructFromStream(This, &stream, createFlags);
return result;
}
/**
* @memberof ktxTexture1 @private
* @brief Construct a ktxTexture1 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
ktxTexture1_constructFromMemory(ktxTexture1* This,
const ktx_uint8_t* bytes, ktx_size_t size,
ktxTextureCreateFlags createFlags)
{
ktxStream stream;
KTX_error_code result;
if (bytes == NULL || size == 0)
return KTX_INVALID_VALUE;
result = ktxMemStream_construct_ro(&stream, bytes, size);
if (result == KTX_SUCCESS)
result = ktxTexture1_constructFromStream(This, &stream, createFlags);
return result;
}
void
ktxTexture1_destruct(ktxTexture1* This)
{
if (This->_private) free(This->_private);
ktxTexture_destruct(ktxTexture(This));
}
/**
* @defgroup reader Reader
* @brief Read KTX-formatted data.
* @{
*/
/**
* @memberof ktxTexture1
* @ingroup writer
* @brief Create a new empty ktxTexture1.
*
* The address of the newly created ktxTexture1 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 <tt>base{Width,Height,Depth}</tt> 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 <tt>base{Width,Height,Depth}</tt> 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
* <tt>base{Width,Height,Depth}</tt>.
* @exception KTX_OUT_OF_MEMORY Not enough memory for the texture's images.
*/
KTX_error_code
ktxTexture1_Create(ktxTextureCreateInfo* createInfo,
ktxTextureCreateStorageEnum storageAllocation,
ktxTexture1** newTex)
{
KTX_error_code result;
if (newTex == NULL)
return KTX_INVALID_VALUE;
ktxTexture1* tex = (ktxTexture1*)malloc(sizeof(ktxTexture1));
if (tex == NULL)
return KTX_OUT_OF_MEMORY;
result = ktxTexture1_construct(tex, createInfo, storageAllocation);
if (result != KTX_SUCCESS) {
free(tex);
} else {
*newTex = tex;
}
return result;
}
/**
* @memberof ktxTexture1
* @~English
* @brief Create a ktxTexture1 from a stdio stream reading from a KTX source.
*
* The address of a newly created ktxTexture1 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 ktxTexture1 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
* ktxTexture1.
*
* @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
ktxTexture1_CreateFromStdioStream(FILE* stdioStream,
ktxTextureCreateFlags createFlags,
ktxTexture1** newTex)
{
KTX_error_code result;
if (newTex == NULL)
return KTX_INVALID_VALUE;
ktxTexture1* tex = (ktxTexture1*)malloc(sizeof(ktxTexture1));
if (tex == NULL)
return KTX_OUT_OF_MEMORY;
result = ktxTexture1_constructFromStdioStream(tex, stdioStream,
createFlags);
if (result == KTX_SUCCESS)
*newTex = (ktxTexture1*)tex;
else {
free(tex);
*newTex = NULL;
}
return result;
}
/*
* @memberof ktxTexture1
* @~English
* @brief Create a ktxTexture1 from a named KTX file.
*
* The address of a newly created ktxTexture1 reflecting the contents of the
* file 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 ktxTexture1 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
* ktxTexture1.
*
* @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
ktxTexture1_CreateFromNamedFile(const char* const filename,
ktxTextureCreateFlags createFlags,
ktxTexture1** newTex)
{
KTX_error_code result;
if (newTex == NULL)
return KTX_INVALID_VALUE;
ktxTexture1* tex = (ktxTexture1*)malloc(sizeof(ktxTexture1));
if (tex == NULL)
return KTX_OUT_OF_MEMORY;
result = ktxTexture1_constructFromNamedFile(tex, filename, createFlags);
if (result == KTX_SUCCESS)
*newTex = (ktxTexture1*)tex;
else {
free(tex);
*newTex = NULL;
}
return result;
}
/**
* @memberof ktxTexture1
* @~English
* @brief Create a ktxTexture1 from KTX-formatted data in memory.
*
* The address of a newly created ktxTexture1 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 ktxTexture1 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
* ktxTexture1.
*
* @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
ktxTexture1_CreateFromMemory(const ktx_uint8_t* bytes, ktx_size_t size,
ktxTextureCreateFlags createFlags,
ktxTexture1** newTex)
{
KTX_error_code result;
if (newTex == NULL)
return KTX_INVALID_VALUE;
ktxTexture1* tex = (ktxTexture1*)malloc(sizeof(ktxTexture1));
if (tex == NULL)
return KTX_OUT_OF_MEMORY;
result = ktxTexture1_constructFromMemory(tex, bytes, size,
createFlags);
if (result == KTX_SUCCESS)
*newTex = (ktxTexture1*)tex;
else {
free(tex);
*newTex = NULL;
}
return result;
}
/**
* @memberof ktxTexture1
* @~English
* @brief Create a ktxTexture1 from KTX-formatted data from a `ktxStream`.
*
* The address of a newly created ktxTexture1 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 ktxTexture1 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
* ktxTexture1.
*
* @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
ktxTexture1_CreateFromStream(ktxStream* stream,
ktxTextureCreateFlags createFlags,
ktxTexture1** newTex)
{
KTX_error_code result;
if (newTex == NULL)
return KTX_INVALID_VALUE;
ktxTexture1* tex = (ktxTexture1*)malloc(sizeof(ktxTexture1));
if (tex == NULL)
return KTX_OUT_OF_MEMORY;
result = ktxTexture1_constructFromStream(tex, stream, createFlags);
if (result == KTX_SUCCESS)
*newTex = (ktxTexture1*)tex;
else {
free(tex);
*newTex = NULL;
}
return result;
}
/**
* @memberof ktxTexture1
* @~English
* @brief Destroy a ktxTexture1 object.
*
* This frees the memory associated with the texture contents and the memory
* of the ktxTexture1 object. This does @e not delete any OpenGL or Vulkan
* texture objects created by ktxTexture1_GLUpload or ktxTexture1_VkUpload.
*
* @param[in] This pointer to the ktxTexture1 object to destroy
*/
void
ktxTexture1_Destroy(ktxTexture1* This)
{
ktxTexture1_destruct(This);
free(This);
}
/**
* @memberof ktxTexture @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.
*
* @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
ktxTexture1_calcDataSizeLevels(ktxTexture1* This, ktx_uint32_t levels)
{
ktx_uint32_t i;
ktx_size_t dataSize = 0;
assert(This != NULL);
assert(levels <= This->numLevels);
for (i = 0; i < levels; i++) {
ktx_size_t levelSize = ktxTexture_calcLevelSize(ktxTexture(This), i,
KTX_FORMAT_VERSION_ONE);
/* mipPadding. NOTE: this adds padding after the last level too. */
#if KTX_GL_UNPACK_ALIGNMENT != 4
dataSize += _KTX_PAD4(levelSize);
#else
dataSize += levelSize;
#endif
}
return dataSize;
}
/**
* @memberof ktxTexture1 @private
* @~English
*
* @copydoc ktxTexture::ktxTexture_doCalcFaceLodSize
*/
ktx_size_t
ktxTexture1_calcFaceLodSize(ktxTexture1* This, ktx_uint32_t level)
{
return ktxTexture_doCalcFaceLodSize(ktxTexture(This), level,
KTX_FORMAT_VERSION_ONE);
}
/**
* @memberof ktxTexture @private
* @~English
* @brief Return the offset of a level in bytes from the start of the image
* data in a ktxTexture.
*
* The caclulated size does not include space for storing the @c imageSize
* fields of each mip level.
*
* @param[in] This pointer to the ktxTexture object of interest.
* @param[in] level level whose offset to return.
* @param[in] fv enum specifying format version for which to calculate
* image size.
*
* @return the data size in bytes.
*/
ktx_size_t
ktxTexture1_calcLevelOffset(ktxTexture1* This, ktx_uint32_t level)
{
assert (This != NULL);
assert (level < This->numLevels);
return ktxTexture1_calcDataSizeLevels(This, level);
}
/**
* @memberof ktxTexture1
* @~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.
*
* @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_VALID @p This is NULL.
*/
KTX_error_code
ktxTexture1_GetImageOffset(ktxTexture1* 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->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 size of the data up to the start of the indexed level.
*pOffset = ktxTexture_calcDataSizeLevels(ktxTexture(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_ONE);
*pOffset += layer * layerSize;
}
if (faceSlice != 0) {
ktx_size_t imageSize;
imageSize = ktxTexture_GetImageSize(ktxTexture(This), level);
#if (KTX_GL_UNPACK_ALIGNMENT != 4)
if (This->isCubemap)
_KTX_PAD4(imageSize); // Account for cubePadding.
#endif
*pOffset += faceSlice * imageSize;
}
return KTX_SUCCESS;
}
/**
* @memberof ktxTexture1
* @~English
* @brief Return the total size in bytes of the uncompressed data of a ktxTexture1.
*
* This always returns the value of @c This->dataSize. The function is provided for
* symmetry with ktxTexture2.
*
* @param[in] This pointer to the ktxTexture1 object of interest.
* @return The size of the data in the texture.
*/
ktx_size_t
ktxTexture1_GetDataSizeUncompressed(ktxTexture1* This)
{
return This->dataSize;
}
/**
* @memberof ktxTexture1
* @~English
* @brief Calculate & return the size in bytes of an image at the specified
* mip level.
*
* For arrays, this is the size of 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 ktxTexture1 object of interest.
* @param[in] level level of interest.
*/
ktx_size_t
ktxTexture1_GetImageSize(ktxTexture1* This, ktx_uint32_t level)
{
return ktxTexture_calcImageSize(ktxTexture(This), level,
KTX_FORMAT_VERSION_ONE);
}
/**
* @memberof ktxTexture1 @private
* @~English
* @brief Return the size of the primitive type of a single color component
*
* @param[in] This pointer to the ktxTexture1 object of interest.
*
* @return the type size in bytes.
*/
ktx_uint32_t
ktxTexture1_glTypeSize(ktxTexture1* This)
{
assert(This != NULL);
return This->_protected->_typeSize;
}
/**
* @memberof ktxTexture1
* @~English
* @brief Iterate over the mip levels in a ktxTexture1 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.
*
* @param[in] This handle of the 1 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_VALUE @p This is @c NULL or @p iterCb is @c NULL.
*
*/
KTX_error_code
ktxTexture1_IterateLevels(ktxTexture1* This, PFNKTXITERCB iterCb, void* userdata)
{
ktx_uint32_t miplevel;
KTX_error_code result = KTX_SUCCESS;
if (This == NULL)
return KTX_INVALID_VALUE;
if (iterCb == NULL)
return KTX_INVALID_VALUE;
for (miplevel = 0; miplevel < This->numLevels; ++miplevel)
{
GLsizei width, height, depth;
ktx_uint32_t levelSize;
ktx_size_t offset;
/* Array textures have the same number of layers at each mip level. */
width = MAX(1, This->baseWidth >> miplevel);
height = MAX(1, This->baseHeight >> miplevel);
depth = MAX(1, This->baseDepth >> miplevel);
levelSize = (ktx_uint32_t)ktxTexture_calcLevelSize(ktxTexture(This),
miplevel,
KTX_FORMAT_VERSION_ONE);
/* All array layers are passed in a group because that is how
* GL & Vulkan need them. Hence no
* for (layer = 0; layer < This->numLayers)
*/
ktxTexture_GetImageOffset(ktxTexture(This), miplevel, 0, 0, &offset);
result = iterCb(miplevel, 0, width, height, depth,
levelSize, This->pData + offset, userdata);
if (result != KTX_SUCCESS)
break;
}
return result;
}
/**
* @memberof ktxTexture1
* @~English
* @brief Iterate over the images in a ktxTexture1 object while loading the
* image data.
*
* This operates similarly to ktxTexture_IterateLevelFaces() except that it
* loads the images from the ktxTexture1's source to a temporary buffer
* while iterating. 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.
*
* @param[in] This pointer to the ktxTexture1 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 ktxTexture1 was not created from a
* stream, i.e there is no data to load, or
* this ktxTexture1's images have already
* been loaded.
* @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
ktxTexture1_IterateLoadLevelFaces(ktxTexture1* This, PFNKTXITERCB iterCb,
void* userdata)
{
DECLARE_PRIVATE(ktxTexture1);
struct ktxTexture_protected* prtctd = This->_protected;
ktxStream* stream = (ktxStream *)&prtctd->_stream;
ktx_uint32_t dataSize = 0;
ktx_uint32_t miplevel;
KTX_error_code result = KTX_SUCCESS;
void* data = NULL;
if (This == NULL)
return KTX_INVALID_VALUE;
if (This->classId != ktxTexture1_c)
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;
for (miplevel = 0; miplevel < This->numLevels; ++miplevel)
{
ktx_uint32_t faceLodSize;
ktx_uint32_t faceLodSizePadded;
ktx_uint32_t face;
ktx_uint32_t innerIterations;
GLsizei width, height, depth;
/* Array textures have the same number of layers at each mip level. */
width = MAX(1, This->baseWidth >> miplevel);
height = MAX(1, This->baseHeight >> miplevel);
depth = MAX(1, This->baseDepth >> miplevel);
result = stream->read(stream, &faceLodSize, sizeof(ktx_uint32_t));
if (result != KTX_SUCCESS) {
goto cleanup;
}
if (private->_needSwap) {
_ktxSwapEndian32(&faceLodSize, 1);
}
#if (KTX_GL_UNPACK_ALIGNMENT != 4)
faceLodSizePadded = _KTX_PAD4(faceLodSize);
#else
faceLodSizePadded = faceLodSize;
#endif
if (!data) {
/* allocate memory sufficient for the base miplevel */
data = malloc(faceLodSizePadded);
if (!data) {
result = KTX_OUT_OF_MEMORY;
goto cleanup;
}
dataSize = faceLodSizePadded;
}
else if (dataSize < faceLodSizePadded) {
/* subsequent miplevels cannot be larger than the base miplevel */
result = KTX_FILE_DATA_ERROR;
goto cleanup;
}
/* All array layers are passed in a group because that is how
* GL & Vulkan need them. Hence no
* for (layer = 0; layer < This->numLayers)
*/
if (This->isCubemap && !This->isArray)
innerIterations = This->numFaces;
else
innerIterations = 1;
for (face = 0; face < innerIterations; ++face)
{
/* And all z_slices are also passed as a group hence no
* for (z_slice = 0; z_slice < This->depth)
*/
result = stream->read(stream, data, faceLodSizePadded);
if (result != KTX_SUCCESS) {
goto cleanup;
}
/* Perform endianness conversion on texture data */
if (private->_needSwap) {
if (prtctd->_typeSize == 2)
_ktxSwapEndian16((ktx_uint16_t*)data, faceLodSize / 2);
else if (prtctd->_typeSize == 4)
_ktxSwapEndian32((ktx_uint32_t*)data, faceLodSize / 4);
}
result = iterCb(miplevel, face,
width, height, depth,
faceLodSize, data, userdata);
}
}
cleanup:
free(data);
// No further need for this.
stream->destruct(stream);
return result;
}
/**
* @memberof ktxTexture1
* @~English
* @brief Load all the image data from the ktxTexture1's source.
*
* The data is loaded into the provided buffer or to an internally allocated
* buffer, if @p pBuffer is @c NULL.
*
* @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
ktxTexture1_LoadImageData(ktxTexture1* This,
ktx_uint8_t* pBuffer, ktx_size_t bufSize)
{
DECLARE_PROTECTED(ktxTexture);
DECLARE_PRIVATE(ktxTexture1);
ktx_uint32_t miplevel;
ktx_uint8_t* pDest;
KTX_error_code result = KTX_SUCCESS;
if (This == NULL)
return KTX_INVALID_VALUE;
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(This->dataSize);
if (This->pData == NULL)
return KTX_OUT_OF_MEMORY;
pDest = This->pData;
} else if (bufSize < This->dataSize) {
return KTX_INVALID_VALUE;
} else {
pDest = pBuffer;
}
// Need to loop through for correct byte swapping
for (miplevel = 0; miplevel < This->numLevels; ++miplevel)
{
ktx_uint32_t faceLodSize;
ktx_uint32_t faceLodSizePadded;
ktx_uint32_t face;
ktx_uint32_t innerIterations;
result = prtctd->_stream.read(&prtctd->_stream, &faceLodSize,
sizeof(ktx_uint32_t));
if (result != KTX_SUCCESS) {
goto cleanup;
}
if (private->_needSwap) {
_ktxSwapEndian32(&faceLodSize, 1);
}
#if (KTX_GL_UNPACK_ALIGNMENT != 4)
faceLodSizePadded = _KTX_PAD4(faceLodSize);
#else
faceLodSizePadded = faceLodSize;
#endif
if (This->isCubemap && !This->isArray)
innerIterations = This->numFaces;
else
innerIterations = 1;
for (face = 0; face < innerIterations; ++face)
{
result = prtctd->_stream.read(&prtctd->_stream, pDest,
faceLodSizePadded);
if (result != KTX_SUCCESS) {
goto cleanup;
}
/* Perform endianness conversion on texture data */
if (private->_needSwap) {
if (prtctd->_typeSize == 2)
_ktxSwapEndian16((ktx_uint16_t*)pDest, faceLodSize / 2);
else if (prtctd->_typeSize == 4)
_ktxSwapEndian32((ktx_uint32_t*)pDest, faceLodSize / 4);
}
pDest += faceLodSizePadded;
}
}
cleanup:
// No further need for This->
prtctd->_stream.destruct(&prtctd->_stream);
return result;
}
ktx_bool_t
ktxTexture1_NeedsTranscoding(ktxTexture1* This)
{
UNUSED(This);
return KTX_FALSE;
}
#if !KTX_FEATURE_WRITE
/*
* Stubs for writer functions that return a proper error code
*/
KTX_error_code
ktxTexture1_SetImageFromMemory(ktxTexture1* 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
ktxTexture1_SetImageFromStdioStream(ktxTexture1* 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
ktxTexture1_WriteToStdioStream(ktxTexture1* This, FILE* dstsstr)
{
UNUSED(This);
UNUSED(dstsstr);
return KTX_INVALID_OPERATION;
}
KTX_error_code
ktxTexture1_WriteToNamedFile(ktxTexture1* This, const char* const dstname)
{
UNUSED(This);
UNUSED(dstname);
return KTX_INVALID_OPERATION;
}
KTX_error_code
ktxTexture1_WriteToMemory(ktxTexture1* This,
ktx_uint8_t** ppDstBytes, ktx_size_t* pSize)
{
UNUSED(This);
UNUSED(ppDstBytes);
UNUSED(pSize);
return KTX_INVALID_OPERATION;
}
KTX_error_code
ktxTexture1_WriteToStream(ktxTexture1* 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
* these functions.
*/
struct ktxTexture_vtblInt ktxTexture1_vtblInt = {
(PFNCALCDATASIZELEVELS)ktxTexture1_calcDataSizeLevels,
(PFNCALCFACELODSIZE)ktxTexture1_calcFaceLodSize,
(PFNCALCLEVELOFFSET)ktxTexture1_calcLevelOffset
};
struct ktxTexture_vtbl ktxTexture1_vtbl = {
(PFNKTEXDESTROY)ktxTexture1_Destroy,
(PFNKTEXGETIMAGEOFFSET)ktxTexture1_GetImageOffset,
(PFNKTEXGETDATASIZEUNCOMPRESSED)ktxTexture1_GetDataSizeUncompressed,
(PFNKTEXGETIMAGESIZE)ktxTexture1_GetImageSize,
(PFNKTEXITERATELEVELS)ktxTexture1_IterateLevels,
(PFNKTEXITERATELOADLEVELFACES)ktxTexture1_IterateLoadLevelFaces,
(PFNKTEXNEEDSTRANSCODING)ktxTexture1_NeedsTranscoding,
(PFNKTEXLOADIMAGEDATA)ktxTexture1_LoadImageData,
(PFNKTEXSETIMAGEFROMMEMORY)ktxTexture1_SetImageFromMemory,
(PFNKTEXSETIMAGEFROMSTDIOSTREAM)ktxTexture1_SetImageFromStdioStream,
(PFNKTEXWRITETOSTDIOSTREAM)ktxTexture1_WriteToStdioStream,
(PFNKTEXWRITETONAMEDFILE)ktxTexture1_WriteToNamedFile,
(PFNKTEXWRITETOMEMORY)ktxTexture1_WriteToMemory,
(PFNKTEXWRITETOSTREAM)ktxTexture1_WriteToStream,
};
/** @} */
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