/**
* @~English
* @brief Load a GL texture object from a stdio FILE stream.
*
* This function will unpack compressed GL_ETC1_RGB8_OES and GL_ETC2_* format
* textures in software when the format is not supported by the GL context,
* provided the library has been compiled with SUPPORT_SOFTWARE_ETC_UNPACK
* defined as 1.
*
* It will also convert texture with legacy formats to their modern equivalents
* when the format is not supported by the GL context, provided that the library
* has been compiled with SUPPORT_LEGACY_FORMAT_CONVERSION defined as 1.
*
* @param [in] file pointer to the stdio FILE stream from which to
* load.
* @param [in,out] pTexture name of the GL texture to load. If NULL or if
* <tt>*pTexture == 0</tt> the function will generate
* a texture name. The function binds either the
* generated name or the name given in @p *pTexture
* to the texture target returned in @p *pTarget,
* before loading the texture data. If @p pTexture
* is not NULL and a name was generated, the generated
* name will be returned in *pTexture.
* @param [out] pTarget @p *pTarget is set to the texture target used. The
* target is chosen based on the file contents.
* @param [out] pDimensions If @p pDimensions is not NULL, the width, height and
* depth of the texture's base level are returned in the
* fields of the KTX_dimensions structure to which it points.
* @param [out] pIsMipmapped
* If @p pIsMipmapped is not NULL, @p *pIsMipmapped is set
* to GL_TRUE if the KTX texture is mipmapped, GL_FALSE
* otherwise.
* @param [out] pGlerror @p *pGlerror is set to the value returned by
* glGetError when this function returns the error
* KTX_GL_ERROR. glerror can be NULL.
* @param [in,out] pKvdLen If not NULL, @p *pKvdLen is set to the number of bytes
* of key-value data pointed at by @p *ppKvd. Must not be
* NULL, if @p ppKvd is not NULL.
* @param [in,out] ppKvd If not NULL, @p *ppKvd is set to the point to a block of
* memory containing key-value data read from the file.
* The application is responsible for freeing the memory.
*
*
* @return KTX_SUCCESS on success, other KTX_* enum values on error.
*
* @exception KTX_INVALID_VALUE @p target is @c NULL or the size of a mip
* level is greater than the size of the
* preceding level.
* @exception KTX_INVALID_OPERATION @p ppKvd is not NULL but pKvdLen is NULL.
* @exception KTX_UNEXPECTED_END_OF_FILE the file does not contain the
* expected amount of data.
* @exception KTX_OUT_OF_MEMORY Sufficient memory could not be allocated to store
* the requested key-value data.
* @exception KTX_GL_ERROR A GL error was raised by glBindTexture,
* glGenTextures or gl*TexImage*. The GL error
* will be returned in @p *glerror, if glerror
* is not @c NULL.
*/
KTX_error_code
ktxLoadTextureF(FILE* file, GLuint* pTexture, GLenum* pTarget,
KTX_dimensions* pDimensions, GLboolean* pIsMipmapped,
GLenum* pGlerror,
unsigned int* pKvdLen, unsigned char** ppKvd)
{
struct ktxStream stream;
if (!ktxFileInit(&stream, file))
{
return KTX_FILE_OPEN_FAILED;
}
return ktxLoadTextureS(&stream, pTexture, pTarget, pDimensions, pIsMipmapped, pGlerror, pKvdLen, ppKvd);
}
/**
* @~English
* @brief Load a GL texture object from a stdio FILE stream.
*
* This function will unpack compressed GL_ETC1_RGB8_OES and GL_ETC2_* format
* textures in software when the format is not supported by the GL context,
* provided the library has been compiled with SUPPORT_SOFTWARE_ETC_UNPACK
* defined as 1.
*
* It will also convert texture with legacy formats to their modern equivalents
* when the format is not supported by the GL context, provided that the library
* has been compiled with SUPPORT_LEGACY_FORMAT_CONVERSION defined as 1.
*
* @param [in] file pointer to the stdio FILE stream from which to
* load.
* @param [in,out] pTexture name of the GL texture to load. If NULL or if
* <tt>*pTexture == 0</tt> the function will generate
* a texture name. The function binds either the
* generated name or the name given in @p *pTexture
* to the texture target returned in @p *pTarget,
* before loading the texture data. If @p pTexture
* is not NULL and a name was generated, the generated
* name will be returned in *pTexture.
* @param [out] pTarget @p *pTarget is set to the texture target used. The
* target is chosen based on the file contents.
* @param [out] pDimensions If @p pDimensions is not NULL, the width, height and
* depth of the texture's base level are returned in the
* fields of the KTX_dimensions structure to which it points.
* @param [out] pIsMipmapped
* If @p pIsMipmapped is not NULL, @p *pIsMipmapped is set
* to GL_TRUE if the KTX texture is mipmapped, GL_FALSE
* otherwise.
* @param [out] pGlerror @p *pGlerror is set to the value returned by
* glGetError when this function returns the error
* KTX_GL_ERROR. glerror can be NULL.
* @param [in,out] pKvdLen If not NULL, @p *pKvdLen is set to the number of bytes
* of key-value data pointed at by @p *ppKvd. Must not be
* NULL, if @p ppKvd is not NULL.
* @param [in,out] ppKvd If not NULL, @p *ppKvd is set to the point to a block of
* memory containing key-value data read from the file.
* The application is responsible for freeing the memory.
*
*
* @return KTX_SUCCESS on success, other KTX_* enum values on error.
*
* @exception KTX_INVALID_VALUE @p target is @c NULL or the size of a mip
* level is greater than the size of the
* preceding level.
* @exception KTX_INVALID_OPERATION @p ppKvd is not NULL but pKvdLen is NULL.
* @exception KTX_UNEXPECTED_END_OF_FILE the file does not contain the
* expected amount of data.
* @exception KTX_OUT_OF_MEMORY Sufficient memory could not be allocated to store
* the requested key-value data.
* @exception KTX_GL_ERROR A GL error was raised by glBindTexture,
* glGenTextures or gl*TexImage*. The GL error
* will be returned in @p *glerror, if glerror
* is not @c NULL.
*/
KTX_error_code
ktxLoadTextureF(FILE* file, GLuint* pTexture, GLenum* pTarget,
KTX_dimensions* pDimensions, GLboolean* pIsMipmapped,
GLenum* pGlerror,
unsigned int* pKvdLen, unsigned char** ppKvd)
{
struct ktxStream stream;
KTX_error_code errorCode = KTX_SUCCESS;
errorCode = ktxFileInit(&stream, file);
if (errorCode != KTX_SUCCESS)
return errorCode;
return ktxLoadTextureS(&stream, pTexture, pTarget, pDimensions, pIsMipmapped, pGlerror, pKvdLen, ppKvd);
}
/**
* @~English
* @brief Load a GL texture object from KTX formatted data in memory.
*
* @param [in] bytes pointer to the array of bytes containing
* the KTX format data to load.
* @param [in] size size of the memory array containing the
* KTX format data.
* @param [in,out] pTexture name of the GL texture to load. See
* ktxLoadTextureF() for details.
* @param [out] pTarget @p *pTarget is set to the texture target used. See
* ktxLoadTextureF() for details.
* @param [out] pDimensions @p the texture's base level width depth and height
* are returned in structure to which this points.
* See ktxLoadTextureF() for details.
* @param [out] pIsMipmapped @p *pIsMipMapped is set to indicate if the loaded
* texture is mipmapped. See ktxLoadTextureF() for
* details.
* @param [out] pGlerror @p *pGlerror is set to the value returned by
* glGetError when this function returns the error
* KTX_GL_ERROR. glerror can be NULL.
* @param [in,out] pKvdLen If not NULL, @p *pKvdLen is set to the number of bytes
* of key-value data pointed at by @p *ppKvd. Must not be
* NULL, if @p ppKvd is not NULL.
* @param [in,out] ppKvd If not NULL, @p *ppKvd is set to the point to a block of
* memory containing key-value data read from the file.
* The application is responsible for freeing the memory.*
*
* @return KTX_SUCCESS on success, other KTX_* enum values on error.
*
* @exception KTX_FILE_OPEN_FAILED The specified memory could not be opened as a file.
* @exception KTX_INVALID_VALUE See ktxLoadTextureF() for causes.
* @exception KTX_INVALID_OPERATION See ktxLoadTextureF() for causes.
* @exception KTX_UNEXPECTED_END_OF_FILE See ktxLoadTextureF() for causes.
*
* @exception KTX_GL_ERROR See ktxLoadTextureF() for causes.
*/
KTX_error_code
ktxLoadTextureM(const void* bytes, GLsizei size, GLuint* pTexture, GLenum* pTarget,
KTX_dimensions* pDimensions, GLboolean* pIsMipmapped,
GLenum* pGlerror,
unsigned int* pKvdLen, unsigned char** ppKvd)
{
struct ktxMem mem;
struct ktxStream stream;
if (!ktxMemInit(&stream, &mem, bytes, size))
{
return KTX_FILE_OPEN_FAILED;
}
return ktxLoadTextureS(&stream, pTexture, pTarget, pDimensions, pIsMipmapped, pGlerror, pKvdLen, ppKvd);
}
/**
* @~English
* @brief Load a GL texture object from KTX formatted data in memory.
*
* @param [in] bytes pointer to the array of bytes containing
* the KTX format data to load.
* @param [in] size size of the memory array containing the
* KTX format data.
* @param [in,out] pTexture name of the GL texture to load. See
* ktxLoadTextureF() for details.
* @param [out] pTarget @p *pTarget is set to the texture target used. See
* ktxLoadTextureF() for details.
* @param [out] pDimensions @p the texture's base level width depth and height
* are returned in structure to which this points.
* See ktxLoadTextureF() for details.
* @param [out] pIsMipmapped @p *pIsMipMapped is set to indicate if the loaded
* texture is mipmapped. See ktxLoadTextureF() for
* details.
* @param [out] pGlerror @p *pGlerror is set to the value returned by
* glGetError when this function returns the error
* KTX_GL_ERROR. glerror can be NULL.
* @param [in,out] pKvdLen If not NULL, @p *pKvdLen is set to the number of bytes
* of key-value data pointed at by @p *ppKvd. Must not be
* NULL, if @p ppKvd is not NULL.
* @param [in,out] ppKvd If not NULL, @p *ppKvd is set to the point to a block of
* memory containing key-value data read from the file.
* The application is responsible for freeing the memory.*
*
* @return KTX_SUCCESS on success, other KTX_* enum values on error.
*
* @exception KTX_FILE_OPEN_FAILED The specified memory could not be opened as a file.
* @exception KTX_INVALID_VALUE See ktxLoadTextureF() for causes.
* @exception KTX_INVALID_OPERATION See ktxLoadTextureF() for causes.
* @exception KTX_UNEXPECTED_END_OF_FILE See ktxLoadTextureF() for causes.
*
* @exception KTX_GL_ERROR See ktxLoadTextureF() for causes.
*/
KTX_error_code
ktxLoadTextureM(const void* bytes, GLsizei size, GLuint* pTexture, GLenum* pTarget,
KTX_dimensions* pDimensions, GLboolean* pIsMipmapped,
GLenum* pGlerror,
unsigned int* pKvdLen, unsigned char** ppKvd)
{
struct ktxMem mem;
struct ktxStream stream;
KTX_error_code errorCode = KTX_SUCCESS;
errorCode = ktxMemInit(&stream, &mem, bytes, size);
if (errorCode != KTX_SUCCESS)
return errorCode;
return ktxLoadTextureS(&stream, pTexture, pTarget, pDimensions, pIsMipmapped, pGlerror, pKvdLen, ppKvd);
}