LodePNG PNG Decoder

LodePNG is a PNG image decoder.

It is made for C (ISO C90), and has a C++ wrapper with a more convenient interface on top. More info at: http://members.gamedev.net/lode/projects/LodePNG/

Data Structures
struct	LodePNG_Decoder
struct	LodePNG_DecodeSettings
struct	LodePNG_InfoColor
struct	LodePNG_InfoPng
struct	LodePNG_InfoRaw
struct	LodePNG_IText
struct	LodePNG_Text
struct	LodePNG_Time
struct	LodePNG_UnknownChunks
struct	LodeZlib_DecompressSettings

Macros
#define	LODEPNG_COMPILE_ANCILLARY_CHUNKS   /*any code or struct datamember related to chunks other than IHDR, IDAT, PLTE, tRNS, IEND*/
#define	LODEPNG_COMPILE_DECODER   /*deflate&zlib decoder and png decoder*/
#define	LODEPNG_COMPILE_PNG   /*png encoder and png decoder*/
#define	LODEPNG_COMPILE_UNKNOWN_CHUNKS   /*handling of unknown chunks*/
#define	LODEPNG_COMPILE_ZLIB   /*deflate&zlib encoder and deflate&zlib decoder*/

Typedefs
typedef struct LodePNG_Decoder	LodePNG_Decoder
typedef struct LodePNG_DecodeSettings	LodePNG_DecodeSettings
typedef struct LodePNG_InfoColor	LodePNG_InfoColor
typedef struct LodePNG_InfoPng	LodePNG_InfoPng
typedef struct LodePNG_InfoRaw	LodePNG_InfoRaw
typedef struct LodePNG_IText	LodePNG_IText
typedef struct LodePNG_Text	LodePNG_Text
typedef struct LodePNG_Time	LodePNG_Time
typedef struct LodePNG_UnknownChunks	LodePNG_UnknownChunks
typedef struct LodeZlib_DecompressSettings	LodeZlib_DecompressSettings

Functions
unsigned	LodePNG_append_chunk (unsigned char **out, size_t *outlength, const unsigned char *chunk)
unsigned	LodePNG_chunk_check_crc (const unsigned char *chunk)
unsigned char	LodePNG_chunk_critical (const unsigned char *chunk)
unsigned char *	LodePNG_chunk_data (unsigned char *chunk)
const unsigned char *	LodePNG_chunk_data_const (const unsigned char *chunk)
void	LodePNG_chunk_generate_crc (unsigned char *chunk)
unsigned	LodePNG_chunk_length (const unsigned char *chunk)
unsigned char *	LodePNG_chunk_next (unsigned char *chunk)
const unsigned char *	LodePNG_chunk_next_const (const unsigned char *chunk)
unsigned char	LodePNG_chunk_private (const unsigned char *chunk)
unsigned char	LodePNG_chunk_safetocopy (const unsigned char *chunk)
void	LodePNG_chunk_type (char type[5], const unsigned char *chunk)
unsigned char	LodePNG_chunk_type_equals (const unsigned char *chunk, const char *type)
unsigned	LodePNG_convert (unsigned char *out, const unsigned char *in, LodePNG_InfoColor *infoOut, LodePNG_InfoColor *infoIn, unsigned w, unsigned h)
unsigned	LodePNG_create_chunk (unsigned char **out, size_t *outlength, unsigned length, const char *type, const unsigned char *data)
void	LodePNG_decode (LodePNG_Decoder *decoder, unsigned char **out, size_t *outsize, const unsigned char *in, size_t insize)
unsigned	LodePNG_decode32 (unsigned char **out, unsigned *w, unsigned *h, const unsigned char *in, size_t insize)
void	LodePNG_Decoder_cleanup (LodePNG_Decoder *decoder)
void	LodePNG_Decoder_copy (LodePNG_Decoder *dest, const LodePNG_Decoder *source)
void	LodePNG_Decoder_init (LodePNG_Decoder *decoder)
void	LodePNG_DecodeSettings_init (LodePNG_DecodeSettings *settings)
unsigned	LodePNG_InfoColor_addPalette (LodePNG_InfoColor *info, unsigned char r, unsigned char g, unsigned char b, unsigned char a)
void	LodePNG_InfoColor_cleanup (LodePNG_InfoColor *info)
void	LodePNG_InfoColor_clearPalette (LodePNG_InfoColor *info)
unsigned	LodePNG_InfoColor_copy (LodePNG_InfoColor *dest, const LodePNG_InfoColor *source)
unsigned	LodePNG_InfoColor_getBpp (const LodePNG_InfoColor *info)
unsigned	LodePNG_InfoColor_getChannels (const LodePNG_InfoColor *info)
void	LodePNG_InfoColor_init (LodePNG_InfoColor *info)
unsigned	LodePNG_InfoColor_isAlphaType (const LodePNG_InfoColor *info)
unsigned	LodePNG_InfoColor_isGreyscaleType (const LodePNG_InfoColor *info)
void	LodePNG_InfoPng_cleanup (LodePNG_InfoPng *info)
unsigned	LodePNG_InfoPng_copy (LodePNG_InfoPng *dest, const LodePNG_InfoPng *source)
void	LodePNG_InfoPng_init (LodePNG_InfoPng *info)
void	LodePNG_InfoRaw_cleanup (LodePNG_InfoRaw *info)
unsigned	LodePNG_InfoRaw_copy (LodePNG_InfoRaw *dest, const LodePNG_InfoRaw *source)
void	LodePNG_InfoRaw_init (LodePNG_InfoRaw *info)
void	LodePNG_inspect (LodePNG_Decoder *decoder, const unsigned char *in, size_t size)
unsigned	LodePNG_IText_add (LodePNG_IText *text, const char *key, const char *langtag, const char *transkey, const char *str)
void	LodePNG_IText_cleanup (LodePNG_IText *text)
void	LodePNG_IText_clear (LodePNG_IText *text)
unsigned	LodePNG_IText_copy (LodePNG_IText *dest, const LodePNG_IText *source)
void	LodePNG_IText_init (LodePNG_IText *text)
unsigned	LodePNG_Text_add (LodePNG_Text *text, const char *key, const char *str)
void	LodePNG_Text_cleanup (LodePNG_Text *text)
void	LodePNG_Text_clear (LodePNG_Text *text)
unsigned	LodePNG_Text_copy (LodePNG_Text *dest, const LodePNG_Text *source)
void	LodePNG_Text_init (LodePNG_Text *text)
void	LodePNG_UnknownChunks_cleanup (LodePNG_UnknownChunks *chunks)
unsigned	LodePNG_UnknownChunks_copy (LodePNG_UnknownChunks *dest, const LodePNG_UnknownChunks *src)
void	LodePNG_UnknownChunks_init (LodePNG_UnknownChunks *chunks)
unsigned	LodeZlib_decompress (unsigned char **out, size_t *outsize, const unsigned char *in, size_t insize, const LodeZlib_DecompressSettings *settings)
void	LodeZlib_DecompressSettings_init (LodeZlib_DecompressSettings *settings)

Variables
const LodeZlib_DecompressSettings	LodeZlib_defaultDecompressSettings

#define LODEPNG_COMPILE_ANCILLARY_CHUNKS   /*any code or struct datamember related to chunks other than IHDR, IDAT, PLTE, tRNS, IEND*/

#define LODEPNG_COMPILE_DECODER   /*deflate&zlib decoder and png decoder*/

#define LODEPNG_COMPILE_PNG   /*png encoder and png decoder*/

#define LODEPNG_COMPILE_UNKNOWN_CHUNKS   /*handling of unknown chunks*/

#define LODEPNG_COMPILE_ZLIB   /*deflate&zlib encoder and deflate&zlib decoder*/

typedef struct LodePNG_Decoder LodePNG_Decoder

typedef struct LodePNG_DecodeSettings LodePNG_DecodeSettings

typedef struct LodePNG_InfoColor LodePNG_InfoColor

typedef struct LodePNG_InfoPng LodePNG_InfoPng

typedef struct LodePNG_InfoRaw LodePNG_InfoRaw

typedef struct LodePNG_IText LodePNG_IText

typedef struct LodePNG_Text LodePNG_Text

typedef struct LodePNG_Time LodePNG_Time

typedef struct LodePNG_UnknownChunks LodePNG_UnknownChunks

typedef struct LodeZlib_DecompressSettings LodeZlib_DecompressSettings

unsigned LodePNG_append_chunk	(	unsigned char **	out,
		size_t *	outlength,
		const unsigned char *	chunk
	)

References i, and LodePNG_chunk_length().

Referenced by decodeGeneric().

unsigned LodePNG_chunk_check_crc

(

const unsigned char *

chunk

)

References Crc32_crc(), LodePNG_chunk_length(), and LodePNG_read32bitInt().

Referenced by decodeGeneric().

unsigned char LodePNG_chunk_critical

(

const unsigned char *

chunk

)

Referenced by decodeGeneric().

unsigned char* LodePNG_chunk_data

(

unsigned char *

chunk

)

const unsigned char* LodePNG_chunk_data_const

(

const unsigned char *

chunk

)

Referenced by decodeGeneric().

void LodePNG_chunk_generate_crc

(

unsigned char *

chunk

)

References Crc32_crc(), LodePNG_chunk_length(), and LodePNG_set32bitInt().

Referenced by LodePNG_create_chunk().

unsigned LodePNG_chunk_length

(

const unsigned char *

chunk

)

References LodePNG_read32bitInt().

Referenced by decodeGeneric(), LodePNG_append_chunk(), LodePNG_chunk_check_crc(), LodePNG_chunk_generate_crc(), LodePNG_chunk_next(), and LodePNG_chunk_next_const().

unsigned char* LodePNG_chunk_next

(

unsigned char *

chunk

)

References LodePNG_chunk_length().

const unsigned char* LodePNG_chunk_next_const

(

const unsigned char *

chunk

)

References LodePNG_chunk_length().

Referenced by decodeGeneric().

unsigned char LodePNG_chunk_private

(

const unsigned char *

chunk

)

unsigned char LodePNG_chunk_safetocopy

(

const unsigned char *

chunk

)

void LodePNG_chunk_type	(	char	type[5],
		const unsigned char *	chunk
	)

References i.

unsigned char LodePNG_chunk_type_equals	(	const unsigned char *	chunk,
		const char *	type
	)

Referenced by decodeGeneric().

unsigned LodePNG_convert	(	unsigned char *	out,
		const unsigned char *	in,
		LodePNG_InfoColor *	infoOut,
		LodePNG_InfoColor *	infoIn,
		unsigned	w,
		unsigned	h
	)

References LodePNG_InfoColor::bitDepth, c, LodePNG_InfoColor::colorType, i, LodePNG_InfoColor::key_b, LodePNG_InfoColor::key_defined, LodePNG_InfoColor::key_g, LodePNG_InfoColor::key_r, LodePNG_InfoColor_equal(), LodePNG_InfoColor_getBpp(), LodePNG_InfoColor_isAlphaType(), LodePNG_InfoColor_isGreyscaleType(), LodePNG_InfoColor::palette, LodePNG_InfoColor::palettesize, and readBitsFromReversedStream().

Referenced by LodePNG_decode().

unsigned LodePNG_create_chunk	(	unsigned char **	out,
		size_t *	outlength,
		unsigned	length,
		const char *	type,
		const unsigned char *	data
	)

References i, length, LodePNG_chunk_generate_crc(), and LodePNG_set32bitInt().

void LodePNG_decode	(	LodePNG_Decoder *	decoder,
		unsigned char **	out,
		size_t *	outsize,
		const unsigned char *	in,
		size_t	insize
	)

References LodePNG_InfoColor::bitDepth, LodePNG_InfoPng::color, LodePNG_InfoRaw::color, LodePNG_DecodeSettings::color_convert, LodePNG_InfoColor::colorType, decodeGeneric(), LodePNG_Decoder::error, LodePNG_InfoPng::height, LodePNG_Decoder::infoPng, LodePNG_Decoder::infoRaw, LodePNG_convert(), LodePNG_InfoColor_copy(), LodePNG_InfoColor_equal(), LodePNG_InfoColor_getBpp(), out, LodePNG_Decoder::settings, and LodePNG_InfoPng::width.

Referenced by LodePNG_decode32().

unsigned LodePNG_decode32	(	unsigned char **	out,
		unsigned *	w,
		unsigned *	h,
		const unsigned char *	in,
		size_t	insize
	)

References LodePNG_Decoder::error, LodePNG_InfoPng::height, LodePNG_Decoder::infoPng, LodePNG_decode(), LodePNG_Decoder_cleanup(), LodePNG_Decoder_init(), and LodePNG_InfoPng::width.

void LodePNG_Decoder_cleanup

(

LodePNG_Decoder *

decoder

)

References LodePNG_Decoder::infoPng, LodePNG_Decoder::infoRaw, LodePNG_InfoPng_cleanup(), and LodePNG_InfoRaw_cleanup().

Referenced by LodePNG_decode32(), and LodePNG_Decoder_copy().

void LodePNG_Decoder_copy	(	LodePNG_Decoder *	dest,
		const LodePNG_Decoder *	source
	)

References LodePNG_Decoder::error, LodePNG_Decoder::infoPng, LodePNG_Decoder::infoRaw, LodePNG_Decoder_cleanup(), LodePNG_InfoPng_copy(), LodePNG_InfoPng_init(), LodePNG_InfoRaw_copy(), and LodePNG_InfoRaw_init().

void LodePNG_Decoder_init

(

LodePNG_Decoder *

decoder

)

References LodePNG_Decoder::error, LodePNG_Decoder::infoPng, LodePNG_Decoder::infoRaw, LodePNG_DecodeSettings_init(), LodePNG_InfoPng_init(), LodePNG_InfoRaw_init(), and LodePNG_Decoder::settings.

Referenced by LodePNG_decode32().

void LodePNG_DecodeSettings_init

(

LodePNG_DecodeSettings *

settings

)

References LodePNG_DecodeSettings::color_convert, LodePNG_DecodeSettings::ignoreCrc, LodeZlib_DecompressSettings_init(), LodePNG_DecodeSettings::readTextChunks, LodePNG_DecodeSettings::rememberUnknownChunks, and LodePNG_DecodeSettings::zlibsettings.

Referenced by LodePNG_Decoder_init().

unsigned LodePNG_InfoColor_addPalette	(	LodePNG_InfoColor *	info,
		unsigned char	r,
		unsigned char	g,
		unsigned char	b,
		unsigned char	a
	)

References a(), b, data, LodePNG_InfoColor::palette, and LodePNG_InfoColor::palettesize.

void LodePNG_InfoColor_cleanup

(

LodePNG_InfoColor *

info

)

References LodePNG_InfoColor_clearPalette().

Referenced by LodePNG_InfoColor_copy(), LodePNG_InfoPng_cleanup(), and LodePNG_InfoRaw_cleanup().

void LodePNG_InfoColor_clearPalette

(

LodePNG_InfoColor *

info

)

References LodePNG_InfoColor::palette, and LodePNG_InfoColor::palettesize.

Referenced by LodePNG_InfoColor_cleanup().

unsigned LodePNG_InfoColor_copy	(	LodePNG_InfoColor *	dest,
		const LodePNG_InfoColor *	source
	)

References i, LodePNG_InfoColor_cleanup(), LodePNG_InfoColor::palette, and LodePNG_InfoColor::palettesize.

Referenced by LodePNG_decode(), LodePNG_InfoPng_copy(), and LodePNG_InfoRaw_copy().

unsigned LodePNG_InfoColor_getBpp

(

const LodePNG_InfoColor *

info

)

References LodePNG_InfoColor::bitDepth, LodePNG_InfoColor::colorType, and getBpp().

Referenced by decodeGeneric(), LodePNG_convert(), LodePNG_decode(), and postProcessScanlines().

unsigned LodePNG_InfoColor_getChannels

(

const LodePNG_InfoColor *

info

)

References LodePNG_InfoColor::colorType, and getNumColorChannels().

void LodePNG_InfoColor_init

(

LodePNG_InfoColor *

info

)

References LodePNG_InfoColor::bitDepth, LodePNG_InfoColor::colorType, LodePNG_InfoColor::key_b, LodePNG_InfoColor::key_defined, LodePNG_InfoColor::key_g, LodePNG_InfoColor::key_r, LodePNG_InfoColor::palette, and LodePNG_InfoColor::palettesize.

Referenced by LodePNG_InfoPng_copy(), LodePNG_InfoPng_init(), LodePNG_InfoRaw_copy(), and LodePNG_InfoRaw_init().

unsigned LodePNG_InfoColor_isAlphaType

(

const LodePNG_InfoColor *

info

)

References LodePNG_InfoColor::colorType.

Referenced by LodePNG_convert().

unsigned LodePNG_InfoColor_isGreyscaleType

(

const LodePNG_InfoColor *

info

)

References LodePNG_InfoColor::colorType.

Referenced by LodePNG_convert().

void LodePNG_InfoPng_cleanup

(

LodePNG_InfoPng *

info

)

References LodePNG_InfoPng::color, LodePNG_InfoPng::itext, LodePNG_InfoColor_cleanup(), LodePNG_IText_cleanup(), LodePNG_Text_cleanup(), LodePNG_UnknownChunks_cleanup(), LodePNG_InfoPng::text, and LodePNG_InfoPng::unknown_chunks.

Referenced by LodePNG_Decoder_cleanup(), LodePNG_InfoPng_copy(), and LodePNG_inspect().

unsigned LodePNG_InfoPng_copy	(	LodePNG_InfoPng *	dest,
		const LodePNG_InfoPng *	source
	)

References LodePNG_InfoPng::color, LodePNG_InfoPng::itext, LodePNG_InfoColor_copy(), LodePNG_InfoColor_init(), LodePNG_InfoPng_cleanup(), LodePNG_IText_copy(), LodePNG_Text_copy(), LodePNG_UnknownChunks_copy(), LodePNG_UnknownChunks_init(), LodePNG_InfoPng::text, and LodePNG_InfoPng::unknown_chunks.

Referenced by LodePNG_Decoder_copy().

void LodePNG_InfoPng_init

(

LodePNG_InfoPng *

info

)

References LodePNG_InfoPng::background_b, LodePNG_InfoPng::background_defined, LodePNG_InfoPng::background_g, LodePNG_InfoPng::background_r, LodePNG_InfoPng::color, LodePNG_InfoPng::compressionMethod, LodePNG_InfoPng::filterMethod, LodePNG_InfoPng::height, LodePNG_InfoPng::interlaceMethod, LodePNG_InfoPng::itext, LodePNG_InfoColor_init(), LodePNG_IText_init(), LodePNG_Text_init(), LodePNG_UnknownChunks_init(), LodePNG_InfoPng::phys_defined, LodePNG_InfoPng::text, LodePNG_InfoPng::time_defined, LodePNG_InfoPng::unknown_chunks, and LodePNG_InfoPng::width.

Referenced by LodePNG_Decoder_copy(), LodePNG_Decoder_init(), and LodePNG_inspect().

void LodePNG_InfoRaw_cleanup

(

LodePNG_InfoRaw *

info

)

References LodePNG_InfoRaw::color, and LodePNG_InfoColor_cleanup().

Referenced by LodePNG_Decoder_cleanup(), and LodePNG_InfoRaw_copy().

unsigned LodePNG_InfoRaw_copy	(	LodePNG_InfoRaw *	dest,
		const LodePNG_InfoRaw *	source
	)

References LodePNG_InfoRaw::color, LodePNG_InfoColor_copy(), LodePNG_InfoColor_init(), and LodePNG_InfoRaw_cleanup().

Referenced by LodePNG_Decoder_copy().

void LodePNG_InfoRaw_init

(

LodePNG_InfoRaw *

info

)

References LodePNG_InfoRaw::color, and LodePNG_InfoColor_init().

Referenced by LodePNG_Decoder_copy(), and LodePNG_Decoder_init().

void LodePNG_inspect	(	LodePNG_Decoder *	decoder,
		const unsigned char *	in,
		size_t	size
	)

References LodePNG_InfoColor::bitDepth, checkColorValidity(), LodePNG_InfoPng::color, LodePNG_InfoColor::colorType, LodePNG_InfoPng::compressionMethod, Crc32_crc(), LodePNG_Decoder::error, LodePNG_InfoPng::filterMethod, LodePNG_InfoPng::height, LodePNG_DecodeSettings::ignoreCrc, LodePNG_Decoder::infoPng, LodePNG_InfoPng::interlaceMethod, LodePNG_InfoPng_cleanup(), LodePNG_InfoPng_init(), LodePNG_read32bitInt(), LodePNG_Decoder::settings, and LodePNG_InfoPng::width.

Referenced by decodeGeneric().

unsigned LodePNG_IText_add	(	LodePNG_IText *	text,
		const char *	key,
		const char *	langtag,
		const char *	transkey,
		const char *	str
	)

References LodePNG_IText::keys, LodePNG_IText::langtags, LodePNG_IText::num, string_init(), string_set(), LodePNG_IText::strings, and LodePNG_IText::transkeys.

Referenced by decodeGeneric(), and LodePNG_IText_copy().

void LodePNG_IText_cleanup

(

LodePNG_IText *

text

)

References LodePNG_IText_clear().

Referenced by LodePNG_InfoPng_cleanup().

void LodePNG_IText_clear

(

LodePNG_IText *

text

)

References i, LodePNG_IText::keys, LodePNG_IText::langtags, LodePNG_IText::num, string_cleanup(), LodePNG_IText::strings, and LodePNG_IText::transkeys.

Referenced by LodePNG_IText_cleanup().

unsigned LodePNG_IText_copy	(	LodePNG_IText *	dest,
		const LodePNG_IText *	source
	)

References LodePNG_IText::keys, LodePNG_IText::langtags, LodePNG_IText_add(), LodePNG_IText::num, LodePNG_IText::strings, and LodePNG_IText::transkeys.

Referenced by LodePNG_InfoPng_copy().

void LodePNG_IText_init

(

LodePNG_IText *

text

)

References LodePNG_IText::keys, LodePNG_IText::langtags, NULL, LodePNG_IText::num, LodePNG_IText::strings, and LodePNG_IText::transkeys.

Referenced by LodePNG_InfoPng_init().

unsigned LodePNG_Text_add	(	LodePNG_Text *	text,
		const char *	key,
		const char *	str
	)

References LodePNG_Text::keys, LodePNG_Text::num, string_init(), string_set(), and LodePNG_Text::strings.

Referenced by decodeGeneric(), and LodePNG_Text_copy().

void LodePNG_Text_cleanup

(

LodePNG_Text *

text

)

References LodePNG_Text_clear().

Referenced by LodePNG_InfoPng_cleanup().

void LodePNG_Text_clear

(

LodePNG_Text *

text

)

References i, LodePNG_Text::keys, LodePNG_Text::num, string_cleanup(), and LodePNG_Text::strings.

Referenced by LodePNG_Text_cleanup().

unsigned LodePNG_Text_copy	(	LodePNG_Text *	dest,
		const LodePNG_Text *	source
	)

References LodePNG_Text::keys, LodePNG_Text_add(), LodePNG_Text::num, and LodePNG_Text::strings.

Referenced by LodePNG_InfoPng_copy().

void LodePNG_Text_init

(

LodePNG_Text *

text

)

References LodePNG_Text::keys, NULL, LodePNG_Text::num, and LodePNG_Text::strings.

Referenced by LodePNG_InfoPng_init().

void LodePNG_UnknownChunks_cleanup

(

LodePNG_UnknownChunks *

chunks

)

References LodePNG_UnknownChunks::data, and i.

Referenced by LodePNG_InfoPng_cleanup(), and LodePNG_UnknownChunks_copy().

unsigned LodePNG_UnknownChunks_copy	(	LodePNG_UnknownChunks *	dest,
		const LodePNG_UnknownChunks *	src
	)

References LodePNG_UnknownChunks::data, LodePNG_UnknownChunks::datasize, i, j, and LodePNG_UnknownChunks_cleanup().

Referenced by LodePNG_InfoPng_copy().

void LodePNG_UnknownChunks_init

(

LodePNG_UnknownChunks *

chunks

)

References LodePNG_UnknownChunks::data, LodePNG_UnknownChunks::datasize, and i.

Referenced by LodePNG_InfoPng_copy(), and LodePNG_InfoPng_init().

unsigned LodeZlib_decompress	(	unsigned char **	out,
		size_t *	outsize,
		const unsigned char *	in,
		size_t	insize,
		const LodeZlib_DecompressSettings *	settings
	)

References adler32(), ucvector::data, LodeZlib_DecompressSettings::ignoreAdler32, LodeFlate_inflate(), LodeZlib_read32bitInt(), ucvector::size, and ucvector_init_buffer().

Referenced by LodePNG_decompress().

void LodeZlib_DecompressSettings_init

(

LodeZlib_DecompressSettings *

settings

)

References LodeZlib_DecompressSettings::ignoreAdler32.

Referenced by LodePNG_DecodeSettings_init().

const LodeZlib_DecompressSettings LodeZlib_defaultDecompressSettings