lodepng.h File Reference

#include <string.h>

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Classes
struct	LodePNGDecompressSettings
struct	LodePNGCompressSettings
struct	LodePNGColorMode
struct	LodePNGTime
struct	LodePNGInfo
struct	LodePNGDecoderSettings
struct	LodePNGColorProfile
struct	LodePNGEncoderSettings
struct	LodePNGState

Macros
#define	LODEPNG_COMPILE_ZLIB
#define	LODEPNG_COMPILE_PNG
#define	LODEPNG_COMPILE_DECODER
#define	LODEPNG_COMPILE_ENCODER
#define	LODEPNG_COMPILE_DISK
#define	LODEPNG_COMPILE_ANCILLARY_CHUNKS
#define	LODEPNG_COMPILE_ERROR_TEXT
#define	LODEPNG_COMPILE_ALLOCATORS

Typedefs
typedef enum LodePNGColorType	LodePNGColorType
typedef struct LodePNGDecompressSettings	LodePNGDecompressSettings
typedef struct LodePNGCompressSettings	LodePNGCompressSettings
typedef struct LodePNGColorMode	LodePNGColorMode
typedef struct LodePNGTime	LodePNGTime
typedef struct LodePNGInfo	LodePNGInfo
typedef struct LodePNGDecoderSettings	LodePNGDecoderSettings
typedef enum LodePNGFilterStrategy	LodePNGFilterStrategy
typedef struct LodePNGColorProfile	LodePNGColorProfile
typedef struct LodePNGEncoderSettings	LodePNGEncoderSettings
typedef struct LodePNGState	LodePNGState

Enumerations
enum	LodePNGColorType {   LCT_GREY = 0, LCT_RGB = 2, LCT_PALETTE = 3, LCT_GREY_ALPHA = 4,   LCT_RGBA = 6 }
enum	LodePNGFilterStrategy {   LFS_ZERO, LFS_MINSUM, LFS_ENTROPY, LFS_BRUTE_FORCE,   LFS_PREDEFINED }

Functions
unsigned	lodepng_decode_memory (unsigned char **out, unsigned *w, unsigned *h, const unsigned char *in, size_t insize, LodePNGColorType colortype, unsigned bitdepth)
unsigned	lodepng_decode32 (unsigned char **out, unsigned *w, unsigned *h, const unsigned char *in, size_t insize)
unsigned	lodepng_decode24 (unsigned char **out, unsigned *w, unsigned *h, const unsigned char *in, size_t insize)
unsigned	lodepng_decode_file (unsigned char **out, unsigned *w, unsigned *h, const char *filename, LodePNGColorType colortype, unsigned bitdepth)
unsigned	lodepng_decode32_file (unsigned char **out, unsigned *w, unsigned *h, const char *filename)
unsigned	lodepng_decode24_file (unsigned char **out, unsigned *w, unsigned *h, const char *filename)
unsigned	lodepng_encode_memory (unsigned char **out, size_t *outsize, const unsigned char *image, unsigned w, unsigned h, LodePNGColorType colortype, unsigned bitdepth)
unsigned	lodepng_encode32 (unsigned char **out, size_t *outsize, const unsigned char *image, unsigned w, unsigned h)
unsigned	lodepng_encode24 (unsigned char **out, size_t *outsize, const unsigned char *image, unsigned w, unsigned h)
unsigned	lodepng_encode_file (const char *filename, const unsigned char *image, unsigned w, unsigned h, LodePNGColorType colortype, unsigned bitdepth)
unsigned	lodepng_encode32_file (const char *filename, const unsigned char *image, unsigned w, unsigned h)
unsigned	lodepng_encode24_file (const char *filename, const unsigned char *image, unsigned w, unsigned h)
const char *	lodepng_error_text (unsigned code)
void	lodepng_decompress_settings_init (LodePNGDecompressSettings *settings)
void	lodepng_compress_settings_init (LodePNGCompressSettings *settings)
void	lodepng_color_mode_init (LodePNGColorMode *info)
void	lodepng_color_mode_cleanup (LodePNGColorMode *info)
unsigned	lodepng_color_mode_copy (LodePNGColorMode *dest, const LodePNGColorMode *source)
void	lodepng_palette_clear (LodePNGColorMode *info)
unsigned	lodepng_palette_add (LodePNGColorMode *info, unsigned char r, unsigned char g, unsigned char b, unsigned char a)
unsigned	lodepng_get_bpp (const LodePNGColorMode *info)
unsigned	lodepng_get_channels (const LodePNGColorMode *info)
unsigned	lodepng_is_greyscale_type (const LodePNGColorMode *info)
unsigned	lodepng_is_alpha_type (const LodePNGColorMode *info)
unsigned	lodepng_is_palette_type (const LodePNGColorMode *info)
unsigned	lodepng_has_palette_alpha (const LodePNGColorMode *info)
unsigned	lodepng_can_have_alpha (const LodePNGColorMode *info)
size_t	lodepng_get_raw_size (unsigned w, unsigned h, const LodePNGColorMode *color)
void	lodepng_info_init (LodePNGInfo *info)
void	lodepng_info_cleanup (LodePNGInfo *info)
unsigned	lodepng_info_copy (LodePNGInfo *dest, const LodePNGInfo *source)
void	lodepng_clear_text (LodePNGInfo *info)
unsigned	lodepng_add_text (LodePNGInfo *info, const char *key, const char *str)
void	lodepng_clear_itext (LodePNGInfo *info)
unsigned	lodepng_add_itext (LodePNGInfo *info, const char *key, const char *langtag, const char *transkey, const char *str)
unsigned	lodepng_convert (unsigned char *out, const unsigned char *in, const LodePNGColorMode *mode_out, const LodePNGColorMode *mode_in, unsigned w, unsigned h)
void	lodepng_decoder_settings_init (LodePNGDecoderSettings *settings)
void	lodepng_color_profile_init (LodePNGColorProfile *profile)
unsigned	lodepng_get_color_profile (LodePNGColorProfile *profile, const unsigned char *image, unsigned w, unsigned h, const LodePNGColorMode *mode_in)
unsigned	lodepng_auto_choose_color (LodePNGColorMode *mode_out, const unsigned char *image, unsigned w, unsigned h, const LodePNGColorMode *mode_in)
void	lodepng_encoder_settings_init (LodePNGEncoderSettings *settings)
void	lodepng_state_init (LodePNGState *state)
void	lodepng_state_cleanup (LodePNGState *state)
void	lodepng_state_copy (LodePNGState *dest, const LodePNGState *source)
unsigned	lodepng_decode (unsigned char **out, unsigned *w, unsigned *h, LodePNGState *state, const unsigned char *in, size_t insize)
unsigned	lodepng_inspect (unsigned *w, unsigned *h, LodePNGState *state, const unsigned char *in, size_t insize)
unsigned	lodepng_encode (unsigned char **out, size_t *outsize, const unsigned char *image, unsigned w, unsigned h, LodePNGState *state)
unsigned	lodepng_chunk_length (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 char	lodepng_chunk_ancillary (const unsigned char *chunk)
unsigned char	lodepng_chunk_private (const unsigned char *chunk)
unsigned char	lodepng_chunk_safetocopy (const unsigned char *chunk)
unsigned char *	lodepng_chunk_data (unsigned char *chunk)
const unsigned char *	lodepng_chunk_data_const (const unsigned char *chunk)
unsigned	lodepng_chunk_check_crc (const unsigned char *chunk)
void	lodepng_chunk_generate_crc (unsigned char *chunk)
unsigned char *	lodepng_chunk_next (unsigned char *chunk)
const unsigned char *	lodepng_chunk_next_const (const unsigned char *chunk)
unsigned	lodepng_chunk_append (unsigned char **out, size_t *outlength, const unsigned char *chunk)
unsigned	lodepng_chunk_create (unsigned char **out, size_t *outlength, unsigned length, const char *type, const unsigned char *data)
unsigned	lodepng_crc32 (const unsigned char *buf, size_t len)
unsigned	lodepng_inflate (unsigned char **out, size_t *outsize, const unsigned char *in, size_t insize, const LodePNGDecompressSettings *settings)
unsigned	lodepng_zlib_decompress (unsigned char **out, size_t *outsize, const unsigned char *in, size_t insize, const LodePNGDecompressSettings *settings)
unsigned	lodepng_zlib_compress (unsigned char **out, size_t *outsize, const unsigned char *in, size_t insize, const LodePNGCompressSettings *settings)
unsigned	lodepng_huffman_code_lengths (unsigned *lengths, const unsigned *frequencies, size_t numcodes, unsigned maxbitlen)
unsigned	lodepng_deflate (unsigned char **out, size_t *outsize, const unsigned char *in, size_t insize, const LodePNGCompressSettings *settings)
unsigned	lodepng_load_file (unsigned char **out, size_t *outsize, const char *filename)
unsigned	lodepng_save_file (const unsigned char *buffer, size_t buffersize, const char *filename)

Variables
const char *	LODEPNG_VERSION_STRING
const LodePNGDecompressSettings	lodepng_default_decompress_settings
const LodePNGCompressSettings	lodepng_default_compress_settings

Macro Definition Documentation

#define LODEPNG_COMPILE_ZLIB

#define LODEPNG_COMPILE_PNG

#define LODEPNG_COMPILE_DECODER

#define LODEPNG_COMPILE_ENCODER

#define LODEPNG_COMPILE_DISK

#define LODEPNG_COMPILE_ANCILLARY_CHUNKS

#define LODEPNG_COMPILE_ERROR_TEXT

#define LODEPNG_COMPILE_ALLOCATORS

Typedef Documentation

typedef enum LodePNGColorType LodePNGColorType

typedef struct LodePNGDecompressSettings LodePNGDecompressSettings

typedef struct LodePNGCompressSettings LodePNGCompressSettings

typedef struct LodePNGColorMode LodePNGColorMode

typedef struct LodePNGTime LodePNGTime

typedef struct LodePNGInfo LodePNGInfo

typedef struct LodePNGDecoderSettings LodePNGDecoderSettings

typedef enum LodePNGFilterStrategy LodePNGFilterStrategy

typedef struct LodePNGColorProfile LodePNGColorProfile

typedef struct LodePNGEncoderSettings LodePNGEncoderSettings

typedef struct LodePNGState LodePNGState

Enumeration Type Documentation

enum LodePNGColorType

Enumerator
LCT_GREY
LCT_RGB
LCT_PALETTE
LCT_GREY_ALPHA
LCT_RGBA

enum LodePNGFilterStrategy

Enumerator
LFS_ZERO
LFS_MINSUM
LFS_ENTROPY
LFS_BRUTE_FORCE
LFS_PREDEFINED

Function Documentation

unsigned lodepng_decode_memory	(	unsigned char **	out,
		unsigned *	w,
		unsigned *	h,
		const unsigned char *	in,
		size_t	insize,
		LodePNGColorType	colortype,
		unsigned	bitdepth
	)

unsigned lodepng_decode32	(	unsigned char **	out,
		unsigned *	w,
		unsigned *	h,
		const unsigned char *	in,
		size_t	insize
	)

unsigned lodepng_decode24	(	unsigned char **	out,
		unsigned *	w,
		unsigned *	h,
		const unsigned char *	in,
		size_t	insize
	)

unsigned lodepng_decode_file	(	unsigned char **	out,
		unsigned *	w,
		unsigned *	h,
		const char *	filename,
		LodePNGColorType	colortype,
		unsigned	bitdepth
	)

unsigned lodepng_decode32_file	(	unsigned char **	out,
		unsigned *	w,
		unsigned *	h,
		const char *	filename
	)

unsigned lodepng_decode24_file	(	unsigned char **	out,
		unsigned *	w,
		unsigned *	h,
		const char *	filename
	)

unsigned lodepng_encode_memory	(	unsigned char **	out,
		size_t *	outsize,
		const unsigned char *	image,
		unsigned	w,
		unsigned	h,
		LodePNGColorType	colortype,
		unsigned	bitdepth
	)

unsigned lodepng_encode32	(	unsigned char **	out,
		size_t *	outsize,
		const unsigned char *	image,
		unsigned	w,
		unsigned	h
	)

unsigned lodepng_encode24	(	unsigned char **	out,
		size_t *	outsize,
		const unsigned char *	image,
		unsigned	w,
		unsigned	h
	)

unsigned lodepng_encode_file	(	const char *	filename,
		const unsigned char *	image,
		unsigned	w,
		unsigned	h,
		LodePNGColorType	colortype,
		unsigned	bitdepth
	)

unsigned lodepng_encode32_file	(	const char *	filename,
		const unsigned char *	image,
		unsigned	w,
		unsigned	h
	)

unsigned lodepng_encode24_file	(	const char *	filename,
		const unsigned char *	image,
		unsigned	w,
		unsigned	h
	)

const char* lodepng_error_text

(

unsigned

code

)

void lodepng_decompress_settings_init

(

LodePNGDecompressSettings *

settings

)

void lodepng_compress_settings_init

(

LodePNGCompressSettings *

settings

)

void lodepng_color_mode_init

(

LodePNGColorMode *

info

)

void lodepng_color_mode_cleanup

(

LodePNGColorMode *

info

)

unsigned lodepng_color_mode_copy	(	LodePNGColorMode *	dest,
		const LodePNGColorMode *	source
	)

void lodepng_palette_clear

(

LodePNGColorMode *

info

)

unsigned lodepng_palette_add	(	LodePNGColorMode *	info,
		unsigned char	r,
		unsigned char	g,
		unsigned char	b,
		unsigned char	a
	)

unsigned lodepng_get_bpp

(

const LodePNGColorMode *

info

)

unsigned lodepng_get_channels

(

const LodePNGColorMode *

info

)

unsigned lodepng_is_greyscale_type

(

const LodePNGColorMode *

info

)

unsigned lodepng_is_alpha_type

(

const LodePNGColorMode *

info

)

unsigned lodepng_is_palette_type

(

const LodePNGColorMode *

info

)

unsigned lodepng_has_palette_alpha

(

const LodePNGColorMode *

info

)

unsigned lodepng_can_have_alpha

(

const LodePNGColorMode *

info

)

size_t lodepng_get_raw_size	(	unsigned	w,
		unsigned	h,
		const LodePNGColorMode *	color
	)

void lodepng_info_init

(

LodePNGInfo *

info

)

void lodepng_info_cleanup

(

LodePNGInfo *

info

)

unsigned lodepng_info_copy	(	LodePNGInfo *	dest,
		const LodePNGInfo *	source
	)

void lodepng_clear_text

(

LodePNGInfo *

info

)

unsigned lodepng_add_text	(	LodePNGInfo *	info,
		const char *	key,
		const char *	str
	)

void lodepng_clear_itext

(

LodePNGInfo *

info

)

unsigned lodepng_add_itext	(	LodePNGInfo *	info,
		const char *	key,
		const char *	langtag,
		const char *	transkey,
		const char *	str
	)

unsigned lodepng_convert	(	unsigned char *	out,
		const unsigned char *	in,
		const LodePNGColorMode *	mode_out,
		const LodePNGColorMode *	mode_in,
		unsigned	w,
		unsigned	h
	)

void lodepng_decoder_settings_init

(

LodePNGDecoderSettings *

settings

)

void lodepng_color_profile_init

(

LodePNGColorProfile *

profile

)

unsigned lodepng_get_color_profile	(	LodePNGColorProfile *	profile,
		const unsigned char *	image,
		unsigned	w,
		unsigned	h,
		const LodePNGColorMode *	mode_in
	)

unsigned lodepng_auto_choose_color	(	LodePNGColorMode *	mode_out,
		const unsigned char *	image,
		unsigned	w,
		unsigned	h,
		const LodePNGColorMode *	mode_in
	)

void lodepng_encoder_settings_init

(

LodePNGEncoderSettings *

settings

)

void lodepng_state_init

(

LodePNGState *

state

)

void lodepng_state_cleanup

(

LodePNGState *

state

)

void lodepng_state_copy	(	LodePNGState *	dest,
		const LodePNGState *	source
	)

unsigned lodepng_decode	(	unsigned char **	out,
		unsigned *	w,
		unsigned *	h,
		LodePNGState *	state,
		const unsigned char *	in,
		size_t	insize
	)

unsigned lodepng_inspect	(	unsigned *	w,
		unsigned *	h,
		LodePNGState *	state,
		const unsigned char *	in,
		size_t	insize
	)

unsigned lodepng_encode	(	unsigned char **	out,
		size_t *	outsize,
		const unsigned char *	image,
		unsigned	w,
		unsigned	h,
		LodePNGState *	state
	)

unsigned lodepng_chunk_length

(

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 char lodepng_chunk_ancillary

(

const unsigned char *

chunk

)

unsigned char lodepng_chunk_private

(

const unsigned char *

chunk

)

unsigned char lodepng_chunk_safetocopy

(

const unsigned char *

chunk

)

unsigned char* lodepng_chunk_data

(

unsigned char *

chunk

)

const unsigned char* lodepng_chunk_data_const

(

const unsigned char *

chunk

)

unsigned lodepng_chunk_check_crc

(

const unsigned char *

chunk

)

void lodepng_chunk_generate_crc

(

unsigned char *

chunk

)

unsigned char* lodepng_chunk_next

(

unsigned char *

chunk

)

const unsigned char* lodepng_chunk_next_const

(

const unsigned char *

chunk

)

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

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

unsigned lodepng_crc32	(	const unsigned char *	buf,
		size_t	len
	)

unsigned lodepng_inflate	(	unsigned char **	out,
		size_t *	outsize,
		const unsigned char *	in,
		size_t	insize,
		const LodePNGDecompressSettings *	settings
	)

unsigned lodepng_zlib_decompress	(	unsigned char **	out,
		size_t *	outsize,
		const unsigned char *	in,
		size_t	insize,
		const LodePNGDecompressSettings *	settings
	)

unsigned lodepng_zlib_compress	(	unsigned char **	out,
		size_t *	outsize,
		const unsigned char *	in,
		size_t	insize,
		const LodePNGCompressSettings *	settings
	)

unsigned lodepng_huffman_code_lengths	(	unsigned *	lengths,
		const unsigned *	frequencies,
		size_t	numcodes,
		unsigned	maxbitlen
	)

unsigned lodepng_deflate	(	unsigned char **	out,
		size_t *	outsize,
		const unsigned char *	in,
		size_t	insize,
		const LodePNGCompressSettings *	settings
	)

unsigned lodepng_load_file	(	unsigned char **	out,
		size_t *	outsize,
		const char *	filename
	)

unsigned lodepng_save_file	(	const unsigned char *	buffer,
		size_t	buffersize,
		const char *	filename
	)

Variable Documentation

const char* LODEPNG_VERSION_STRING

const LodePNGDecompressSettings lodepng_default_decompress_settings

const LodePNGCompressSettings lodepng_default_compress_settings