lodepng.h File Reference

#include <string.h>

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Data Structures
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

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, 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	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 LodePNGDecompressSettings	lodepng_default_decompress_settings
const LodePNGCompressSettings	lodepng_default_compress_settings

Macro Definition Documentation

LODEPNG_COMPILE_ANCILLARY_CHUNKS

#define LODEPNG_COMPILE_ANCILLARY_CHUNKS

LODEPNG_COMPILE_DECODER

#define LODEPNG_COMPILE_DECODER

LODEPNG_COMPILE_DISK

#define LODEPNG_COMPILE_DISK

LODEPNG_COMPILE_ENCODER

#define LODEPNG_COMPILE_ENCODER

LODEPNG_COMPILE_ERROR_TEXT

#define LODEPNG_COMPILE_ERROR_TEXT

LODEPNG_COMPILE_PNG

#define LODEPNG_COMPILE_PNG

LODEPNG_COMPILE_ZLIB

#define LODEPNG_COMPILE_ZLIB

Enumeration Type Documentation

LodePNGColorType

enum LodePNGColorType

Enumerator
LCT_GREY
LCT_RGB
LCT_PALETTE
LCT_GREY_ALPHA
LCT_RGBA

LodePNGFilterStrategy

enum LodePNGFilterStrategy

Enumerator
LFS_ZERO
LFS_MINSUM
LFS_ENTROPY
LFS_BRUTE_FORCE
LFS_PREDEFINED

Function Documentation

get_color_profile()

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

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lodepng_add_itext()

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

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lodepng_add_text()

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

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lodepng_auto_choose_color()

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

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lodepng_can_have_alpha()

unsigned lodepng_can_have_alpha

(

const LodePNGColorMode *

info

)

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lodepng_chunk_ancillary()

unsigned char lodepng_chunk_ancillary

(

const unsigned char *

chunk

)

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lodepng_chunk_append()

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

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lodepng_chunk_check_crc()

unsigned lodepng_chunk_check_crc

(

const unsigned char *

chunk

)

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lodepng_chunk_create()

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

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lodepng_chunk_data()

unsigned char* lodepng_chunk_data

(

unsigned char *

chunk

)

lodepng_chunk_data_const()

const unsigned char* lodepng_chunk_data_const

(

const unsigned char *

chunk

)

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lodepng_chunk_generate_crc()

void lodepng_chunk_generate_crc

(

unsigned char *

chunk

)

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lodepng_chunk_length()

unsigned lodepng_chunk_length

(

const unsigned char *

chunk

)

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lodepng_chunk_next()

unsigned char* lodepng_chunk_next

(

unsigned char *

chunk

)

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lodepng_chunk_next_const()

const unsigned char* lodepng_chunk_next_const

(

const unsigned char *

chunk

)

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lodepng_chunk_private()

unsigned char lodepng_chunk_private

(

const unsigned char *

chunk

)

lodepng_chunk_safetocopy()

unsigned char lodepng_chunk_safetocopy

(

const unsigned char *

chunk

)

lodepng_chunk_type()

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

lodepng_chunk_type_equals()

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

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lodepng_clear_itext()

void lodepng_clear_itext

(

LodePNGInfo *

info

)

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lodepng_clear_text()

void lodepng_clear_text

(

LodePNGInfo *

info

)

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lodepng_color_mode_cleanup()

void lodepng_color_mode_cleanup

(

LodePNGColorMode *

info

)

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lodepng_color_mode_copy()

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

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lodepng_color_mode_init()

void lodepng_color_mode_init

(

LodePNGColorMode *

info

)

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lodepng_color_profile_init()

void lodepng_color_profile_init

(

LodePNGColorProfile *

profile

)

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lodepng_compress_settings_init()

void lodepng_compress_settings_init

(

LodePNGCompressSettings *

settings

)

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lodepng_convert()

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

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lodepng_crc32()

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

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lodepng_decode()

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

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lodepng_decode24()

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

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lodepng_decode24_file()

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

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lodepng_decode32()

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

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lodepng_decode32_file()

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

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lodepng_decode_file()

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

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lodepng_decode_memory()

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

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lodepng_decoder_settings_init()

void lodepng_decoder_settings_init

(

LodePNGDecoderSettings *

settings

)

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lodepng_decompress_settings_init()

void lodepng_decompress_settings_init

(

LodePNGDecompressSettings *

settings

)

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lodepng_deflate()

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

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lodepng_encode()

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

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lodepng_encode24()

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

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lodepng_encode24_file()

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

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lodepng_encode32()

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

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lodepng_encode32_file()

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

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lodepng_encode_file()

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

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lodepng_encode_memory()

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

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lodepng_encoder_settings_init()

void lodepng_encoder_settings_init

(

LodePNGEncoderSettings *

settings

)

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lodepng_error_text()

const char* lodepng_error_text

(

unsigned

code

)

lodepng_get_bpp()

unsigned lodepng_get_bpp

(

const LodePNGColorMode *

info

)

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lodepng_get_channels()

unsigned lodepng_get_channels

(

const LodePNGColorMode *

info

)

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lodepng_get_raw_size()

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

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lodepng_has_palette_alpha()

unsigned lodepng_has_palette_alpha

(

const LodePNGColorMode *

info

)

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lodepng_huffman_code_lengths()

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

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lodepng_inflate()

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

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lodepng_info_cleanup()

void lodepng_info_cleanup

(

LodePNGInfo *

info

)

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lodepng_info_copy()

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

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lodepng_info_init()

void lodepng_info_init

(

LodePNGInfo *

info

)

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lodepng_inspect()

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

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lodepng_is_alpha_type()

unsigned lodepng_is_alpha_type

(

const LodePNGColorMode *

info

)

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lodepng_is_greyscale_type()

unsigned lodepng_is_greyscale_type

(

const LodePNGColorMode *

info

)

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lodepng_is_palette_type()

unsigned lodepng_is_palette_type

(

const LodePNGColorMode *

info

)

lodepng_load_file()

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

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lodepng_palette_add()

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

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lodepng_palette_clear()

void lodepng_palette_clear

(

LodePNGColorMode *

info

)

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lodepng_save_file()

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

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lodepng_state_cleanup()

void lodepng_state_cleanup

(

LodePNGState *

state

)

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lodepng_state_copy()

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

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lodepng_state_init()

void lodepng_state_init

(

LodePNGState *

state

)

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lodepng_zlib_compress()

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

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lodepng_zlib_decompress()

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

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Variable Documentation

lodepng_default_compress_settings

const LodePNGCompressSettings lodepng_default_compress_settings

extern

lodepng_default_decompress_settings

const LodePNGDecompressSettings lodepng_default_decompress_settings

extern