#include "lodepng.h"
#include <winpr/wtypes.h>
#include <winpr/file.h>
#include <stdio.h>
#include <stdlib.h>

Macros
#define	VERSION_STRING "20140823"

#define	CERROR_BREAK(errorvar, code)

#define	ERROR_BREAK(code) CERROR_BREAK(error, code)

#define	CERROR_RETURN_ERROR(errorvar, code)

#define	CERROR_TRY_RETURN(call)

#define	READBIT(bitpointer, bitstream) ((bitstream[bitpointer >> 3] >> (bitpointer & 0x7)) & (unsigned char)1)

#define	FIRST_LENGTH_CODE_INDEX 257

#define	LAST_LENGTH_CODE_INDEX 285

#define	NUM_DEFLATE_CODE_SYMBOLS 288

#define	NUM_DISTANCE_SYMBOLS 32

#define	NUM_CODE_LENGTH_CODES 19

#define	DEFAULT_WINDOWSIZE 2048

Functions
static void	uivector_cleanup (void *p)

static unsigned	uivector_reserve (uivector *p, size_t allocsize)

static unsigned	uivector_resize (uivector *p, size_t size)

static unsigned	uivector_resizev (uivector *p, size_t size, unsigned value)

static void	uivector_init (uivector *p)

static unsigned	uivector_push_back (uivector *p, unsigned c)

static unsigned	uivector_copy (uivector p, const uivector q)

static void	ucvector_cleanup (void *p)

static unsigned	ucvector_reserve (ucvector *p, size_t allocsize)

static unsigned	ucvector_resize (ucvector *p, size_t size)

static void	ucvector_init (ucvector *p)

static unsigned	ucvector_resizev (ucvector *p, size_t size, unsigned char value)

static void	ucvector_init_buffer (ucvector p, unsigned char buffer, size_t size)

static unsigned	ucvector_push_back (ucvector *p, unsigned char c)

static void	string_cleanup (char **out)

static unsigned	string_resize (char **out, size_t size)

static void	string_init (char **out)

static void	string_set (char *out, const char in)

static unsigned	lodepng_read32bitInt (const unsigned char *buffer)

static void	lodepng_set32bitInt (unsigned char *buffer, unsigned value)

static int	lodepng_add32bitInt (ucvector *buffer, unsigned value)

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)

static int	addBitToStream (size_t bitpointer, ucvector bitstream, unsigned char bit)

static void	addBitsToStream (size_t bitpointer, ucvector bitstream, unsigned value, size_t nbits)

static void	addBitsToStreamReversed (size_t bitpointer, ucvector bitstream, unsigned value, size_t nbits)

static unsigned char	readBitFromStream (size_t bitpointer, const unsigned char bitstream)

static unsigned	readBitsFromStream (size_t bitpointer, const unsigned char bitstream, size_t nbits)

static void	HuffmanTree_init (HuffmanTree *tree)

static void	HuffmanTree_cleanup (HuffmanTree *tree)

static unsigned	HuffmanTree_make2DTree (HuffmanTree *tree)

static unsigned	HuffmanTree_makeFromLengths2 (HuffmanTree *tree)

static unsigned	HuffmanTree_makeFromLengths (HuffmanTree tree, const unsigned bitlen, size_t numcodes, unsigned maxbitlen)

static void	coin_init (Coin *c)

static void	coin_cleanup (void *c)

static void	coin_copy (Coin c1, const Coin c2)

static void	add_coins (Coin c1, const Coin c2)

static void	init_coins (Coin *coins, size_t num)

static void	cleanup_coins (Coin *coins, size_t num)

static int	coin_compare (const void a, const void b)

static unsigned	append_symbol_coins (Coin coins, const unsigned frequencies, unsigned numcodes, size_t sum)

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

static unsigned	HuffmanTree_makeFromFrequencies (HuffmanTree tree, const unsigned frequencies, size_t mincodes, size_t numcodes, unsigned maxbitlen)

static unsigned	HuffmanTree_getCode (const HuffmanTree *tree, unsigned index)

static unsigned	HuffmanTree_getLength (const HuffmanTree *tree, unsigned index)

static unsigned	generateFixedLitLenTree (HuffmanTree *tree)

static unsigned	generateFixedDistanceTree (HuffmanTree *tree)

static unsigned	huffmanDecodeSymbol (const unsigned char in, size_t bp, const HuffmanTree *codetree, size_t inbitlength)

static int	getTreeInflateFixed (HuffmanTree tree_ll, HuffmanTree tree_d)

static unsigned	getTreeInflateDynamic (HuffmanTree tree_ll, HuffmanTree tree_d, const unsigned char in, size_t bp, size_t inlength)

static unsigned	inflateHuffmanBlock (ucvector out, const unsigned char in, size_t bp, size_t pos, size_t inlength, unsigned btype)

static unsigned	inflateNoCompression (ucvector out, const unsigned char in, size_t bp, size_t pos, size_t inlength)

static unsigned	lodepng_inflatev (ucvector out, const unsigned char in, size_t insize, const LodePNGDecompressSettings *settings)

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

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

static void	addHuffmanSymbol (size_t bp, ucvector compressed, unsigned code, unsigned bitlen)

static size_t	searchCodeIndex (const unsigned *array, size_t array_size, size_t value)

static void	addLengthDistance (uivector *values, size_t length, size_t distance)

static unsigned	hash_init (Hash *hash, unsigned windowsize)

static void	hash_cleanup (Hash *hash)

static unsigned	getHash (const unsigned char *data, size_t size, size_t pos)

static unsigned	countZeros (const unsigned char *data, size_t size, size_t pos)

static void	updateHashChain (Hash *hash, size_t wpos, unsigned hashval, unsigned short numzeros)

static unsigned	encodeLZ77 (uivector out, Hash hash, const unsigned char *in, size_t inpos, size_t insize, unsigned windowsize, unsigned minmatch, unsigned nicematch, unsigned lazymatching)

static unsigned	deflateNoCompression (ucvector out, const unsigned char data, size_t datasize)

static void	writeLZ77data (size_t bp, ucvector out, const uivector lz77_encoded, const HuffmanTree tree_ll, const HuffmanTree *tree_d)

static unsigned	deflateDynamic (ucvector out, size_t bp, Hash hash, const unsigned char data, size_t datapos, size_t dataend, const LodePNGCompressSettings *settings, unsigned final)

static unsigned	deflateFixed (ucvector out, size_t bp, Hash hash, const unsigned char data, size_t datapos, size_t dataend, const LodePNGCompressSettings *settings, unsigned final)

static unsigned	lodepng_deflatev (ucvector out, const unsigned char in, size_t insize, const LodePNGCompressSettings *settings)

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

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

static unsigned	update_adler32 (unsigned adler, const unsigned char *data, unsigned len)

static unsigned	adler32 (const unsigned char *data, unsigned len)

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

static unsigned	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)

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

void	lodepng_compress_settings_init (LodePNGCompressSettings *settings)

void	lodepng_decompress_settings_init (LodePNGDecompressSettings *settings)

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

static unsigned char	readBitFromReversedStream (size_t bitpointer, const unsigned char bitstream)

static unsigned	readBitsFromReversedStream (size_t bitpointer, const unsigned char bitstream, size_t nbits)

static void	setBitOfReversedStream0 (size_t bitpointer, unsigned char bitstream, unsigned char bit)

static void	setBitOfReversedStream (size_t bitpointer, unsigned char bitstream, unsigned char bit)

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)

static unsigned	checkColorValidity (LodePNGColorType colortype, unsigned bd)

static unsigned	getNumColorChannels (LodePNGColorType colortype)

static unsigned	lodepng_get_bpp_lct (LodePNGColorType colortype, unsigned bitdepth)

void	lodepng_color_mode_init (LodePNGColorMode *info)

void	lodepng_color_mode_cleanup (LodePNGColorMode *info)

unsigned	lodepng_color_mode_copy (LodePNGColorMode dest, const LodePNGColorMode source)

static int	lodepng_color_mode_equal (const LodePNGColorMode a, const LodePNGColorMode b)

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)

static size_t	lodepng_get_raw_size_idat (unsigned w, unsigned h, const LodePNGColorMode *color)

static void	LodePNGUnknownChunks_init (LodePNGInfo *info)

static void	LodePNGUnknownChunks_cleanup (LodePNGInfo *info)

static unsigned	LodePNGUnknownChunks_copy (LodePNGInfo dest, const LodePNGInfo src)

static void	LodePNGText_init (LodePNGInfo *info)

static void	LodePNGText_cleanup (LodePNGInfo *info)

static unsigned	LodePNGText_copy (LodePNGInfo dest, const LodePNGInfo source)

void	lodepng_clear_text (LodePNGInfo *info)

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

static void	LodePNGIText_init (LodePNGInfo *info)

static void	LodePNGIText_cleanup (LodePNGInfo *info)

static unsigned	LodePNGIText_copy (LodePNGInfo dest, const LodePNGInfo source)

void	lodepng_clear_itext (LodePNGInfo *info)

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

void	lodepng_info_init (LodePNGInfo *info)

void	lodepng_info_cleanup (LodePNGInfo *info)

unsigned	lodepng_info_copy (LodePNGInfo dest, const LodePNGInfo source)

static void	addColorBits (unsigned char *out, size_t index, unsigned bits, unsigned in)

static void	color_tree_init (ColorTree *tree)

static void	color_tree_cleanup (ColorTree *tree)

static int	color_tree_get (ColorTree *tree, unsigned char r, unsigned char g, unsigned char b, unsigned char a)

static int	color_tree_has (ColorTree *tree, unsigned char r, unsigned char g, unsigned char b, unsigned char a)

static void	color_tree_add (ColorTree *tree, unsigned char r, unsigned char g, unsigned char b, unsigned char a, unsigned index)

static unsigned	rgba8ToPixel (unsigned char out, size_t i, const LodePNGColorMode mode, ColorTree *tree, unsigned char r, unsigned char g, unsigned char b, unsigned char a)

static void	rgba16ToPixel (unsigned char out, size_t i, const LodePNGColorMode mode, unsigned short r, unsigned short g, unsigned short b, unsigned short a)

static void	getPixelColorRGBA8 (unsigned char r, unsigned char g, unsigned char b, unsigned char a, const unsigned char in, size_t i, const LodePNGColorMode mode)

static void	getPixelColorsRGBA8 (unsigned char buffer, size_t numpixels, unsigned has_alpha, const unsigned char in, const LodePNGColorMode *mode)

static void	getPixelColorRGBA16 (unsigned short r, unsigned short g, unsigned short b, unsigned short a, const unsigned char in, size_t i, const LodePNGColorMode mode)

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

void	lodepng_color_profile_init (LodePNGColorProfile *profile)

static unsigned	getValueRequiredBits (unsigned char value)

unsigned	get_color_profile (LodePNGColorProfile profile, const unsigned char in, unsigned w, unsigned h, const LodePNGColorMode *mode)

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

static unsigned char	paethPredictor (short a, short b, short c)

static void	Adam7_getpassvalues (unsigned passw[7], unsigned passh[7], size_t filter_passstart[8], size_t padded_passstart[8], size_t passstart[8], unsigned w, unsigned h, unsigned bpp)

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

static unsigned	unfilterScanline (unsigned char recon, const unsigned char scanline, const unsigned char *precon, size_t bytewidth, unsigned char filterType, size_t length)

static unsigned	unfilter (unsigned char out, const unsigned char in, unsigned w, unsigned h, unsigned bpp)

static void	Adam7_deinterlace (unsigned char out, const unsigned char in, unsigned w, unsigned h, unsigned bpp)

static void	removePaddingBits (unsigned char out, const unsigned char in, size_t olinebits, size_t ilinebits, unsigned h)

static unsigned	postProcessScanlines (unsigned char out, unsigned char in, unsigned w, unsigned h, const LodePNGInfo *info_png)

static unsigned	readChunk_PLTE (LodePNGColorMode color, const unsigned char data, size_t chunkLength)

static unsigned	readChunk_tRNS (LodePNGColorMode color, const unsigned char data, size_t chunkLength)

static unsigned	readChunk_bKGD (LodePNGInfo info, const unsigned char data, size_t chunkLength)

static unsigned	readChunk_tEXt (LodePNGInfo info, const unsigned char data, size_t chunkLength)

static unsigned	readChunk_zTXt (LodePNGInfo info, const LodePNGDecompressSettings zlibsettings, const unsigned char *data, size_t chunkLength)

static unsigned	readChunk_iTXt (LodePNGInfo info, const LodePNGDecompressSettings zlibsettings, const unsigned char *data, size_t chunkLength)

static unsigned	readChunk_tIME (LodePNGInfo info, const unsigned char data, size_t chunkLength)

static unsigned	readChunk_pHYs (LodePNGInfo info, const unsigned char data, size_t chunkLength)

static void	decodeGeneric (unsigned char *out, unsigned w, unsigned h, LodePNGState state, const unsigned char *in, size_t insize)

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

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)

void	lodepng_decoder_settings_init (LodePNGDecoderSettings *settings)

void	lodepng_state_init (LodePNGState *state)

void	lodepng_state_cleanup (LodePNGState *state)

void	lodepng_state_copy (LodePNGState dest, const LodePNGState source)

static unsigned	addChunk (ucvector out, const char chunkName, const unsigned char *data, size_t length)

static unsigned	writeSignature (ucvector *out)

static unsigned	addChunk_IHDR (ucvector *out, unsigned w, unsigned h, LodePNGColorType colortype, unsigned bitdepth, unsigned interlace_method)

static unsigned	addChunk_PLTE (ucvector out, const LodePNGColorMode info)

static unsigned	addChunk_tRNS (ucvector out, const LodePNGColorMode info)

static unsigned	addChunk_IDAT (ucvector out, const unsigned char data, size_t datasize, LodePNGCompressSettings *zlibsettings)

static unsigned	addChunk_IEND (ucvector *out)

static unsigned	addChunk_tEXt (ucvector out, const char keyword, const char *textstring)

static unsigned	addChunk_zTXt (ucvector out, const char keyword, const char textstring, LodePNGCompressSettings zlibsettings)

static unsigned	addChunk_iTXt (ucvector out, unsigned compressed, const char keyword, const char langtag, const char transkey, const char textstring, LodePNGCompressSettings zlibsettings)

static unsigned	addChunk_bKGD (ucvector out, const LodePNGInfo info)

static unsigned	addChunk_tIME (ucvector out, const LodePNGTime time)

static unsigned	addChunk_pHYs (ucvector out, const LodePNGInfo info)

static void	filterScanline (unsigned char out, const unsigned char scanline, const unsigned char *prevline, size_t length, size_t bytewidth, unsigned char filterType)

static float	flog2 (float f)

static unsigned	filter (unsigned char out, const unsigned char in, unsigned w, unsigned h, const LodePNGColorMode info, const LodePNGEncoderSettings settings)

static void	addPaddingBits (unsigned char out, const unsigned char in, size_t olinebits, size_t ilinebits, unsigned h)

static void	Adam7_interlace (unsigned char out, const unsigned char in, unsigned w, unsigned h, unsigned bpp)

static unsigned	preProcessScanlines (unsigned char *out, size_t outsize, const unsigned char in, unsigned w, unsigned h, const LodePNGInfo info_png, const LodePNGEncoderSettings *settings)

static unsigned	getPaletteTranslucency (const unsigned char *palette, size_t palettesize)

static unsigned	addUnknownChunks (ucvector out, unsigned char data, size_t datasize)

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

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)

void	lodepng_encoder_settings_init (LodePNGEncoderSettings *settings)

const char *	lodepng_error_text (unsigned code)

Variables
static const unsigned	LENGTHBASE [29]

static const unsigned	LENGTHEXTRA [29]

static const unsigned	DISTANCEBASE [30]

static const unsigned	DISTANCEEXTRA [30]

static const unsigned	CLCL_ORDER [NUM_CODE_LENGTH_CODES]

static const size_t	MAX_SUPPORTED_DEFLATE_LENGTH = 258

static const unsigned	HASH_NUM_VALUES = 65536

static const unsigned	HASH_BIT_MASK

const LodePNGCompressSettings	lodepng_default_compress_settings

const LodePNGDecompressSettings	lodepng_default_decompress_settings = { 0, 0, 0, 0 }

static unsigned	lodepng_crc32_table [256]

static const unsigned	ADAM7_IX [7] = { 0, 4, 0, 2, 0, 1, 0 }

static const unsigned	ADAM7_IY [7] = { 0, 0, 4, 0, 2, 0, 1 }

static const unsigned	ADAM7_DX [7] = { 8, 8, 4, 4, 2, 2, 1 }

static const unsigned	ADAM7_DY [7] = { 8, 8, 8, 4, 4, 2, 2 }

Macro Definition Documentation

◆ CERROR_BREAK

#define CERROR_BREAK	(	errorvar,
		code
	)

Value:

        {                                \
                errorvar = code;             \
                break;                       \
        }

◆ CERROR_RETURN_ERROR

#define CERROR_RETURN_ERROR	(	errorvar,
		code
	)

Value:

        do                                      \
        {                                       \
                errorvar = code;                    \
                return code;                        \
        } while (0)

◆ CERROR_TRY_RETURN

#define CERROR_TRY_RETURN ( call )

Value:

        do                          \
        {                           \
                unsigned error = call;  \
                if (error)              \
                        return error;       \
        } while (0)

◆ DEFAULT_WINDOWSIZE

#define DEFAULT_WINDOWSIZE 2048

◆ ERROR_BREAK

#define ERROR_BREAK ( code ) CERROR_BREAK(error, code)

◆ FIRST_LENGTH_CODE_INDEX

#define FIRST_LENGTH_CODE_INDEX 257

◆ LAST_LENGTH_CODE_INDEX

#define LAST_LENGTH_CODE_INDEX 285

◆ NUM_CODE_LENGTH_CODES

#define NUM_CODE_LENGTH_CODES 19

◆ NUM_DEFLATE_CODE_SYMBOLS

#define NUM_DEFLATE_CODE_SYMBOLS 288

◆ NUM_DISTANCE_SYMBOLS

#define NUM_DISTANCE_SYMBOLS 32

◆ READBIT

#define READBIT	(	bitpointer,
		bitstream
	)	((bitstream[bitpointer >> 3] >> (bitpointer & 0x7)) & (unsigned char)1)

◆ VERSION_STRING

#define VERSION_STRING "20140823"

Function Documentation

◆ Adam7_deinterlace()

static void Adam7_deinterlace	(	unsigned char *	out,
		const unsigned char *	in,
		unsigned	w,
		unsigned	h,
		unsigned	bpp
	)

static

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◆ Adam7_getpassvalues()

static void Adam7_getpassvalues	(	unsigned	passw[7],
		unsigned	passh[7],
		size_t	filter_passstart[8],
		size_t	padded_passstart[8],
		size_t	passstart[8],
		unsigned	w,
		unsigned	h,
		unsigned	bpp
	)

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◆ Adam7_interlace()

static void Adam7_interlace	(	unsigned char *	out,
		const unsigned char *	in,
		unsigned	w,
		unsigned	h,
		unsigned	bpp
	)

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◆ add_coins()

static void add_coins	(	Coin *	c1,
		const Coin *	c2
	)

static

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◆ addBitsToStream()

static void addBitsToStream	(	size_t *	bitpointer,
		ucvector *	bitstream,
		unsigned	value,
		size_t	nbits
	)

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◆ addBitsToStreamReversed()

static void addBitsToStreamReversed	(	size_t *	bitpointer,
		ucvector *	bitstream,
		unsigned	value,
		size_t	nbits
	)

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◆ addBitToStream()

static int addBitToStream	(	size_t *	bitpointer,
		ucvector *	bitstream,
		unsigned char	bit
	)

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◆ addChunk()

static unsigned addChunk	(	ucvector *	out,
		const char *	chunkName,
		const unsigned char *	data,
		size_t	length
	)

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◆ addChunk_bKGD()

static unsigned addChunk_bKGD	(	ucvector *	out,
		const LodePNGInfo *	info
	)

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◆ addChunk_IDAT()

static unsigned addChunk_IDAT	(	ucvector *	out,
		const unsigned char *	data,
		size_t	datasize,
		LodePNGCompressSettings *	zlibsettings
	)

static

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◆ addChunk_IEND()

static unsigned addChunk_IEND ( ucvector * out )

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◆ addChunk_IHDR()

static unsigned addChunk_IHDR	(	ucvector *	out,
		unsigned	w,
		unsigned	h,
		LodePNGColorType	colortype,
		unsigned	bitdepth,
		unsigned	interlace_method
	)

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◆ addChunk_iTXt()

static unsigned addChunk_iTXt	(	ucvector *	out,
		unsigned	compressed,
		const char *	keyword,
		const char *	langtag,
		const char *	transkey,
		const char *	textstring,
		LodePNGCompressSettings *	zlibsettings
	)

static

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◆ addChunk_pHYs()

static unsigned addChunk_pHYs	(	ucvector *	out,
		const LodePNGInfo *	info
	)

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◆ addChunk_PLTE()

static unsigned addChunk_PLTE	(	ucvector *	out,
		const LodePNGColorMode *	info
	)

static

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◆ addChunk_tEXt()

static unsigned addChunk_tEXt	(	ucvector *	out,
		const char *	keyword,
		const char *	textstring
	)

static

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◆ addChunk_tIME()

static unsigned addChunk_tIME	(	ucvector *	out,
		const LodePNGTime *	time
	)

static

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◆ addChunk_tRNS()

static unsigned addChunk_tRNS	(	ucvector *	out,
		const LodePNGColorMode *	info
	)

static

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◆ addChunk_zTXt()

static unsigned addChunk_zTXt	(	ucvector *	out,
		const char *	keyword,
		const char *	textstring,
		LodePNGCompressSettings *	zlibsettings
	)

static

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◆ addColorBits()

static void addColorBits	(	unsigned char *	out,
		size_t	index,
		unsigned	bits,
		unsigned	in
	)

static

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◆ addHuffmanSymbol()

static void addHuffmanSymbol	(	size_t *	bp,
		ucvector *	compressed,
		unsigned	code,
		unsigned	bitlen
	)

static

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◆ addLengthDistance()

static void addLengthDistance	(	uivector *	values,
		size_t	length,
		size_t	distance
	)

static

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◆ addPaddingBits()

static void addPaddingBits	(	unsigned char *	out,
		const unsigned char *	in,
		size_t	olinebits,
		size_t	ilinebits,
		unsigned	h
	)

static

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◆ addUnknownChunks()

static unsigned addUnknownChunks	(	ucvector *	out,
		unsigned char *	data,
		size_t	datasize
	)

static

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◆ adler32()

static unsigned adler32	(	const unsigned char *	data,
		unsigned	len
	)

static

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◆ append_symbol_coins()

static unsigned append_symbol_coins	(	Coin *	coins,
		const unsigned *	frequencies,
		unsigned	numcodes,
		size_t	sum
	)

static

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◆ checkColorValidity()

static unsigned checkColorValidity	(	LodePNGColorType	colortype,
		unsigned	bd
	)

static

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◆ cleanup_coins()

static void cleanup_coins	(	Coin *	coins,
		size_t	num
	)

static

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◆ coin_cleanup()

static void coin_cleanup ( void * c )

static

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◆ coin_compare()

static int coin_compare	(	const void *	a,
		const void *	b
	)

static

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◆ coin_copy()

static void coin_copy	(	Coin *	c1,
		const Coin *	c2
	)

static

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◆ coin_init()

static void coin_init ( Coin * c )

static

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◆ color_tree_add()

static void color_tree_add	(	ColorTree *	tree,
		unsigned char	r,
		unsigned char	g,
		unsigned char	b,
		unsigned char	a,
		unsigned	index
	)

static

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◆ color_tree_cleanup()

static void color_tree_cleanup ( ColorTree * tree )

static

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◆ color_tree_get()

static int color_tree_get	(	ColorTree *	tree,
		unsigned char	r,
		unsigned char	g,
		unsigned char	b,
		unsigned char	a
	)

static

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◆ color_tree_has()

static int color_tree_has	(	ColorTree *	tree,
		unsigned char	r,
		unsigned char	g,
		unsigned char	b,
		unsigned char	a
	)

static

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◆ color_tree_init()

static void color_tree_init ( ColorTree * tree )

static

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◆ countZeros()

static unsigned countZeros	(	const unsigned char *	data,
		size_t	size,
		size_t	pos
	)

static

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◆ decodeGeneric()

static void decodeGeneric	(	unsigned char **	out,
		unsigned *	w,
		unsigned *	h,
		LodePNGState *	state,
		const unsigned char *	in,
		size_t	insize
	)

static

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◆ deflate()

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

static

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◆ deflateDynamic()

static unsigned deflateDynamic	(	ucvector *	out,
		size_t *	bp,
		Hash *	hash,
		const unsigned char *	data,
		size_t	datapos,
		size_t	dataend,
		const LodePNGCompressSettings *	settings,
		unsigned	final
	)

static

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◆ deflateFixed()

static unsigned deflateFixed	(	ucvector *	out,
		size_t *	bp,
		Hash *	hash,
		const unsigned char *	data,
		size_t	datapos,
		size_t	dataend,
		const LodePNGCompressSettings *	settings,
		unsigned	final
	)

static

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◆ deflateNoCompression()

static unsigned deflateNoCompression	(	ucvector *	out,
		const unsigned char *	data,
		size_t	datasize
	)

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◆ encodeLZ77()

static unsigned encodeLZ77	(	uivector *	out,
		Hash *	hash,
		const unsigned char *	in,
		size_t	inpos,
		size_t	insize,
		unsigned	windowsize,
		unsigned	minmatch,
		unsigned	nicematch,
		unsigned	lazymatching
	)

static

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◆ filter()

static unsigned filter	(	unsigned char *	out,
		const unsigned char *	in,
		unsigned	w,
		unsigned	h,
		const LodePNGColorMode *	info,
		const LodePNGEncoderSettings *	settings
	)

static

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◆ filterScanline()

static void filterScanline	(	unsigned char *	out,
		const unsigned char *	scanline,
		const unsigned char *	prevline,
		size_t	length,
		size_t	bytewidth,
		unsigned char	filterType
	)

static

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◆ flog2()

static float flog2 ( float f )

static

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◆ generateFixedDistanceTree()

static unsigned generateFixedDistanceTree ( HuffmanTree * tree )

static

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◆ generateFixedLitLenTree()

static unsigned generateFixedLitLenTree ( HuffmanTree * tree )

static

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◆ get_color_profile()

unsigned get_color_profile	(	LodePNGColorProfile *	profile,
		const unsigned char *	in,
		unsigned	w,
		unsigned	h,
		const LodePNGColorMode *	mode
	)

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◆ getHash()

static unsigned getHash	(	const unsigned char *	data,
		size_t	size,
		size_t	pos
	)

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◆ getNumColorChannels()

static unsigned getNumColorChannels ( LodePNGColorType colortype )

static

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◆ getPaletteTranslucency()

static unsigned getPaletteTranslucency	(	const unsigned char *	palette,
		size_t	palettesize
	)

static

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◆ getPixelColorRGBA16()

static void getPixelColorRGBA16	(	unsigned short *	r,
		unsigned short *	g,
		unsigned short *	b,
		unsigned short *	a,
		const unsigned char *	in,
		size_t	i,
		const LodePNGColorMode *	mode
	)

static

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◆ getPixelColorRGBA8()

static void getPixelColorRGBA8	(	unsigned char *	r,
		unsigned char *	g,
		unsigned char *	b,
		unsigned char *	a,
		const unsigned char *	in,
		size_t	i,
		const LodePNGColorMode *	mode
	)

static

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◆ getPixelColorsRGBA8()

static void getPixelColorsRGBA8	(	unsigned char *	buffer,
		size_t	numpixels,
		unsigned	has_alpha,
		const unsigned char *	in,
		const LodePNGColorMode *	mode
	)

static

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◆ getTreeInflateDynamic()

static unsigned getTreeInflateDynamic	(	HuffmanTree *	tree_ll,
		HuffmanTree *	tree_d,
		const unsigned char *	in,
		size_t *	bp,
		size_t	inlength
	)

static

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◆ getTreeInflateFixed()

static int getTreeInflateFixed	(	HuffmanTree *	tree_ll,
		HuffmanTree *	tree_d
	)

static

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◆ getValueRequiredBits()

static unsigned getValueRequiredBits ( unsigned char value )

static

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◆ hash_cleanup()

static void hash_cleanup ( Hash * hash )

static

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◆ hash_init()

static unsigned hash_init	(	Hash *	hash,
		unsigned	windowsize
	)

static

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◆ huffmanDecodeSymbol()

static unsigned huffmanDecodeSymbol	(	const unsigned char *	in,
		size_t *	bp,
		const HuffmanTree *	codetree,
		size_t	inbitlength
	)

static

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◆ HuffmanTree_cleanup()

static void HuffmanTree_cleanup ( HuffmanTree * tree )

static

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◆ HuffmanTree_getCode()

static unsigned HuffmanTree_getCode	(	const HuffmanTree *	tree,
		unsigned	index
	)

static

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◆ HuffmanTree_getLength()

static unsigned HuffmanTree_getLength	(	const HuffmanTree *	tree,
		unsigned	index
	)

static

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◆ HuffmanTree_init()

static void HuffmanTree_init ( HuffmanTree * tree )

static

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◆ HuffmanTree_make2DTree()

static unsigned HuffmanTree_make2DTree ( HuffmanTree * tree )

static

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◆ HuffmanTree_makeFromFrequencies()

static unsigned HuffmanTree_makeFromFrequencies	(	HuffmanTree *	tree,
		const unsigned *	frequencies,
		size_t	mincodes,
		size_t	numcodes,
		unsigned	maxbitlen
	)

static

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◆ HuffmanTree_makeFromLengths()

static unsigned HuffmanTree_makeFromLengths	(	HuffmanTree *	tree,
		const unsigned *	bitlen,
		size_t	numcodes,
		unsigned	maxbitlen
	)

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◆ HuffmanTree_makeFromLengths2()

static unsigned HuffmanTree_makeFromLengths2 ( HuffmanTree * tree )

static

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◆ inflate()

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

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◆ inflateHuffmanBlock()

static unsigned inflateHuffmanBlock	(	ucvector *	out,
		const unsigned char *	in,
		size_t *	bp,
		size_t *	pos,
		size_t	inlength,
		unsigned	btype
	)

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◆ inflateNoCompression()

static unsigned inflateNoCompression	(	ucvector *	out,
		const unsigned char *	in,
		size_t *	bp,
		size_t *	pos,
		size_t	inlength
	)

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◆ init_coins()

static void init_coins	(	Coin *	coins,
		size_t	num
	)

static

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◆ lodepng_add32bitInt()

static int lodepng_add32bitInt	(	ucvector *	buffer,
		unsigned	value
	)

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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_equal()

static int lodepng_color_mode_equal	(	const LodePNGColorMode *	a,
		const LodePNGColorMode *	b
	)

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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_deflatev()

static unsigned lodepng_deflatev	(	ucvector *	out,
		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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Macros

Functions

Variables

Macro Definition Documentation

◆ CERROR_BREAK

◆ CERROR_RETURN_ERROR

◆ CERROR_TRY_RETURN

◆ DEFAULT_WINDOWSIZE

◆ ERROR_BREAK

◆ FIRST_LENGTH_CODE_INDEX

◆ LAST_LENGTH_CODE_INDEX

◆ NUM_CODE_LENGTH_CODES

◆ NUM_DEFLATE_CODE_SYMBOLS

◆ NUM_DISTANCE_SYMBOLS

◆ READBIT

◆ VERSION_STRING

Function Documentation

◆ Adam7_deinterlace()

◆ Adam7_getpassvalues()

◆ Adam7_interlace()

◆ add_coins()

◆ addBitsToStream()

◆ addBitsToStreamReversed()

◆ addBitToStream()

◆ addChunk()

◆ addChunk_bKGD()

◆ addChunk_IDAT()

◆ addChunk_IEND()

◆ addChunk_IHDR()

◆ addChunk_iTXt()

◆ addChunk_pHYs()

◆ addChunk_PLTE()

◆ addChunk_tEXt()

◆ addChunk_tIME()

◆ addChunk_tRNS()

◆ addChunk_zTXt()

◆ addColorBits()

◆ addHuffmanSymbol()

◆ addLengthDistance()

◆ addPaddingBits()

◆ addUnknownChunks()

◆ adler32()

◆ append_symbol_coins()

◆ checkColorValidity()

◆ cleanup_coins()

◆ coin_cleanup()

◆ coin_compare()

◆ coin_copy()

◆ coin_init()

◆ color_tree_add()

◆ color_tree_cleanup()

◆ color_tree_get()

◆ color_tree_has()

◆ color_tree_init()

◆ countZeros()

◆ decodeGeneric()

◆ deflate()

◆ deflateDynamic()

◆ deflateFixed()

◆ deflateNoCompression()

◆ encodeLZ77()

◆ filter()

◆ filterScanline()

◆ flog2()

◆ generateFixedDistanceTree()

◆ generateFixedLitLenTree()

◆ get_color_profile()

◆ getHash()

◆ getNumColorChannels()

◆ getPaletteTranslucency()

◆ getPixelColorRGBA16()

◆ getPixelColorRGBA8()

◆ getPixelColorsRGBA8()

◆ getTreeInflateDynamic()

◆ getTreeInflateFixed()

◆ getValueRequiredBits()

◆ hash_cleanup()

◆ hash_init()

◆ huffmanDecodeSymbol()

◆ HuffmanTree_cleanup()