png.c File Reference

(v16)

#include <assert.h>
#include <stdbool.h>
#include <string.h>
#include "crc.h"
#include "png.h"

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Macros
#define	INT(l)   { l >> 24 & 0xff, l >> 16 & 0xff, l >> 8 & 0xff, l & 0xff }

Functions
int	png_iTXt_length (const char *keyword, const char *text)
	Determine length of a serialized PNG iTXt chunk.
bool	png_iTXt (const char *keyword, const char *text, unsigned char *chunk, int length)
	Serialize a PNG iTXt chunk.

Macro Definition Documentation

#define INT

(

l

)

{ l >> 24 & 0xff, l >> 16 & 0xff, l >> 8 & 0xff, l & 0xff }

Function Documentation

bool png_iTXt	(	const char *	keyword,
		const char *	text,
		unsigned char *	chunk,
		int	length
	)

Serialize a PNG iTXt chunk.

http://www.w3.org/TR/PNG/#5Chunk-layout http://www.w3.org/TR/PNG/#11iTXt

Parameters

keyword	The keyword for the chunk.
text	The text for the chunk.
chunk	Buffer for output.
length	Length of the buffer.

Returns

true if the buffer was large enough, false otherwise.

Definition at line 20 of file png.c.

References crc(), and INT.

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int png_iTXt_length	(	const char *	keyword,
		const char *	text
	)

Determine length of a serialized PNG iTXt chunk.

Parameters

keyword	The keyword for the chunk.
text	The text for the chunk.

Returns

The length of the chunk.

Definition at line 12 of file png.c.