enc_png.c File Reference

This program writes PNG stream to memory. More...

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <png.h>

Go to the source code of this file.

Typedefs
typedef long	g2int
	Long integer type. More...
typedef struct png_stream	png_stream
	location to write PNG stream. More...

Functions
int	SUB_NAME (char *data, g2int *width, g2int *height, g2int *nbits, char *pngbuf)
	create png_structs to write png stream into memory. More...
void	user_flush_data (png_structp png_ptr)
	Dummy Custom flush function. More...
void	user_write_data (png_structp png_ptr, png_bytep data, png_uint_32 length)
	Custom write function used to that libpng will write to memory location instead of a file on disk. More...

Detailed Description

This program writes PNG stream to memory.

Author

Stephen Gilbert

Definition in file enc_png.c.

Typedef Documentation

g2int

typedef long g2int

Long integer type.

Definition at line 15 of file enc_png.c.

png_stream

typedef struct png_stream png_stream

location to write PNG stream.

Definition at line 43 of file enc_png.c.

Function Documentation

SUB_NAME()

int SUB_NAME	(	char *	data,
		g2int *	width,
		g2int *	height,
		g2int *	nbits,
		char *	pngbuf
	)

create png_structs to write png stream into memory.

Parameters

data	data.
width	width.
height	height.
nbits	number of bits.
pngbuf	PNG buffer.

Returns

pnglen the length of png stream

Author

Stephen Gilbert

Definition at line 102 of file enc_png.c.

user_flush_data()

void user_flush_data

(

png_structp

png_ptr

)

Dummy Custom flush function.

Parameters

png_ptr

Pointer to PNG struct.

Author

Stephen Gilbert

Definition at line 83 of file enc_png.c.

user_write_data()

void user_write_data	(	png_structp	png_ptr,
		png_bytep	data,
		png_uint_32	length
	)

Custom write function used to that libpng will write to memory location instead of a file on disk.

Parameters

png_ptr	pointer
data	data
length	length

Author

Stephen Gilbert

Definition at line 59 of file enc_png.c.