png_decoder.c File Reference

PNG Decoder component implementation. More...

Data Structures
struct	png_decoder_t
	PNG File Information Structure. More...

Functions
png_err_t	png_decoder_start (char *path, int max_width, int max_height, png_callback_t *callback, void *callback_data)
	Start decoding a PNG file.
void	png_decoder_abort (void)
	Abort the PNG decoding process.
float	png_decoder_get_progress (void)
	Get the progress of the PNG decoding process.
void	png_decoder_poll (void)
	Poll the PNG decoder to process the next row.

Detailed Description

PNG Decoder component implementation.

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Data Structure Documentation

png_decoder_t

struct png_decoder_t

PNG File Information Structure.

Data Fields
FILE *	f	File pointer
spng_ctx *	ctx	SPNG context
struct spng_ihdr	ihdr	SPNG image header
surface_t *	image	Image surface
uint8_t *	row_buffer	Row buffer
int	decoded_rows	Number of decoded rows
png_callback_t *	callback	Callback function
void *	callback_data	Callback data

Function Documentation

png_decoder_start()

png_err_t png_decoder_start	(	char *	path,
		int	max_width,
		int	max_height,
		png_callback_t *	callback,
		void *	callback_data )

Start decoding a PNG file.

Start the PNG decoding process.

Parameters

path	Path to the PNG file.
max_width	Maximum width of the image.
max_height	Maximum height of the image.
callback	Callback function to be called upon completion.
callback_data	Data to be passed to the callback function.

Returns

png_err_t Error code.

png_decoder_abort()

void png_decoder_abort

(

void

)

Abort the PNG decoding process.

This function aborts the ongoing PNG decoding process.

png_decoder_get_progress()

float png_decoder_get_progress

(

void

)

Get the progress of the PNG decoding process.

Returns

float Progress as a percentage.

png_decoder_poll()

void png_decoder_poll

(

void

)

Poll the PNG decoder to process the next row.

Poll the PNG decoder.