png_decoder.h File Reference

PNG decoder. More...

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Typedefs
typedef void	png_callback_t(png_err_t err, surface_t *decoded_image, void *callback_data)
	PNG decoder callback type.

Enumerations
enum	png_err_t {   PNG_OK , PNG_ERR_INT , PNG_ERR_BUSY , PNG_ERR_OUT_OF_MEM ,   PNG_ERR_NO_FILE , PNG_ERR_BAD_FILE }
	PNG decoder errors. More...

Functions
png_err_t	png_decoder_start (char *path, int max_width, int max_height, png_callback_t *callback, void *callback_data)
	Start the PNG decoding process.
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.

Detailed Description

PNG decoder.

Typedef Documentation

png_callback_t

typedef void png_callback_t(png_err_t err, surface_t *decoded_image, void *callback_data)

PNG decoder callback type.

This typedef defines the callback function type used by the PNG decoder.

Parameters

err	Error code indicating the result of the decoding process.
decoded_image	Pointer to the decoded image surface.
callback_data	User-defined data passed to the callback function.

Enumeration Type Documentation

png_err_t

enum png_err_t

PNG decoder errors.

Enumeration for different types of errors that can occur in the PNG decoder.

Enumerator
PNG_OK	No error
PNG_ERR_INT	Internal error
PNG_ERR_BUSY	Decoder is busy
PNG_ERR_OUT_OF_MEM	Out of memory error
PNG_ERR_NO_FILE	No file found error
PNG_ERR_BAD_FILE	Bad file error

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 the PNG decoding process.

This function starts the PNG decoding process for the specified file.

Parameters

path	Path to the PNG file.
max_width	Maximum width of the decoded image.
max_height	Maximum height of the decoded image.
callback	Callback function to be called when decoding is complete.
callback_data	User-defined data to be passed to the callback function.

Returns

png_err_t Error code indicating the result of the start operation.

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.

This function returns the current progress of the PNG decoding process as a percentage.

Returns

float Current progress of the decoding process (0.0 to 100.0).

float Progress as a percentage.

png_decoder_poll()

void png_decoder_poll

(

void

)

Poll the PNG decoder.

This function polls the PNG decoder to handle any ongoing decoding tasks.

Poll the PNG decoder.