#if !defined(TEEGRIS_UPNG_H)

#define TEEGRIS_UPNG_H



typedef enum upng_error {

	UPNG_EOK			= 0, /* success (no error) */

	UPNG_ENOMEM			= 1, /* memory allocation failed */

	UPNG_ENOTFOUND		= 2, /* resource not found (file missing) */

	UPNG_ENOTPNG		= 3, /* image data does not have a PNG header */

	UPNG_EMALFORMED		= 4, /* image data is not a valid PNG image */

	UPNG_EUNSUPPORTED	= 5, /* critical PNG chunk type is not supported */

	UPNG_EUNINTERLACED	= 6, /* image interlacing is not supported */

	UPNG_EUNFORMAT		= 7, /* image color format is not supported */

	UPNG_EPARAM			= 8  /* invalid parameter to method call */

} upng_error;



typedef enum upng_format {

	UPNG_BADFORMAT,

	UPNG_RGB8,

	UPNG_RGB16,

	UPNG_RGBA8,

	UPNG_RGBA16,

	UPNG_LUMINANCE1,

	UPNG_LUMINANCE2,

	UPNG_LUMINANCE4,

	UPNG_LUMINANCE8,

	UPNG_LUMINANCE_ALPHA1,

	UPNG_LUMINANCE_ALPHA2,

	UPNG_LUMINANCE_ALPHA4,

	UPNG_LUMINANCE_ALPHA8

} upng_format;



typedef struct upng_t upng_t;



upng_t*		upng_new_from_bytes	(const unsigned char* buffer, unsigned long size);

upng_t*		upng_new_from_file	(const char* path);

void		upng_free			(upng_t* upng);



upng_error	upng_header			(upng_t* upng);

upng_error	upng_decode			(upng_t* upng);



upng_error	upng_get_error		(const upng_t* upng);

unsigned	upng_get_error_line	(const upng_t* upng);



unsigned	upng_get_width		(const upng_t* upng);

unsigned	upng_get_height		(const upng_t* upng);

unsigned	upng_get_bpp		(const upng_t* upng);

unsigned	upng_get_bitdepth	(const upng_t* upng);

unsigned	upng_get_components	(const upng_t* upng);

unsigned	upng_get_pixelsize	(const upng_t* upng);

upng_format	upng_get_format		(const upng_t* upng);



const unsigned char*	upng_get_buffer		(const upng_t* upng);

unsigned				upng_get_size		(const upng_t* upng);



#endif /*defined(TEEGRIS_UPNG_H)*/