rpng.c File Reference

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <boolean.h>
#include <formats/image.h>
#include <formats/rpng.h>
#include <streams/trans_stream.h>
#include <string/stdstring.h>
#include "rpng_internal.h"

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Classes
struct	adam7_pass
struct	idat_buffer
struct	png_chunk
struct	rpng_process
struct	rpng

Enumerations
enum	png_ihdr_color_type {   PNG_IHDR_COLOR_GRAY = 0, PNG_IHDR_COLOR_RGB = 2, PNG_IHDR_COLOR_PLT = 3, PNG_IHDR_COLOR_GRAY_ALPHA = 4,   PNG_IHDR_COLOR_RGBA = 6 }
enum	png_line_filter {   PNG_FILTER_NONE = 0, PNG_FILTER_SUB, PNG_FILTER_UP, PNG_FILTER_AVERAGE,   PNG_FILTER_PAETH }
enum	png_chunk_type {   PNG_CHUNK_NOOP = 0, PNG_CHUNK_ERROR, PNG_CHUNK_IHDR, PNG_CHUNK_IDAT,   PNG_CHUNK_PLTE, PNG_CHUNK_tRNS, PNG_CHUNK_IEND }

Functions
static INLINE uint32_t	dword_be (const uint8_t *buf)
static enum png_chunk_type	png_chunk_type (const struct png_chunk *chunk)
static bool	png_process_ihdr (struct png_ihdr *ihdr)
static void	png_reverse_filter_copy_line_rgb (uint32_t *data, const uint8_t *decoded, unsigned width, unsigned bpp)
static void	png_reverse_filter_copy_line_rgba (uint32_t *data, const uint8_t *decoded, unsigned width, unsigned bpp)
static void	png_reverse_filter_copy_line_bw (uint32_t *data, const uint8_t *decoded, unsigned width, unsigned depth)
static void	png_reverse_filter_copy_line_gray_alpha (uint32_t *data, const uint8_t *decoded, unsigned width, unsigned bpp)
static void	png_reverse_filter_copy_line_plt (uint32_t *data, const uint8_t *decoded, unsigned width, unsigned depth, const uint32_t *palette)
static void	png_pass_geom (const struct png_ihdr *ihdr, unsigned width, unsigned height, unsigned *bpp_out, unsigned *pitch_out, size_t *pass_size)
static void	png_reverse_filter_adam7_deinterlace_pass (uint32_t *data, const struct png_ihdr *ihdr, const uint32_t *input, unsigned pass_width, unsigned pass_height, const struct adam7_pass *pass)
static void	png_reverse_filter_deinit (struct rpng_process *pngp)
static int	png_reverse_filter_init (const struct png_ihdr *ihdr, struct rpng_process *pngp)
static int	png_reverse_filter_copy_line (uint32_t *data, const struct png_ihdr *ihdr, struct rpng_process *pngp, unsigned filter)
static int	png_reverse_filter_regular_iterate (uint32_t **data, const struct png_ihdr *ihdr, struct rpng_process *pngp)
static int	png_reverse_filter_adam7_iterate (uint32_t **data_, const struct png_ihdr *ihdr, struct rpng_process *pngp)
static int	png_reverse_filter_adam7 (uint32_t **data_, const struct png_ihdr *ihdr, struct rpng_process *pngp)
static int	png_reverse_filter_iterate (rpng_t *rpng, uint32_t **data)
static int	rpng_load_image_argb_process_inflate_init (rpng_t *rpng, uint32_t **data, unsigned *width, unsigned *height)
static bool	png_read_plte (uint8_t *buf, uint32_t *buffer, unsigned entries)
static bool	png_read_trns (uint8_t *buf, uint32_t *palette, unsigned entries)
bool	png_realloc_idat (const struct png_chunk *chunk, struct idat_buffer *buf)
static struct rpng_process *	rpng_process_init (rpng_t *rpng, unsigned *width, unsigned *height)
static bool	read_chunk_header (uint8_t *buf, struct png_chunk *chunk)
static bool	png_parse_ihdr (uint8_t *buf, struct png_ihdr *ihdr)
bool	rpng_iterate_image (rpng_t *rpng)
int	rpng_process_image (rpng_t *rpng, void **_data, size_t size, unsigned *width, unsigned *height)
void	rpng_free (rpng_t *rpng)
bool	rpng_start (rpng_t *rpng)
bool	rpng_is_valid (rpng_t *rpng)
bool	rpng_set_buf_ptr (rpng_t *rpng, void *data)
rpng_t *	rpng_alloc (void)

Variables
static const struct adam7_pass	passes []

Enumeration Type Documentation

png_chunk_type

enum png_chunk_type

Enumerator
PNG_CHUNK_NOOP
PNG_CHUNK_ERROR
PNG_CHUNK_IHDR
PNG_CHUNK_IDAT
PNG_CHUNK_PLTE
PNG_CHUNK_tRNS
PNG_CHUNK_IEND

png_ihdr_color_type

enum png_ihdr_color_type

Enumerator
PNG_IHDR_COLOR_GRAY
PNG_IHDR_COLOR_RGB
PNG_IHDR_COLOR_PLT
PNG_IHDR_COLOR_GRAY_ALPHA
PNG_IHDR_COLOR_RGBA

png_line_filter

enum png_line_filter

Enumerator
PNG_FILTER_NONE
PNG_FILTER_SUB
PNG_FILTER_UP
PNG_FILTER_AVERAGE
PNG_FILTER_PAETH

Function Documentation

dword_be()

static INLINE uint32_t dword_be ( const uint8_t *  buf )

static

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png_chunk_type()

static enum png_chunk_type png_chunk_type ( const struct png_chunk *  chunk )

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png_parse_ihdr()

static bool png_parse_ihdr ( uint8_t *  buf, struct png_ihdr *  ihdr  )

static

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png_pass_geom()

static void png_pass_geom ( const struct png_ihdr *  ihdr, unsigned  width, unsigned  height, unsigned *  bpp_out, unsigned *  pitch_out, size_t *  pass_size  )

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png_process_ihdr()

static bool png_process_ihdr ( struct png_ihdr *  ihdr )

static

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png_read_plte()

static bool png_read_plte ( uint8_t *  buf, uint32_t *  buffer, unsigned  entries  )

static

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png_read_trns()

static bool png_read_trns ( uint8_t *  buf, uint32_t *  palette, unsigned  entries  )

static

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png_realloc_idat()

bool png_realloc_idat	(	const struct png_chunk *	chunk,
		struct idat_buffer *	buf
	)

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png_reverse_filter_adam7()

static int png_reverse_filter_adam7 ( uint32_t **  data_, const struct png_ihdr *  ihdr, struct rpng_process *  pngp  )

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png_reverse_filter_adam7_deinterlace_pass()

static void png_reverse_filter_adam7_deinterlace_pass ( uint32_t *  data, const struct png_ihdr *  ihdr, const uint32_t *  input, unsigned  pass_width, unsigned  pass_height, const struct adam7_pass *  pass  )

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png_reverse_filter_adam7_iterate()

static int png_reverse_filter_adam7_iterate ( uint32_t **  data_, const struct png_ihdr *  ihdr, struct rpng_process *  pngp  )

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png_reverse_filter_copy_line()

static int png_reverse_filter_copy_line ( uint32_t *  data, const struct png_ihdr *  ihdr, struct rpng_process *  pngp, unsigned  filter  )

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png_reverse_filter_copy_line_bw()

static void png_reverse_filter_copy_line_bw ( uint32_t *  data, const uint8_t *  decoded, unsigned  width, unsigned  depth  )

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png_reverse_filter_copy_line_gray_alpha()

static void png_reverse_filter_copy_line_gray_alpha ( uint32_t *  data, const uint8_t *  decoded, unsigned  width, unsigned  bpp  )

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png_reverse_filter_copy_line_plt()

static void png_reverse_filter_copy_line_plt ( uint32_t *  data, const uint8_t *  decoded, unsigned  width, unsigned  depth, const uint32_t *  palette  )

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png_reverse_filter_copy_line_rgb()

static void png_reverse_filter_copy_line_rgb ( uint32_t *  data, const uint8_t *  decoded, unsigned  width, unsigned  bpp  )

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png_reverse_filter_copy_line_rgba()

static void png_reverse_filter_copy_line_rgba ( uint32_t *  data, const uint8_t *  decoded, unsigned  width, unsigned  bpp  )

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png_reverse_filter_deinit()

static void png_reverse_filter_deinit ( struct rpng_process *  pngp )

static

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png_reverse_filter_init()

static int png_reverse_filter_init ( const struct png_ihdr *  ihdr, struct rpng_process *  pngp  )

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png_reverse_filter_iterate()

static int png_reverse_filter_iterate ( rpng_t *  rpng, uint32_t **  data  )

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png_reverse_filter_regular_iterate()

static int png_reverse_filter_regular_iterate ( uint32_t **  data, const struct png_ihdr *  ihdr, struct rpng_process *  pngp  )

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read_chunk_header()

static bool read_chunk_header ( uint8_t *  buf, struct png_chunk *  chunk  )

static

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rpng_alloc()

rpng_t* rpng_alloc

(

void

)

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rpng_free()

void rpng_free

(

rpng_t *

rpng

)

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rpng_is_valid()

bool rpng_is_valid

(

rpng_t *

rpng

)

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rpng_iterate_image()

bool rpng_iterate_image

(

rpng_t *

rpng

)

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rpng_load_image_argb_process_inflate_init()

static int rpng_load_image_argb_process_inflate_init ( rpng_t *  rpng, uint32_t **  data, unsigned *  width, unsigned *  height  )

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rpng_process_image()

int rpng_process_image	(	rpng_t *	rpng,
		void **	_data,
		size_t	size,
		unsigned *	width,
		unsigned *	height
	)

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rpng_process_init()

static struct rpng_process* rpng_process_init ( rpng_t *  rpng, unsigned *  width, unsigned *  height  )

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rpng_set_buf_ptr()

bool rpng_set_buf_ptr	(	rpng_t *	rpng,
		void *	data
	)

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rpng_start()

bool rpng_start

(

rpng_t *

rpng

)

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Variable Documentation

passes

const struct adam7_pass passes[]

static

Initial value:

= {
 { 0, 0, 8, 8 },
 { 4, 0, 8, 8 },
 { 0, 4, 4, 8 },
 { 2, 0, 4, 4 },
 { 0, 2, 2, 4 },
 { 1, 0, 2, 2 },
 { 0, 1, 1, 2 },
}