Aufgabe 7: Anwendung

utils

contains a PNG library More...

#include "utils/png.h"
#include "utils/alloc.h"
#include "utils/string.h"
#include "fs/vfs.h"

Include dependency graph for png.cc:

Macros
#define	MAKE_BYTE(b) ((b) & 0xFF)

#define	MAKE_DWORD(a, b, c, d) ((MAKE_BYTE(a) << 24) \| (MAKE_BYTE(b) << 16) \| (MAKE_BYTE(c) << 8) \| MAKE_BYTE(d))

#define	MAKE_DWORD_PTR(p) MAKE_DWORD((p)[0], (p)[1], (p)[2], (p)[3])

#define	CHUNK_IHDR MAKE_DWORD('I', 'H', 'D', 'R')

#define	CHUNK_IDAT MAKE_DWORD('I', 'D', 'A', 'T')

#define	CHUNK_IEND MAKE_DWORD('I', 'E', 'N', 'D')

#define	FIRST_LENGTH_CODE_INDEX 257

#define	LAST_LENGTH_CODE_INDEX 285

#define	NUM_DEFLATE_CODE_SYMBOLS 288

#define	NUM_DISTANCE_SYMBOLS 32

#define	NUM_CODE_LENGTH_CODES 19

#define	MAX_SYMBOLS 288

#define	DEFLATE_CODE_BITLEN 15

#define	DISTANCE_BITLEN 15

#define	CODE_LENGTH_BITLEN 7

#define	MAX_BIT_LENGTH 15

#define	DEFLATE_CODE_BUFFER_SIZE (NUM_DEFLATE_CODE_SYMBOLS * 2)

#define	DISTANCE_BUFFER_SIZE (NUM_DISTANCE_SYMBOLS * 2)

#define	CODE_LENGTH_BUFFER_SIZE (NUM_DISTANCE_SYMBOLS * 2)

#define	SET_ERROR(code) do { error = (code); error_line = __LINE__; } while (0)

#define	chunk_length(chunk) MAKE_DWORD_PTR(chunk)

#define	chunk_type(chunk) MAKE_DWORD_PTR((chunk) + 4)

#define	chunk_critical(chunk) (((chunk)[4] & 32) == 0)

Detailed Description

contains a PNG library

The PNG library 'uPNG' was written by Sean Middleditch and Lode Vandevenne and modified for StuBS by Bernhard Heinloth.

See also: https://github.com/elanthis/upng

uPNG – derived from LodePNG version 20100808

This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software.

Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.

2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.

3. This notice may not be removed or altered from any source
distribution.

Macros

Detailed Description