mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-11-28 12:07:10 +01:00
170 lines
3.4 KiB
C
170 lines
3.4 KiB
C
/*
|
|
* pnglite.h - Interface for pnglite library
|
|
* Copyright (c) 2007 Daniel Karling
|
|
*
|
|
* 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.
|
|
*
|
|
* Daniel Karling
|
|
* daniel.karling@gmail.com
|
|
*/
|
|
|
|
|
|
#ifndef _PNGLITE_H_
|
|
#define _PNGLITE_H_
|
|
|
|
#include <string.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/*
|
|
* Enumerations for pnglite.
|
|
* Negative numbers are error codes and 0 and up are okay responses.
|
|
*/
|
|
|
|
enum {
|
|
PNG_DONE = 1,
|
|
PNG_NO_ERROR = 0,
|
|
PNG_FILE_ERROR = -1,
|
|
PNG_HEADER_ERROR = -2,
|
|
PNG_IO_ERROR = -3,
|
|
PNG_EOF_ERROR = -4,
|
|
PNG_CRC_ERROR = -5,
|
|
PNG_MEMORY_ERROR = -6,
|
|
PNG_ZLIB_ERROR = -7,
|
|
PNG_UNKNOWN_FILTER = -8,
|
|
PNG_NOT_SUPPORTED = -9,
|
|
PNG_WRONG_ARGUMENTS = -10
|
|
};
|
|
|
|
/*
|
|
* The five different kinds of color storage in PNG files.
|
|
*/
|
|
|
|
enum {
|
|
PNG_GREYSCALE = 0,
|
|
PNG_TRUECOLOR = 2,
|
|
PNG_INDEXED = 3,
|
|
PNG_GREYSCALE_ALPHA = 4,
|
|
PNG_TRUECOLOR_ALPHA = 6
|
|
};
|
|
|
|
typedef struct {
|
|
void *zs; /* pointer to z_stream */
|
|
int fd;
|
|
unsigned char *image;
|
|
|
|
unsigned char *png_data;
|
|
unsigned png_datalen;
|
|
|
|
unsigned width;
|
|
unsigned height;
|
|
unsigned char depth;
|
|
unsigned char color_type;
|
|
unsigned char compression_method;
|
|
unsigned char filter_method;
|
|
unsigned char interlace_method;
|
|
unsigned char bpp;
|
|
|
|
unsigned char *readbuf;
|
|
unsigned readbuflen;
|
|
} png_t;
|
|
|
|
|
|
/*
|
|
* Function: png_open
|
|
*
|
|
* This function is used to open a png file with the internal file
|
|
* IO system.
|
|
*
|
|
* Parameters:
|
|
* png - Empty png_t struct.
|
|
* filename - Filename of the file to be opened.
|
|
*
|
|
* Returns:
|
|
* PNG_NO_ERROR on success, otherwise an error code.
|
|
*/
|
|
|
|
int png_open(png_t *png, const char *filename);
|
|
|
|
/*
|
|
* Function: png_print_info
|
|
*
|
|
* This function prints some info about the opened png file to stdout.
|
|
*
|
|
* Parameters:
|
|
* png - png struct to get info from.
|
|
*/
|
|
|
|
void png_print_info(png_t *png);
|
|
|
|
/*
|
|
* Function: png_error_string
|
|
*
|
|
* This function translates an error code to a human readable string.
|
|
*
|
|
* Parameters:
|
|
* error - Error code.
|
|
*
|
|
* Returns:
|
|
* Pointer to string.
|
|
*/
|
|
|
|
char *png_error_string(int error);
|
|
|
|
/*
|
|
* Function: png_get_data
|
|
*
|
|
* This function decodes the opened png file and stores the result in data.
|
|
* data should be big enough to hold the decoded png.
|
|
* Required size will be:
|
|
*
|
|
* > width*height*(bytes per pixel)
|
|
*
|
|
* Parameters:
|
|
* data - Where to store result.
|
|
*
|
|
* Returns:
|
|
* PNG_NO_ERROR on success, otherwise an error code.
|
|
*/
|
|
|
|
int png_get_data(png_t *png, uint8_t *data);
|
|
|
|
/*
|
|
* Function: png_close
|
|
*
|
|
* Closes an open png file pointer.
|
|
*
|
|
* Parameters:
|
|
* png - png to close.
|
|
*
|
|
* Returns:
|
|
* PNG_NO_ERROR
|
|
*/
|
|
|
|
int png_close(png_t *png);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _PNGLITE_H_ */
|