mr_pnm_io.h

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/* The Partitions Musics Recognition System project.
 * (c)2003 by Fabien Pelisson (fabien dot pelisson at wanadoo dot fr)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef MR_PNM_IO_H
#define MR_PNM_IO_H

#ifdef __cplusplus
extern              "C"
{
#endif                          /* __cplusplus */

#define MR_PBM_ASCII                  1
#define MR_PGM_ASCII                  2
#define MR_PPM_ASCII                  3
#define MR_PBM_RAW                    4
#define MR_PGM_RAW                    5
#define MR_PPM_RAW                    6

/* 
 * Errors types 
 */

#define MR_PNM_ELIBC                  0 

#define MR_PNM_EMAGIC                 1 

#define MR_PNM_EITEMS                 2 

#define MR_PNM_EDATA                  3 

#define MR_PNM_ESIZE                  4 

#define MR_PNM_EMAXVAL                5 

extern int mr_pnm_errno;

typedef struct MrPNMImage MrPNMImage;

struct MrPNMImage
{
  short int pnm_type;           
  short int nc;                 
  short int depth;              
  unsigned int byte_width;      
  unsigned short int maxval;    
  unsigned int width;           
  unsigned int height;          
  unsigned char* data;          
};

MrPNMImage* mr_pnm_new();

void mr_pnm_free(MrPNMImage* img);

MrPNMImage* mr_pnm_new_from_file(const char* filename);

int mr_pnm_write_to_file(MrPNMImage* image, const char* filename);

void mr_pnm_draw_rectangle(MrPNMImage* image,
                           unsigned int x, unsigned int y,
                           unsigned int w, unsigned int h,
                           unsigned char r, unsigned char g, unsigned char b,
                           short int fill);

void mr_pnm_draw_horizontal_line(MrPNMImage* image,
                                 unsigned int x, unsigned int y, unsigned int len,
                                 unsigned char r, unsigned char g, unsigned char b);
  
#ifdef __cplusplus
}
#endif                          /* __cplusplus */

#endif /* MR_PNM_IO_H */

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