readbmp.h

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//
// $Id: readbmp.h,v 1.2 2000/08/29 08:05:33 weiym Exp $
//
// readbmp.h: Low Level bitmap file read/save routines.
//
// Copyright (C) 2000, WEI Yongming.
//
// Author: WEI Yongming.
//

#ifndef GUI_GDI_READBMP_H
    #define GUI_GDI_READBMP_H

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

int load_bmp (FILE* fp, MYBITMAP *bmp, RGB *pal);
int save_bmp (FILE* fp, MYBITMAP* bmp, RGB* pal);

#ifdef _LBM_FILE_SUPPORT
int load_lbm (FILE* fp, MYBITMAP* bmp, RGB* pal);
int save_lbm (FILE* fp, MYBITMAP* bmp, RGB* pal);
#endif

#ifdef _PCX_FILE_SUPPORT
int load_pcx (FILE* fp, MYBITMAP* bmp, RGB* pal);
int save_pcx (FILE* fp, MYBITMAP* bmp, RGB* pal);
#endif

#ifdef _TGA_FILE_SUPPORT
int load_tga (FILE* fp, MYBITMAP* bmp, RGB* pal);
int save_tga (FILE* fp, MYBITMAP* bmp, RGB* pal);
#endif

#ifdef _GIF_FILE_SUPPORT
int load_gif (FILE* fp, MYBITMAP* bmp, RGB* pal);
int save_gif (FILE* fp, MYBITMAP* bmp, RGB* pal);
#endif

#ifdef _JPG_FILE_SUPPORT
int load_jpg (FILE* fp, MYBITMAP* bmp, RGB* pal);
int save_jpg (FILE* fp, MYBITMAP* bmp, RGB* pal);
#endif

#ifdef _PNG_FILE_SUPPORT
int load_png (FILE* fp, MYBITMAP* bmp, RGB* pal);
int save_png (FILE* fp, MYBITMAP* bmp, RGB* pal);
#endif

int bmpComputePitch (int bpp, int width, int *pitch, BOOL does_round);
void bmpSetBitsInLine (int bpp, BYTE* bits, int pos, BYTE* value);

#define fp_getc(f)      getc (f)

/* fp_igetw:
 *  Reads a 16 bit word from a file, using intel byte ordering.
 */
inline static int fp_igetw (FILE* f)
{
   int b1, b2;

   if ((b1 = fp_getc(f)) != EOF)
      if ((b2 = fp_getc(f)) != EOF)
	 return ((b2 << 8) | b1);

   return EOF;
}

/* fp_igetl:
 *  Reads a 32 bit long from a file, using intel byte ordering.
 */
inline static long fp_igetl (FILE* f)
{
   int b1, b2, b3, b4;

   if ((b1 = fp_getc(f)) != EOF)
      if ((b2 = fp_getc(f)) != EOF)
	 if ((b3 = fp_getc(f)) != EOF)
	    if ((b4 = fp_getc(f)) != EOF)
	       return (((long)b4 << 24) | ((long)b3 << 16) |
		       ((long)b2 << 8) | (long)b1);

   return EOF;
}

/* fp_mgetw:
 *  Reads a 16 bit int from a file, using motorola byte-ordering.
 */
inline static int fp_mgetw(FILE *f)
{
   int b1, b2;

   if ((b1 = fp_getc(f)) != EOF)
      if ((b2 = fp_getc(f)) != EOF)
     return ((b1 << 8) | b2);

   return EOF;
}

/* fp_mgetl:
 *  Reads a 32 bit long from a file, using motorola byte-ordering.
 */
inline static long fp_mgetl(FILE *f)
{
   int b1, b2, b3, b4;

   if ((b1 = fp_getc(f)) != EOF)
      if ((b2 = fp_getc(f)) != EOF)
     if ((b3 = fp_getc(f)) != EOF)
        if ((b4 = fp_getc(f)) != EOF)
           return (((long)b1 << 24) | ((long)b2 << 16) |
               ((long)b3 << 8) | (long)b4);

   return EOF;
}

#ifdef __cplusplus
}
#endif  /* __cplusplus */

#endif // GUI_GDI_READBMP_H