my_lib.h

Spartan3_virtualplatform_8_1

#ifndef MY_JPEG_H
#define MY_JPEG_H

// TODO - copied from include/allegro/palette.h

#ifdef NATIVE_COMPILE
#include <stdio.h>
#endif //NATIVE_COMPILE

typedef struct RGB
{
   unsigned char r, g, b;
   unsigned char filler;
} RGB;

#define PAL_SIZE     256

typedef RGB PALETTE[PAL_SIZE];

// BITMAP from gfx.h

typedef struct BITMAP            /* a bitmap structure */
{
  // CHANGED 
  int ppm_filesize;

   int w, h;                     /* width and height in pixels */
   int clip;                     /* flag if clipping is turned on */
   int cl, cr, ct, cb;           /* clip left, right, top and bottom values */
  //   GFX_VTABLE *vtable;           /* drawing functions */
   void *write_bank;             /* C func on some machines, asm on i386 */
   void *read_bank;              /* C func on some machines, asm on i386 */
  // change void* to int* to write words
  unsigned char *dat;                    /* the memory we allocated for the bitmap */
  unsigned long id;             /* for identifying sub-bitmaps */
   void *extra;                  /* points to a structure with more info */
   int x_ofs;                    /* horizontal offset (for sub-bitmaps) */
   int y_ofs;                    /* vertical offset (for sub-bitmaps) */
   int seg;                      /* bitmap segment */
  //   unsigned char *line[ZERO_SIZE];
} BITMAP;

#define FALSE 0
#define TRUE 1 

#ifndef NULL
#define NULL 0
#endif

// TODO - copied from include/allegro/base.h 
#define MIN(x,y)     (((x) < (y)) ? (x) : (y))
#define MID(x,y,z)   MAX((x), MIN((y), (z)))
#define MAX(x,y)     (((x) > (y)) ? (x) : (y))


#define BYTES_PER_PIXEL(bpp)  (((bpp) <= 8) ? 1                                    \
				     : (((bpp) <= 16) ? sizeof (unsigned short)          \
					: (((bpp) <= 24) ? 3 : sizeof (unsigned long))))


BITMAP *create_bitmap_ex(int color_depth, int width, int height);

void putpixel(BITMAP *bmp, int xx, int yy, int data);

#undef size_t
#undef memset


/* load_memory_jpg:
 *  Decodes a JPG image from a block of memory data.
 */
BITMAP *load_memory_jpg(void *data, RGB *pal);

/* load_jpg:
 *  Decodes a JPG image from a standard JPG file.
 */
BITMAP *load_jpg(char *filename, RGB *pal);


#endif // MY_JPEG_H