#ifndef _BMP_H
#define _BMP_H

#define xBI_NONE  0
#define xBI_RGB   0
#define xBI_RLE4  2
#define xBI_RLE8  1

#define BMP_SIGNATURE_WORD  0x4d42

#pragma pack( push, 1 )



typedef struct {
    unsigned short    bfType;       // signature - 'BM'
    unsigned long     bfSize;       // file size in bytes
    unsigned short    bfReserved1;  // 0
    unsigned short    bfReserved2;  // 0
    unsigned long     bfOffBits;    // offset to bitmap
} bmphd_t;



typedef struct {
    unsigned long     biSize;       // size of this struct
    long              biWidth;      // bmap width in pixels
    long              biHeight;     // bmap height in pixels
    unsigned short    biPlanes;     // num planes - always 1
    unsigned short    biBitCount;   // bits perpixel
    unsigned long     biCompression; // compression flag
    unsigned long     biSizeImage;   // image size in bytes
    long              biXPelsPerMeter; // horz resolution
    long              biYPelsPerMeter; // vert resolution
    unsigned long     biClrUsed;       // 0 -> color table size
    unsigned long     biClrImportant;  // important color count
} binfo_t;


typedef struct {
    unsigned char blue;
    unsigned char green;
    unsigned char red;
    unsigned char reserved;
} drgb_t;


// quake expects its palette to be bgr
// this is totally backwards but what can you do
typedef struct {
    unsigned char r;
    unsigned char g;
    unsigned char b;
} rgb_t;


typedef struct {
    unsigned char b;
    unsigned char g;
    unsigned char r;
} bgr_t;


typedef struct {
	int            bpp;        // bits per pixel
    int            width;
    int            height;
    unsigned char *data;
    rgb_t         *palette;
} bitmap_t;


//Load bitmap will load the named bitmap off disk.  If info is not NULL,
//it will be filled in as well.
void LoadBMP(char *filename, bitmap_t *bit);
void LoadBMPWithInfo(char *filename, bitmap_t *bit, binfo_t *info);

void FreeBMP(bitmap_t *bitmap);
void WriteBMP(char *filename, bitmap_t *bit);
void NewBMP(int width, int height, int bpp, bitmap_t *bit);

#pragma pack( pop )

#endif
