bmp.h

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#ifndef BMP_H
#define BMP_H

#define BMP_TYPE       0x4D42

#define BITMAPINFOHEADER   40
 
/*------------------------------------------------------------------------------
 *         Exported types
 *------------------------------------------------------------------------------*/
 
#pragma pack(1)

typedef struct _BMPHeader {
    /*  signature, must be 4D42 hex */
    uint16_t type;
    /*  size of BMP file in bytes (unreliable) */
    uint32_t fileSize;
    /*  reserved, must be zero */
    uint16_t reserved1;
    /*  reserved, must be zero */
    uint16_t reserved2;
    /*  offset to start of image data in bytes */
    uint32_t offset;
    /*  size of BITMAPINFOHEADER structure, must be 40 */
    uint32_t headerSize;
    /*  image width in pixels */
    uint32_t width;
    /*  image height in pixels */
    uint32_t height;
    /*  number of planes in the image, must be 1 */
    uint16_t planes;
    /*  number of bits per pixel (1, 4, 8, 16, 24, 32) */
    uint16_t bits;
    /*  compression type (0=none, 1=RLE-8, 2=RLE-4) */
    uint32_t compression;
    /*  size of image data in bytes (including padding) */
    uint32_t imageSize;
    /*  horizontal resolution in pixels per meter (unreliable) */
    uint32_t xresolution;
    /*  vertical resolution in pixels per meter (unreliable) */
    uint32_t yresolution;
    /*  number of colors in image, or zero */
    uint32_t ncolours;
    /*  number of important colors, or zero */
    uint32_t importantcolours;
} BMPHeader;
 
#pragma pack()
 
/*------------------------------------------------------------------------------
 *         Exported functions
 *------------------------------------------------------------------------------*/
extern uint8_t BMP_IsValid(void *file);
extern uint32_t BMP_GetFileSize(void *file);
 
extern uint8_t BMP_Decode(
    void *file,
    uint8_t *buffer,
    uint32_t width,
    uint32_t height,
    uint8_t bpp);
 
extern void WriteBMPheader(
    uint32_t *pAddressHeader,
    uint32_t  bmpHSize,
    uint32_t  bmpVSize,
    uint8_t nbByte_Pixels);
 
extern void BMP_displayHeader(uint32_t *pAddressHeader);
extern void RGB565toBGR555(
    uint8_t *fileSource,
    uint8_t *fileDestination,
    uint32_t width,
    uint32_t height,
    uint8_t bpp);
 
#endif //#ifndef BMP_H