bmp.h

 /*************************************************************************/
#ifndef __BMP_H_
#define __BMP_H_

/* C Standard header files */
#include <stdlib.h>
#include <stdint.h>

/* EM types */
#include "em_types.h"

#include "bmp_conf.h"

/***************************************************************************/
#define ECODE_BMP_BASE    0x00000000

/* Error codes */
#define BMP_OK    0x00000000

#define BMP_END_OF_FILE

#define BMP_ERROR_IO                        (ECODE_BMP_BASE | 0x0001)

#define BMP_ERROR_HEADER_SIZE_MISMATCH      (ECODE_BMP_BASE | 0x0002)

#define BMP_ERROR_ENDIAN_MISMATCH           (ECODE_BMP_BASE | 0x0003)

#define BMP_ERROR_FILE_NOT_SUPPORTED        (ECODE_BMP_BASE | 0x0004)

#define BMP_ERROR_FILE_INVALID              (ECODE_BMP_BASE | 0x0005)

#define BMP_ERROR_INVALID_ARGUMENT          (ECODE_BMP_BASE | 0x0006)

#define BMP_ERROR_MODULE_NOT_INITIALIZED    (ECODE_BMP_BASE | 0x0007)

#define BMP_ERROR_INVALID_PALETTE_SIZE      (ECODE_BMP_BASE | 0x0008)

#define BMP_ERROR_FILE_NOT_RESET            (ECODE_BMP_BASE | 0x0009)

#define BMP_ERROR_END_OF_FILE               (ECODE_BMP_BASE | 0x0010)

#define BMP_ERROR_BUFFER_TOO_SMALL          (ECODE_BMP_BASE | 0x0020)

#define BMP_ERROR_PALETTE_NOT_READ          (ECODE_BMP_BASE | 0x0030)

#define BMP_PALETTE_8BIT_SIZE               (256 * 4)

#define BMP_HEADER_SIZE                     (54)

#define BMP_LOCAL_CACHE_LIMIT               (3)

#define RLE8_COMPRESSION                    (1)

#define NO_COMPRESSION                      (0)

#define BMP_LOCAL_CACHE_SIZE                (BMP_CONFIG_LOCAL_CACHE_SIZE)

#if defined ( __GNUC__ )
struct __BMP_Header
#else
__packed struct __BMP_Header
#endif
{
  uint16_t magic;
  uint32_t fileSize;
  uint16_t reserved1;
  uint16_t reserved2;
  uint32_t dataOffset;
  uint32_t headerSize;
  uint32_t width;
  uint32_t height;
  uint16_t colorPlanes;
  uint16_t bitsPerPixel;
  uint32_t compressionType;
  uint32_t imageDataSize;
  uint32_t hPixelsPerMeter;
  uint32_t vPixelsPerMeter;
  uint32_t colorsUsed;
  uint32_t colorsRequired;
#if defined ( __GNUC__ )
} __attribute__ ((__packed__));
#else
};
#endif

typedef struct __BMP_Header   BMP_Header;

typedef struct __BMP_Palette
{
  uint8_t  *data;
  uint32_t size;
} BMP_Palette;

typedef struct __BMP_DataType
{
  uint16_t bitsPerPixel;
  uint32_t compressionType;
  uint32_t size;
  uint32_t endOfRow;
} BMP_DataType;


/* Module prototypes */
EMSTATUS BMP_init(uint8_t *palette, uint32_t paletteSize, EMSTATUS (*fp)(uint8_t buffer[], uint32_t bufLength, uint32_t bytesToRead));
EMSTATUS BMP_reset(void);
EMSTATUS BMP_readRgbData(uint8_t buffer[], uint32_t bufLength, uint32_t *pixelsRead);
EMSTATUS BMP_readRawData(BMP_DataType *dataType, uint8_t buffer[], uint32_t bufLength);

/* Accessor functions */
int32_t BMP_getWidth(void);
int32_t BMP_getHeight(void);
int16_t BMP_getBitsPerPixel(void);
int32_t BMP_getCompressionType(void);
int32_t BMP_getImageDataSize(void);
int32_t BMP_getDataOffset(void);
int32_t BMP_getFileSize(void);

#endif /* __BMP_H_ */