/*====================================================================*
 -  Copyright (C) 2001 Leptonica.  All rights reserved.
 -
 -  Redistribution and use in source and binary forms, with or without
 -  modification, are permitted provided that the following conditions
 -  are met:
 -  1. Redistributions of source code must retain the above copyright
 -     notice, this list of conditions and the following disclaimer.
 -  2. Redistributions in binary form must reproduce the above
 -     copyright notice, this list of conditions and the following
 -     disclaimer in the documentation and/or other materials
 -     provided with the distribution.
 -
 -  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 -  ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 -  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 -  A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL ANY
 -  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 -  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 -  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 -  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 -  OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 -  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 -  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *====================================================================*/

#ifndef  LEPTONICA_BMP_H
#define  LEPTONICA_BMP_H

/*!
 * \file bmp.h
 *
 * <pre>
 * This file is here to describe the fields in the header of
 * the BMP file.  These fields are not used directly in Leptonica.
 * The only thing we use are the sizes of these two headers.
 * Furthermore, because of potential namespace conflicts with
 * the typedefs and defined sizes, we have changed the names
 * to protect anyone who may also need to use the original definitions.
 * Thanks to J. D. Bryan for pointing out the potential problems when
 * developing on Win32 compatible systems.
 * </pre>
 */

/*-------------------------------------------------------------*
 *                       BMP file header                       *
 *-------------------------------------------------------------*/

/*! BMP file header */
struct BMP_FileHeader
{
    l_int16        bfType;         /*!< file type; must be "BM"            */
    l_int16        bfSize;         /*!< length of the file;
                                       sizeof(BMP_FileHeader) +
                                       sizeof(BMP_InfoHeader) +
                                       size of color table +
                                       size of DIB bits                    */
    l_int16        bfFill1;        /*!< remainder of the bfSize field      */
    l_int16        bfReserved1;    /*!< don't care (set to 0)              */
    l_int16        bfReserved2;    /*!< don't care (set to 0)              */
    l_int16        bfOffBits;      /*!< offset from beginning of file      */
    l_int16        bfFill2;        /*!< remainder of the bfOffBits field   */
};
typedef struct BMP_FileHeader  BMP_FH;

/*! Number of bytes in a BMP file header */
#define BMP_FHBYTES  sizeof(BMP_FH)


/*-------------------------------------------------------------*
 *                       BMP info header                       *
 *-------------------------------------------------------------*/

/*! BMP info header */
struct BMP_InfoHeader
{
    l_int32        biSize;          /*!< size of the BMP_InfoHeader struct   */
    l_int32        biWidth;         /*!< bitmap width in pixels              */
    l_int32        biHeight;        /*!< bitmap height in pixels             */
    l_int16        biPlanes;        /*!< number of bitmap planes             */
    l_int16        biBitCount;      /*!< number of bits per pixel            */
    l_int32        biCompression;   /*!< compress format (0 == uncompressed) */
    l_int32        biSizeImage;     /*!< size of image in bytes              */
    l_int32        biXPelsPerMeter; /*!< pixels per meter in x direction     */
    l_int32        biYPelsPerMeter; /*!< pixels per meter in y direction     */
    l_int32        biClrUsed;       /*!< number of colors used               */
    l_int32        biClrImportant;  /*!< number of important colors used     */
};
typedef struct BMP_InfoHeader  BMP_IH;

/*! Number of bytes in a BMP info header */
#define BMP_IHBYTES  sizeof(BMP_IH)


#endif  /* LEPTONICA_BMP_H */
