#ifdef _MSC_VER

#pragma warning(disable : 4996)

#endif

#ifndef _DEBUG

#undef _STLP_DEBUG

#else

#define _STLP_DEBUG 1

#endif

#include <stdio.h></stdio.h>

#include <string.h></string.h>

#include <stdlib.h></stdlib.h>

#include <math.h></math.h>

/* brutto! Forse dovremmo metterlo in include */

#include "../image/compatibility/tnz4.h"

#include "../image/compatibility/inforegion.h"

#include "filebmp.h"

#define UNUSED_REDUCE_COLORS

/*---------------------------------------------------------------------------*/

/*-- Defines ----------------------------------------------------------------*/

#define BMP_BI_RGB 0

#define BMP_BI_RLE8 1

#define BMP_BI_RLE4 2

#define BMP_WIN_NEW 40

#define BMP_OS2_NEW 64

#define BMP_READ_INFO 1

#define BMP_READ_IMAGE 2

#define BMP_FERROR(fp) (ferror(fp) || feof(fp))

#define BMP_RMAP(x) (x & 0xe0) | ((x & 0xe0) >> 3) | ((x & 0xc0) >> 6)

#define BMP_GMAP(x) ((x & 0x1c) << 3) | (x & 0x1c) | ((x & 0x18) >> 3)

#define BMP_BMAP(x)                                                            \

  ((x & 0x03) << 6) | ((x & 0x03) << 4) | ((x & 0x03) << 2) | (x & 0x03)

#define BMP_RMAP16(x)                                                          \

  ((x & 0xc0) << 0) | ((x & 0xc0) >> 2) | ((x & 0xc0) >> 4) | ((x & 0xc0) >> 6)

#define BMP_GMAP16(x)                                                          \

  ((x & 0x60) << 1) | ((x & 0x60) >> 1) | ((x & 0x60) >> 3) | ((x & 0x60) >> 5)

#define BMP_BMAP16(x)                                                          \

  ((x & 0x30) << 2) | ((x & 0x30) << 0) | ((x & 0x30) >> 2) | ((x & 0x30) >> 4)

#define BMP_CUT(a, b, c)                                                       \

  {                                                                            \

    if (a < b)                                                                 \

      a = b;                                                                   \

    else if (a > c)                                                            \

      a = c;                                                                   \

  }

#define BMP_REDUCE_COLORS(r, g, b)                                             \

  ((r & 0xe0) | ((g & 0xe0) >> 3) | ((b & 0xc0) >> 6))

#define BMP_ADD_ERROR(pix, weight)                                             \

  {                                                                            \

    tmp = (pix).r + ((r1 * weight) >> 4);                                      \

    BMP_CUT(tmp, 0, 255);                                                      \

    (pix).r = tmp;                                                             \

    tmp     = (pix).g + ((g1 * weight) >> 4);                                  \

    BMP_CUT(tmp, 0, 255);                                                      \

    (pix).g = tmp;                                                             \

    tmp     = (pix).b + ((b1 * weight) >> 4);                                  \

    BMP_CUT(tmp, 0, 255);                                                      \

    (pix).b = tmp;                                                             \

  }

#define BMP_ADD_ERROR_BW(pix, error)                                           \

  {                                                                            \

    tmp = (pix).r + (error);                                                   \

    BMP_CUT(tmp, 0, 255);                                                      \

    (pix).r = tmp;                                                             \

    tmp     = (pix).g + (error);                                               \

    BMP_CUT(tmp, 0, 255);                                                      \

    (pix).g = tmp;                                                             \

    tmp     = (pix).b + (error);                                               \

    BMP_CUT(tmp, 0, 255);                                                      \

    (pix).b = tmp;                                                             \

  }

/*---------------------------------------------------------------------------*/

/*-- Structures and Enums ---------------------------------------------------*/

/*---------------------------------------------------------------------------*/

/*-- Prototypes -------------------------------------------------------------*/

static BMP_SUBTYPE bmp_get_colorstyle(IMAGE *img);

/*---------------------------------------------------------------------------*/

/*-- Local Prototypes -------------------------------------------------------*/

static UINT getshort(FILE *fp);

static UINT getint(FILE *fp);

static void putshort(FILE *fp, int value);

static void putint(FILE *fp, int value);

/*static int img_read_bmp_generic(const MYSTRING fname, int type, IMAGE **);*/

#ifndef UNUSED_REDUCE_COLORS

static UCHAR *reduce_colors(UCHAR *buffin, int xsize, int ysize, UCHAR *rmap,

                            UCHAR *gmap, UCHAR *bmap, int nc);

#endif

#ifndef __LIBSIMAGE__

#ifdef CICCIO

static int loadBMP1(FILE *fp, LPIXEL *pic, UINT w, UINT h, UCHAR *r, UCHAR *g,

                    UCHAR *b);

static int loadBMP4(FILE *fp, LPIXEL *pic, UINT w, UINT h, UINT comp, UCHAR *r,

                    UCHAR *g, UCHAR *b);

static int loadBMP8(FILE *fp, LPIXEL *pic, UINT w, UINT h, UINT comp, UCHAR *r,

                    UCHAR *g, UCHAR *b);

static int loadBMP24(FILE *fp, LPIXEL *pic, UINT w, UINT h);

#endif

#endif /* __LIBSIMAGE__ */

static int writeBMP1(FILE *fp, UCHAR *pic8, UINT w, UINT h, UCHAR *map);

static int writeBMP4(FILE *fp, UCHAR *pic8, UINT w, UINT h, UCHAR *map);

static int writeBMPC4(FILE *fp, UCHAR *pic8, UINT w, UINT h, UCHAR *map);

static int writeBMP8(FILE *fp, UCHAR *pic8, UINT w, UINT h, UCHAR *map);

static int writeBMPC8(FILE *fp, UCHAR *pic8, UINT w, UINT h, UCHAR *map);

static int writeBMP24(FILE *fp, UCHAR *pic24, UINT w, UINT h, UCHAR *map);

static int load_lineBMP1(FILE *fp, LPIXEL *pic, UINT w, UINT padw, UCHAR **map);

static int load_lineBMP4(FILE *fp, LPIXEL *pic, UINT w, UINT padw, UCHAR **map);

static int load_lineBMPC4(FILE *fp, LPIXEL *pic, UINT w, UINT y, UCHAR **map);

static int load_lineBMP8(FILE *fp, LPIXEL *pic, UINT w, UINT padw, UCHAR **map);

static int load_lineBMPC8(FILE *fp, LPIXEL *pic, UINT w, UINT y, UCHAR **map);

static int load_lineBMP24(FILE *fp, LPIXEL *pic, UINT w, UINT padb);

static int line_writeBMP1(FILE *fp, UCHAR *pic8, UINT w, UINT padw,

                          UCHAR *pc2nc);

static int line_writeBMP4(FILE *fp, UCHAR *pic8, UINT w, UINT padw,

                          UCHAR *pc2nc);

static int line_writeBMPC4(FILE *fp, UCHAR *pic8, UINT w, UINT row,

                           UCHAR *pc2nc);

static int line_writeBMP8(FILE *fp, UCHAR *pic8, UINT w, UINT padw,

                          UCHAR *pc2nc);

static int line_writeBMPC8(FILE *fp, UCHAR *pic8, UINT w, UINT row,

                           UCHAR *pc2nc);

static int line_writeBMP24(FILE *fp, LPIXEL *pp, UINT w, UINT padb);

static int skip_rowsBMP1(FILE *fp, UINT w, UINT pad, UINT rows, int whence);

static int skip_rowsBMP4(FILE *fp, UINT w, UINT pad, UINT rows, int whence);

static int skip_rowsBMPC4(FILE *fp, UINT rows);

static int skip_rowsBMP8(FILE *fp, UINT w, UINT pad, UINT rows, int whence);

static int skip_rowsBMPC8(FILE *fp, UINT rows);

static int skip_rowsBMP24(FILE *fp, UINT w, UINT pad, UINT rows, int whence);

#define BMP_DEBUG 0

#define __BMP_WRITE_LINE_BY_LINE

#define __BMP_READ_LINE_BY_LINE

/*---------------------------------------------------------------------------*/

int read_bmp_line(FILE *fp, void *line_buffer, UINT w, UINT row, UCHAR **map,

                  BMP_SUBTYPE type)

/*---------------------------------------------------------------------------*/

{

  LPIXEL *pic = (LPIXEL *)line_buffer;

  unsigned int pad;

  int rv = 0;

  switch (type) {

  case BMP_BW:

    pad = ((w + 31) / 32) * 32;

    rv  = load_lineBMP1(fp, pic, w, (UINT)pad, map);

    break;

  case BMP_GREY16:

  case BMP_CMAPPED16:

    pad = ((w + 7) / 8) * 8;

    rv  = load_lineBMP4(fp, pic, w, (UINT)pad, map);

    break;

  case BMP_GREY16C:

  case BMP_CMAPPED16C:

    rv = load_lineBMPC4(fp, pic, w, row, map);

    if (rv == -1)

      rv = 1;

    else if (rv == -2)

      rv = 0;

    else if (rv == -3)

      rv = 0;

    else

      rv = 0;

    break;

  case BMP_GREY256:

  case BMP_CMAPPED256:

    pad = ((w + 3) / 4) * 4;

    rv  = load_lineBMP8(fp, pic, w, (UINT)pad, map);

    break;

  case BMP_GREY256C:

  case BMP_CMAPPED256C:

    rv = load_lineBMPC8(fp, pic, w, row, map);

    if (rv == -1)

      rv = 1;

    else if (rv == -2)

      rv = 0;

    else if (rv == -3)

      rv = 0;

    else

      rv = 0;

    break;

  case BMP_RGB:

    pad = (4 - ((w * 3) % 4)) & 0x03;

    rv  = load_lineBMP24(fp, pic, w, (UINT)pad);

    break;

  default:

    break;

  }

  return !rv; /* return 0 for unsuccess */

}

/*---------------------------------------------------------------------------*/

int write_bmp_line(FILE *fp, void *line_buffer, UINT w, UINT row, UCHAR *map,

                   BMP_SUBTYPE type)

/*---------------------------------------------------------------------------*/

{

  UCHAR *pic  = (UCHAR *)line_buffer;

  LPIXEL *p24 = (LPIXEL *)line_buffer;

  unsigned int pad;

  int rv = 0;

  switch (type) {

  case BMP_BW:

    pad = ((w + 31) / 32) * 32;

    rv  = line_writeBMP1(fp, pic, w, (UINT)pad, map);

    break;

  case BMP_GREY16:

  case BMP_CMAPPED16:

    pad = ((w + 7) / 8) * 8;

    rv  = line_writeBMP4(fp, pic, w, (UINT)pad, map);

    break;

  case BMP_GREY16C:

  case BMP_CMAPPED16C:

    rv = line_writeBMPC4(fp, pic, w, row, map);

    break;

  case BMP_GREY256:

  case BMP_CMAPPED256:

    pad = ((w + 3) / 4) * 4;

    rv  = line_writeBMP8(fp, pic, w, (UINT)pad, map);

    break;

  case BMP_GREY256C:

  case BMP_CMAPPED256C:

    rv = line_writeBMPC8(fp, pic, w, row, map);

    break;

  case BMP_RGB:

    pad = (4 - ((w * 3) % 4)) & 0x03;

    rv  = line_writeBMP24(fp, p24, w, (UINT)pad);

    break;

  default:

    break;

  }

  return rv; /* 0 for unsuccess */

}

/*---------------------------------------------------------------------------*/

int skip_bmp_lines(FILE *fp, UINT w, UINT rows, int whence, BMP_SUBTYPE type)

/*---------------------------------------------------------------------------*/

{

  unsigned int pad;

  int rv = 0;

  switch (type) {

  case BMP_BW:

    pad = ((w + 31) / 32) * 32;

    rv  = skip_rowsBMP1(fp, w, (UINT)pad, rows, whence);

    break;

  case BMP_GREY16:

  case BMP_CMAPPED16:

    pad = ((w + 7) / 8) * 8;

    rv  = skip_rowsBMP4(fp, w, (UINT)pad, rows, whence);

    break;

  case BMP_GREY16C:

  case BMP_CMAPPED16C:

    rv = skip_rowsBMPC4(fp, rows);

    break;

  case BMP_GREY256:

  case BMP_CMAPPED256:

    pad = ((w + 3) / 4) * 4;

    rv  = skip_rowsBMP8(fp, w, (UINT)pad, rows, whence);

    break;

  case BMP_GREY256C:

  case BMP_CMAPPED256C:

    rv = skip_rowsBMPC8(fp, rows);

    break;

  case BMP_RGB:

    pad = (4 - ((w * 3) % 4)) & 0x03;

    rv  = skip_rowsBMP24(fp, w, (UINT)pad, rows, whence);

    break;

  default:

    break;

  }

  return !rv;

}

/*---------------------------------------------------------------------------*/

int error_checking_bmp(BMP_HEADER *hd)

/*---------------------------------------------------------------------------*/

{

  /* error checking */

  if ((hd->biBitCount != 1 && hd->biBitCount != 4 && hd->biBitCount != 8 &&

       hd->biBitCount != 24) ||

      hd->biPlanes != 1 || hd->biCompression > BMP_BI_RLE4) {

    return UNSUPPORTED_BMP_FORMAT;

  }

  /* error checking */

  if (((hd->biBitCount == 1 || hd->biBitCount == 24) &&

       hd->biCompression != BMP_BI_RGB) ||

      (hd->biBitCount == 4 && hd->biCompression == BMP_BI_RLE8) ||

      (hd->biBitCount == 8 && hd->biCompression == BMP_BI_RLE4)) {

    return UNSUPPORTED_BMP_FORMAT;

  }

  return OK;

}

/*---------------------------------------------------------------------------*/

int load_bmp_header(FILE *fp, BMP_HEADER **header)

/*---------------------------------------------------------------------------*/

{

  BMP_HEADER *hd = NULL;

  int c, c1;

  *header = NULL;

  hd = (BMP_HEADER *)calloc((size_t)1, sizeof(BMP_HEADER));

  if (!hd) return OUT_OF_MEMORY;

  /* figure out the file size */

  fseek(fp, 0L, SEEK_END);

  hd->biFilesize = ftell(fp);

  fseek(fp, 0L, 0);

  /* read the file type (first two bytes) */

  c  = getc(fp);

  c1 = getc(fp);

  if (c != 'B' || c1 != 'M') {

    free(hd);

    return UNSUPPORTED_BMP_FORMAT;

  }

  hd->bfSize = getint(fp);

  /* reserved and ignored */

  getshort(fp);

  getshort(fp);

  hd->bfOffBits = getint(fp);

  hd->biSize    = getint(fp);

  if (hd->biSize == BMP_WIN_NEW || hd->biSize == BMP_OS2_NEW) {

    hd->biWidth         = getint(fp);

    hd->biHeight        = getint(fp);

    hd->biPlanes        = getshort(fp);

    hd->biBitCount      = getshort(fp);

    hd->biCompression   = getint(fp);

    hd->biSizeImage     = getint(fp);

    hd->biXPelsPerMeter = getint(fp);

    hd->biYPelsPerMeter = getint(fp);

    hd->biClrUsed       = getint(fp);

    hd->biClrImportant  = getint(fp);

  } else /* old bitmap format */

  {

    hd->biWidth    = getshort(fp);

    hd->biHeight   = getshort(fp);

    hd->biPlanes   = getshort(fp);

    hd->biBitCount = getshort(fp);

    /* Not in old versions so have to compute them */

    hd->biSizeImage =

        (((hd->biPlanes * hd->biBitCount * hd->biWidth) + 31) / 32) * 4 *

        hd->biHeight;

    hd->biCompression   = BMP_BI_RGB;

    hd->biXPelsPerMeter = 0;

    hd->biYPelsPerMeter = 0;

    hd->biClrUsed       = 0;

    hd->biClrImportant  = 0;

  }

  if (BMP_DEBUG) {

    printf("\nLoadBMP:\tbfSize=%u, bfOffBits=%u\n", hd->bfSize, hd->bfOffBits);

    printf("\t\tbiSize=%u, biWidth=%u, biHeight=%u, biPlanes=%u\n", hd->biSize,

           hd->biWidth, hd->biHeight, hd->biPlanes);

    printf("\t\tbiBitCount=%u, biCompression=%u, biSizeImage=%u\n",

           hd->biBitCount, hd->biCompression, hd->biSizeImage);

    printf("\t\tbiX,YPelsPerMeter=%u,%u  biClrUsed=%u, biClrImp=%u\n",

           hd->biXPelsPerMeter, hd->biYPelsPerMeter, hd->biClrUsed,

           hd->biClrImportant);

  }

  if (BMP_FERROR(fp)) {

    free(hd);

    return UNEXPECTED_EOF;

  }

  *header = hd;

  return OK;

}

/*---------------------------------------------------------------------------*/

void release_bmp_header(BMP_HEADER *hd)

/*---------------------------------------------------------------------------*/

{

  if (hd) free(hd);

}

#ifndef __LIBSIMAGE__

#ifdef CICCIO

/*---------------------------------------------------------------------------*/

int img_read_bmp(const MYSTRING fname, IMAGE **pimg)

/*---------------------------------------------------------------------------*/

{

  return img_read_bmp_generic(fname, BMP_READ_IMAGE, pimg);

}

/*---------------------------------------------------------------------------*/

static int img_read_bmp_generic(const MYSTRING fname, int type, IMAGE **pimg)

/*---------------------------------------------------------------------------*/

{

  int retCode = OK;

  UCHAR r[256], g[256], b[256];

  BMP_HEADER *hd = NULL;

  IMAGE *img     = NULL;

  int rv, c, i;

  LPIXEL *pic;

  FILE *fp;

  *pimg = 0;

  /* returns  'NULL' on unsuccess */

  pic = (LPIXEL *)NULL;

  /* open image file */

  fp = _wfopen(fname, L"rb");

  if (!fp) return CANT_OPEN_FILE;

  /* load up the image header */

  retCode = load_bmp_header(fp, &hd);

  if (retCode != OK) goto ERROR;

  /* error checking */

  if ((hd->biBitCount != 1 && hd->biBitCount != 4 && hd->biBitCount != 8 &&

       hd->biBitCount != 24) ||

      hd->biPlanes != 1 || hd->biCompression > BMP_BI_RLE4) {

    retCode = UNSUPPORTED_BMP_FORMAT;

    goto ERROR;

  }

  /* error checking */

  if (((hd->biBitCount == 1 || hd->biBitCount == 24) &&

       hd->biCompression != BMP_BI_RGB) ||

      (hd->biBitCount == 4 && hd->biCompression == BMP_BI_RLE8) ||

      (hd->biBitCount == 8 && hd->biCompression == BMP_BI_RLE4)) {

    retCode = UNSUPPORTED_BMP_FORMAT;

    goto ERROR;

  }

  img       = new_img();

  img->type = TOONZRGB;

  if (type == BMP_READ_INFO) {

    fclose(fp);

    img->xSBsize = img->xsize = hd->biWidth;

    img->ySBsize = img->ysize = hd->biHeight;

    release_bmp_header(hd);

    *pimg = img;

    return OK;

  }

  allocate_pixmap(img, (int)hd->biWidth, (int)hd->biHeight);

  /* hd->biPad; */

  if (hd->biSize != BMP_WIN_OS2_OLD) {

    /* skip ahead to colormap, using biSize */

    c = hd->biSize - 40; /* 40 bytes read from biSize to biClrImportant */

    for (i    = 0; i < c; i++) getc(fp);

    hd->biPad = hd->bfOffBits - (hd->biSize + 14);

  }

  /* load up colormap, if any */

  if (hd->biBitCount != 24) {

    int i, cmaplen;

    /*cmaplen = (hd->biClrUsed) ? hd->biClrUsed : 1 << hd->biBitCount;*/

    if (hd->biClrUsed)

      cmaplen = hd->biClrUsed;

    else

      cmaplen = 1 << hd->biBitCount;

    for (i = 0; i < cmaplen; i++) {

      b[i] = getc(fp);

      g[i] = getc(fp);

      r[i] = getc(fp);

      if (hd->biSize != BMP_WIN_OS2_OLD) {

        getc(fp);

        hd->biPad -= 4;

      }

    }

    if (BMP_FERROR(fp)) {

      retCode = UNEXPECTED_EOF;

      goto ERROR;

    }

    if (BMP_DEBUG) {

      printf("LoadBMP:  BMP colormap:  (RGB order)\n");

      for (i = 0; i < cmaplen; i++) printf("%02x%02x%02x  ", r[i], g[i], b[i]);

      printf("\n\n");

    }

  }

  if (hd->biSize != BMP_WIN_OS2_OLD) {

    /* Waste any unused bytes between the colour map (if present)

and the start of the actual bitmap data.

*/

    while (hd->biPad > 0) {

      (void)getc(fp);

      hd->biPad--;

    }

  }

  /* create 32 bit image buffer */

  pic = (LPIXEL *)img->buffer;

  /* load up the image */

  switch (hd->biBitCount) {

  case 1:

    rv = loadBMP1(fp, pic, hd->biWidth, hd->biHeight, r, g, b);

    break;

  case 4:

    rv = loadBMP4(fp, pic, hd->biWidth, hd->biHeight, hd->biCompression, r, g,

                  b);

    break;

  case 8:

    rv = loadBMP8(fp, pic, hd->biWidth, hd->biHeight, hd->biCompression, r, g,

                  b);

    break;

  case 24:

    rv = loadBMP24(fp, pic, hd->biWidth, hd->biHeight);

    break;

  default:

    retCode = UNSUPPORTED_BMP_FORMAT;

    goto ERROR;

  }

  if (rv) {

    retCode = UNEXPECTED_EOF;

    goto ERROR;

  }

  fclose(fp);

  release_bmp_header(hd);

  *pimg = img;

  return OK;

ERROR:

  fclose(fp);

  release_bmp_header(hd);

  if (img) {

    TFREE(img->buffer)

    TFREE(img)

  }

  return retCode;

}

#endif

#endif /* __LIBSIMAGE__ */

#ifdef CICCIO

static int img_read_bmp_region(const MYSTRING fname, IMAGE **pimg, int x1,

                               int y1, int x2, int y2, int scale) {

  UCHAR r[256], g[256], b[256] /*  ,*map[3]  */;

  LPIXEL *line   = NULL;

  UINT line_size = 0;

  BMP_HEADER *hd = NULL;

  EXT_INFO_REGION info;

  BMP_SUBTYPE subtype;

  LPIXEL *pic, *appo;

  IMAGE *img = NULL;

  UINT start_offset;

  UINT c, i, j;

  char buf[512];

  FILE *fp;

  UINT pad;

  enum BMP_ERROR_CODE bmp_error = OK;

  /* initialize some variables */

  i = pad = 0;

  /* returns  'NULL' on unsuccess */

  pic = (LPIXEL *)NULL;

  /* open image file */

  fp = _wfopen(fname, L"rb");

  if (!fp) {

    return CANT_OPEN_FILE;

  }

  /* load up the image header */

  load_bmp_header(fp, &hd);

  if (!hd) goto ERROR;

  /* error checking */

  if ((hd->biBitCount != 1 && hd->biBitCount != 4 && hd->biBitCount != 8 &&

       hd->biBitCount != 24) ||

      hd->biPlanes != 1 || hd->biCompression > BMP_BI_RLE4) {

    snprintf(buf, sizeof(buf),

             "Bogus BMP File! (bitCount=%d, Planes=%d, Compression=%d)",

             hd->biBitCount, hd->biPlanes, hd->biCompression);

    bmp_error = UNSUPPORTED_BMP_FORMAT;

    goto ERROR;

  }

  /* error checking */

  if (((hd->biBitCount == 1 || hd->biBitCount == 24) &&

       hd->biCompression != BMP_BI_RGB) ||

      (hd->biBitCount == 4 && hd->biCompression == BMP_BI_RLE8) ||

      (hd->biBitCount == 8 && hd->biCompression == BMP_BI_RLE4)) {

    snprintf(buf, sizeof(buf),

             "Bogus BMP File!  (bitCount=%d, Compression=%d)",

             hd->biBitCount, hd->biCompression);

    bmp_error = UNSUPPORTED_BMP_FORMAT;

    goto ERROR;

  }

  img = new_img();

  img->type = TOONZRGB;

  img->xsize   = hd->biWidth;

  img->ysize   = hd->biHeight;

  img->xSBsize = hd->biWidth;

  img->ySBsize = hd->biHeight;

  img->x_dpi   = (double)(hd->biXPelsPerMeter / 39);

  img->y_dpi   = (double)(hd->biYPelsPerMeter / 39);

  hd->biPad = 0;

  if (hd->biSize != BMP_WIN_OS2_OLD) {

    /* skip ahead to colormap, using biSize */

    c = hd->biSize - 40; /* 40 bytes read from biSize to biClrImportant */

    for (i    = 0; i < c; i++) getc(fp);

    hd->biPad = hd->bfOffBits - (hd->biSize + 14);

  }

  /* load up colormap, if any */

  if (hd->biBitCount != 24) {

    int i, cmaplen;

    /*cmaplen = (hd->biClrUsed) ? hd->biClrUsed : 1 << hd->biBitCount;*/

    if (hd->biClrUsed)

      cmaplen = hd->biClrUsed;

    else

      cmaplen = hd->biBitCount;

    for (i = 0; i < cmaplen; i++) {

      b[i] = getc(fp);

      g[i] = getc(fp);

      r[i] = getc(fp);

      if (hd->biSize != BMP_WIN_OS2_OLD) {

        getc(fp);

        hd->biPad -= 4;

      }

    }

    if (BMP_FERROR(fp)) {

      bmp_error = UNEXPECTED_EOF;

      goto ERROR;

    }

    if (BMP_DEBUG) {

      printf("LoadBMP:  BMP colormap:  (RGB order)\n");

      for (i = 0; i < cmaplen; i++) printf("%02x%02x%02x  ", r[i], g[i], b[i]);

      printf("\n\n");

    }

  }

  if (hd->biSize != BMP_WIN_OS2_OLD) {

    /* Waste any unused bytes between the colour map (if present)

and the start of the actual bitmap data.

*/

    while (hd->biPad > 0) {

      (void)getc(fp);

      hd->biPad--;

    }

  }

  /* get information about the portion of the image to load */

  get_info_region(&info, x1, y1, x2, y2, scale, (int)hd->biWidth,

                  (int)hd->biHeight, TNZ_BOTLEFT);

  /* create 32 bit image buffer */

  if (!allocate_pixmap(img, info.xsize, info.ysize)) {

    bmp_error = OUT_OF_MEMORY;

    goto ERROR;

  }

  start_offset = info.y_offset * info.xsize + info.x_offset;

  pic          = ((LPIXEL *)img->buffer) + start_offset;

  if (line_size < hd->biWidth + 32) {

    line_size = hd->biWidth + 32;

    if (!line)

      TCALLOC((LPIXEL *)line, (size_t)line_size)

    else

      TREALLOC(line, line_size)

  }

  if (!line) {

    bmp_error = OUT_OF_MEMORY;

    goto ERROR;

  }

  switch (hd->biBitCount) {

  case 1:

    pad = ((hd->biWidth + 31) / 32) * 32;

    break;

  case 4:

    pad = ((hd->biWidth + 7) / 8) * 8;

    break;

  case 8:

    pad = ((hd->biWidth + 3) / 4) * 4;

    break;

  case 24:

    pad = (4 - ((hd->biWidth * 3) % 4)) & 0x03;

    break;

  default:

    /* segnala errore ed esci */

    break;

  }

  subtype = bmp_get_colorstyle(img);

  if (subtype == BMP_NONE) goto ERROR;

  if (info.y_offset > 0) info.scanNrow++;

  if (info.x_offset > 0) info.scanNcol++;

  /*  print_info_region(&info);      */

  if (info.startScanRow > 0)

    skip_bmp_lines(fp, hd->biWidth, (unsigned int)(info.startScanRow - 1),

                   (unsigned int)SEEK_CUR, subtype);

  for (i = 0; i < (UINT)info.scanNrow; i++) {

    if (load_lineBMP24(fp, line, hd->biWidth, pad)) goto ERROR;

    for (appo = pic, j = c = 0; j < (UINT)info.scanNcol; j++, c += info.step)

      *appo++ = *(line + info.startScanCol + c);

    pic += info.xsize;

    skip_bmp_lines(fp, hd->biWidth, (unsigned int)(info.step - 1),

                   (unsigned int)SEEK_CUR, subtype);

  }

  /*

if (BMP_FERROR(fp))

{

bmp_error(fname, "File appears truncated.  Winging it.\n");

goto ERROR;

}

*/

  fclose(fp);

  release_bmp_header(hd);

  TFREE(line);

  *pimg = img;

  return OK;

ERROR:

  printf("error: (row=%d)\n", i);

  fclose(fp);

  release_bmp_header(hd);

  if (img) free_img(img);

  TFREE(line);

  return bmp_error;

}

#endif

/*---------------------------------------------------------------------------*/

#ifndef __LIBSIMAGE__

#ifdef CICCIO

static int loadBMP1(FILE *fp, LPIXEL *pic, UINT w, UINT h, UCHAR *r, UCHAR *g,

                    UCHAR *b)

/*---------------------------------------------------------------------------*/

{

  UINT i, j, c, bitnum, padw, rv;

  UCHAR byte;

  LPIXEL *pp;

#ifdef BMP_READ_LINE_BY_LINE

  UCHAR *map[3];

  map[0] = r;

  map[1] = g;

  map[2] = b;

#endif

  rv = c = 0;

  padw   = ((w + 31) / 32) * 32; /* 'w', padded to be a multiple of 32 */

  for (i = 0; i < h; i++) {

#ifdef BMP_READ_LINE_BY_LINE

    pp = pic + (i * w);

    rv = load_lineBMP1(fp, pp, w, padw, map);

    if (rv) break;

#else

    pp = pic + (i * w);

    for (j = bitnum = 0; j < padw; j++, bitnum++) {

      if ((bitnum & 7) == 0) /* read the next byte */

      {

        c      = getc(fp);

        bitnum = 0;

      }

      if (j < w) {

        byte = (c & 0x80) ? 1 : 0;

        c <<= 1;

        pp->r = r[byte];

        pp->g = g[byte];

        pp->b = b[byte];

        pp->m = 255;

        pp++;

      }

    }

    if (BMP_FERROR(fp)) break;

#endif

  }

  if (BMP_FERROR(fp)) rv = 1;

  return rv;

}

#endif

#endif /* __LIBSIMAGE__ */

/*---------------------------------------------------------------------------*/

int load_lineBMP1(FILE *fp, LPIXEL *pic, UINT w, UINT padw, UCHAR **map)

/*---------------------------------------------------------------------------*/

{

  UINT j, c, bitnum;

  UCHAR byte;

  LPIXEL *pp;

  for (c = 0, pp = pic, j = bitnum = 0; j < padw; j++, bitnum++) {