Function FAllocateBmp

xdevice.cpp:97–127

// Allocate or reallocate a 24 bit color bitmap to have a given size.

flag FAllocateBmp(Bitmap *b, int x, int y)
{
  char sz[cchSzDef];
  long cb;
  byte *rgb;

  if (x == b->x && y == b->y)
    return fTrue;
  if (x < 0 || y < 0 || x > zColmap || y > zColmap) {
    sprintf(sz, "Can't create color bitmap larger than %d by %d!\n",
      zColmap, zColmap);
    PrintError(sz);
    return fFalse;
  }
  cb = CbColmap(x, y);
  if (cb < 0) {
    sprintf(sz, "Can't allocate color bitmap of size %d by %d!\n", x, y);
    PrintError(sz);
    return fFalse;
  }
  if (cb != CbColmap(b->x, b->y)) {
    rgb = (byte *)PAllocate(cb, "color bitmap");
    if (rgb == NULL)
      return fFalse;
    DeallocatePIf(b->rgb);
    b->rgb = rgb;
  }
  b->x = x; b->y = y;
  b->clRow = CbColmapRow(x) >> 2;
  return fTrue;
}


// Load a bitmap from file into a 24 bit bitmap structure. This supports