Function bm_AllocBitmap

bitmap/bitmain.cpp:512–539

Allocs a bitmap of w x h size If add_mem is nonzero, adds that to the amount alloced Returns bitmap handle if successful, -1 if otherwise

// If add_mem is nonzero, adds that to the amount alloced
// Returns bitmap handle if successful, -1 if otherwise
int bm_AllocBitmap(int w, int h, int add_mem) {
  int n = 0, i;
  if (!Bitmaps_initted) {
    Int3();
    mprintf(0, "Bitmaps not initted!!!\n");
    return -1;
  }

  for (i = 0; i < MAX_BITMAPS; i++) {
    if (GameBitmaps[i].used == 0) {
      n = i;
      break;
    }
  }
  // If we can't find a free slot in which to alloc, bail out
  if (i == MAX_BITMAPS) {
    Int3();
    mprintf(0, "ERROR! Couldn't find a free bitmap to alloc!\n");
    return -1;
  }
  memset(&GameBitmaps[n], 0, sizeof(bms_bitmap));
  int ret = bm_AllocateMemoryForIndex(n, w, h, add_mem);
  if (ret >= 0) {
    GameBitmaps[n].used = 1;
    GameBitmaps[n].cache_slot = -1;
  }
  return ret;
}
// Just like bm_AllocBitmap but doesn't actually allocate memory.  Useful for paging!
int bm_AllocNoMemBitmap(int w, int h) {
  int n = 0, i;